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| Features * Fast Read Access Time - 90 ns * Dual Voltage Range Operation * * * Low Voltage Power Supply Range, 3.0V to 3.6V or Standard 5V 10% Supply Range Compatible with JEDEC Standard AT27C020 Low Power CMOS Operation 20 A max. (less than 1 A typical) Standby for VCC = 3.6V 29 mW max. Active at 5 MHz for VCC = 3.6V JEDEC Standard Packages 32-Lead PLCC 32-Lead TSOP (8 X 20 mm) 32-Lead VSOP (8 x 14 mm) High Reliability CMOS Technology 2,000V ESD Protection 200 mA Latchup Immunity RapidTMProgramming Algorithm - 100 s/byte (typical) Two-Line Control CMOS and TTL Compatible Inputs and Outputs JEDEC Standard for LVTTL Integrated Product Identification Code Commercial and Industrial Temperature Ranges * * * * * * 2 Megabit (256K x 8) Low Voltage OTP EPROM AT27LV020A Description The AT27LV020A is a high performance, low power, low voltage 2,097,152 bit onetime programmable read only memory (OTP EPROM) organized as 256K by 8 bits. It requires only one supply in the range of 3.0 to 3.6V in normal read mode operation, making it ideal for fast, portable systems using battery power. Pin Configurations Pin Name A0 - A17 O0 - O7 CE OE PGM Function Addresses Outputs Chip Enable Output Enable Program Strobe PLCC, Top View TSOP VSOP Top View , Type 1 0549B-A-9/97 1 Atmel's innovative design techniques provide fast speeds that rival 5V parts while keeping the low power consumption of a 3V supply. At V CC = 3.0V, any byte can be accessed in less than 90 ns. With a typical power dissipation of only 18 mW at 5 MHz and V C C = 3.3V, the AT27LV020A consumes less than one fifth the power of a standard 5V EPROM. Standby mode supply current is typically less than 1 A at 3.3V. The AT27LV020A is available in industry standard JEDEC approved one-time programmable (OTP) plastic PLCC, TSOP and VSOP packages. All devices feature two-line control (CE, OE) to give designers the flexibility to prevent bus contention. The AT27LV020A operating with V CC at 3.0V produces TTL level outputs that are compatible with standard TTL logic devices operating at VCC = 5.0V. The device is also capable of standard 5-volt operation making it ideally suited for dual supply range systems or card products that are pluggable in both 3-volt and 5-volt hosts. Atmel's AT27LV020A has additional features to ensure high quality and efficient production use. The RapidTMProgramming Algorithm reduces the time required to program the part and guarantees reliable programming. Programming time is typically only 100 s/byte. The Integrated Product Identification Code electronically identifies the device and manufacturer. This feature is used by industry standard programming equipment to select the proper programming algorithms and voltages. The AT27LV020A programs exactly the same way as a standard 5V AT27C020 and uses the same programming equipment. System Considerations Switching between active and standby conditions via the Chip Enable pin may produce transient voltage excursions. Unless accommodated by the system design, these transients may exceed data sheet limits, resulting in device non-conformance. At a minimum, a 0.1 F high frequency, 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 F bulk electrolytic capacitor should be utilized, again connected between the VCC and Ground terminals. This capacitor should be positioned as close as possible to the point where the power supply is connected to the array. 2 AT27LV020A AT27LV020A Block Diagram Absolute Maximum Ratings* Temperature Under Bias .................................. -40C to +85C Storage Temperature ..................................... -65C to +125C Voltage on Any Pin with Respect to Ground........................................ -2.0V to +7.0V (1) Voltage on A9 with Respect to Ground ..................................... -2.0V to +14.0V (1) VPP Supply Voltage with Respect to Ground......................................-2.0V to +14.0V (1) *NOTICE: Stresses beyond those listed under "Absolute Maximum 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 indicated 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 dc which may undershoot to -2.0V for pulses of less than 20 ns.Maximum output pin voltage is VCC + 0.75V dc which may be exceeded if certain precautions are observed (consult application notes) and which may overshoot to +7.0 volts for pulses of less than 20 ns. Operating Modes Mode \ Pin Read (2) Output Disable (2) CE VIL X VIH VIL VIL VIH VIL (3) (3) OE VIL VIH X VIH VIL X VIL PGM X (1) X X VIL VIH X X Ai Ai X X Ai Ai X (4) VPP X X X VPP VPP VPP VCC VCC (2) VCC VCC (2) (2) Outputs DOUT High Z High Z DIN DOUT High Z Standby (2) Rapid Program (3) PGM Verify PGM Inhibit VCC (3) VCC VCC (3) (3) Product Identification (3, 5) Notes: 1. X can be VIL or VIH. 2. Read, output disable, and standby modes require, 3.0V VCC 3.6V, or 4.5V VCC 5.5V. 3. Refer to Programming Characteristics. Programming modes require VCC = 6.5V. 4. VH = 12.0 0.5V. A9 = VH A0 = VIH or VIL X VCC (3) Identification Code A1 - A17 = VIL 5. Two identifier bytes may be selected. All Ai inputs are held low (VIL), except A9 which is set to VH and A0 which is toggled low (VIL) to select the Manufacturer's Identification byte and high (VIH) to select the Device Code byte. 3 DC and AC Operating Conditions for Read Operation AT27LV020A -90 Com. Operating Temperature (Case) Ind. VCC Power Supply -40C - 85C 3.0V to 3.6V 5V 10% -40C - 85C 3.0V to 3.6V 5V 10% -40C - 85C 3.0V to 3.6V 5V 10% 0C - 70C -12 0C - 70C -15 0C - 70C DC and Operating Characteristics for Read Operation Symbol Parameter Condition Min Max 1 5 10 20 100 8 -0.6 2.0 IOL = 2.0 mA IOH = -2.0 mA VIN = 0V to VCC VOUT = 0V to VCC VPP = VCC ISB1 (CMOS), CE = VCC 0.3V ISB2 (TTL), CE = 2.0 to VCC + 0.5V ICC VIL VIH VOL VOH VCC Active Current Input Low Voltage Input High Voltage Output Low Voltage Output High Voltage IOL = 2.1 mA IOH = -400 A 2.4 f = 5 MHz, IOUT = 0 mA, CE = VIL -0.6 2.0 2.4 1 5 10 100 1 25 0.8 VCC + 0.5 0.4 0.8 VCC + 0 .5 0.4 Units A A A A A mA V V V V A A A A mA mA V V V V VCC = 3.0V to 3.6V ILI ILO IPP1 (2) ISB Input Load Current Output Leakage Current Read/Standby Current VCC (1) VIN = 0V to VCC VOUT = 0V to VCC VPP = VCC ISB1 (CMOS), CE = VCC 0.3V ISB2 (TTL), CE = 2.0 to VCC + 0.5V Standby Current ICC VIL VIH VOL VOH ILI ILO IPP1 (2) ISB VCC Active Current Input Low Voltage Input High Voltage Output Low Voltage Output High Voltage f = 5 MHz, IOUT = 0 mA, CE = VIL VCC = 4.5V to 5.5V Input Load Current Output Leakage Current Read/Standby Current VCC (1) Standby Current 4 AT27LV020A AT27LV020A AC Characteristics for Read Operation (VCC = 3.0V to 3.6V and 4.5V to 5.5V) AT27LV020A -90 Symbol tACC (3) tCE tOE (2) (2, 3) -12 Max Min Max Min -15 Max Parameter Address to Output Delay CE to Output Delay OE to Output Delay OE or CE High to Output Float, whichever occurred first Output Hold from Address, CE or OE, whichever occurred first Condition CE = OE = VIL OE = VIL CE = VIL Min Units ns ns ns ns ns 90 90 50 40 0 0 120 120 50 40 0 150 150 60 50 tDF (4, 5) tOH AC Waveforms for Read Operation (1) Notes: 1. Timing measurement references are 0.8V and 2.0V. Input AC drive levels are 0.45V and 2.4V, unless otherwise specififed. 2. OE may be delayed up to tCE - tOE after the falling edge of CE without impact on tCE. 3. OE may be delayed up to tACC - tOE after the address is valid without impact on tACC. 4. This parameter is only sampled and is not 100% tested. 5. Output float is defined as the point when data is no longer driven. 