FM24C32U Datasheet, PDF (1/13 Pages) Fairchild Semiconductor – 32K-Bit Standard 2-Wire Bus Interface Serial EEPROM

FM24C32U – 32K-Bit Standard 2-Wire Bus
Interface Serial EEPROM
September 2002
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
SCL
A2
A1
A0
WRITE
LOCKOUT
START
STOP
LOGIC
SLAVE ADDRESS
REGISTER &
COMPARATOR
CONTROL
LOGIC
WORD
ADDRESS
COUNTER
XDEC
H.V. GENERATION
TIMING &CONTROL
E2PROM
ARRAY
R/W
YDEC
CK
DIN
DATA REGISTER
DOUT
© 2001 Fairchild Semiconductor Corporation
1
FM24C32U Rev. A.1
www.fairchildsemi.com