74VHC244 # 74VHCT244 Octal Buffer/Line Driver with TRI-STATEE Outputs General Description Features The 'VHC/'VHCT244 is an advanced high speed CMOS octal bus buffer fabricated with silicon gate C2MOS technology. It achieves high speed operation similar to equivalent Bipolar Schottky TTL while maintaining the CMOS low power dissipation. The 'VHC/'VHCT244 is a non-inverting TRI-STATE buffer having two active-low output enables. These devices are designed to be used as TRI-STATE memory address drivers, clock drivers, and bus oriented transmitter/receivers. An input protection circuit ensures that 0V-7V can be applied to the input pins without regard to the supply voltage. This device can be used to interface 5V to 3V systems and two supply systems such as battery back up. This circuit prevents device destruction due to mismatched supply and input voltages. Y Commercial Package Number Y Y Y Y Y High noise immunity: VHC VNIH e VNIL e 28% VCC (min) VHCT VIH e 2.0V, VIL e 0.8V Power down protection: VHC inputs only VHCT inputs and outputs Low noise: VHC VOLP e 0.6V (typ) VHCT VOLP e 0.7V (typ) Low power dissipation: ICC e 4 mA (max) @ TA e 25 C Balanced propagation delays: tPLH j tPHL Pin and function compatible with 74HC/HCT244 NOTE: ADD EXTERNAL PULL UP RESISTOR TO VHCT OUTPUTS TO DRIVE CMOS INPUTS Package Description 74VHC244M M20B 20-Lead Molded JEDEC SOIC 74VHC244SJ M20D 20-Lead Molded EIAJ SOIC 74VHC244MSC MSC20 20-Lead Molded EIAJ Type 1 SSOP 74VHC244MTC MTC20 20-Lead Molded JEDEC Type 1 TSSOP 74VHC244N N20A 20-Lead Molded DIP 74VHCT244M M20B 20-Lead Molded JEDEC SOIC 74VHCT244SJ M20D 20-Lead Molded EIAJ SOIC 74VHCT244MTC MTC20 20-Lead Molded JEDEC Type 1 TSSOP 74VHCT244N N20A 20-Lead Molded DIP Note: Surface mount packages are also available on Tape and Reel. Specify by appending the suffix letter ``X'' to the ordering code. EIAJ Type 1 SSOP available on Tape and Reel only, order MSCX. Logic Symbol Connection Diagram Truth Tables Pin Assignment for DIP, SSOP, TSSOP and SOIC IEEE/IEC Inputs OE1 In L L H L H X Outputs (Pins 12, 14, 16, 18) L H Z Inputs TL/F/11522 - 1 Pin Names In L L H L H X Outputs (Pins 3, 5, 7, 9) L H Z H e HIGH Voltage Level L e LOW Voltage Level TL/F/11522-3 OE1, OE2 I0 -I7 O0 -O7 OE2 I e Immaterial Ze High Impedance Description TRI-STATE Output Enable Inputs Inputs TRI-STATE Outputs TRI-STATEE is a registered trademark of National Semiconductor Corporation. C1995 National Semiconductor Corporation TL/F/11522 RRD-B30M125/Printed in U. S. A. 74VHC244 # 74VHCT244 Octal Buffer/Line Driver with TRI-STATE Outputs October 1995 Absolute Maximum Ratings (Note 1) Supply Voltage (VCC) DC Input Voltage (VIN) DC Output Voltage (VOUT) VHC VHCT* Note 1: Absolute Maximum Ratings are values beyond which the device may be damaged or have its useful life impaired. The databook specifications should be met, without exception, to ensure that the system design is reliable over its power supply, temperature, and output/input loading variables. National does not recommend operation outside databook specifications. b 0.5V to a 7.0V b 0.5V to a 7.0V b 0.5V to VCC a 0.5V b 0.5V to 7.0V Input Diode Current (IIK) Output Diode Current (IOK) VHC VHCT b 20 mA DC Output Current (IOUT) DC