es AT D7 C2()48 Features @ Fast Read Access Time - 70 ns @ Low Power CMOS Operation 100 pA Maximum Standby 35 mA Maximum Active at 5 MHz @ JEDEC Standard Packages 40-Lead 600 mil PDIP 44-Lead PLCC 40-Lead TSOP (10 mm X 14 mm) @ Direct Upgrade from 512K bit and 1M bit (AT27C516 and AT27C1024) EPROMs 5V + 10% Power Supply High Reliability CMOS Technology 2,000V ESD Protection 200 mA Latchup Immunity e Rapid Programming Algorithm - 50 t.s/word (typical) @ CMOS and TTL Compatible Inputs and Outputs @ Integrated Product Identification Code @ Commercial and Industrial Temperature Ranges Description The AT27C2048 is a low-power, high performance 2,097,152 bit one-time program- mable read only memory (OTP EPROM) organized as 128K by 16 bits. It requires a single 5V power supply in normal read mode operation. Any word can be accessed in less than 70 ns, eliminating the need for speed-reducing WAIT states. The by-16 organization makes this part ideal for high-performance 16 and 32 bit microprocessor systems. Pin Configurations Pin Name Function AQ- A16 Addresses 00-015 Outputs CE Chip Enable OE Output Enable PGM Program NC No Connect Note: Both GND pins must be connected. PLCC Top View 013 015 VPP VCC AIG Al4 G14 CE NC PGM Al5 o12 Ai3 on 38 A12 O10 a7. AN 08 36 AIG 08 35 AS GND 34 GND NC 33 NC o7 32 AB 06 31 A? 05 30 AB o4 23 28 27 20 AS 18 20 22 24 26 28 02 CO_NC At A3 03 01 OF AD AZ AS Note: PLCC package pins 1 and 23 are DONT CONNECT. (continued) PDIP Top View vee ft wb vec CE U2 39 b PGM on 43 3p Aw ow 4 37 AIS O13 4 5 BE Ald O12 8 35 Ag ou Wd? 34 ff Ai2 on da 336 All ods 32 Alo os q to a1 as QND gt 30 b GNO o7 412 zoh as ce 713 28 A? os fu 27 As O4 q 15 26 AS o3 d 16 26 As o2 q17 24p A3 or 7] 18 zap az oo J to 2p at OF q 20 21 ao TSOP Top View Type 1 se nef} e cs ald 4 ais ds 33 7 aad 6 36 AS ed a 7 Hs q 9 92 vec] 10 at vep do 30 CEY 12 22 O oat a3 97 93 ora 16 | 28 25 014 o10 4 19 17 24 94 oa 20 *6 22 24 DCUITICVUCUIC oceans GND 2 Megabit (128K x 16) OTP CMOS EPROM Preliminary 0632A 3-179AIMEL Description (Continued) In read mode, the AT27C2048 typically consumes 15 mA. Standby mode supply current is typically less than 10 pA. The AT27C2048 is available in industry standard JEDEC-approved one-time programmable (OTP) plastic, PDIP, PLCC, and TSOP packages. The device features two-line control (CE, OE) to eliminate bus contention in high-speed systems. With high density 128K word storage capability, the AT27C2048 allows firmware to be stored reliably and to be accessed by the system without the delays of mass stor- age media. Atmel's AT27C2048 has additional features that ensure high quality and efficient production use. The Rapid Pro- gramming Algorithm reduces the time required to program the part and guarantees reliable programming. Program- ming time is typically only 50 s/word. The Integrated Product Identification Code electronically identifies the de- vice and manufacturer. This feature is used by industry standard programming equipment to select the proper programming algorithms and voltages. 