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CAT28C257N-12T Scheda tecnica(PDF) 1 Page - Catalyst Semiconductor

Il numero della parte CAT28C257N-12T
Spiegazioni elettronici  256K-Bit CMOS PARALLEL EEPROM
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Produttore elettronici  CATALYST [Catalyst Semiconductor]
Homepage  http://www.catalyst-semiconductor.com
Logo CATALYST - Catalyst Semiconductor

CAT28C257N-12T Scheda tecnica(HTML) 1 Page - Catalyst Semiconductor

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1
ADDR. BUFFER
& LATCHES
ADDR. BUFFER
& LATCHES
INADVERTENT
WRITE
PROTECTION
CONTROL
LOGIC
TIMER
ROW
DECODER
COLUMN
DECODER
HIGH VOLTAGE
GENERATOR
A7–A14
CE
OE
WE
A0–A6
I/O0–I/O7
I/O BUFFERS
32,768 x 8
EEPROM
ARRAY
128 BYTE PAGE
REGISTER
VCC
DATA POLLING
AND
TOGGLE BIT
CAT28C257
256K-Bit CMOS PARALLEL EEPROM
FEATURES
Fast read access times: 120/150 ns
Low power CMOS dissipation:
–Active: 25 mA max.
–Standby: 150
µA max.
Simple write operation:
–On-chip address and data latches
–Self-timed write cycle with auto-clear
Fast write cycle time:
–5ms max
CMOS and TTL compatible I/O
Automatic page write operation:
–1 to 128 Bytes in 5ms
–Page load timer
End of write detection:
–Toggle bit
DATA
DATA
DATA
DATA
DATA polling
Hardware and software write protection
100,000 Program/erase cycles
100 Year data retention
Commercial, industrial and automotive
temperature ranges
DESCRIPTION
The CAT28C257 is a fast, low power, 5V-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 Catalyst’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.
BLOCK DIAGRAM
© 2004 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
Doc. No. 1015, Rev. D
ALO
GEN FR
TM
LEAD FREE


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