CAT28HT64 Datasheet, PDF (1/10 Pages) Catalyst Semiconductor – 64K-Bit CMOS PARALLEL E2PROM

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CAT28HT64
64K-Bit CMOS PARALLEL E²PROM
FEATURES
s Fast Read Access Times:
– 150/200ns
s Low Power CMOS Dissipation:
– Active: 25 mA Max.
– Standby: 300 µA Max.
s Simple Write Operation:
– On-Chip Address and Data Latches
– Self-Timed Write Cycle with Auto-Clear
s Fast Write Cycle Time:
– 5ms Max.
s CMOS and TTL Compatible I/O
Extended Temperature: 170˚C
s Hardware and Software Write Protection
s Automatic Page Write Operation:
– 1 to 32 Bytes in 5ms
– Page Load Timer
s End of Write Detection:
– Toggle Bit
– DATA Polling
s 100,000 Program/Erase Cycles
s 100 Year Data Retention
DESCRIPTION
The CAT28HT64 is a fast, low power, 5V-only CMOS
parallel E²PROM organized as 8K 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
CAT28HT64 features hardware and software write pro-
tection.
The CAT28HT64 is manufactured using Catalyst’s ad-
vanced 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 Ceramic DIP package.
BLOCK DIAGRAM
A5–A12
ADDR. BUFFER
& LATCHES
VCC
CE
OE
WE
INADVERTENT
WRITE
PROTECTION
CONTROL
LOGIC
A0–A4
TIMER
ADDR. BUFFER
& LATCHES
© 1998 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
ROW
DECODER
HIGH VOLTAGE
GENERATOR
DATA POLLING
AND
TOGGLE BIT
COLUMN
DECODER
8-39
8,192 x 8
E²PROM
ARRAY
32 BYTE PAGE
REGISTER
I/O BUFFERS
I/O0–I/O7
5094 FHD F02