Fremont Micro Devices
FT24C02A-FXX
Two-Wire Serial EEPROM
2K (16-bit wide)
FEATURES
Low voltage and low power operations:
FT24C02A-FXX: VCC = 1.8V to 5.5V, Industrial temperature range (-40℃ to 85℃).
Maximum Standby current < 1µA (typically 0.02µA and 0.06µ A @ 1.8V and 5.5V respectively).
16 bytes page write mode.
Standard 2-wire bi-directional serial interface.
Schmitt trigger, filtered inputs for noise protection.
Self-timed programming cycle (5ms maximum).
Automatic erase before write operation.
100 years data retention.
1 MHz (5V), 400 kHz (1.8V, 2.5V, 2.7V) Compatibility.
High reliability: typically 1,000,000 cycles endurance.
Standard 8-pin DIP/SOP/MSOP/TSSOP/DFN and 5-pin SOT-23/TSOT-23 Pb-free packages.
The FT24C02A-FXX is 2048 bits of serial Electrical Erasable and Programmable Read Only Memory,
commonly known as EEPROM. They are organized as 256 words of 8 bits (1 byte) each. The devices are
devices are available in standard 8-lead DIP, 8-lead SOP, 8-lead MSOP, 8-lead TSSOP, 8-lead DFN and
5-lead SOT-23/TSOT-23 packages. A standard 2-wire serial interface is used to address all read and write
functions. Our extended V
CC
range (1.8V to 5.5V) devices enables wide spectrum of applications.
© 2015 Fremont Micro Devices Inc.
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fabricated with proprietary advanced CMOS process for low power and low voltage applications. These
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DESCRIPTION
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Internally organized: 256
×
8 (2K).
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Partial page write operation allowed.
Fremont Micro Devices
FT24C02A-FXX
PIN CONFIGURATION
Pin Name
SDA
SCL
VCC
GND
NC
Pin Function
Serial Data Input / Open Drain Output
Serial Clock Input
Power Supply
Ground
No-Connect
Table 1
FT24C02A-FXX
NC
NC
NC
GND
1
2
3
4
8
7
6
5
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8L
8L
8L
8L
8L
DIP
SOP
TSSOP
DFN
MSOP
Figure 1: Package types
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2
3
4
VCC
NC
SCL
SDA
FT24C02A-FXX
SCL
GND
SDA
1
5
5L SOT-23
5L TSOT-23
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NC
VCC
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All these packaging types come in conventional or Pb-free certified.
Fremont Micro Devices
FT24C02A-FXX
ABSOLUTE MAXIMUM RATINGS
Industrial operating temperature:
Storage temperature:
Input voltage on any pin relative to ground:
Maximum voltage:
ESD protection on all pins:
-40℃ to 85℃
-50℃ to 125℃
-0.3V to V
CC
+ 0.3V
8V
>2000V
* Stresses exceed those listed under “Absolute Maximum Rating” may cause permanent damage to the
device. Functional operation of the device at conditions beyond those listed in the specification is not
guaranteed. Prolonged exposure to extreme conditions may affect device reliability or functionality.
FM
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Figure 2: Block Diagram
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Fremont Micro Devices
FT24C02A-FXX
PIN DESCRIPTIONS
(A) SERIAL CLOCK (SCL)
The rising edge of this SCL input is to latch data into the EEPROM device while the falling edge of
this clock is to clock data out of the EEPROM device.
(B) SERIAL DATA LINE (SDA)
SDA data line is a bi-directional signal for the serial devices. It is an open drain output signal and can
be wired-OR with other open-drain output devices.
The FT24C02A-FXX devices have 16 pages. Since each page has 16 bytes, random word addressing to
FT24C02A-FXX will require 8 bits data word addresses.
DEVICE OPERATION
(A) SERIAL CLOCK AND DATA TRANSITIONS
Serial clock SCL is at V
IL
. Any SDA signal transition may interpret as either a START or STOP
condition as described below.
(B) START CONDITION
With SCL
≥
V
IH
, a SDA transition from high to low is interpreted as a START condition. All valid
commands must begin with a START condition.
(C) STOP CONDITION
With SCL
≥
V
IH
, a SDA transition from low to high is interpreted as a STOP condition. All valid read
or write commands end with a STOP condition. The device goes into the STANDBY mode if it is after
a read command. A STOP condition after page or byte write command will trigger the chip into the
STANDBY mode after the self-timed internal programming finish.
© 2015 Fremont Micro Devices Inc.
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(D) ACKNOWLEDGE
The 2-wire protocol transmits address and data to and from the EEPROM in 8 bit words. The
EEPROM acknowledges the data or address by outputting a "0" after receiving each word. The
ACKNOWLEDGE signal occurs on the 9th serial clock after each word.
(E) STANDBY MODE
The EEPROM goes into low power STANDBY mode after a fresh power up, after receiving a STOP bit
in read mode, or after completing a self-time internal programming operation.
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The SDA pin is typically pulled to high by an external resistor. Data is allowed to change only when
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MEMORY ORGANIZATION
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Fremont Micro Devices
FT24C02A-FXX
SCL
SDA
START
Condition
Data
Valid
Data
Transition
STOP
Condition
START Condition
SCL
Data in
Data out
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Figure 4: Timing diagram for output ACKNOWLEDGE
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Figure 3: Timing diagram for START and STOP conditions
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嵌入式系统
