AT27LV520-70SU View Datasheet(PDF) - Atmel Corporation

Part Name

Description

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AT27LV520-70SU

512K (64K x 8) Multiplexed Addresses/ Outputs Low-voltage OTP EPROM

Atmel Corporation 

AT27LV520

3. System Considerations

Switching under active conditions may produce transient voltage excursions. Unless accommo-

dated by the system design, these transients may exceed datasheet limits, resulting in device

non-conformance. At a minimum, a 0.1 µF 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 sta-

bilize 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 VCC and Ground termi-

nals. This capacitor should be positioned as close as possible to the point where the power

supply is connected to the array.

4. Block Diagram

VCC

GND

OE/VPP

ALE

OE, ALE, AND

PROGRAM LOGIC

8

OUTPUT

BUFFERS

AD7 - AD0

A15 - A8

Y DECODER

Y-GATING

X DECODER

8

CELL MATRIX

IDENTIFICATION

5. Absolute Maximum Ratings*

Temperature under Bias ................................ -55°C to +125°C

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)

*NOTICE:

Stresses beyond those listed under “Absolute

Maximum Ratings” may cause permanent dam-

age 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.

VPP Supply Voltage with

Respect to Ground .......................................-2.0V to +14.0V(1)

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 overshoot to +7.0V for pulses of less than 20 ns.

3

0911G–EPROM–8/07

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