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512K (64K x 8)

Multiplexed

Addresses/

Outputs

Low-voltage

OTP EPROM

AT27LV520

Features

• 8-bit Multiplexed Addresses/Outputs

• Fast Read Access Time – 70 ns

• Dual Voltage Range Operation

– Low-voltage Power Supply Range, 3.0V to 3.6V, or

– Standard 5V ± 10% Supply Range

• Pin Compatible with Standard AT27C520

• Low-power CMOS Operation

– 20 µA max. Standby for ALE = V

and V

= 3.6V

– 29 mW max. Active at 5 MHz for V

= 3.6V

• JEDEC Standard Packages

– 20-lead TSSOP

– 20-lead SOIC

• High-reliability CMOS Technology

– 2,000V ESD Protection

– 200 mA Latch-up Immunity

• Rapid

™

Programming Algorithm – 50 µs/Byte (Typical)

• CMOS- and TTL-compatible Inputs and Outputs

– JEDEC Standard for LVTTL

• Integrated Product Identification Code

• Commercial and Industrial Temperature Range

Description

The AT27LV520 is a low-power, high-performance, 524,288-bit one-time programma-

ble read-only memory (OTP EPROM) organized 64K by eight bits. It incorporates

latches for the eight lower order address bits to multiplex with the eight data bits. This

minimizes system chip count, reduces cost, and simplifies the design of multiplexed

bus systems. It requires only one power supply in the range of 3.0V to 3.6V for normal

read mode operation, making it ideal for fast, portable systems using battery power.

Any byte can be accessed in less than 70 ns.

The AT27LV520 is available in 173 mil, 20-lead TSSOP and 300 mil, 20-lead SOIC,

one-time programmable (OTP) plastic packages.

Rev. 0911D–05/00

Pin Configurations

Pin Name Function

A8 - A15 Addresses

AD0 - AD7 Addresses/Outputs

/VPP Output Enable/Program Supply

ALE Address Latch Enable

TSSOP Top View

A10

A12

A14

ALE

VCC

OE/VPP

A15

A13

A11

AD1

AD3

AD5

AD7

GND

AD6

AD4

AD2

AD0

(continued)

SOIC Top View

OE/VPP

A15

A13

A11

AD0

AD2

AD4

AD6

GND

VCC

ALE

A14

A12

A10

AD1

AD3

AD5

AD7

Summary of content (12 pages)

