APPLICATION NOTES AND DEVELOPMENT SYSTEM A V A I L A B L E AN99 * AN115 * AN124 *AN133 * AN134 * AN135 Dual Supply / Low Power / 1024-tap / 2-Wire bus X9118 Preliminary Information Single Digitally-Controlled (XDCPTM) Potentiometer FEATURES DESCRIPTION * 1024 Resistor Taps - 10-Bit Resolution * 2-Wire Serial Interface for write, read, and transfer operations of the potentiometer * Wiper Resistance, 40 Typical @ 5V * Four Non-Volatile Data Registers for Each Potentiometer * Non-Volatile Storage of Multiple Wiper Positions * Power On Recall. Loads Saved Wiper Position on Power Up. * Standby Current < 3A Max * System VCC: - 2.7V to 5.5V Operation * Analog V+/V-: -5V to +5V * 100K End to End Resistance * Endurance: 100, 000 Data changes per bit per register * 100 yr. Data Retention * 14-Lead TSSOP, xx-Lead XBGA * Low power CMOS The X9118 integrates a single digitally controlled potentiometer (XDCP) on a monolithic CMOS integrated circuit. The digital controlled potentiometer is implemented using 1023 resistive elements in a series array. Between each element are tap points connected to the wiper terminal through switches. The position of the wiper on the array is controlled by the user through the 2-wire bus interface. The potentiometer has associated with it a volatile Wiper Counter Register (WCR) and a four non-volatile Data Registers that can be directly written to and read by the user. The contents of the WCR controls the position of the wiper on the resistor array though the switches. Powerup recalls the contents of the default data register (DR0) to the WCR. The XDCP can be used as a three-terminal potentiometer or as a two terminal variable resistor in a wide variety of applications including control, parameter adjustments, and signal processing. FUNCTIONAL DIAGRAM VCC 2-Wire Bus Interface Address Data Status Bus Interface & Control RH Write Read Transfer Control VSS REV 1.1.4 11/10/00 NC Power On Recall 100K 1024-taps POT Wiper Counter Register (WCR) Data Registers (DR0-DR3) NC www.xicor.com V+ Wiper RW RL V- Characteristics subject to change without notice. 1 of 22 X9118 - Preliminary Information DETAILED FUNCTIONAL DIAGRAM VCC V+ Power On Recall SCL SDA A1 A0 DR0 DR1 Interface and Control Circuitry Data DR2 DR3 RH Wiper Counter Register (WCR) 100K 1024-taps RL Control RW WP V- VSS CIRCUIT LEVEL APPLICATIONS SYSTEM LEVEL APPLICATIONS * Vary the gain of a voltage amplifier * Provide programmable dc reference voltages for comparators and detectors * Control the volume in audio circuits * Trim out the offset voltage error in a voltage amplifier circuit * Set the output voltage of a voltage regulator * Trim the resistance in Wheatstone bridge circuits * Control the gain, characteristic frequency and Q-factor in filter circuits * Set the scale factor and zero point in sensor signal conditioning circuits * Vary the frequency and duty cycle of timer ICs * Vary the dc biasing of a pin diode attenuator in RF circuits * Provide a control variable (I, V, or R) in feedback circuits * Adjust the contrast in LCD displays * Control the power level of LED transmitters in communication systems * Set and regulate the DC biasing point in an RF power amplifier in wireless systems * Control the gain in audio and home entertainment systems * Provide the variable DC bias for tuners in RF wireless systems * Set the operating points in temperature control systems * Control the operating point for sensors in industrial systems * Trim offset and gain errors in artificial intelligent systems REV 1.1.4 11/10/00 www.xicor.com Characteristics subject to change without notice. 2 of 22 X9118 - Preliminary Information PIN CONFIGURATION TSSOP V+ NC A0 SCL WP SDA VSS 14 1 13 2 3 12 4 X9118 11 5 10 6 9 8 7 XBGA X9118 VCC RL RH RW NC A1 V- PIN ASSIGNMENTS Pin (TSSOP) Pin (XBGA) Symbol Function 1 V+ Analog Supply Voltage 2 NC No Connect 3 A0 Device Address for 2-wire bus 4 SCL Serial Clock for 2-wire bus 5 WP Hardware Write Protect 6 SDA Serial Data Input/Output for 2-wire bus 7 VSS System Ground 8 V- Analog Supply Voltage 9 A1 Device Address for 2-wire bus 10 NC No Connect 11 RW Wiper terminal of the Potentiometer 12 RH High terminal of the Potentiometer 13 RL Low terminal of the Potentiometer 14 VCC REV 1.1.4 11/10/00 System Supply Voltage www.xicor.com Characteristics subject to change without notice. 