28C256 データシートの表示（PDF） - ON Semiconductor
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28C256 Datasheet PDF : 14 Pages
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CAT28C256
256 kb Parallel EEPROM
Description
The CAT28C256 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 CAT28C256 features hardware and
software write protection.
The CAT28C256 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, 28−pin TSOP
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
• Hardware and Software Write Protection
• Automatic Page Write Operation:
− 1 to 64 Bytes in 5 ms
− Page Load Timer
• End of Write Detection:
− Toggle Bit
− DATA Polling
• 100,000 Program/Erase Cycles
• 100 Year Data Retention
• Commercial, Industrial and Automotive Temperature Ranges
http://onsemi.com
TSOP−28
T13, H13 SUFFIX
CASE 318AE
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
VCC
VSS
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 14 of this data sheet.
© Semiconductor Components Industries, LLC, 2009
1
December, 2009 − Rev. 6
Publication Order Number:
CAT28C256/D
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