3-180 System Considerations Switching between active and standby conditions via the Chip Enable pin may produce transient voltage excur- sions. Unless accommodated by the system design, these transients may exceed data sheet limits, resulting in de- vice non-conformance. At a minimum, a 0.1 LF high fre- quency, low inherent inductance, ceramic capacitor should be utilized for each device. This capacitor should be connected between the Vcc and Ground terminals of the device, as close to the device as possible. Additionally, to stabilize the supply voltage level on printed circuit boards with large EPROM arrays, a 4.7 uF bulk electrolytic capacitor should be utilized, again connected between the Vcc and Ground terminals. This capacitor should be posi- tioned as close as possible to the point where the power supply is connected to the array. AT27C2048 cuummmnenennsees {127 C2048 Block Diagram Absolute Maximum Ratings* Vv Temperature Under Bias .............. -55C to +125C as DATA OUTPUTS VPP , O0 - O45 Storage Temperature..........csccees -65C to +150C " AbbAADAAARA AAMAS OE *> >| Voltage on Any Pin with _. OUTPUT cE ~> PROS RAN ee ef BUFFERS Respect to Ground......ccccccsceceecees -2.0V to +7.0V () Pi - PGM - a | V-GATIN Voltage on AQ with AO- A164] DECODER a0] G Respect to Ground ........ceceeee -2.0V to +14.0V |) ADDRESS} | *) CELL MATRIX ; INPUTS | X DECODER + Vpp Supply Voltage with | IDENTIFICATION Respect to Ground.........ceccsecee -2.0V to +14.0V NOTICE: Stresses beyond those listed under Absolute Maxi- mum Ratings may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions beyond those indi- cated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Note: 1. Minimum voltage is -0.6V de which may undershoot to -2.0V for pulses of less than 20 ns. Maximum output pin voltage is Vcc + 0.75V de which may overshoot to +7.0V for pulses of less than 20 ns. Operating Modes Mode \ Pin CE OE PGM Ai Vpp Outputs Read ViL VIL x) Ai x DouT Output Disable Xx VIH xX X Xx High Z Standby Vin X x Xx x High Rapid Program (2) Vit Vin Vit Ai Vpp Din PGM Verity Vit Vit Vir Ai Vpp DouT PGM Inhibit VIH Xx Xx X Vpp High Z Ag = Vy) io Product Identification () ViL Vit x AO = Vin or VIL Veco Genttication A1-A16=ViL Notes: 1. X can be Vir or Vin. 4. Two identifier words may be selected. All Ai inputs 2. Refer to the Programming Characteristics. are held low (Vi_), except A9, which is set to VH, and AO, 3. Va = 12.0+0.5V. which is toggled low (Vit) to select the Manufacturer's Identi- fication word and high (Viu) to select the Device Code word. 5. Standby Vcc current (Iss) is spacified with Vpp = Vcc. Vcc > Vpp will cause a slight increase in Isp. ee AMIEL 3-181AliiiEt DC and AC Operating Conditions for Read Operation AT27C2048 -70 -90 -12 15 Operating Com. orc - 70C 0C - 70C 0C - 70C 0C - 70C Temperature (Case) Ind. -40C - 85C -40C - 85C -40C - 85C -40C - 85C Voc Power Supply 5V+ 10% 5V + 10% 5V + 10% 5V+ 10% DC and Operating Characteristics for Read Operation Symbol Parameter Condition Min Max Units Ju Input Load Current Vin = OV to Voc +1 pA ILo Output Leakage Current Vout = OV to Vcc +5 HA lee: | Vpp " Read/Standby Current Vpp = Vcc 10 yA GE = Veo # 03V 00 WA Isp Voc " Standby Current = vos = Isp2 (TTL) CE = 2.0 to Vcc + 0.5V 1 mA Ioc Vcc Active