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CAT28C257 Scheda tecnica(PDF) 1 Page - ON Semiconductor

Il numero della parte CAT28C257
Spiegazioni elettronici  256 kb CMOS Parallel EEPROM
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Produttore elettronici  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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© Semiconductor Components Industries, LLC, 2009
December, 2009 − Rev. 6
1
Publication Order Number:
CAT28C257/D
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 VCC 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
See detailed ordering and shipping information in the package
dimensions section on page 13 of this data sheet.
ORDERING INFORMATION
PLCC−32
N, G SUFFIX
CASE 776AK
Address Inputs
A0−A14
Data Inputs/Outputs
I/O0−I/O7
Chip Enable
CE
Output Enable
OE
Write Enable
WE
5 V Supply
VCC
Function
Pin Name
PIN FUNCTION
Ground
VSS
No Connect
NC
PDIP−28
P, L SUFFIX
CASE 646AE


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