
AT28C256
16. Page Mode Characteristics
Symbol
t WC
Parameter
Write Cycle Time (option available)
AT28C256
AT28C256F
Min
Max
10
3
Units
ms
ms
t AS
t AH
t DS
t DH
t WP
t BLC
t WPH
Address Setup Time
Address Hold Time
Data Setup Time
Data Hold Time
Write Pulse Width
Byte Load Cycle Time
Write Pulse Width High
0
50
50
0
100
50
150
ns
ns
ns
ns
ns
μs
ns
17. Page Mode Write Waveforms (1)(2)
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