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CAT25C256XAT3

Description
64K 8K x 8 Battery-Voltage CMOS E2PROM
Categoryaccessories   
File Size442KB,12 Pages
ManufacturerCatalyst
Websitehttp://www.catalyst-semiconductor.com/
Download Datasheet View All

CAT25C256XAT3 Overview

64K 8K x 8 Battery-Voltage CMOS E2PROM

CAT25C128/256
CAT25C128/256
128K/256K-Bit SPI Serial CMOS EEPROM
FEATURES
I
5 MHz SPI Compatible
I
1.8 to 5.5 Volt Operation
I
Hardware and Software Protection
I
Low Power CMOS Technology
I
SPI Modes (0,0 &1,1)
I
Industrial and Automotive
I
Self-Timed Write Cycle
I
64-Byte Page Write Buffer
I
Block Write Protection
– Protect 1/4, 1/2 or all of EEPROM Array
I
100,000 Program/Erase Cycles
I
100 Year Data Retention
I
RoHS-compliant packages
Temperature Ranges
DESCRIPTION
The CAT25C128/256 is a 128K/256K-Bit SPI Serial
CMOS EEPROM internally organized as 16Kx8/32Kx8
bits. Catalyst’s advanced CMOS Technology
substantially reduces device power requirements. The
CAT25C128/256 features a 64-byte page write buffer.
The device operates via the SPI bus serial interface
and is enabled through a Chip Select (CS). In addition
to the Chip Select, the clock input (SCK), data in (SI)
and data out (SO) are required to access the device.
The
HOLD
pin may be used to suspend any serial
communication without resetting the serial sequence.
The CAT25C128/256 is designed with software and
hardware write protection features including Block Lock
protection. The device is available in 8-pin DIP, 8-pin
SOIC, 14-pin TSSOP and 20-pin TSSOP packages.
PIN CONFIGURATION
SOIC Package
(V**, X)
CS
SO
WP
VSS
1
2
3
4
8
7
6
5
VCC
HOLD
SCK
SI
BLOCK DIAGRAM
1
2
3
4
5
6
7
14
13
12
11
10
9
8
TSSOP Package (Y14)**
CS
SO
NC
NC
NC
WP
VSS
V CC
HOLD
NC
NC
NC
SCK
SI
SENSE AMPS
SHIFT REGISTERS
WORD ADDRESS
BUFFERS
COLUMN
DECODERS
DIP Package (L)
CS
SO
WP
SS
1
2
3
4
8
7
6
5
VCC
HOLD
SCK
SI
TSSOP Package (Y20)**
NC
CS
SO
SO
NC
NC
WP
VSS
NC
NC
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
**CAT25C128 only.
NC
V CC
HOLD
HOLD
NC
NC
SCK
SI
NC
NC
SO
SI
CS
WP
HOLD
SCK
I/O
CONTROL
SPI
CONTROL
LOGIC
BLOCK
PROTECT
LOGIC
CONTROL LOGIC
XDEC
EE PROM
ARRAY
PIN FUNCTIONS
Pin Name
SO
SCK
WP
V
CC
V
SS
CS
SI
HOLD
NC
Function
Serial data Output
Serial Clock
Write Protect
Power Supply
Ground
Chip Select
Serial Data Input
Suspends Serial Input
No Connect
DATA IN
STORAGE
HIGH VOLTAGE/
TIMING CONTROL
STATUS
REGISTER
For Ordering Information details, see page 11.
© 2005 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
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