5 Input Test Waveform and Measurement Level Output Test Load tR, tF < 20 ns (1% to 90%) Note: CL = 1 pF including jig clearance. Pin Capacitance (f = 1 MHz, T = 25C) (1) Typ CIN COUT Note: 4 8 Max 8 12 Units pF pF Conditions VIN = 0V VOUT = 0V 1. Typical values for nominal supply voltage. This parameter is only sampled and is not 100% tested. 6 AT27LV020A AT27LV020A Programming Waveforms (1) Notes: 1. The Input Timing Reference is 0.8V for VIL and 2.0V for VIH. 2. tOE and tDFP are characteristics of the device but must be accomodated by the programmer. 3. When programming the AT27LV020A a 0.1 F capacitor is required across VPP and ground to suppress spurious voltage transients. DC Programming Characteristics TA = 25 5C, VCC = 6.5 0.25V, VPP = 13.0 0.25V Symbol ILI VIL VIH VOL VOH ICC2 IPP2 VID Parameter Input Load Current Input Low Level Input High Level Output Low Voltage Output High Voltage VCC Supply Current (Program and Verify) VPP Supply Current A9 Product Identification Voltage Test Conditions VIN = VIL, VIH Limits Min Max 10 -0.6 2.0 0.8 VCC + 0.5 0.4 2.4 40 Units A V V V V mA mA V IOL = 2.1 mA IOH = -400 A CE = PGM = VIL 11.5 20 12.5 7 AC Programming Characteristics TA = 25 5C, VCC = 6.5 0.25V, VPP = 13.0 0.25V Limits Symbol Parameter tAS tCES tOES tDS tAH tDH tDFP tVPS tVCS tPW tOE tPRT Test Conditions* (1) Min Max Rapid Programming Algorithm A 100 s PGM 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 100 s PGM pulse without verification. Then a verification/reprogramming loop is executed for each address. In the event a byte fails to pass verification, up to 10 successive 100 s pulses are applied with a verification after each pulse. If the byte fails to verify after 10 pulses have been applied, the part is considered failed. After the byte verifies properly, the next address is selected until all have been checked. VPP is then lowered to 5.0V and VCC to 5.0V. All bytes are read again and compared with the original data to determine if the device passes or fails. Units s s s s s s Address Setup Time CE Setup Time OE Setup Time Data Setup Time Address Hold Time Data Hold Time OE High to Output Float Delay VPP Setup Time VCC Setup Time PGM Program Pulse Width Data Valid from OE VPP Pulse Rise Time During Programming 2 2 2 2 0 2 0 2 2 95 105 150 50 130 ns s s s ns ns *AC Conditions of Test: Input Rise and Fall Times (10% to 90%).............20 ns Input Pulse Levels..................................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. Output Float is defined as the point where data is no longer driven --see timing diagram. 3. Program Pulse width tolerance is 100 sec 5%. Atmel's 27LV020A Integrated Product Identification Code (1) Pins Codes A0 Manufacturer Device Type 0 1 O7 0 1 O6 0 0 O5 0 0 O4 1 0 O3 1 0 O2 1 1 O1 1 1 O0 0 0 Hex Data 1E 86 Note: 1. The AT27LV020A has the same Product Identification Code as the AT27C020. Both are programming compatible. 8 AT27LV020A AT27LV020A Ordering Information tACC (ns) 90 ICC (mA) VCC = 3.6V Active 8 Standby 0.02 Ordering Code AT27LV020A-90JC AT27LV020A-90TC AT27LV020A-90VC 8 0.02 AT27LV020A-90JI AT27LV020A-90TI AT27LV020A-90VI 120 8 0.02 AT27LV020A-12JC AT27LV020A-12TC AT27LV020A-12VC 8 0.02 AT27LV020A-12JI AT27LV020A-12TI AT27LV020A-12VI 150 8 0.02 AT27LV020A-15JC AT27LV020A-15TC AT27LV020A-15VC 8 0.02 AT27LV020A-15JI AT27LV020A-15TI AT27LV020A-15VI Package 32J 32T 32V 32J 32T 32V 32J 32T 32V 32J 32T 32V 32J 32T 32V 32J 32T 32V Industrial (-40C to 85C) Commercial (0C to 70C) Industrial (-40C to 85C) Commercial (0C to 70C) Industrial (-40C to 85C) Operation Range Commercial (0C to 70C) Package Type 32J 32T 32V 32 Lead, Plastic J-Leaded Chip Carrier (PLCC) 32 Lead, Plastic Thin Small Outline Package (TSOP) 8 x 20 mm 32 Lead, Plastic Thin Small Outline Package (VSOP) 8 x 14 mm 9 |
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