FM24C08D
2-Wire Serial EEPROM
With Unique ID and Security Sector
Data Sheet
Dec. 2015
FM24C08D 2-Wire Serial EEPROM
Ver1.1
Data Sheet
1
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FM24C08D 2-Wire Serial EEPROM
Ver1.1
Data Sheet
2
Description
The FM24C08D provides 8192 bits of serial electrically
erasable and programmable read-only memory (EEPROM)
organized as 1024 words of 8 bits each, with 128-bit UID and
16-byte Security Sector. The device is optimized for use in
many industrial and commercial applications where
low-power and low-voltage operations are essential.
Packaging Type
Features
Low Operation Voltage: V
CC
= 1.7V to 5.5V
Internally Organized: 1024 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
16-Byte Page Write Modes (Partial Page Writes are
Allowed)
Lockable 16-Byte Security Sector
128-Bit Unique ID for each device
Self-timed Write Cycle (5 ms max)
High-reliability
–
Endurance: 1,000,000 Write Cycles
–
Data Retention: 40 Years
PDIP8 (RoHS Compliant)
SOP8, TSSOP8, TSOT23-5L and TDFN8 Packages
(RoHS Compliant and Halogen-free)
Wafer Sales: available in Wafer Form
Absolute Maximum Ratings
Operating Temperature
(Plastic Package)
Storage Temperature
(Plastic Package)
Voltage on Any Pin with Respect
to Ground
Maximum Operating Voltage
DC Output Current
-55°C to +125°C
-65°C to +150°C
-1.0V to +7.0V
6.25V
5.0 mA
Pin Name
A0½A2
SDA
SCL
WP
V
CC
GND
Function
Not Connected
Serial Data Input/Output
Serial Clock Input
Write Protect
Power Supply
Ground
Pin Configurations
*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.
FM24C08D 2-Wire Serial EEPROM
Ver1.1
Data Sheet
3
Figure 1．Block Diagram
FM24C08D 2-Wire Serial EEPROM
Ver1.1
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:
A total of one device
may be addressed on a single bus system.
WRITE PROTECT (WP):
The FM24C08D
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 Array Protected
FM 24C08D
Full (8K) Array
Normal Read/Write Operations
Memory Organization
FM24C08D, 8K SERIAL EEPROM:
Internally organized with 64 pages of 16 bytes each, the 8K requires an
11-bit data word address for random word addressing.
Security Sector
：
The FM24C08D offers 16-byte Security Sectors which can be written and (later)
permanently locked in Read-only mode. These registers may be used by the system manufacturers to store
security and other important information separately from the main memory array.
Unique ID:
The FM24C08D utilizes a separate memory block containing a factory programmed 128-bit
unique ID. Access to this memory location is obtained by beginning the device address word with a ‘1011’(Bh)
sequence.
Memory Organization
Device Address
WORD Address
1
2
1010 0xxx
xxxx xxxx
Data Memory (64 X 16B)
3
4
1011 0xxx
00xx xxxx
Security Sector (1 X 16B)
5
6
1011 0xx1
10xx xxxx
Unique ID (1 X 16B)
Note:
1. The sixth to seventh bits are memory page address bits (P1/P0) ,and the eighth bit is the read/write
operation select bit.
2. Address bits P1/P0 and A<7:4> define page address and A<3:0> define byte address.
3. The sixth to seventh bits are don’t care, and the eighth bit is the read/write operation select bit.
4. Address bits A<7:6> must be ‘00’, A<3:0> define byte address, other bits are don’t care.
5. The sixth to seventh bits are don’t care, and the eighth bit is the read/write operation select bit which
must be ‘1’.
6. Address bits A<7:6> must be ‘10’, A<3:0> define byte address, other bits are don’t care.
FM24C08D 2-Wire Serial EEPROM
Ver1.1
Data Sheet
5
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