FM24C32U – 32K-Bit Standard 2-Wire Bus
Interface Serial EEPROM
General Description
Features
FM24C32U is a 32Kbit CMOS non-volatile serial EEPROM organized 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.
■ Extended operating voltage: 2.7V to 5.5V
■ Up to 400 KHz clock frequency at 2.7V to 5.5V
■ 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)
■ Schmitt trigger inputs
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 VCC. This section of memory then becomes
unalterable until the WP pin is switched to VSS.
■ 32 byte page write mode
■ Self timed write cycle (6ms typical)
■ Hardware Write Protection for upper half of the array
■ Low VCC programming lockout for VCC = 5V±10% (“H” option)
— Internal ERASE/WRITE logic is disabled if VCC is below 3.8V
“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.
■ Endurance: 1 Million data changes
■ Data Retention: Greater than 40 years
Fairchild EEPROMs are designed and tested for applications
requiring high endurance, high reliability and low power consumption.
■ Packages: 8-Pin DIP and 8-Pin SO
■ 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
WRITE
LOCKOUT
VCC
H.V. GENERATION
TIMING &CONTROL
WP
START
STOP
LOGIC
SDA
CONTROL
LOGIC
SLAVE ADDRESS
REGISTER &
COMPARATOR
SCL
XDEC
A2
A1
A0
E2PROM
ARRAY
WORD
ADDRESS
COUNTER
R/W
YDEC
CK
DATA REGISTER
DIN
© 2001 Fairchild Semiconductor Corporation
FM24C32U Rev. A.1
1
DOUT
www.fairchildsemi.com
FM24C32U – 32K-Bit Standard 2-Wire Bus Interface Serial EEPROM
September 2002
FM24C32U – 32K-Bit Standard 2-Wire Bus Interface Serial EEPROM
Connection Diagram
Dual-in-Line Package (N) and SO Package (M8)
A0
1
A1
2
8
VCC
7
WP
FM24C32U
A2
3
6
SCL
VSS
4
5
SDA
See Package Number N08E and M08A
Pin Names
VSS
Ground
SDA
Serial Data I/O
SCL
Serial Clock Input
WP
Write Protect
VCC
Power Supply
2
FM24C32U Rev. A.1
www.fairchildsemi.com
FM
24
C
XX
U
F
T
LZ
E
XXX
Letter
Description
N
M8
8-pin DIP
8-pin SOIC
Temp. Range
None
V
E
0 to 70°C
-40 to +125°C
-40 to +85°C
Voltage Operating Range
Blank
H
4.5V to 5.5V
4.5V to 5.5V and VCC
Lockout
2.7V to 5.5V
2.7V to 5.5V and
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