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CAT25C256XI

更新时间： 2024-11-06 12:58:19
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CATALYST 可编程只读存储器
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CAT25C256XI 数据手册

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CAT25C128/256  
128K/256K-Bit SPI Serial CMOS E2PROM  
FEATURES  
■ 100,000 Program/Erase Cycles  
■ 100 Year Data Retention  
■ Self-Timed Write Cycle  
■ 5 MHz SPI Compatible  
■ 1.8 to 6.0 Volt Operation  
■ Hardware and Software Protection  
■ Zero Standby Current  
■ 8-Pin DIP/SOIC, 16-Pin SOIC, 14-Pin TSSOP  
and 20-Pin TSSOP  
■ Low Power CMOS Technology  
■ SPI Modes (0,0 &1,1)  
■ 64-Byte Page Write Buffer  
■ Block Write Protection  
■ Commercial, Industrial and Automotive  
– Protect 1/4, 1/2 or all of E2PROM Array  
Temperature Ranges  
DESCRIPTION  
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 pro-  
tection features including Block Lock protection. The  
device is available in 8-pin DIP, 8-pin SOIC, 16-pin  
SOIC, 14-pin TSSOP and 20-pin TSSOP packages.  
The CAT25C128/256 is a 128K/256K-Bit SPI Serial  
CMOS E2PROM internally organized as 16Kx8/32Kx8  
bits. Catalyst’s advanced CMOS Technology substan-  
tially 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 though a Chip Select (CS). In addition to the  
Chip Select, the clock input (SCK), data in (SI) and data  
PIN CONFIGURATION  
SOIC Package (S, K) TSSOP Package (U14)  
BLOCK DIAGRAM  
DIP Package (P)  
14  
13  
12  
11  
10  
9
8
SENSE AMPS  
SHIFT REGISTERS  
1
2
3
4
5
6
7
VCC  
HOLD  
NC  
NC  
NC  
CS  
SO  
NC  
NC  
NC  
WP  
1
2
3
4
8
7
6
5
V
CS  
SO  
WP  
CC  
1
2
3
4
8
7
6
5
V
CS  
SO  
CC  
HOLD  
SCK  
SI  
HOLD  
SCK  
SI  
WP  
V
SS  
COLUMN  
DECODERS  
V
SS  
WORD ADDRESS  
BUFFERS  
SCK  
SI  
V
SS  
SOIC Package (S16)  
16  
1
2
3
4
5
6
7
8
VCC  
HOLD  
NC  
CS  
SO  
TSSOP Package (U20)  
SO  
SI  
I/O  
CONTROL  
15  
14  
13  
12  
11  
10  
9
1
NC  
NC  
CS  
SO  
SO  
NC  
NC  
WP  
20  
19  
18  
17  
16  
15  
NC  
NC  
NC  
NC  
WP  
VSS  
VCC  
HOLD  
HOLD  
NC  
E2PROM  
ARRAY  
2
CS  
NC  
SPI  
CONTROL  
LOGIC  
XDEC  
3
WP  
NC  
4
HOLD  
SCK  
5
NC  
6
NC  
SCK  
SI  
7
14 SCK  
13 SI  
BLOCK  
PROTECT  
LOGIC  
V
8
SS  
NC  
9
12 NC  
11 NC  
10  
NC  
PIN FUNCTIONS  
DATA IN  
STORAGE  
Pin Name  
SO  
Function  
Serial Data Output  
HIGH VOLTAGE/  
TIMING CONTROL  
SCK  
WP  
Serial Clock  
STATUS  
REGISTER  
Write Protect  
25C128 F02  
VCC  
+1.8V to +6.0V Power Supply  
Ground  
VSS  
CS  
Chip Select  
SI  
Serial Data Input  
Suspends Serial Input  
HOLD  
NC  
No Connect  
Note: CAT25C256 not available in 8-Lead S or U packages.  
Doc. No. 25088-00 1/01  
© 2001 by Catalyst Semiconductor, Inc.  
Characteristics subject to change without notice  
1
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