AT27LV020A ATMEL

Document overview

  • Manufacturer or author: Provided By digicamel.com
  • PDF pages: 9

Technical content

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 µA max. (less than 1 µA 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
  • Rapid™ Programming Algorithm - 100 µs/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

Description

The AT27LV020A is a high performance, low power, low voltage 2,097,152 bit one- time 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 Function A0 - A17 Addresses O0 - O7 Outputs CE Chip Enable OE Output Enable PGM Program Strobe 0549B-A–9/97

2 Megabit

(256K x 8) Low Voltage OTP EPROM AT27LV020A PLCC, Top View TSOP , VSOP Top View Type 1

Atmel's innovative design techniques provide fast speeds that rival 5V parts while keeping the low power consump- tion of a 3V supply. At V CC = 3.0V, any byte can be accessed in less than 90 ns. With a typical power dissipa- tion of only 18 mW at 5 MHz and V CC = 3.3V, the AT27LV020A consumes less than one fifth the power of a standard 5V EPROM. Standby mode supply current is typi- cally less than 1 µA 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 VCC 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 Rapid ™ Pro- gramming Algorithm reduces the time required to program the part and guarantees reliable programming. Program- ming time is typically only 100 µs/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 pro- gramming algorithms and voltages. The AT27LV020A pro- grams 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 tran- sients may exceed data sheet limits, resulting in device non-conformance. At a minimum, a 0.1 µF high frequency, low inherent inductance, ceramic capacitor should be uti- lized for each device. This capacitor should be connected between the V CC 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 µF bulk electrolytic capacitor should be utilized, again connected between the V CC and Ground terminals. This capacitor should be positioned as close as possible to the point where the power supply is connected to the array.

Block Diagram Absolute Maximum Ratings* *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 indicated in the operational sections of this specification is not implied. Expo- sure to absolute maximum rating conditions for extended peri- ods 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 out- put pin voltage is V CC + 0.75V dc which may be exceeded if certain precautions are observed (con- sult application notes) and which may overshoot to +7.0 volts for pulses of less than 20 ns. Operating Modes Notes: 1. X can be VIL or VIH. 2. Read, output disable, and standby modes require, 3. Refer to Programming Characteristics. Programming modes require VCC = 6.5V . 5. T wo 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. Voltage on Any Pin with (1) Voltage on A9 with VPP Supply Voltage with Mode \\ Pin CE OE PGM Ai V PP VCC Outputs Read (2) VIL VIL X (1) Ai X V CC (2) D OUT Output Disable (2) XV IH XX X V CC (2) High Z Standby (2) VIH XX X X V CC (2) High Z Rapid Program (3) VIL VIH VIL Ai V PP VCC (3) D IN PGM Verify (3) VIL VIL VIH Ai V PP VCC (3) D OUT PGM Inhibit (3) VIH XX X V PP VCC (3) High Z Product Identification (3, 5) VIL VIL X A9 = VH (4) A0 = VIH or VIL A1 - A17 = VIL XV CC (3) Identification Code

DC and AC Operating Conditions for Read Operation DC and Operating Characteristics for Read Operation AT27L V020A -90 -12 -15 Operating T emperature (Case) VCC Power Supply 5V ± 10% 5V ± 10% 5V ± 10% Symbol Parameter Condition Min Max Units VCC = 3.0V to 3.6V ILI Input Load Current V IN = 0V to VCC ±1 µA ILO Output Leakage Current V OUT = 0V to VCC ±5 µA IPP1 (2) Read/Standby Current V PP = VCC 10 µA ISB VCC (1) Standby Current I SB1 (CMOS), CE = VCC ± 0.3V 20 µA ISB2 (TTL), CE = 2.0 to VCC + 0.5V 100 µA ICC VCC Active Current f = 5 MHz, I OUT = 0 mA, CE = VIL 8m A VIL Input Low Voltage -0.6 0.8 V VIH Input High Voltage 2.0 V CC + 0 .5 V VOL Output Low Voltage I OL = 2.0 mA 0.4 V VOH Output High Voltage I OH = -2.0 mA 2.4 V VCC = 4.5V to 5.5V ILI Input Load Current V IN = 0V to VCC ±1 µA ILO Output Leakage Current V OUT = 0V to VCC ±5 µA IPP1 (2) Read/Standby Current V PP = VCC 10 µA ISB VCC (1) Standby Current I SB1 (CMOS), CE = VCC ± 0.3V 100 µA ISB2 (TTL), CE = 2.0 to VCC + 0.5V 1 mA ICC VCC Active Current f = 5 MHz, I OUT = 0 mA, CE = VIL 25 mA VIL Input Low Voltage -0.6 0.8 V VIH Input High Voltage 2.0 V CC + 0.5 V VOL Output Low Voltage I OL = 2.1 mA 0.4 V VOH Output High Voltage I OH = -400 µA2 . 4 V

