H
EE
GEN FR
ALO
CAT25C32/64
32K/64K-Bit SPI Serial CMOS EEPROM
LE
FEATURES
A D F R E ETM
■ 1,000,000 program/erase cycles
■ 10 MHz SPI compatible
■ 100 year data tetention
■ 1.8 to 6.0 volt operation
■ Self-timed write cycle
■ Hardware and software protection
■ 8-pin DIP/SOIC, 14-pin TSSOP and 20-pin
■ Low power CMOS technology
TSSOP
■ SPI modes (0,0 &1,1)
■ 64-Byte page write buffer
■ Commercial, industrial and automotive
■ Block write protection
temperature ranges
– Protect 1/4, 1/2 or all of EEPROM array
DESCRIPTION
The CAT25C32/64 is a 32K/64K-Bit SPI Serial CMOS
EEPROM 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
DIP Package (P, L)
CS
SO
WP
VSS
1
2
3
8
7
6
4
5
SOIC Package (S, V)
VCC
HOLD
SCK
SI
CS
SO
WP
VSS
1
2
3
4
8
7
6
5
VCC
HOLD
SCK
SI
TSSOP Package (U14, Y14)
CS
SO
NC
NC
NC
WP
VSS
1
2
3
4
5
6
7
14
13
12
11
10
9
8
VCC
HOLD
NC
NC
NC
SCK
SI
BLOCK DIAGRAM
TSSOP Package (U20, 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
NC
VCC
HOLD
HOLD
NC
NC
SCK
SI
NC
NC
SENSE AMPS
SHIFT REGISTERS
WORD ADDRESS
BUFFERS
CS
WP
HOLD
SCK
I/O
CONTROL
SPI
CONTROL
LOGIC
BLOCK
PROTECT
LOGIC
PIN FUNCTIONS
Pin Name
CONTROL LOGIC
SO
SI
COLUMN
DECODERS
XDEC
E2PROM
ARRAY
DATA IN
STORAGE
HIGH VOLTAGE/
TIMING CONTROL
STATUS
REGISTER
© 2004 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
Function
SO
Serial Data Output
SCK
Serial Clock
WP
Write Protect
VCC
+1.8V to +6.0V Power Supply
VSS
Ground
CS
Chip Select
SI
Serial Data Input
HOLD
Suspends Serial Input
NC
No Connect
Doc No. 1001, Rev. G
CAT25C32/64
ABSOLUTE MAXIMUM RATINGS*
*COMMENT
Temperature Under Bias ................. –55°C to +125°C
Stresses above those listed under “Absolute Maximum
Ratings” may cause permanent damage to the device.
These are stress ratings only, and functional operation
of the device at these or any other conditions outside of
those listed in the operational sections of this specification is not implied. Exposure to any absolute maximum
rating for extended periods may affect device performance and reliability.
Storage Temperature ....................... –65°C to +150°C
Voltage on any Pin with
Respect to VSS1) ................... –2.0V to +VCC +2.0V
VCC with Respect to VSS ................................ –2.0V to +7.0V
Package Power Dissipation
Capability (Ta = 25°C) ................................... 1.0W
Lead Soldering Temperature (10 secs) ............ 300°C
Output Short Circuit Current(2) ........................ 100 mA
RELIABILITY CHARACTERISTICS
Symbol
NEND
(3)
Parameter
Min.
Endurance
Max.
Units
1,000,000
Cycles/Byte
TDR(3)
Data Retention
100
Years
VZAP(3)
ESD Susceptibility
2000
Volts
ILTH(3)(4)
Latch-Up
100
mA
D.C. OPERATING CHARACTERISTICS
VCC = +1.8V to +6.0V, unless otherwise specified.
Limits
Symbol
Parameter
Min.
Typ.
Max.
Units
Test Conditions
ICC1
Power Supply Current
(Operating Write)
10
mA
VCC = 5V @ 10MHz
SO=open; CS=Vss
ICC2
Power Supply Current
(Operating Read)
2
mA
VCC = 5.0V
FCLK = 10MHz
ISB(5)
Power Supply Current
(Standby)
1
µA
CS = VCC
VIN = VSS or VCC
ILI
Input Leakage Current
2
µA
ILO
Output Leakage Current
3
µA
VIL(3)
Input Low Voltage
-1
VCC x 0.3
V
VIH(3)
Input High Voltage
VCC x 0.7
VCC + 0.5
V
VOL1
Output Low Voltage
0.4
V
VOH1
Output High Voltage
VOL2
Output Low Voltage
VOH2
Output High Voltage
VCC - 0.8
V
0.2
VCC-0.2
VOUT = 0V to VCC,
CS = 0V
4.5V≤VCC
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