CAT24FC32A
32K-Bit Fast Mode I
2
C Serial CMOS EEPROM
FEATURES
I
Fast mode I
2
C bus compatible*
I
Max clock frequency:
H
GEN
FR
ALO
EE
LE
A
D
F
R
E
E
TM
I
Output slope control to eliminate ground
bounce
I
Zero standby current
I
Industrial temperature range
I
1,000,000 program/erase cycles
I
100 years data retention
400 kHz for V
CC
=1.8V to 3.6V
I
Hardware write protect for entire array
I
Cascadable for up to eight devices
I
32-Byte page or byte write modes
I
Self-timed write cycle with autoclear
I
5 ms max write cycle time
I
Random and sequential read modes
I
Schmitt trigger and spike suppression at SDA
I
8-pin PDIP, 8-pin SOIC (150 and 200 mil) and
8-pin TSSOP packages
I
"Green" package options available
and SCL inputs
DESCRIPTION
The CAT24FC32A is a 32K-bit Serial CMOS EEPROM
internally organized as 4Kx8 bits. The device is
compatible with Fast-mode I
2
C bus specification and
operates down to 1.8V with a bit rate up to 400 kbit/s.
Extended addressing capability allows up to 8 devices
to share the same bus. Catalyst's advanced CMOS
technology substantially reduces device power
PIN CONFIGURATION
DIP Package (P, L)
A0
A1
A2
VSS
1
2
3
4
8
7
6
5
SOIC Package (J,W) (K, X)
A0
A1
A2
VSS
1
2
3
4
8
7
6
5
VCC
WP
SCL
SDA
i
D
c
s
VCC
WP
SCL
SDA
A0
A1
A2
VSS
TSSOP Package (U, Y)
1
2
3
4
i
t
n
o
8
7
6
5
u
n
VCC
WP
SCL
SDA
VCC
VSS
SDA
WP
requirements. The device is optimized for high
performance applications, where low power, low voltage
and high speed operation are required.
CAT24FC32A is available in 8-pin DIP, 8-pin SOIC
(JEDEC and EIAJ) and 8-pin TSSOP packages.
d
e
a
P
t
r
BLOCK DIAGRAM
EXTERNAL LOAD
DOUT
ACK
SENSE AMPS
SHIFT REGISTERS
WORD ADDRESS
BUFFERS
COLUMN
DECODERS
256
START/STOP
LOGIC
XDEC
CONTROL
LOGIC
128
EEPROM
128 X 256
DATA IN STORAGE
HIGH VOLTAGE/
TIMING CONTROL
SCL
A0
A1
A2
STATE COUNTERS
SLAVE
ADDRESS
COMPARATORS
* Catalyst Semiconductor is licensed by Philips Corporation to carry the I
2
C Bus Protocol.
© 2004 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
1
Doc. No. 1048, Rev. E
CAT24FC32A
PIN FUNCTIONS
Pin Name
A0, A1, A2
SDA
SCL
WP
V
CC
V
SS
Function
Device Address Inputs
Serial Data/Address
Serial Clock
Write Protect
Power Supply
Ground
ABSOLUTE MAXIMUM RATINGS*
Temperature Under Bias ................. –55°C to +125°C
Storage Temperature ....................... –65°C to +150°C
Voltage on Any Pin with
Respect to Ground
(1)
........... –2.0V to +V
CC
+ 2.0V
V
CC
with Respect to Ground ............... –2.0V to +7.0V
Package Power Dissipation
Capability (T
A
= 25°C) ................................... 1.0W
Lead Soldering Temperature (10 secs) ............ 300°C
Output Short Circuit Current
(2)
........................ 100mA
RELIABILITY CHARACTERISTICS
Symbol
N
END(3)
T
DR(3)
V
ZAP(3)
I
LTH(3)(4)
Parameter
Endurance
Data Retention
ESD Susceptibility
Latch-up
*COMMENT
RECOMMENDED OPERATING CONDITIONS
Temperature Range
Industrial
Supply Voltage Range
1.8V to 3.6V
Note:
(1) The minimum DC input voltage is –0.5V. During transitions, inputs may undershoot to –2.0V for periods of less than 20 ns. Maximum DC
voltage on output pins is V
CC
+0.5V, which may overshoot to V
CC
+ 2.0V for periods of less than 20ns.
(2) Output shorted for no more than one second. No more than one output shorted at a time.
(3) This parameter is tested initially and after a design or process change that affects the parameter.
(4) Latch-up protection is provided for stresses up to 100 mA on address and data pins from –1V to V
CC
+1V.
i
D
c
s
Minimum
-40˚C
i
t
n
o
Min.
100
Max.
1,000,000
2000
100
Maximum
+85˚C
u
n
Units
Years
Volts
mA
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.
d
e
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Reference Test Method
MIL-STD-883, Test Method 1033
MIL-STD-883, Test Method 1008
MIL-STD-883, Test Method 3015
JEDEC Standard 17
Cycles/Byte
Device
CAT24FC32A
Doc. No. 1048, Rev. E
2
CAT24FC32A
D.C. OPERATING CHARACTERISTICS
Over recommended operating conditions, unless otherwise specified
Symbol
I
LI
I
LO
I
CC1
I
CC2
I
SB(1)
V
IL(2)
V
IH(2)
V
OL1
V
OL2
Parameter
Input Leakage Current
(4)
Output Leakage Current
(4)
Power Supply Current
(Operating Write)
Power Supply Current
(Operating Read)
Standby Current
Input Low Voltage
Input High Voltage
Output Low Voltage
Output Low Voltage
-0.5
0.7V
CC
0
0.3V
CC
V
CC
+ 0.5
0.4
µA
V
V
400
µA
Min.