PAGE 1
Features • 8-bit Multiplexed Addresses/Outputs • Fast Read Access Time – 70 ns • Dual Voltage Range Operation • • • • • • • • – Low-voltage Power Supply Range, 3.0V to 3.6V, or – Standard 5V ± 10% Supply Range Pin Compatible with Standard AT27C520 Low-power CMOS Operation – 20 µA max. Standby for ALE = VIH and VCC = 3.6V – 29 mW max. Active at 5 MHz for VCC = 3.
PAGE 2
Atmel’s innovative design techniques provide fast speeds that rival 5V parts while keeping the low power consumption of a 3.3V supply. At V CC = 3.0V, any byte can be accessed in less than 70 ns. With a typical power dissipation of only 18 mW at 5 MHz and V C C = 3.3V, the AT27LV520 consumes less than one fifth the power of a standard 5V EPROM. Standby mode is achieved by asserting ALE high. Standby mode supply current is typically less than 1 µA at 3.3V. The AT27LV520 operating with VCC at 3.
PAGE 3
AT27LV520 Absolute Maximum Ratings* Temperature under Bias ................................ -55°C to +125°C *NOTICE: Storage Temperature ..................................... -65°C to +150°C 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) Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.
PAGE 4
DC and AC Operating Conditions for Read Operation AT27LV520-70 AT27LV520-90 0°C - 70°C 0°C - 70°C -40°C - +85°C -40°C - +85°C 3.0V to 3.6V 3.0V to 3.6V 5V ±=10% 5V ±=10% Com. Operating Temp. (Case) Ind. VCC Supply DC and Operating Characteristics for Read Operation Symbol Parameter Condition Min Max Units VCC = 3.0V to 3.6V Input Load Current VIN = 0V to VCC ±1 µA Output Leakage Current VOUT = 0V to VCC ±5 µA VCC Standby Current ALE = VCC ± 0.3V; Ai, ADi = GND/VCC ± 0.
PAGE 5
AT27LV520 AC Characteristics for Read Operation VCC = 3.0V to 3.6V and 4.5V to 5.
PAGE 6
Input Test Waveforms and Measurement Levels Output Test Load tR, tF < 20 ns (10% to 90%) Note: CL = 100 pF including jig capacitance. Pin Capacitance f = 1 MHz, T = 25°C(1) Symbol Typ Max Units Conditions CIN 4 6 pF VIN = 0V COUT 8 12 pF VOUT = 0V Note: 6 1. Typical values for nominal supply voltage. This parameter is only sampled and is not 100% tested.
PAGE 7
AT27LV520 Programming Waveforms PROGRAM VCC READ (VERIFY) 6.5V 5.0V tVCS 13V OE/VPP VIH VIL tOES tOEH tPRT ALE tVR tLP VIH VIL tALE tALE tPW tOE AD7 - AD0 VIH VIL A15 - A8 VIH VIL tLAS tLAH ADDR tDS DATA IN tDH tLAS tDFP tLAH ADDR DATA OUT tAH tAS Notes: ADDRESS STABLE 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 accommodated by the programmer. DC Programming Characteristics TA = 25 ± 5°C, VCC = 6.
PAGE 8
AC Programming Characteristics TA = 25 ± 5°C, VCC = 6.5 ± 0.25V, OE/VPP = 13.0 ± 0.25V Limits (1) Symbol Parameter Test Conditions Min tALE Address Latch Enable Width 500 ns tLAS Latched Address Setup Time 100 ns tLAH Latched Address Hold Time 100 ns tLP ALE Low to OE/VPP High Voltage Delay 2 µs tOES OE/VPP Setup Time 2 µs tOEH OE/VPP Hold Time 2 µs tDS Data Setup Time 2 µs tDH Data Hold Time 2 µs Input Rise and Fall Times: (10% to 90%) 20 ns Input Pulse Levels: 0.
PAGE 9
AT27LV520 Rapid™ Programming Algorithm A 50 µs ALE pulse width is used to program. The address is set to the first location. VCC is raised to 6.5V and OE/VPP is raised to 13.0V. Each address is first programmed with one 50 µs ALE 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 50 µs pulses are applied with a verification after each pulse.
PAGE 10
Ordering Information tACC (ns) ICC (mA) Active 90 8 70 8 Ordering Code Package Operation Range AT27LV520-90SC AT27LV520-90XC 20S 20X Commercial (0°C to 70°C) AT27LV520-90SI AT27LV520-90XI 20S 20X Industrial (-40°C to +85°C) AT27LV520-70SC AT27LV520-70XC 20S 20X Commercial (0°C to 70°C) AT27LV520-70SI AT27LV520-70XI 20S 20X Industrial (-40°C to +85°C) Package Type 20S 20-lead, 0.300" Wide, Plastic Gull Wing Small Outline (SOIC) 20X 20-lead, 0.
PAGE 11
AT27LV520 Packaging Information 20S, 20-lead, 0.300" Wide, Plastic Gull Wing Small Outline Dimensions in Inches and (Millimeters) 20X, 20-lead, 0.173" Wide, Thin Super Small Outline Package (TSSOP) Dimensions in (Millimeters) and Inches 0.30(0.012) 0.18(0.007) 0.020 (0.508) 0.013 (0.330) 0.299 (7.60) 0.420 (10.7) 0.291 (7.39) 0.393 (9.98) 4.48(.176) 6.50(.256) 4.30(.169) 6.25(.246) PIN 1 PIN 1 ID .050 (1.27) BSC 0.65(.0256) BSC 0.513 (13.0) 0.497 (12.6) 0.105 (2.67) 0.092 (2.34) 6.60(.260) 6.40(.
PAGE 12
Atmel Headquarters Atmel Operations Corporate Headquarters Atmel Colorado Springs 2325 Orchard Parkway San Jose, CA 95131 TEL (408) 441-0311 FAX (408) 487-2600 Europe 1150 E. Cheyenne Mtn. Blvd. Colorado Springs, CO 80906 TEL (719) 576-3300 FAX (719) 540-1759 Atmel Rousset Atmel U.K., Ltd.