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FM24C32U – 32K-Bit Standard 2-Wire Bus Interface Serial EEPROM
September 2002
FM24C32U – 32K-Bit Standard 2-Wire Bus
Interface Serial EEPROM
General Description
FM24C32U is a 32Kbit CMOS non-volatile serial EEPROM orga-
nized as 4K x 8 bit memory. This device confirms to Extended IIC
2-wire protocol that allows accessing of memory in excess of
16Kbit on an IIC bus. This serial communication protocol uses a
Clock signal (SCL) and a Data signal (SDA) to synchronously
clock data between a master (e.g. a microcontroller) and a slave
(EEPROM). FM24C32U is designed to minimize pin count and
simplify PC board layout requirements.
FM24C32U offers hardware write protection where by the upper
half (upper 16Kbit) of the memory array can be write protected by
connecting WP pin to V
CC
. This section of memory then becomes
unalterable until the WP pin is switched to V
SS
.
“LZ” and “L” versions of FM24C32U offer very low standby current
making them suitable for low power applications. This device is
offered in both SO and DIP packages.
Fairchild EEPROMs are designed and tested for applications
requiring high endurance, high reliability and low power consump-
tion.
Features
I
Extended operating voltage: 2.7V to 5.5V
I
Up to 400 KHz clock frequency at 2.7V to 5.5V
I
Low power consumption
— 0.2mA active current typical
— 10µA standby current typical
— 1µA standby current typical (L version)
— 0.1µA standby current typical (LZ version)
I
Schmitt trigger inputs
I
32 byte page write mode
I
Self timed write cycle (6ms typical)
I
Hardware Write Protection for upper half of the array
I
Low V
CC
programming lockout for V
CC
= 5V±10% (“H” option)
— Internal ERASE/WRITE logic is disabled if V
CC
is below 3.8V
I
Endurance: 1 Million data changes
I
Data Retention: Greater than 40 years
I
Packages: 8-Pin DIP and 8-Pin SO
I
Temperature range
— Commercial: 0°C to +70°C
— Industrial (V): -40°C to +85°C
— Automotive (E): -40°C to +125°C
Block Diagram
VSS
VCC
WP
SDA
START
STOP
LOGIC
CONTROL
LOGIC
SLAVE ADDRESS
REGISTER &
COMPARATOR
E2PROM
ARRAY
WRITE
LOCKOUT
H.V. GENERATION
TIMING &CONTROL
SCL
XDEC
A2
A1
A0
WORD
ADDRESS
COUNTER
R/W
YDEC
CK
DIN
DATA REGISTER
DOUT
© 2001 Fairchild Semiconductor Corporation
FM24C32U Rev. A.1
1
www.fairchildsemi.com
FM24C32U – 32K-Bit Standard 2-Wire Bus Interface Serial EEPROM
Connection Diagram
Dual-in-Line Package (N) and SO Package (M8)
A0
A1
A2
V
SS
1
2
8
7
V
CC
WP
SCL
SDA
FM24C32U
3
4
6
5
See Package Number N08E and M08A
Pin Names
V
SS
SDA
SCL
WP
V
CC
Ground
Serial Data I/O
Serial Clock Input
Write Protect
Power Supply
2
FM24C32U Rev. A.1
www.fairchildsemi.com
FM24C32U – 32K-Bit Standard 2-Wire Bus Interface Serial EEPROM
Ordering Information
FM
24
C
XX
U
F
T
LZ
E
XXX
Package
Letter
N
M8
None
V
E
Blank
H
L
LZ
Description
8-pin DIP
8-pin SOIC
0 to 70°C
-40 to +125°C
-40 to +85°C
4.5V to 5.5V
4.5V to 5.5V and V
CC
Lockout
2.7V to 5.5V
2.7V to 5.5V and
<1µA Standby Current
Normal Pin Out
Rotated Die Pin Out
100KHz
400KHz
Ultralite Process
Temp. Range
Voltage Operating Range
Blank
T
SCL Clock Frequency
Blank
F
U
Process
Density
32
C
32K with Write Protect
CMOS Technology
IIC
Fairchild Non-Volatile
Memory
Interface
24
FM
3
FM24C32U Rev. A.1
www.fairchildsemi.com
FM24C32U – 32K-Bit Standard 2-Wire Bus Interface Serial EEPROM
Product Specifications
Absolute Maximum Ratings
Ambient Storage Temperature
All Input or Output Voltages
with Respect to Ground
Lead Temperature
(Soldering, 10 seconds)
ESD Rating
–65°C to +150°C
6.5V to –0.3V
+300°C
2000V min.