3 of 22 X9118 - Preliminary Information PIN DESCRIPTIONS ANALOG SUPPLY VOLTAGES (V+ AND V-) Bus Interface Pins These supplies are the analog voltage supplies for the potentiometer. The V+ supply is tied to the wiper switches while the V- supply is used to bias the switches and the internal P+ substrate of the integrated circuit. Both of these supplies set the voltage limits of the potentiometer. SERIAL DATA INPUT/OUTPUT (SDA) The SDA is a bidirectional serial data input/output pin for a 2-wire slave device and is used to transfer data into and out of the device. It receives device address, opcode, wiper register address and data sent from an 2-wire master at the rising edge of the serial clock SCL, and it shifts out data after each falling edge of the serial clock SCL. It is an open drain output and may be wire-ORed with any number of open drain or open collector outputs. An open drain output requires the use of a pull-up resistor. For selecting typical values, refer to the guidelines for calculating typical values on the bus pull-up resistors graph. SERIAL CLOCK (SCL) This input is used by 2-wire master to supply 2-wire serial clock to the X9118. Other Pins NO CONNECT No connect pins should be left open. These pins are used for Xicor manufacturing and testing purposes. PRINCIPLES OF OPERATION The X9118 is an integrated microcircuit incorporating a resistor array and their its registers and counters and the serial interface logic providing direct communication between the host and the digitally controlled potentiometer. This section provides detail description of the following: - Resistor Array Description DEVICE ADDRESS (A1-A0) - Serial Interface Description The address inputs are used to set the least significant 2 bits of the 8-bit slave address. A match in the slave address serial data stream must be made with the Address input in order to initiate communication with the X9118. A maximum of 4 XDCP devices may occupy the 2-wire serial bus. - Instruction and Register Description HARDWARE WRITE PROTECT INPUT (WP) The WP pin when LOW prevents nonvolatile writes to the Data Registers. Potentiometer Pins RH, RL The RH and RL pins are equivalent to the terminal connections on a mechanical potentiometer. RW The wiper pin is equivalent to the wiper terminal of a mechanical potentiometer. Resistor Array Description The X9118 is comprised of a resistor array. The array contains 1023, in effect, discrete resistive segments that are connected in series (see Figure 1). The physical ends of each array are equivalent to the fixed terminals of a mechanical potentiometer (RH and RL inputs). At both ends of each array and between each resistor segment is a CMOS switch (transmission gate) connected to the wiper (RW) output. Within each individual array only one switch may be turned on at a time. These switches are controlled by the Wiper Counter Register (WCR). The 10-bits of the WCR (WCR[9:0]) are decoded to select, and enable, one of 1024 switches. The WCR may be written directly. The Data Registers and the WCR can be read and written by the host system. Bias Supply Pins SYSTEM SUPPLY VOLTAGE (VCC) AND SUPPLY GROUND (VSS) The VCC pin is the system or digital supply voltage. The VSS pin is the system ground. REV 1.1.4 11/10/00 www.xicor.com Characteristics subject to change without notice. 