AT27LV256A-12 Ver la hoja de datos (PDF) - Atmel Corporation

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AT27LV256A-12

256K (32K x 8) Low-voltage OTP EPROM

Atmel Corporation 

AC Programming Characteristics

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

Limits

Symbol Parameter

Test Conditions(1)

Min

Max

Units

tAS

Address Setup Time

2

µs

tOES

OE Setup Time

tDS

Data Setup Time

2

Input Rise and Fall Times:

(10% to 90%) 20 ns

2

tAH

Address Hold Time

0

tDH

Data Hold Time

Input Pulse Levels:

2

tDFP

OE High to Output Float Delay(2)

0.45V to 2.4V

0

µs

µs

µs

µs

130

ns

tVPS

VPP Setup Time

tVCS

VCC Setup Time

tPW

CE Program Pulse Width(3)

tOE

Data Valid from OE(2)

Input Timing Reference Level:

2

µs

0.8V to 2.0V

2

µs

95

105

µs

Output Timing Reference Level:

0.8V to 2.0V

150

ns

tPRT

VPP Pulse Rise Time During

Programming

50

ns

Notes:

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

2. 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.

3. Program Pulse width tolerance is 100 ∫µsec=±=5%.

Atmel’s 27LV256A Integrated Product Identification Code(1)

Codes

Pins

Hex

A0

O7

O6

O5

O4

O3

O2

O1

O0

Data

Manufacturer

0

0

0

0

1

1

1

1

0

1E

Device Type

1

1

0

0

0

1

1

0

0

8C

Note: 1. The AT27LV256A has the same Product Identification Code as the AT27C256R. Both are programming compatible.

8

AT27LV256A

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