CAT28C257 Datasheet, PDF (1/13 Pages) Catalyst Semiconductor – 256K-Bit CMOS PARALLEL E2PROM

CAT28C257
256 kb CMOS Parallel
EEPROM
Description
The CAT28C257 is a fast, low power, 5 V−only CMOS Parallel
EEPROM organized as 32K x 8−bits. It requires a simple interface for
in−system programming. On−chip address and data latches,
self−timed write cycle with auto−clear and V_CC power up/down write
protection eliminate additional timing and protection hardware. DATA
Polling and Toggle status bits signal the start and end of the self−timed
write cycle. Additionally, the CAT28C257 features hardware and
software write protection.
The CAT28C257 is manufactured using ON Semiconductor’s
advanced CMOS floating gate technology. It is designed to endure
100,000 program/erase cycles and has a data retention of 100 years.
The device is available in JEDEC approved 28−pin DIP or 32−pin
PLCC packages.
Features
• Fast Read Access Times: 120/150 ns
• Low Power CMOS Dissipation:
– Active: 25 mA Max.
– Standby: 150 mA Max.
• Simple Write Operation:
– On−chip Address and Data Latches
– Self−timed Write Cycle with Auto−clear
• Fast Write Cycle Time:
− 5 ms Max.
• CMOS and TTL Compatible I/O
• Automatic Page Write Operation:
− 1 to 128 Bytes in 5 ms
− Page Load Timer
• End of Write Detection:
− Toggle Bit
− DATA Polling
• Hardware and Software Write Protection
• 100,000 Program/Erase Cycles
• 100 Year Data Retention
• Commercial, Industrial and Automotive Temperature Ranges
http://onsemi.com
PDIP−28
P, L SUFFIX
CASE 646AE
PLCC−32
N, G SUFFIX
CASE 776AK
Pin Name
A₀−A₁₄
I/O₀−I/O₇
CE
OE
WE
V_CC
V_SS
NC
PIN FUNCTION
Function
Address Inputs
Data Inputs/Outputs
Chip Enable
Output Enable
Write Enable
5 V Supply
Ground
No Connect
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 13 of this data sheet.
© Semiconductor Components Industries, LLC, 2009
1
December, 2009 − Rev. 6
Publication Order Number:
CAT28C257/D