CAT25C32 Datasheet, PDF (1/9 Pages) Catalyst Semiconductor – 32K/64K-Bit SPI Serial CMOS E2PROM

Advanced Information
CAT25C32/64
32K/64K-Bit SPI Serial CMOS E²PROM
FEATURES
s 10 MHz SPI Compatible
s 1.8 to 6.0 Volt Operation
s Hardware and Software Protection
s Zero Standby Current
s Low Power CMOS Technology
s SPI Modes (0,0 &1,1)
s Commercial, Industrial and Automotive
Temperature Ranges
DESCRIPTION
s 1,000,000 Program/Erase Cycles
s 100 Year Data Retention
s Self-Timed Write Cycle
s 8-Pin DIP/SOIC, 16-Pin SOIC, 14-Pin TSSOPand
20-Pin TSSOP
s 64-Byte Page Write Buffer
s Block Write Protection
– Protect 1/4, 1/2 or all of E²PROM Array
The CAT25C32/64 is a 32K/64K-Bit SPI Serial CMOS
E²PROM internally organized as 4Kx8/8Kx8 bits.
Catalyst’s advanced CMOS Technology substantially
reduces device power requirements. The CAT25C32/
64 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 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 CAT25C32/64 is
designed with software and hardware write protection
features including Block write protection. The device is
available in 8-pin DIP, 8-pin SOIC, 14-pin TSSOP and
20-pin TSSOP packages.
PIN CONFIGURATION
BLOCK DIAGRAM
SOIC Package (S) TSSOP Package (U14) TSSOP Package (U20)
CS ¹
SO ²
WP ³
VSS 4
8
7
VCC
CS
SO
1
2
HOLD _{NC 3}
6 SCK _{NC 4}
5
SI
NC 5
WP 6
V_{SS 7}
DIP Package (P)
CS ¹
SO 2
WP 3
VSS 4
8 VCC
7 HOLD
6 SCK
5 SI
14 VCC
13 HOLD
12 NC
11 NC
10 NC
9 SCK
8 SI
NC 1
CS 2
SO 3
SO 4
NC 5
NC 6
WP 7
V_{SS 8}
NC 9
NC 10
PIN FUNCTIONS
Pin Name
Function
SO
SCK
WP
Serial Data Output
Serial Clock
Write Protect
VCC
+1.8V to +6.0V Power Supply
VSS
Ground
CS
Chip Select
20 NC
19 VCC
18 HOLD
17 HOLD
16 NC
15 NC
14 SCK
13 SI
12 NC _SO
11 NC
SI
CS
WP
HOLD
SCK
SENSE AMPS
SHIFT REGISTERS
WORD ADDRESS
BUFFERS
COLUMN
DECODERS
I/O
CONTROL
SPI
CONTROL
LOGIC
BLOCK
PROTECT
LOGIC
STATUS
REGISTER
XDEC
E²PROM
ARRAY
DATA IN
STORAGE
HIGH VOLTAGE/
TIMING CONTROL
SI
HOLD
Serial Data Input
Suspends Serial Input
NC
No Connect
© 1999 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
Doc No. 25087-00 8/99 SPI-1