AT28C256-25PC Atmel, AT28C256-25PC Datasheet - Page 9
![](/photos/31/32/313280/pdip28_sml.jpg)
AT28C256-25PC
Manufacturer Part Number
AT28C256-25PC
Description
Manufacturer
Atmel
Datasheet
1.AT28C256-25PC.pdf
(27 pages)
Specifications of AT28C256-25PC
Density
256Kb
Interface Type
Parallel
Organization
32Kx8
Access Time (max)
250ns
Write Protection
Yes
Data Retention
10Year
Operating Supply Voltage (typ)
5V
Package Type
PDIP
Operating Temp Range
0C to 70C
Supply Current
50mA
Operating Supply Voltage (min)
4.5V
Operating Supply Voltage (max)
5.5V
Operating Temperature Classification
Commercial
Mounting
Through Hole
Pin Count
28
Lead Free Status / Rohs Status
Not Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT28C256-25PC
Manufacturer:
AT
Quantity:
31
16. Page Mode Characteristics
17. Page Mode Write Waveforms
Notes:
18. Chip Erase Waveforms
0006K–PEEPR–01/08
Symbol
t
t
t
t
t
t
t
t
WC
AS
AH
DS
DH
WP
BLC
WPH
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.
Parameter
Write Cycle Time (option available)
Address Setup Time
Address Hold Time
Data Setup Time
Data Hold Time
Write Pulse Width
Byte Load Cycle Time
Write Pulse Width High
t
t
V
S
W
H
= t
= 10 msec (min.)
= 12.0V ± 0.5V
H
= 5 µsec (min.)
(1)(2)
AT28C256
AT28C256F
Min
100
50
50
50
0
0
Max
150
10
3
AT28C256
Units
ms
ms
ns
ns
ns
ns
ns
µs
ns
9