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CAT28C256PA-15T Datasheet(PDF) 1 Page - Catalyst Semiconductor

No. de pieza CAT28C256PA-15T
Descripción Electrónicos  32K-Bit Parallel E2PROM
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Fabricante Electrónico  CATALYST [Catalyst Semiconductor]
Página de inicio  http://www.catalyst-semiconductor.com
Logo CATALYST - Catalyst Semiconductor

CAT28C256PA-15T Datasheet(HTML) 1 Page - Catalyst Semiconductor

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CAT28C256
32K-Bit Parallel E2PROM
FEATURES
s Fast Read Access Times: 120/150ns
s Low Power CMOS Dissipation:
–Active: 25 mA Max.
–Standby: 150
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
s Hardware and Software Write Protection
s Automatic Page Write Operation:
–1 to 64 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
s Commerical, Industrial and Automotive
Temperature Ranges
DESCRIPTION
The CAT28C256 is a fast, low power, 5V-only CMOS
parallel E2PROM 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 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 DIP, 28-pin TSOP or 32-pin PLCC
packages.
BLOCK DIAGRAM
5096 FHD F02
© 1998 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
ADDR. BUFFER
& LATCHES
ADDR. BUFFER
& LATCHES
INADVERTENT
WRITE
PROTECTION
CONTROL
LOGIC
TIMER
ROW
DECODER
COLUMN
DECODER
HIGH VOLTAGE
GENERATOR
A6–A14
CE
OE
WE
A0–A5
I/O0–I/O7
I/O BUFFERS
32,768 x 8
E2PROM
ARRAY
64 BYTE PAGE
REGISTER
VCC
DATA POLLING
AND
TOGGLE BIT
Doc. No. 25020-0A 2/98


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