AC Characteristics for Read Operation (VCC = 3.0V to 3.6V and 4.5V to 5.5V) 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 oth- erwise 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. AT27L V020A -90 -12 -15 Symbol Parameter Condition Min Max Min Max Min Max Units tACC (3) Address to Output Delay CE = OE = VIL 90 120 150 ns tCE (2) CE to Output Delay OE = VIL 90 120 150 ns tOE (2, 3) OE to Output Delay CE = VIL 50 50 60 ns tDF (4, 5) OE or CE High to Output Float, whichever occurred first 40 40 50 ns tOH Output Hold from Address, CE or OE, whichever occurred first 000 n s

Input Test Waveform and Measurement Level tR, tF < 20 ns (1% to 90%) Output Test Load Note: CL = 1 pF including jig clearance. Pin Capacitance(f = 1 MHz, T = 25°C)(1) Note: 1. T ypical values for nominal supply voltage. This parameter is only sampled and is not 100% tested. Typ Max Units Conditions C IN 48 p F V IN = 0V C OUT 81 2 p F V OUT = 0V

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 A T27L V020A a 0.1 µF capacitor is required across VPP and ground to suppress spurious voltage transients. DC Programming Characteristics TA = 25 ± 5°C, VCC = 6.5 ± 0.25V , VPP = 13.0 ± 0.25V Symbol Parameter Test Conditions Limits UnitsMin Max ILI Input Load Current V IN = VIL, VIH ±10 µA VIL Input Low Level -0.6 0.8 V VIH Input High Level 2.0 V CC + 0.5 V VOL Output Low Voltage I OL = 2.1 mA 0.4 V VOH Output High Voltage I OH = -400 µA2 . 4 V ICC2 VCC Supply Current (Program and Verify) 40 mA IPP2 VPP Supply Current CE = PGM = VIL 20 mA VID A9 Product Identification Voltage 11.5 12.5 V

AC Programming Characteristics TA = 25 ± 5°C, VCC = 6.5 ± 0.25V , VPP = 13.0 ± 0.25V *AC Conditions of Test: Notes: 1. V CC 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 µsec ± 5%. Atmel's 27LV020A Integrated Product Identification Code (1) Note: 1. The A T27LV020A has the same Product Identification Code as the A T27C020. Both are programming com- patible. Rapid Programming Algorithm A 100 µ 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 µs 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 µs 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. V PP 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. Symbol Parameter Test Conditions* (1) Limits UnitsMin Max tAS Address Setup Time 2 µs tCES CE Setup Time 2 µs tOES OE Setup Time 2 µs tDS Data Setup Time 2 µs tAH Address Hold Time 0 µs tDH Data Hold Time 2 µs tDFP OE High to Output Float Delay 0 130 ns tVPS VPP Setup Time 2 µs tVCS VCC Setup Time 2 µs tPW PGM Program Pulse Width 95 105 µs tOE Data Valid from OE 150 ns tPRT VPP Pulse Rise Time During Programming 50 ns Codes Pins Hex DataA0 O7 O6 O5 O4 O3 O2 O1 O0 Manufacturer 0 0 00111101 E D e v i c e T y p e 1 10000110 8 6

Ordering Information

(ns) ICC (mA) VCC = 3.6V Ordering Code Package Operation RangeActive Standby 90 8 0.02 A T27LV020A-90JC 32J Commercial A T27LV020A-90TC 32T (0°C to 70°C) A T27LV020A-90VC 32V 8 0.02 A T27LV020A-90JI 32J Industrial A T27LV020A-90TI 32T (-40°C to 85°C) A T27LV020A-90VI 32V 120 8 0.02 A T27LV020A-12JC 32J Commercial A T27LV020A-12TC 32T (0°C to 70°C) A T27LV020A-12VC 32V 8 0.02 A T27LV020A-12JI 32J Industrial A T27LV020A-12TI 32T (-40°C to 85°C) A T27LV020A-12VI 32V 150 8 0.02 A T27LV020A-15JC 32J Commercial A T27LV020A-15TC 32T (0°C to 70°C) A T27LV020A-15VC 32V 8 0.02 A T27LV020A-15JI 32J Industrial A T27LV020A-15TI 32T (-40°C to 85°C) A T27LV020A-15VI 32V Package Type 32J 32 Lead, Plastic J-Leaded Chip Carrier (PLCC) 32T 32 Lead, Plastic Thin Small Outline Package (TSOP) 8 x 20 mm 32V 32 Lead, Plastic Thin Small Outline Package (VSOP) 8 x 14 mm