VCC/GND Current (ICC) Storage Temperature (TSTG) Lead Temperature (TL) (Soldering, 10 seconds) g 25 mA Recommended Operating Conditions g 20 mA b 20 mA Supply Voltage (VCC) VHC VHCT Input Voltage (VIN) g 75 mA b 65 C to a 150 C 260 C 2.0V to 5.5V 4.5V to 5.5V Output Voltage (VOUT) Operating Temperature (TOPR) 74VHC/VHCT *VOUT l VCC only if output is in H or Z state. Input Rise and Fall Time (tr, tf) VCC e 3.3V g 0.3V (VHC Only) VCC e 5.0V g 0.5V 0V to a 5.5V 0V to VCC b 40 C to a 85 C 0 ns/V E 100 ns/V 0 ns/V E 20 ns/V DC Characteristics for 'VHC Family Devices Symbol Parameter VCC (V) 74VHC 74VHC TA e 25 C TA e b40 C to a 85 C Min VIH High Level Input Voltage VIL Low Level Input Voltage VOH High Level Output Voltage VOL Low Level Output Voltage 2.0 3.0-5.5 Typ Min 0.5 0.3 VCC 2.0 3.0 4.5 1.9 2.9 4.4 3.0 4.5 2.58 3.94 2.0 3.0 4.5 0.0 0.0 0.0 3.0 4.5 2 Conditions Max 1.5 0.7 VCC 2.0 3.0-5.5 2.0 3.0 4.5 Max 1.5 0.7 VCC Units V 0.5 0.3 VCC V 1.9 2.9 4.4 V 2.48 3.80 V 0.1 0.1 0.1 0.1 0.1 0.1 V 0.36 0.36 0.44 0.44 V VIN e VIH IOH e b50 mA or VIL IOH e b4 mA IOH e b8 mA VIN e VIH IOL e 50 mA or VIL IOL e 4 mA IOL e 8 mA DC Characteristics for 'VHC Family Devices (Continued) Symbol Parameter VCC (V) Min IOZ TRI-STATE Output Off-State Current IIN Input Leakage Current ICC Quiescent Supply Current 74VHC 74VHC TA e 25 C TA e b40 C to a 85 C Typ Max Min Units Conditions Max 5.5 g 0.25 g 2.5 mA VIN e VIH or VIL VOUT e VCC or GND 0 - 5.5 g 0.1 g 1.0 mA VIN e 5.5V or GND 5.5 4.0 40.0 mA VIN e VCC or GND DC Characteristics for 'VHC Family Devices 74VHC Symbol Parameter VCC (V) TA e 25 C Typ Limits Units Conditions VOLP** Quiet Output Maximum Dynamic VOL 5.0 0.6 0.9 V CL e 50 pF VOLV** Quiet Output Minimum Dynamic VOL 5.0 b 0.6 b 0.9 V CL e 50 pF VIHD** Minimum High Level Dynamic Input Voltage 5.0 3.5 V CL e 50 pF VILD** Maximum High Level Dynamic Input Voltage 5.0 1.5 V CL e 50 pF **Parameter guaranteed by design. 3 DC Characteristics for 'VHCT Family Devices Symbol VCC (V) Parameter Min VIH High Level Input Voltage 4.5 5.5 VIL Low Level Input Voltage 4.5 5.5 VOH High Level Output Voltage 4.5 3.15 4.5 2.5 VOL Low Level Output Voltage 4.5 IOZ 74VHC 74VHC TA e 25 C TA e b40 C to a 85 C Typ Min 2.0 2.0 V 0.8 0.8 0.8 0.8 3.65 3.15 V V VIN e VIH IOH e b50 mA or VIL I OH e b 8 mA V VIN e VIH IOL e 50 mA or VIL I e 8 mA OL 2.4 0.0 0.1 0.1 0.36 0.44 5.5 g 0.25 g 2.5 mA 0-5.5 g 0.1 g 1.0 mA Quiescent Supply Current 5.5 4.0 40.0 mA ICCT Maximum ICC/Input 5.5 1.35 1.50 mA IOPD Output Leakage (Power Down State) IIN Input Leakage Current ICC Conditions Max 2.0 2.0 4.5 TRI-STATE Output Off-State Current Max Units VIN e VIH or VIL VOUT e VCC or GND VIN e 5.5V or GND VIN e VCC or GND VIN e 3.4V, Other Inputs e VCC or GND VOUT e 5.5V 0.0 a 0.5 a 5.0 mA DC Characteristics for 'VHCT Family Devices: 74VHCT VCC (V) Units Conditions 1.0 V CL e 50 pF b 1.0 V CL e 50 pF Minimum High Level Dynamic Input Voltage 2.0 V CL e 50 pF Maximum High Level Dynamic Input Voltage 0.8 V CL e 50 pF Symbol Parameter Typ Limits VOLP** Quiet Output Maximum Dynamic VOL 0.7 VOLV** Quiet Output Minimum Dynamic VOL b 0.7 VIHD** VILD** TA e 25 C **Parameter guaranteed by design. 