4 of 22 X9118 - Preliminary Information Figure 1. Detailed Potentiometer Block Diagram Serial Data Path RH Serial Bus Input From Interface Circuitry Register 1 (DR1) Register 0 (DR0) 10 Register 2 (DR2) 10 Parallel Bus Input Register 3 (DR3) Wiper Counter Register (WCR) C O U N T E R D E C O D E If WCR = 000[HEX] then RW = RL If WCR = 3FF[HEX] then RW = RH RL R W Serial Interface Description STOP CONDITION SERIAL INTERFACE - 2-WIRE All communications must be terminated by a stop condition, which is a LOW to HIGH transition of SDA while SCL is HIGH. See Figure 3. The X9118 supports a bidirectional bus oriented protocol. The protocol defines any device that sends data onto the bus as a transmitter and the receiving device as the receiver. The device controlling the transfer is a master and the device being controlled is the slave. The master will always initiate data transfers and provide the clock for both transmit and receive operations. Therefore, the X9118 will be considered a slave device in all applications. CLOCK AND DATA CONVENTIONS Data states on the SDA line can change only during SCL LOW periods. SDA state changes during SCL HIGH are reserved for indicating start and stop conditions. See Figure 3. START CONDITION All commands to the X9118 are preceded by the start condition, which is a HIGH to LOW transition of SDA while SCL is HIGH. The X9118 continuously monitors the SDA and SCL lines for the start condition and will not respond to any command until this condition is met. See Figure 3. REV 1.1.4 11/10/00 ACKNOWLEDGE Acknowledge is a software convention used to provide a positive handshake between the master and slave devices on the bus to indicate the successful receipt of data. The transmitting device, either the master or the slave, will release the SDA bus after transmitting eight bits. The master generates a ninth clock cycle and during this period the receiver pulls the SDA line LOW to acknowledge that it successfully received the eight bits of data. The X9118 will respond with an acknowledge after recognition of a start condition and its slave address and once again after successful receipt of the command byte. If the command is followed by a data byte the X9118 will respond with a final acknowledge. See Figure 2. www.xicor.com Characteristics subject to change without notice. 5 of 22 X9118 - Preliminary Information Figure 2. Acknowledge Response from Receiver SCL from Master 1 8 9 Data Output from Transmitter Data Output from Receiver START ACKNOWLEDGE ACKNOWLEDGE POLLING FLOW 1. ACK Polling Sequence The disabling of the inputs, during the internal nonvolatile write operation, can be used to take advantage of the typical 5ms EEPROM write cycle time. Once the stop condition is issued to indicate the end of the nonvolatile write command the X9118 initiates the internal write cycle. ACK polling, Flow 1, can be initiated immediately. This involves issuing the start condition followed by the device slave address. If the X9118 is still busy with the write operation no ACK will be returned. If the X9118 has completed the write operation an ACK will be returned and the master can then proceed with the next operation. Nonvolatile Write Command Completed EnterACK Polling Issue START Issue Slave Address ACK Returned? Issue STOP No Yes Further Operation? No Yes REV 1.1.4 11/10/00 www.xicor.com Issue Instruction Issue STOP Proceed Proceed Characteristics subject to change without notice. 6 of 22 X9118 - Preliminary Information Instruction and Register Description DEVICE ADDRESSING: IDENTIFICATION BYTE (ID AND A) Following a start condition the master must output the address of the slave it is accessing. The most significant four bits of the slave address are the device type identifier. The ID[3:0] bits is the device id for the X9118; this is fixed as 0101[B] (refer to Table 1). The A[1:0] bits in the ID byte are the internal slave address. The physical device address is defined by the state of the A1-A0 input pins. The slave address is externally specified by the user. The X9118 compares the serial data stream with the address input state; a successful compare of both address bits is required for the X9118 to successfully continue the command sequence. Only the device which slave address matches the incoming device address sent by the master executes the instruction. The A1-A0 inputs can be actively driven by CMOS input signals or tied to VCC or VSS. The R/W bit is the LSB and is used to set the device for read or write operations. INSTRUCTION