Symbol Parameter Min Max Units
t
WC
Write Cycle Time
AT28C256 10 ms
AT28C256F 3.0 ms
t
AS
Address Set-up Time 0 ns
t
AH
Address Hold Time 50 ns
t
DS
Data Set-up Time 50 ns
t
DH
Data Hold Time 0 ns
t
WP
Write Pulse Width 100 ns
t
BLC
Byte Load Cycle Time 150 µs
t
WPH
Write Pulse Width High 50 ns
Page Mode Cha racte rist ics
Chip Erase Waveforms
t
S
= t
H
= 5 µsec ( min. )
t
W
= 10 msec (min.)
V
H
= 12.0 V ± 0.5V
Page Mode Wr it e Wave for m s
(1, 2)
Notes: 1. A6 throu gh A14 mu st speci fy the same pa ge address durin g ea ch high to low transitio n of WE (or CE).
2.
OE must be high only when WE and CE are both low.
AT28C256
2-223
