AT28BV256-20 ATMEL Corporation, AT28BV256-20 Datasheet - Page 7

• Manufacturer Part Number: AT28BV256-20
• Description: 256K (32K x 8) Battery-Voltage Parallel EEPROMs
• Manufacturer: ATMEL Corporation

AC Write Characteristics
Note:
AC Write Waveforms
WE Controlled
CE Controlled
0273H–PEEPR–10/04
Symbol
t
t
t
t
t
t
t
t
AS
AH
CS
CH
WP
DS
DH
DV
, t
, t
OES
OEH
1. NR = No Restriction.
Parameter
Address, OE Set-up Time
Address Hold Time
Chip Select Set-up Time
Chip Select Hold Time
Write Pulse Width (WE or CE)
Data Set-up Time
Data, OE Hold Time
Time to Data Valid
t
t
OES
t
t
OES
t
t
CS
AS
AS
CS
t
t
AH
AH
t
t
DV
DV
t
t
WP
WP
t
t
DS
DS
t
t
t
OEH
t
OEH
CH
CH
t
WPH
t
t
t
WPH
DH
DH
NR
Min
200
50
50
0
0
0
0
(1)
Max
AT28BV256
Units
ns
ns
ns
ns
ns
ns
ns
7