BYTE AND REGISTER SELECTION The next byte sent to the X9118 contains the instruction and register pointer information. The three most significant bits are used provide the instruction opcode (I[2:0]). The RB and RA bits point to one of the four registers. The format is shown below in Table 2. Table 3 provides a complete summary of the instruction set opcodes. Table 1. Identification Byte Format Internal Slave Address Device Type Identifier ID3 ID2 ID1 ID0 0 1 0 1 0 A1 Read or Write Bit A0 (MSB) R/W (LSB) Table 2. Instruction Byte Format Register Selection Instruction Opcode I2 I1 I0 0 RB (MSB) RA 0 0 (LSB) Register Selected RB RA DR0 0 0 DR1 0 1 DR2 1 0 DR3 1 1 REV 1.1.4 11/10/00 www.xicor.com Characteristics subject to change without notice. 7 of 22 X9118 - Preliminary Information Table 3. Instruction Set Instruction R/W I2 I1 Instruction Set I0 0 RB RA 0 0 Operation Read the contents of the Wiper Counter Register Write new value to the Wiper Counter Register Read the contents of the Data Register pointed to RB-RA. Write new value to the Data Register pointed to RB-RA. Transfer the contents of the Data Register pointed to by RB-RA to the Wiper Counter Register Transfer the contents of the Wiper Counter Register to the Data Register pointed to by RB-RA. Read Wiper Counter Register Write Wiper Counter Register Read Data Register 1 1 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 1 1 0 1 0 1/0 1/0 0 0 Write Data Register 0 1 1 0 0 1/0 1/0 0 0 XFR Data Register to Wiper Counter Register 1 1 1 0 0 1/0 1/0 0 0 XFR Wiper Counter Register to Data Register 0 1 1 1 0 1/0 1/0 0 0 Note: (1) 1/o = data is one or zero. with the value in DR0 upon power-up, this may be different from the value present at power-down. Powerup guidelines are recommended to ensure proper loadings of the DR0 value into the WCR . Instruction and Register Description DEVICE ADDRESSING WIPER COUNTER REGISTER (WCR) The X9118 contains a Wiper Counter Register (see Table 4) for the XDCP potentiometer. The WCR is equivalent to a serial-in, parallel-out register/counter with its outputs decoded to select one of 1024 switches along its resistor array. The contents of the WCR can be altered in one of three ways: (1) it may be written directly by the host via the write Wiper Counter Register instruction (serial load); (2) it may be written indirectly by transferring the contents of one of four associated Data Registers via the XFR Data register; (3) it is loaded with the contents of its Data Register zero (R0) upon power-up. The Wiper Counter Register is a volatile register; that is, its contents are lost when the X9118 is powereddown. Although the register is automatically loaded REV 1.1.4 11/10/00 DATA REGISTERS (DR) The potentiometer has four 10-bit non-volatile Data Registers. These can be read or written directly by the host. Data can also be transferred between any of the four data registers and the Wiper Counter Register. All operations changing data in one of the Data Registers is a nonvolatile operation and will take a maximum of 10ms. If the application does not require storage of multiple settings for the potentiometer, the Data Registers can be used as regular memory locations for system parameters or user preference data. Bit 9-Bit 0 are used to store one of the 1024 wiper position (0 ~1023). www.xicor.com Characteristics subject to change without notice. 8 of 22 X9118 - Preliminary Information Table 4. Wiper Control Register, WCR (10-bit), WCR9-WCR0: Used to store the current wiper position (Volatile, V) WCR9 WCR8 WCR7 WCR6 WCR5 WCR4 WCR3 WCR2 WCR1 WCR0 V V V V V V V V V V (MSB) (LSB) Table 5. Data Register, DR (10-bit), Bit 9-Bit 0: Used to store wiper positions or data (Non-Volatile, NV) Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 NV NV NV NV NV NV NV NV NV NV MSB LSB Two instructions (see Figure 4) require a two-byte sequence to complete. These instructions transfer data between the host and the X9118; either between the host and one of the Data Registers or directly between the host and the Wiper