Operating Conditions
Ambient Operating Temperature
FM24C32U
FM24C32UE
FM24C32UV
Positive Power Supply
FM24C32U/FM24C32UH
FM24C32UL
FM24C32ULZ
0°C to +70°C
-40°C to +85°C
-40°C to +125°C
4.5V to 5.5V
2.7V to 5.5V
2.7V to 5.5V
Standard V
CC
(4.5V to 5.5V) DC Electrical Characteristics
Symbol
Parameter
Test Conditions
Min
I
CCA
I
SB
I
LI
I
LO
V
IL
V
IH
V
OL
Active Power Supply
Current
Standby Current
Input Leakage Current
Output Leakage Current
Input Low Voltage
Input High Voltage
Output Low Voltage
I
OL
= 3 mA
f
SCL
= 400 KHz
f
SCL
= 100 KHz
V
IN
= GND or V
CC
V
IN
= GND A
0
, A
1
, A
2
, WP
to V
CC
SCL
V
OUT
= GND to V
CC
–0.3
V
CC
x 0.7
Limits
Typ
(Note 1)
0.2
10
0.1
0.5
0.1
Units
Max
1.0
50
1
2
1
V
CC
x 0.3
V
CC
+ 0.5
0.4
mA
µA
µA
µA
µA
V
V
V
Low V
CC
(2.7V to 5 .5V) DC Electrical Characteristics
Symbol
Parameter
Test Conditions
Min
I
CCA
I
SB
(Note 3)
I
LI
I
LO
V
IL
V
IH
V
OL
Active Power Supply Current f
SCL
= 400 KHz
f
SCL
= 100 KHz
Standby Current
V
IN
= GND
or V
CC
V
IN
= GND
to V
CC
V
CC
= 2.7V - 4.5V (L)
V
CC
= 2.7V - 4.5V (LZ)
V
CC
= 4.5V - 5.5V
A
0
, A
1
, A
2
, WP
SCL
Limits
Typ
(Note 1)
0.2
1
0.1
10
0.1
0.5
0.1
Units
Max
1.0
10
1
50
1
2
1
V
CC
x 0.3
V
CC
+ 0.5
0.4
mA
µA
µA
µA
µA
µA
µA
V
V
V
Input Leakage Current
Output Leakage Current
Input Low Voltage
Input High Voltage
Output Low Voltage
V
OUT
= GND to V
CC
–0.3
V
CC
x 0.7
I
OL
= 3 mA
Capacitance
T
A
= +25°C, f = 100/400 KHz, V
CC
= 5V
(Note 2)
Symbol
C
I/O
C
IN
Test
Input/Output Capacitance (SDA)
Input Capacitance (A0, A1, A2, SCL)
Conditions
V
I/O
= 0V
V
IN
= 0V
Max
8
6
Units
pF
pF
Note 1:
Typical values are T
A
= 25°C and nominal supply voltage (5V).
Note 2:
This parameter is periodically sampled and not 100% tested.
Note 3:
The "L" and "LZ" versions can be operated in the 2.7V to 5.5V V
CC
range. However the I
SB
values for L and LZ are applicable only when V
CC
is in the 2.7V to 4.5V range.
4
FM24C32U Rev. A.1
www.fairchildsemi.com
电源技术