Current f=5 MH2,lour = 0 mA, 35 mA CE=ViL Vit Input Low Voltage -0.6 0.8 Vv VIH Input High Voltage 2.0 Voc + 0.5 Vv VoL Output Low Voltage lot = 2.1 mA 0.4 Vv VOoH Output High Voltage loH = -400 pA 2.4 Vv Notes: 1. Vcc must be applied simultaneously or before Vpp, and removed simultaneously or after Vpp. 2. Vpp may be connected directly to Vcc, except during pro- gramming. The supply current would then be the sum of Icc and Ipp. AC Characteristics for Read Operation AT27C2048 -70 -90 12 -15 Symbol Parameter Condition Min Max | Min Max | Min Max | Min Max | Units 3) |Address to CE = OE tace | output Delay Vi. 70 90 120 150 | ns tce @) |CE to Output Delay OE = Vit 70 90 120 150 | ns toe (2:3) |OE to Output Delay CE = Vi, 40 40 40 50 | ns 4,5 OE or CE High to tor (4) Output Float, whichever occurred first 30 30 35 40 ns 4 Output Hold from __ tox (4) Address, CE or OE, whichever occurred first 7 0 0 o ns Notes: 2,3, 4, 5. See the AC Waveforms for Read Operation diagram. 3-182 AT27C2048 eumAT27C2048 AC Waveforms for Read Operation ADDRESS ADDRESS VALID cE \ tCE_+| _ t0E ~ OE tACC tOH HIGH Z OUTPUT -~- <j OUTPUT jf VALID Notes: 1. Timing measurement references are 0.8V and 2.0V. 3. OE may be delayed up to tacc - tog after the address is valid Input AC drive levels are 0.45V and 2.4V, unless without impact on tacc. otherwise specified. 4. This parameter is only sampled and is not 100% tested. 2. OE may be delayed up to tce - toe after the falling 5. Output float is defined as the point when data is no longer edge of CE without impact on tce. driven, Input Test Waveforms and Measurement Levels Output Test Load 1.3V Ac 24v 20, AC k (1N914) DRIVING MEASUREMENT 3.3K LEVELS og LEVEL OUTPUT 0.45V PIN cL tr, te < 20 ns (10% to 90%) J Note: CL = 100 pF including jig capacitance. . . 1 Pin Capacitance (f= 1 MHz T = 25C) " Typ Max Units Conditions Cin 4 10 pF Vin = OV Cout 8 12 pF VouT = OV Note: 1. Typical values for nominal supply voltage. This parameter is only sampled and is not 100% tested. ANMEL 3-183AIMEt ) . qi Programming Waveforms READ _ a VIH ft ADDRESS ADDRESS STABLE || OK tas b--] _| + tAH VIK | '0E - DATA VIL {oma IN ____|_ yaar our, tos - --| + tDH | y 6.5V + fee se 5.0V i --| b tOFP 13,.0V <4 [Po oo Vp 5.0V | VIH cE vit re _ VIH PGM VIL |_ 106s OE ViH _ VIL | LL PROGRAM Notes: 1. The Input Timing Reference is 0.8V for Vi_ and 2.0V 3. When programming the AT27C2048, a 0.1 uF capacitor is re- quired across Vpp and ground to suppress spurious voltage for Vin. 2. tog and tprp are characteristics of the device but transients. must be accommodated by the programmer. DC Programming Characteristics Ta = 25 + 5C, Voc = 6.5 + 0.25V, Vpp = 13.0 + 0.25V Limits Symbol Parameter Test Conditions Min Max Units lu Input Load Current Vin = Vit, Vin +10 pA Vit Input Low Level -0.6 0.8 Vv VIH Input High Level 2.0 Veco + 0.5 Vv Vor Output Low Voltage lop = 2.1 mA 0.4 V VoH Output High Voltage loH = -400 pA 2.4 Vv Vec Supply Current loca (Program and Verify) 50 mA Ipp2 Vpep Supply Current CE = Vin 30 mA A9 Product Identification Vip Voltage 11.5 12.5 Vv 3-184 AT27C2048 mumpses AT 7 C2048 AC Programming Characteristics Ta=25+ 5C, Vcc =6.5 + 0.25V, Vpp = 13.0 + 0.25V 5 Test Limits ey Parameter Conditions* Min Max Units tas___| Address Setup Time 2 ps toes | OE Setup Time 2 us tps | Data Setup Time 2 us taH | Address Hold Time 0 ps tbH | Data Hold Time 2 ps tore Output Flat Delay (2) 9 130 ons tvps | Veep Setup Time 2 ps tves | Vcc Setup Time 2 us tew | PGM Program Pulse Width 47.5 525 us toe | Data Valid from OE 150 ons {prt Preramming Time During 50 ns AC Conditions of Test: Input Rise and Fall Times (10% to 90%) 0.0... 20 ns Input Pulse Levels... cc eee eee 0.45V to 2.4V Input Timing Reference Level, 0.8V to 2.0V Output Timing Reference Level................. 0.8V to 2.0V Notes: 1. Vcc must be applied simultaneously or before Vpp and removed simultaneously or after Vpp. 2. This parameter is only sampled and is not 100% tested. Ouput Float is defined as the point where data is no longer driven see timing diagram. 3. Program Pulse width tolerance is 50 usec + 5%. Atmels 27C2048 Integrated Product Identification Code Pins Hex Codes AO 015-08 O7 O6 O5 04 03 02 01 00| Data Manufacturer | 0 0 0001 11 =41 O;001E Device Type | 1 0 1141 =1 0 1 +1 #14 00F7 Rapid Programming Algorithm A 50 us CE pulse width is used to program. The address is set to the first location. Vcc is raised to 6.5V and Vpp is raised to 13.0V. Each address is first programmed with one 50 us CE pulse without verification. Then a verifica- tion/reprogramming loop is executed for each address. !|n the event a word fails to pass verification, up to 10 succes- sive 50 ps pulses are applied with a verification after each pulse. If the word fails to verify after 10 pulses have been applied, the part is considered failed. After the word veri- fies properly, the next address is selected until all have been checked. Vpp is then lowered to 5.0V and Vcc to 5.0V. All words are read again and compared with the original data to determine if the device passes or fails. ADDR = FIRST LOCATION Veg = 6.6V VPP213,0V PROGROAM ONE 60 uS PULSE INCREMENT ADDRESS ADOR = FIRST LOCATION Kea PROGRAM ONE 50 uS PULSE vES Voc = .0V VPP=5,0 COMPARE ALL WORDS TO ORIGINAL DATA GEVICE PASSED Aimer vaANEL Ordering Information tacc lec (mA) Ordering Code Packa Operation Ran (ns) | Active | Standby a P 8 70 35 0.1 AT27C2048-70JC 44) Commercial AT27C2048-70PC 40P6 (0C to 70C) AT27C2048-70VC 40V 35 0.1 AT27C2048-70JI 44J Industrial AT27C2048-70PI 40P6 (-40C to 85C) AT27C2048-70V1 40V 90 35 0.1 AT27C2048-90JC 44J Commercial AT27C2048-90PC 40P6 (0C to 70C) AT27C2048-S90VC 40V 35 0.1 AT27C2048-90J1 44J Industrial AT27C2048-90PI 40P6 (-40C to 85C) AT27C2048-90V1 40V 120 35 0.1 AT27C2048-12JC 44J Commercial AT27C2048-12PC 40P6 (0C to 70C) AT27C2048-12VG 40V 35 0.1 AT27C2048-12J! 44J Industrial AT27C2048-12PI 40P6 (-40C to 85C) AT27C2048-12V1 40V 150 35 0.1 AT27C2048-15JC 44J Commercial AT27C2048-15PC 40P6 (0C to 70C) AT27C2048-15VC 40V 35 0.1 AT27C2048-15J1 44J industrial AT27C2048-15PI 40P6 (-40C to 85C) AT27C2048-15V| 40V Package Type 44J 44 Lead, Plastic J-Leaded Chip Carrier (PLCC) 40P6 40 Lead, 0.600" Wide, Plastic Dual Inline Package (PDIP) 40V 40 Lead, Plastic Thin Small Outline Package (TSOP) 10 x 14mm 3-186 AT27C2048 emu