Counter Register. These instructions are: Four of the six instructions are four bytes in length. These instructions are: - Read Wiper Counter Register - read the current wiper position of the potentiometer, - Write Wiper Counter Register - change current wiper position of the potentiometer, - XFR Data Register to Wiper Counter Register - This transfers the contents of one specified Data Register to the Wiper Counter Register. - Read Data Register - read the contents of the selected Data Register; - Write Data Register - write a new value to the selected Data Register. - XFR Wiper Counter Register to Data Register - This transfers the contents of the specified Wiper Counter Register to the specified Data Register. The basic sequence of the four byte instructions is illustrated in Figure 3. These four-byte instructions exchange data between the WCR and one of the Data Registers. A transfer from a data register to a WCR is essentially a write to a static RAM, with the static RAM controlling the wiper position. The response of the wiper to this action will be delayed by tWRL. A transfer from the WCR (current wiper position), to a data register is a write to nonvolatile memory and takes a minimum of tWR to complete. The transfer can occur between the potentiometer and one of its associated registers. See Instruction format for more details. Other POWER UP AND DOWN REQUIREMENTS At all times, the V+ voltage must be greater than or equal to the voltage at RH or RL, and the voltage at RH or RL must be greater than or equal to the voltage at V-. During power up and power down, VCC, V+, and Vmust reach their final values with 1msec of each other. Figure 3. Two-Byte Instruction Sequence SCL SDA 0 1 0 1 S ID3 ID2 ID1 ID0 T A Device ID R T REV 1.1.4 11/10/00 0 A1 A0 R/W Internal Address A C K I2 I1 I0 Instruction Opcode www.xicor.com 0 0 0 RB RA 0 Register Address 0 A C K S T O P Characteristics subject to change without notice. 9 of 22 X9118 - Preliminary Information Figure 4. Four-Byte Instruction Sequence (Write or Read for WCR or Data Registers) SCL SDA 0 1 0 1 0 0 S ID3 ID2 ID1 ID0 0 A1 A0 R/W A I2 I1 I0 T C A Device ID K Instruction Internal R Opcode Address T 0 X 0 X 0 X X X X A C K 0 RB RA 0 Register Address X X W C R 9 W A W W C C C C R K R R 8 7 6 W C R 5 W C R 4 W C R 3 W C R 2 W C R 1 W A C C R K 0 S T O P Wiper or Data Position INSTRUCTION FORMAT Device Type Device S Identifier Addresses T A R 0 1 0 1 0 A1 A0 T R/W=1 Read Wiper Counter Register (WCR) Instruction Opcode S A C K 1 0 0 0 Register Addresses 0 0 Wiper Position (Sent by Slave on SDA) S A W W C C 0 K X X X X X X C R R 9 8 0 Wiper Position (Sent by Slave on SDA) M A W W W W W W W W C C C C C C C C C K R R R R R R R R 7 6 5 4 3 2 1 0 M A C K S T O P Device Type Device S Identifier Addresses T A R 0 1 0 1 0 A1 A0 T R/W=0 Write Wiper Counter Register (WCR) Instruction Opcode S A C K 1 0 1 0 Register Addresses 0 0 0 Wiper Position S (Sent by Master on SDA) A W W C C 0 K X X X X X X C R R 9 8 Wiper Position S (Sent by Master on SDA) A W W W W W W W W C C C C C C C C C K R R R R R R R R 7 6 5 4 3 2 1 0 S A C K S T O P Device Type Device S Identifier Addresses T A R 0 1 0 1 0 A1 A0 T REV 1.1.4 11/10/00 R/W=1 Read Data Register (DR) Instruction Register Wiper Position Opcode Addresses (Sent by Slave on SDA) S S A A W W C C C C K 1 0 1 0 RB RA 0 0 K X X X X X X R R 9 8 www.xicor.com wiper position or data (Sent by Slave on SDA) M A W W W W W W W W C C C C C C C C C K R R R R R R R R 7 6 5 4 3 2 1 0 Characteristics subject to change without notice. M A C K S T O P 10 of 22 X9118 - Preliminary Information Instruction Opcode R/W=0 Device Type Device Identifier Addresses S T A R 0 1 0 1 0 A1 A0 T Register Addresses Wiper Position or Data (Sent by Master on SDA) S S A A W C C C 1 1 0 0 RB RA 0 0 X X X X X X K K R 9 Wiper Position or Data (Sent by Master on SDA) S W A W W W C C C C C R K R R R 8 7 6 5 W C R 4 W C R 3 W C R 2 W C R 1 S S W A T C C O R K P 0 HIGH-VOLTAGE WRITE CYCLE Write Data Register (DR) Transfer Wiper Counter Register (WCR) to Data