4 AC Electrical Characteristics for 'VHC Family Devices: Symbol VCC (V) Parameter 74VHC 74VHC TA e 25 C TA e b40 C to a 85 C Min tPLH, tPHL Propagation Delay Time 3.3 g 0.3 5.0 g 0.5 tPZL, tPZH TRI-STATE Output Enable Time 3.3 g 0.3 5.0 g 0.5 tPLZ, tPHZ Typ Max Min Max 5.8 8.4 1.0 10.0 8.3 11.9 1.0 13.5 3.9 5.5 1.0 6.5 5.4 7.5 1.0 8.5 6.6 10.6 1.0 12.5 9.1 14.1 1.0 16.0 4.7 7.3 1.0 8.5 6.2 9.3 1.0 10.5 10.3 14.0 1.0 16.0 Units Conditions CL e 15 pF ns CL e 50 pF CL e 15 pF ns CL e 50 pF ns RL e 1 kX CL e 50 pF CL e 15 pF ns CL e 50 pF TRI-STATE Output Disable Time 3.3 g 0.3 tOSLH, tOSHL Output to Output Skew 3.3 g 0.3 1.5 1.5 5.0 g 0.5 1.0 1.0 CIN Input Capacitance 4 10 10 pF VCC e Open COUT Output Capacitance 6 pF VCC e 5.0V CPD Power Dissipation Capacitance 19 pF 6.7 5.0 g 0.5 l l l 9.2 1.0 10.5 CL e 15 pF RL e 1 kX ns ns CL e 50 pF CL e 50 pF (Note 1) CL e 50 pF CL e 50 pF (Note 2) l Note 1: Parameter guaranteed by design. tOSLH e tPLHmax b tPLHmin ; tOSHL e tPHLmax b tPHLmin . Note 2: CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating current consumption without load. Average operating current can be obtained by the equation: ICC (OPR.) e CPD * VCC * fIN a ICC/8 (per bit). 5 AC Electrical Characteristics for 'VHCT Family Devices Symbol Parameter VCC (V) 74VHCT 74VHCT TA e 25 C TA e b40 C to a 85 C Min tPLH, tPHL Propagation Delay Time 5.0 g 0.5 tPZL, tPZH TRI-STATE Output Enable Time 5.0 g 0.5 Typ Max Min Max 5.4 7.4 1.0 8.5 5.9 8.4 1.0 9.5 7.7 10.4 1.0 12.0 8.2 11.4 1.0 13.0 Units Conditions CL e 15 pF ns CL e 50 pF RL e 1 kX ns CL e 50 pF tPLZ, tPHZ TRI-STATE Output Disable Time 5.0 g 0.5 tOSLH, tOSHL Output to Output Skew 5.0 g 0.5 CIN Input Capacitance 4 pF VCC e Open COUT Output Capacitance 9 pF VCC e 5.0V CPD Power Dissipation Capacitance 18 pF 8.8 11.4 1.0 13.0 ns 1.0 1.0 ns 10 10 CL e 15 pF RL e 1 kX CL e 50 pF (Note 1) CL e 50 pF (Note 2) Note 1: Parameter guaranteed by design. tOSLH e l tPLHmax b tPLHmin l ; tOSHL e l tPHLmax b tPHLmin l . Note 2: CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating current consumption without load. Average operating current can be obtained by the equation: ICC (OPR.) e CPD * VCC * fIN a ICC/8 (per bit). 6 Ordering Information The device number is used to form part of a simplified purchasing code, where the package type and temperature range are defined as follows: TL/F/11522 - 4 7 Physical Dimensions inches (millimeters) 20-Lead Small Outline Integrated Circuit JEDEC SOIC (M) Order Number 74VHC244M, 74VHC244MX, 74VHCT244M or 74VHCT244MX NS Package Number M20B 20-Lead Small Outline Integrated Circuit-EIAJ SOIC (SJ) Order Number 74VHC244SJ, 74VHC244SJX, 74VHCT244SJ or 74VHCT244SJX NS Package Number M20D 8 Physical Dimensions millimeters 20-Lead Plastic EIAJ SSOP Type I (MSC) Order Number 74VHC244MSCX NS Package Number MSC20 20-Lead Plastic JEDEC TSSOP Type I (MTC) Order Number 74VHC244MTC, 74VHC244MTCX, 74VHCT244MTC or 74VHCT244MTCX NS Package Number MTC20 9 74VHC244 # 74VHCT244 Octal Buffer/Line Driver with TRI-STATE Outputs Physical Dimensions (millimeters) (Continued) 20-Lead Molded DIP Order Number 74VHC244N or 74VHCT244N NS Package Number N20A LIFE SUPPORT POLICY NATIONAL'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION. 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