FM24C64A
2-Wire Serial EEPROM
Data Sheet
Apr. 2013
Data Sheet
FM24C64A 2-Wire Serial EEPROM
Ver 1.1
1
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Trademarks
Shanghai Fudan Microelectronics Group Co., Ltd name and logo, the “复旦” logo are trademarks or registered trademarks of
Shanghai Fudan Microelectronics Group Co., Ltd or its subsidiaries in China.
Shanghai Fudan Microelectronics Group Co., Ltd, Printed in the China, All Rights Reserved.
FM24C64A 2-Wire Serial EEPROM
Ver 1.1
Data Sheet
2
Description
The FM24C64A provides 65,536 bits of serial electrically
erasable and programmable read-only memory (EEPROM)
organized as 8192 words of 8 bits each. The device’s
cascadable feature allows up to 8 devices to share a
common 2-wire bus. The device is optimized for use in
many industrial and commercial applications where
low-power and low-voltage operations are essential.
Packaging Type
PDIP 8
A0
A1
A2
GND
1
2
3
4
8
7
6
5
VCC
WP
SCL
SDA
Features
Low Operation Voltage: V
CC
= 1.7V to 5.5V
Internally Organized: 8192 x 8
2-wire Serial Interface
Schmitt Trigger, Filtered Inputs for Noise
Suppression
Bi-directional Data Transfer Protocol
1MHz (2.5V~5.5V) and 400 kHz (1.7V) Compatibility
Write Protect Pin for Hardware Data Protection
32-byte Page Write Modes (Partial Page Writes are
Allowed)
Self-timed Write Cycle (5 ms max)
High-reliability
–
Endurance: 1,000,000 Write Cycles
–
Data Retention: 40 Years
PDIP8 Package (RoHS Compliant)
SOP8, TSSOP8, TDFN8 Packages (RoHS
Compliant and Halogen-free)
A0
A1
A2
GND
SOP 8
1
2
3
4
8
7
6
5
VCC
WP
SCL
SDA
TSSOP8
A0
A1
A2
GND
1
2
3
4
8
7
6
5
VCC
WP
SCL
SDA
TDFN8
A0
A1
A2
GND
1
2
3
4
8
7
6
5
Vcc
WP
SCL
SDA
Module package (8 Pin)
VCC
NC
SCL
NC
C1
C2
C3
C4
C5
C6
C7
C8
GND
NC
SDA
NC
Absolute Maximum Ratings
Operating Temperature
(Plastic Package)
Operating Temperature
(Module Package)
Storage Temperature
(Plastic Package)
Storage Temperature
(Module Package)
Voltage on Any Pin with Respect to
Ground
Maximum Operating Voltage
DC Output Current
-55°C to +125°C
-20°C to +60°C
-65°C to +150°C
-25°C to +70°C
-1.0V to +7.0V
6.25V
5.0 mA
Pin Configurations
Pin Name
A0~A2
SDA
SCL
WP
V
CC
GND
NC
Function
Device Address Inputs
Serial Data Input/Output
Serial Clock Input
Write Protect
Power Supply
Ground
Not Connect
*NOTICE: Stresses beyond those listed under “Absolute Maximum
Ratings” may cause permanent damage to the device. This is a
stress rating only and functional operation of the device at these or
any other conditions beyond those indicated in the operational
sections of this specification are not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device
reliability.
FM24C64A 2-Wire Serial EEPROM
Ver 1.1
Data Sheet
3
Figure 1．Block Diagram
FM24C64A 2-Wire Serial EEPROM
Ver 1.1
Data Sheet
4
Pin Description
SERIAL CLOCK (SCL):
The SCL input is used to
positive edge clock data into each EEPROM device
and negative edge clock data out of each device.
SERIAL DATA (SDA):
The SDA pin is bi-directional
for serial data transfer. This pin is open-drain driven
and may be wire-ORed with any number of other
open-drain or open-collector devices.
DEVICE/PAGE ADDRESSES (A2, A1, A0):
The A2,
A1 and A0 pins are device address inputs that are
hardwired or left not connected for hardware
compatibility with other FM24CXX
／
FM24CXX
devices. When the pins are hardwired, as many as
eight 64K devices may be addressed on a single
bus system (device addressing is discussed in detail
under the Device Addressing section). If the pins
are left floating, the A2, A1 and A0 pins will be
internally pulled down to GND if the capacitive
coupling to the circuit board V
CC
plane is <3pF, if
coupling is >3pF, FMSH recommends connecting
the address pins to GND.
WRITE PROTECT (WP):
The FM24C64A has a
Write Protect pin that provides hardware data
protection. The WP pin allows normal write operations
when connected to ground (GND). When the Write
Protect pin is connected to VCC, all write operations
to the memory are inhibited. If the pin is left floating,
the WP pin will be internally pulled down to GND if
the capacitive coupling to the circuit board Vcc plane
is <3pF. If coupling is >3pF, FMSH recommends
connecting the WP to GND. Switching WP to VCC
prior to a write operation creates a software write
protected function.
Write Protect Description
WP Pin Status
WP=V
CC
WP=GND
Part of the Memory Protected
FM 24C64A
Full (64K) Memory
Normal Read/Write Operations
Memory Organization
FM24C64A, 64K SERIAL EEPROM:
Internally organized with 256 pages of 32 bytes each, the 64K requires
a 13-bit data word address for random word addressing.
FM24C64A 2-Wire Serial EEPROM
Ver 1.1
Data Sheet
5
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