AT28HC256-12 ATMEL [ATMEL Corporation], AT28HC256-12 Datasheet - Page 7

• Manufacturer Part Number: AT28HC256-12
• Description: 256 32K x 8 High Speed Parallel EEPROMs
• Manufacturer: ATMEL [ATMEL Corporation]

Page Mode Write Characteristics
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).
Chip Erase Waveforms
t
t
V
S
W
H
= t
Symbol
t
t
t
t
t
t
t
t
= 10 msec (min.)
= 12.0V
WC
AS
AH
DS
DH
WP
BLC
WPH
H
= 5 sec (min.)
2. OE must be high only when WE and CE are both low.
0.5V
Parameter
Write Cycle Time
Address Set-up Time
Address Hold Time
Data Set-up Time
Data Hold Time
Write Pulse Width
Byte Load Cycle Time
Write Pulse Width High
(1, 2)
AT28HC256
AT28HC256F
Min
100
50
50
50
0
0
Typ
5
2
AT28HC256
Max
150
3.0
10
Units
ms
ms
ns
ns
ns
ns
ns
ns
s
2-285