Register (DR) Device Addresses 0 A1 A0 R/W=0 Device Type S Identifier T A R 0 1 0 1 T Instruction Register Opcode Addresses S S S A A T C C O K 1 1 1 0 RB RA 0 0 K P HIGH-VOLTAGE WRITE CYCLE Transfer Data Register (DR) to Wiper Counter Register (WCR) Device Addresses 0 A1 A0 R/W=1 Device Type S Identifier T A R 0 1 0 1 T Instruction Register Opcode Addresses S S S A A T C C O K 1 1 0 0 RB RA 0 0 K P Notes: (1) "A1 ~ A0": stand for the device addresses sent by the master. (2) WCRx refers to wiper position data in the Wiper Counter Register REV 1.1.4 11/10/00 www.xicor.com Characteristics subject to change without notice. 11 of 22 X9118 - Preliminary Information ABSOLUTE MAXIMUM RATINGS COMMENT Temperature under bias.................... -65C to +135C Storage temperature......................... -65C to +150C Voltage on SCL, SDA, or any address input with respect to VSS ................................. -1V to +7V V = | (VH-VL) | ......................................................5V Voltage on V+ (referenced to VSS)(4) ......................10V Voltage on V- (referenced to VSS)(4) ..................... -10V (V+) - (V-) ..............................................................12V Any Voltage on RH / RL ............................................V+ Any Voltage on RL/ RH ..............................................VLead temperature (soldering, 10 seconds) ........ 300C IW (10 seconds) ..................................................6mA Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only; the functional operation of the device (at these or any other conditions above those listed in the operational sections of this specification) is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. RECOMMENDED OPERATING CONDITIONS Temp Min. Max. Device Supply Voltage (VCC) Limits(4) Commercial Industrial 0C -40C +70C +85C X9118 X9118-2.7 5V 10% 2.7V to 5.5V ANALOG CHARACTERISTICS (Over recommended industrial (2.7V) operation conditions unless otherwise stated.) Limits Symbol Parameter RTOTAL End to End Resistance Min. Typ. Max. 100 End to End Resistance Tolerance Units Test Conditions k 20 % Power Rating 50 mW IW Wiper Current 3 mA RW Wiper Resistance 150 500 Wiper Current = 3mA, VCC = 3V RW Wiper Resistance 40 100 IW = 3mA, VCC = 5V Vv+ Voltage on V+ pin +4.5 +5.5 V X9118(4) +2.7 +5.5 -5.5 -4.5 -5.5 -2.7 VvVTERM Voltage on V- pin Voltage on any RH or RL Pin Noise Resolution Absolute V- V+ REV 1.1.4 11/10/00 V % Ref: 1V MI(3) Rw(n)(actual) - Rw(n)(expected), where n=8 to 1006 1.5 MI(3) Rw(n)(actual) - Rw(n)(expected)(5) 0.5 MI(3) Rw(m + 1) - [Rw(m) + MI], where m=8 to 1006 1 MI(3) Rw(m + 1) - [Rw(m) + MI](5) ppm/C 20 www.xicor.com VSS = 0V 1 300 10/10/25 X9118 X9118-2.7 0.1 Ratiometric Temp. Coefficient CH/CL/CW Potentiometer Capacitancies V dBV Relative Linearity(2) Temperature Coefficient of RTOTAL X9118-2.7(4) -120 Linearity(1) 25C, each pot ppm/C pF See Macro model Characteristics subject to change without notice. 12 of 22 X9118 - Preliminary Information Notes: (1) Absolute linearity is utilized to determine actual wiper voltage versus expected voltage as determined by wiper position when used as a potentiometer. (2) Relative linearity is utilized to determine the actual change in voltage between two successive tap positions when used as a potentiometer. It is a measure of the error in step size. (3) MI = RTOT / 1023 or (RH - RL) / 1023, single pot (4) VCC, V+, V- must reach their final values within 1 msec of each other. (5) n = 0, 1, 2, ...,1023; m =0, 1, 2, ..., 1022. D.C. OPERATING CHARACTERISTICS (Over the recommended operating conditions unless otherwise specified.) Limits Symbol Parameter Min. Typ. Max. Units Test Conditions ICC1 VCC supply current (active) 3 mA fSCL = 400KHz; VCC = +5.5V; SDA = Open; (for 2-wire, Active, Read and Volatile Write States only) ICC2 VCC supply current (nonvolatile write) 5 mA fSCL = 400KHz; VCC = +5.5V; SDA = Open; (for 2-wire, Active, Non-volatile Write State only) ISB VCC current (standby) 3 A VCC = +5.5V; VIN = VSS or VCC; SDA = VCC; (for 2-wire, Standby