AT27LV520(1998) 查看數據表（PDF） - Atmel Corporation

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AT27LV520
(Rev.:1998)

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

Atmel Corporation 

AT27LV520

AC Programming Characteristics*

TA = 25 ± 5°C, VCC = 6.5 ± 0.25V, OE/VPP = 13.0 ± 0.25V

Symbol Parameter(1)

Test Conditions

Limits

Min

Max

Units

tALE

tLAS

tLAH

tLP

tOES

tOEH

tDS

tDH

tPW

tVR

tVCS

tOE

tDFP

tAS

tAH

tPRT

Address Latch Enable Width

500

Latched Address Setup Time

100

Latched Address Hold Time

100

ALE Low to OE/VPP High Voltage Delay

2

OE/VPP Setup Time

OE/VPP Hold Time

Input Rise and Fall Times

2

(10% to 90%) 20 ns

2

Data Setup Time

Data Hold Time

Input Pulse Levels

2

0.45V to 2.4V

2

ALE Program Pulse Width(2)

OE/VPP Recovery Time

47.5

Input Timing Reference Level

0.8V to 2.0V

2

VCC Setup Time

2

Data Valid from OE/VPP

Output Timing Reference Level

0.8V to 2.0V

OE/VPP High to Output Float Delay(4)

0

Address Setup Time

2

Address Hold Time

0

OE/VPP Pulse Rise Time During

Programming

50

ns

ns

ns

µs

µs

µs

µs

µs

52.5

µs

µs

µs

150

ns

130

ns

µs

µs

ns

Notes:

1. VCC must be applied simultaneously or before OE/VPP and removed simultaneously or after OE/VPP.

2. Program Pulse width tolerance is 50 µsec ± 5%.

3. 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.

Atmel’s 27LV520 Integrated Product Identification Code

Codes

Manufacturer

Device Type

Pins

Hex

A8

AD7

AD6

AD5

AD4

AD3

AD2

AD1

AD0

Data

0

0

0

0

1

1

1

1

0

1E

1

1

0

0

1

1

1

0

1

9D

7

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