8

0189G–EPROM–05/05

AT27C040

Notes:

1. V

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%.

15. DC Programming Characteristics

T

Symbol

Parameter

Test Conditions

Limits

Units

Min

Max

Input Load Current

±10

µA

V

IL

Input Low Level

-0.6

0.8

V

V

IH

Input High Level

2.0

V

V

Output Low Voltage

0.4

V

V

OH

Output High Voltage

I

2.4

V

I

CC2

V

40

mA

20

mA

V

ID

A9 Product Identification Voltage

11.5

12.5

V

16. AC Programming Characteristics

T

Symbol

Parameter

Test Conditions

(1)

Limits

Units

Min

Max

t

AS

Address Setup Time

Input Rise and Fall Times:

(10% to 90%) 20 ns

Input Pulse Levels:

0.45V to 2.4V

Input Timing Reference Level:

0.8V to 2.0V

Output Timing Reference Level:

0.8V to 2.0V

2µs

t

OES

OE Setup Time

2

µs

t

DS

Data Setup Time

2

µs

t

AH

Address Hold Time

0

µs

t

DH

Data Hold Time

2

µs

t

DFP

OE High to Output Float Delay

(2)

0

130

ns

t

VPS

V

2

µs

t

VCS

V

2

µs

CE Program Pulse Width

(3)

95

105

µs

t

OE

Data Valid from OE

(2)

150

ns

t

PRT

V

Programming

50

ns

17. Atmel’s AT27C040 Integrated Product Identification Code

Codes

Pins

Hex Data

A0

O7

O6

O5

O4

O3

O2

O1

O0

Manufacturer

0

0

00

111

10

1E

Device Type

1

0

00

010

11

0B