State only) ILI Input leakage current 10 A VIN = VSS to VCC ILO Output leakage current 10 A VOUT = VSS to VCC VIH Input HIGH voltage VCC x 0.7 VCC + 1 V VIL Input LOW voltage -1 VCC x 0.3 V VOL Output LOW voltage 0.4 V VOH Output HIGH voltage IOL = 3mA ENDURANCE AND DATA RETENTION Parameter Min. Units Minimum Endurance 100,000 Data changes per bit per register Data Retention 100 years CAPACITANCE Symbol (6) CIN/OUT (6) CIN Test Max. Units Test Conditions Input/Output capacitance (SI) 8 pF VOUT = 0V Input capacitance (SCL, WP, A2, A1 and A0) 6 pF VIN = 0V POWER-UP TIMING Symbol (6) tr VCC Parameter VCC Power-up Rate Min. Max. Units 0.2 50 V/ms (7) Power-up to Initiation of read operation 1 ms (7) Power-up to Initiation of write operation 50 ms tPUR tPUW Notes: (6) This parameter is not 100% tested (7) tPUR and tPUW are the delays required from the time the (last) power supply (Vcc-) is stable until the specific instruction can be issued. These parameters are periodically sampled and not 100% tested. REV 1.1.4 11/10/00 www.xicor.com Characteristics subject to change without notice. 13 of 22 X9118 - Preliminary Information A.C. TEST CONDITIONS Input pulse levels VCC x 0.1 to VCC x 0.9 Input rise and fall times Input and output timing level 10ns VCC x 0.5 EQUIVALENT A.C. LOAD CIRCUIT 5V 3V 1533 SPICE Macromodel 867 RTOTAL RL RH SDA OUTPUT SDA OUTPUT 100pF CW CL 10pF CL 10pF 25pF 100pF RW AC TIMINGHIGH-VOLTAGE WRITE CYCLE TIMING Symbol Parameter fSCL Clock Frequency tCYC Clock Cycle Time tHIGH tLOW Min. Max. Units 400 kHz 2500 ns Clock High Time 600 ns Clock Low Time 1300 ns tSU:STA Start Setup Time 600 ns tHD:STA Start Hold Time 600 ns tSU:STO Stop Setup Time 600 ns tSU:DAT SDA Data Input Setup Time 100 ns tHD:DAT SDA Data Input Hold Time 0 ns tR SCL and SDA Rise Time tF SCL and SDA Fall Time tAA SCL Low to SDA Data Output Valid Time tDH 300 ns 300 ns 250 ns SDA Data Output Hold Time 0 ns TI Noise Suppression Time Constant at SCL and SDA inputs 50 ns tBUF Bus Free Time (Prior to Any Transmission) 1300 ns tSU:WPA A0, A1 Setup Time 0 ns tHD:WPA A0, A1 Hold Time 0 ns REV 1.1.4 11/10/00 www.xicor.com Characteristics subject to change without notice. 14 of 22 X9118 - Preliminary Information HIGH-VOLTAGE WRITE CYCLE TIMING Symbol tWR Parameter High-voltage write cycle time (store instructions) Typ. Max. Units 5 10 ms XDCP TIMING Symbol Parameter Min. Max. Units tWRPO Wiper response time after the third (last) power supply is stable 5 10 s Wiper response time after instruction issued (all load instructions) 5 10 s tWRL SYMBOL TABLE WAVEFORM REV 1.1.4 11/10/00 INPUTS OUTPUTS Must be steady Will be steady May change from Low to High Will change from Low to High May change from High to Low Will change from High to Low Don't Care: Changes Allowed N/A Changing: State Not Known Center Line is High Impedance www.xicor.com Characteristics subject to change without notice. 15 of 22 X9118 - Preliminary Information TIMING DIAGRAMS Start and Stop Timing (START) (STOP) tR tF SCL tSU:STA tHD:STA tSU:STO tR tF SDA Input Timing tCYC tHIGH SCL tLOW SDA tSU:DAT tHD:DAT tBUF Output Timing SCL SDA tAA REV 1.1.4 11/10/00 www.xicor.com tDH Characteristics subject to change without notice. 16 of 22 X9118 - Preliminary Information XDCP Timing (for All Load Instructions) (STOP) SCL LSB SDA tWRL RW Write Protect and Device Address Pins Timing (START) (STOP) SCL ... (Any Instruction) ... SDA ... tSU:WPA tHD:WPA WP A0, A1 . REV 1.1.4 11/10/00 www.xicor.com Characteristics subject to change without notice. 17 of 22 X9118 - Preliminary Information APPLICATIONS INFORMATION Basic Configurations of Electronic Potentiometers +VR VR RW I Three terminal Potentiometer; Variable voltage divider Two terminal Variable Resistor; Variable current Application Circuits Noninverting Amplifier VS Voltage Regulator + VO - VIN VO (REG) 317 R1 R2 Iadj R1 R2 VO = (1+R2/R1)VS VO (REG) = 1.25V (1+R2/R1)+Iadj R2 Offset Voltage Adjustment R1 Comparator with Hysterisis R2 VS VS - + VO 100K - VO + } } TL072 R1 R2 10K 10K +12V REV 1.1.4 11/10/00 VUL = {R1/(R1+R2)} VO(max) RLL = {R1/(R1+R2)} VO(min) 10K -12V www.xicor.com Characteristics subject to change without notice. 