-10
-10
Typ.
Max.
10
10
3
Units
µA
µA
mA
Test Conditions
V
IN
= GND to V
CC
V
IN
= GND to V
CC
f
SCL
= 400kHz
V
CC
= 3.6V
f
SCL
= 400kHz
CAPACITANCE
T
A
= 25°C, f = 1.0 MHz, V
CC
= 3.6V
Symbol
C
I/O(3)
C
IN(3)
Test
Input/Output Capacitance (SDA)
Input Capacitance (A0, A1, A2, SCL, WP)
Note:
(1) Standby current, I
SB
< 900 nA; A0, A1, A2, WP connected to GND; SCL, SDA = GND or VCC.
(2) V
IL
min and V
IH
max are reference values only and are not tested.
(3) This parameter is characterized initially and after a design or process change that affects the parameter. Not 100% tested.
(4) I/O pins, SDA and SCL do not obstruct the bus lines if V
CC
is switched off.
i
D
c
s
i
t
n
o
u
n
Max.
8
6
0.2V
CC
d
e
V
V
Units
pF
pF
a
P
V
CC
= 3.6V
V
CC
= 3.6V
I
OL
= 3.0 mA
I
OL
= 3 mA
V
IN
= GND or V
CC
t
r
2.5V
≤
V
CC
≤
3.6V
1.8V
≤
V
CC
< 2.5V
Conditions
V
I/O
= 0V
V
IN
= 0V
3
Doc. No. 1048, Rev. E
CAT24FC32A
A.C. CHARACTERISTICS
Over recommended operating conditions, unless otherwise specified (Note 1).
VCC=1.8V - 3.6V
Symbol
f
SCL
t
SP
t
LOW
t
HIGH
t
R(2)
t
F(2)
t
HD:STA
t
SU:STA
t
HD:DAT
t
SU:DAT
t
SU:STO
t
SU:WP
t
HD:WP
t
AA
t
DH
t
BUF(2)
t
OF(2)
Parameter
Clock Frequency
Input Filter Spike Suppression (SDA, SCL)
Clock Low Period
Clock High Period
SDA and SCL Rise Time
SDA and SCL Fall Time
Start Condition Hold Time
Start Condition Setup Time (for a
Repeated Start)
Data Input Hold Time
Data In Setup Time
1.3
0.6
20
20
0.6
0.6
Min
Typ
Max
400
50
Units
kHz
ns
µs
Stop Condition Setup Time
WP Setup Time
WP Hold Time
SCL Low to Data Out Valid
Data Out Hold Time
t
WC(3)
Power-Up Timing
(2)(4)
Symbol
t
PUR
t
PUW
i
D
Time the Bus must be Free Before a New
Transmission Can Start
Output Fall Time from V
IH
min to V
IL
max
Write Cycle Time (Byte or Page)
c
s
i
t
n
o
u
n
0
100
0.6
0
2.5
50
1.3
20
Min
d
e
a
P
300
300
900
µs
ns
ns
t
r
µs
µs
ns
ns
µs
µs
µs
ns
ns
µs
250
5
ns
ms
Parameter
Power-Up to Read Operation
Power-Up to Write Operation
Typ
Max
1
1
Units
ms
ms
Note:
(1) Test Conditions according to "AC Test Conditions" Table.
(2) This parameter is characterized initially and after a design or process change that affects the parameter. Not 100% tested.
(3) The write cycle time is the time from a valid stop condition of a write sequence to the end of the internal program/erase cycle. During the
write cycle, the bus interface circuits are disabled, SDA is allowed to remain high and the device does not respond to its slave address.
(4) t
PUR
and t
PUW
are the delays required from the time V
CC
is stable until the specified operation can be initiated.
Doc. No. 1048, Rev. E
4
CAT24FC32A
AC TEST CONDITIONS
Input pulse voltages
Input rise and fall times
Input reference voltages
Output reference voltages
Output load
0.2V
CC
to 0.8V
CC
≤
50 ns
0.3V
CC
, 0.7V
CC
0.5V
CC
Current source: I
OL
= 3mA;
CL: 400pF for f
SCl
max = 400kHz / 100pF for f
SCL
max = 1 MHz
Figure 1. Bus Timing
tF
tLOW
SCL
tSU:STA
tHD:STA
tHD:DAT
tSU:DAT
tHIGH
tLOW
tR
SDA IN
tAA
SDA OUT
Figure 2. WP Timing
2nd Byte Address
1
SCL
8
SDA
Figure 3. Write Cycle Timing
SCL
i
D
c
s
A7
WP
i
t
n
o
A0
ACK
9
u
n
tDH
d
e
Data
8
D0
a
P
tSU:STO
tBUF
t
r
1
D7
tSU:WP
tHD:WP
SDA
8TH BIT
BYTE n
tWR
STOP
CONDITION
START
CONDITION
ADDRESS
5
Doc. No. 1048, Rev. E
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