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 

16. 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

Notes:

Address Latch Enable Width

500

ns

Latched Address Setup Time

100

ns

Latched Address Hold Time

100

ns

ALE Low to OE/VPP High Voltage Delay

2

µs

OE/VPP Setup Time

Input Rise and Fall Times:

2

µs

OE/VPP Hold Time

(10% to 90%) 20 ns

2

µs

Data Setup Time

Input Pulse Levels:

2

µs

Data Hold Time

0.45V to 2.4V

2

µs

ALE Program Pulse Width(2)

OE/VPP Recovery Time

47.5

52.5

µs

Input Timing Reference Level:

0.8V to 2.0V

2

µs

VCC Setup Time

2

µs

Data Valid from OE/VPP

Output Timing Reference Level:

OE/VPP High to Output Float Delay(3)

0.8V to 2.0V

0

150

ns

130

ns

Address Setup Time

2

µs

Address Hold Time

0

µs

OE/VPP Pulse Rise Time During

Programming

50

ns

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.

17. Atmel’s AT27LV520 Integrated Product Identification Code

Codes

Pins

Hex

A8

AD7

AD6

AD5

AD4

AD3

AD2

AD1

AD0

Data

Manufacturer

0

0

0

0

1

1

1

1

0

1E

Device Type

1

1

0

0

1

1

1

0

1

9D

Note: 1. The AT27LV520 has the same product identification code as the AT27C520. Both are programming compatible.

8 AT27LV520

0911G–EPROM–8/07

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