18 of 22 X9118 - Preliminary Information Application Circuits (Continued) Attenuator Filter C VS + R2 R1 VS VO - - R VO + R3 R4 R2 R1 = R2 = R3 = R4 = 10k R1 GO = 1 + R2/R1 fc = 1/(2RC) VO = G VS -1/2 G +1/2 R1 R2 } } Inverting Amplifier Equivalent L-R Circuit VS R2 C1 - VS VO + + - R1 ZIN VO = G VS G = - R2/R1 R3 ZIN = R2 + s R2 (R1 + R3) C1 = R2 + s Leq (R1 + R3) >> R2 Function Generator C R2 - + R1 - } RA + } RB frequency R1, R2, C amplitude RA, RB REV 1.1.4 11/10/00 www.xicor.com Characteristics subject to change without notice. 19 of 22 X9118 - Preliminary Information XX-ball BGA (X9118xxxxxxx) a a l j m k b b f Top View (Bump Side Down) Bottom View (Bump Side Up) Note: Drawing not to scale = Die Orientation mark d c e Side View (Bump Side Down) Millimeters Symbol Package Body Dimension X a Package Body Dimension Y b Package Height c Package Body Thickness d Ball Height e Ball Diameter f Total Ball Count g Ball Count X Axis h Ball Count Y Axis i Pins Pitch XAxis j Pins Pitch Y Axis k Edge to Ball Center (Corner) Distance Along X l Edge to Ball Center (Corner) Distance Along Y m REV 1.1.4 11/10/00 Min Nom. www.xicor.com Inches Max Min Nom. Characteristics subject to change without notice. Max 20 of 22 X9118 - Preliminary Information PACKAGING INFORMATION 14-Lead Plastic, TSSOP, Package Type V .025 (.65) BSC .169 (4.3) .252 (6.4) BSC .177 (4.5) .193 (4.9) .200 (5.1) .047 (1.20) .0075 (.19) .0118 (.30) .002 (.05) .006 (.15) .010 (.25) Gage Plane 0 - 8 Seating Plane .019 (.50) .029 (.75) Detail A (20X) .031 (.80) .041 (1.05) See Detail "A" NOTE: ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS) REV 1.1.4 11/10/00 www.xicor.com Characteristics subject to change without notice. 21 of 22 X9118 - Preliminary Information ORDERING INFORMATION X9118 Y P T V VCC Limits Blank = 5V 10% -2.7 = 2.7 to 5.5V Device Temperature Range Blank = Commercial = 0C to +70C I = Industrial = -40C to +85C Package V14 = 14-Lead TSSOP xxx = xxx-Lead XBGA Potentiometer Organization Pot T= 100K PART MARK CONVENTION xx Lead XBGA Top Mark X9118xxxx-2.7 X9118xxxx xx X9118 xxxx X9118xxxxx I-2.7 LIMITED WARRANTY (c)Xicor, Inc. 2000 Patents Pending Devices sold by Xicor, Inc. are covered by the warranty and patent indemnification provisions appearing in its Terms of Sale only. Xicor, Inc. makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. Xicor, Inc. makes no warranty of merchantability or fitness for any purpose. Xicor, Inc. reserves the right to discontinue production and change specifications and prices at any time and without notice. Xicor, Inc. assumes no responsibility for the use of any circuitry other than circuitry embodied in a Xicor, Inc. product. No other circuits, patents, or licenses are implied. TRADEMARK DISCLAIMER: Xicor and the Xicor logo are registered trademarks of Xicor, Inc. AutoStore, Direct Write, Block Lock, SerialFlash, MPS, and XDCP are also trademarks of Xicor, Inc. All others belong to their respective owners. U.S. PATENTS Xicor products are covered by one or more of the following U.S. Patents: 4,326,134; 4,393,481; 4,404,475; 4,450,402; 4,486,769; 4,488,060; 4,520,461; 4,533,846; 4,599,706; 4,617,652; 4,668,932; 4,752,912; 4,829,482; 4,874,967; 4,883,976; 4,980,859; 5,012,132; 5,003,197; 5,023,694; 5,084,667; 5,153,880; 5,153,691; 5,161,137; 5,219,774; 5,270,927; 5,324,676; 5,434,396; 5,544,103; 5,587,573; 5,835,409; 5,977,585. Foreign patents and additional patents pending. LIFE RELATED POLICY In situations where semiconductor component failure may endanger life, system designers using this product should design the system with appropriate error detection and correction, redundancy and back-up features to prevent such an occurrence. Xicor's products are not authorized for use in critical components in life support devices or systems. 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. REV 1.1.4 11/10/00 www.xicor.com Characteristics subject to change without notice. 22 of 22