5962-8852516XX 参数 Datasheet PDF下载

AT28C256

16. Page Mode Characteristics

Symbol

t

WC

t

AS

t

AH

t

DS

t

DH

t

WP

t

BLC

t

WPH

Parameter

AT28C256

Write Cycle Time (option available)

AT28C256F

Address Setup Time

Address Hold Time

Data Setup Time

Data Hold Time

Write Pulse Width

Byte Load Cycle Time

Write Pulse Width High

50

0

50

50

0

100

150

3

ms

ns

ns

ns

ns

ns

µs

ns

Min

Max

10

Units

ms

17. Page Mode Write Waveforms

Notes:

1. A6 through A14 must specify the same page address during each high to low transition of WE (or CE).

2. OE must be high only when WE and CE are both low.

18. Chip Erase Waveforms

t

S

= t

H

= 5 µsec (min.)

t

W

= 10 msec (min.)

V

H

= 12.0V ± 0.5V

9

0006M–PEEPR–12/09