AT29C257-20JI Atmel, AT29C257-20JI Datasheet - Page 7

• Manufacturer Part Number: AT29C257-20JI
• Description: IC FLASH 256KBIT 200NS 32PLCC
• Manufacturer: Atmel

Specifications of AT29C257-20JI

• Format - Memory: FLASH
• Memory Type: FLASH
• Memory Size: 256K (32K x 8)
• Speed: 200ns
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: AT29C25720JI

Notes: 1. A6 through A14 must specify the page address
Program Cycle Characteristics
Program Cycle Waveforms
Symbol
t
t
t
t
t
t
t
t
WC
AS
AH
DS
DH
WP
BLC
WPH
2. OE must be high when WE and CE are both low.
during each high to low transition of WE (or CE).
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, 3)
Min
100
50
35
90
0
0
3. All bytes that are not loaded within the page being
programmed will be indeterminate.
Max
150
10
AT29C257
Units
ms
ns
ns
ns
ns
ns
ns
s
4-111