AT27C520 查看數據表（PDF） - Atmel Corporation

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AT27C520

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

Atmel Corporation 

AC Waveforms for Read Operation(1)

tALE

ALE

AT27C520

OE/VPP

AD7 - AD0

tDF

tOH

tAS

tAH tOE

ADDRESS IN

DATA OUT

tACC

A15 - A8

Notes: 1. Timing measurement reference levels for all speed grades are VOL = 0.8V and VOH = 2.0V. Input AC drive levels are VIL =

0.45V and VIH = 2.4V.

2. OE/VPP may be delayed up to tACC - tOE after the address is valid without impact on tACC.

3. This parameter is only sampled and is not 100% tested.

4. Output float is defined as the point when data is no longer driven.

Input Test Waveforms and Measurement Levels

For -70 and -90 devices:

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)

Typ

Max

Units

Conditions

CIN

4

6

pF

VIN = 0V

COUT

8

12

pF

VOUT = 0V

Note: 1. Typical values for nominal supply voltage. This parameter is only sampled and is not 100% tested.

5

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