1
CAT25C01/02/04/08/16
1K/2K/4K/8K/16K SPI Serial CMOS E
2
PROM
FEATURES
a73 10 MHz SPI Compatible
a73 1.8 to 6.0 Volt Operation
a73 Hardware and Software Protection
a73 Zero Standby Current
a73 Low Power CMOS Technology
a73 SPI Modes (0,0 & 1,1)
a73 Commercial, Industrial and Automotive
Temperature Ranges
a73 1,000,000 Program/Erase Cycles
a73 100 Year Data Retention
a73 Self-Timed Write Cycle
a73 8-Pin DIP/SOIC, 8/14-Pin TSSOP and 8-Pin MSOP
a73 16/32-Byte Page Write Buffer
a73 Block Write Protection
– Protect 1/4, 1/2 or all of E
2
PROM Array
PIN CONFIGURATION
DIP Package (P)
PIN FUNCTIONS
Pin Name Function
SO Serial Data Output
SCK Serial Clock
WP Write Protect
V
CC
+1.8V to +6.0V Power Supply
V
SS
Ground
CS Chip Select
SI Serial Data Input
HOLD Suspends Serial Input
NC No Connect
BLOCK DIAGRAM
© 1999 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
Advanced Information
DESCRIPTION
The CAT25C01/02/04/08/16 is a 1K/2K/4K/8K/16K Bit
SPI Serial CMOS E
2
PROM internally organized as
128x8/256x8/512x8/1024x8/2048x8 bits. Catalyst’s ad-
vanced CMOS Technology substantially reduces de-
vice power requirements. The CAT25C01/02/04 fea-
tures a 16-byte page write buffer. The 25C08/16 fea-
tures a 32-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 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 CAT25C01/02/04/08/16 is de-
signed with software and hardware write protection
features including Block Write protection. The device is
available in 8-pin DIP, 8-pin SOIC, 8-pin MSOP and 8/
14-pin TSSOP packages.
TSSOP Package (U14)
SENSE AMPS
SHIFT REGISTERS
SPI
CONTROL
LOGIC
WORD ADDRESS
BUFFERS
I/O
CONTROL
E
2
PROM
ARRAY
COLUMN
DECODERS
XDEC
HIGH VOLTAGE/
TIMING CONTROL
SO
25C128 F02
STATUS
REGISTER
BLOCK
PROTECT
LOGIC
CONTR
OL LOGIC
DATA IN
STORAGE
SI
CS
WP
HOLD
SCK
SOIC Package (S)
V
SS
SO
WP
V
CC
HOLD
SCK
SI
1
2
3
4
8
7
6
5
CS
SO
WP
CS VCC
SCK
SI
1
2
3
4
8
7
6
5V
SS
HOLD
CS
WP
HOLD
VCC
NC
NC
NC NC
SO
NC
NC
V
SS
SCK
SI
1
2
3
4
5
6
7 8
9
10
11
12
13
14
Doc. No. 25067-00 5/00
TSSOP Package (U)
8
7
6
5
V
CC
WP SCL
CS
V
SS
1
2
3
4
SO
HOLD
SI
SO
WP
CS V
CC
SCK
SI
1
2
3
4
8
7
6
5
V
SS
HOLD
MSOP Package (R)*
*CAT 25C01/02 only