Samsung S524AB0X91, S524AB0XB1 Datasheet
S524AB0X91/B0XB1
32K/64K-bit
Serial EEPROM
for Low Power
Data Sheet
OVERVIEW
The S524AB0X91/B0XB1 serial EEPROM has a 32K/64K-bit (4,096/8,192 bytes) capacity, supporting the
standard I2C™-bus serial interface. It is fabricated using Samsung’s most advanced CMOS technology. It has
been developed for low power and low voltage applications (1.8 V to 5.5 V). One of its major feature is a
hardware-based write protection circuit for the entire memory area. Hardware-based write protection is controlled
by the state of the write-protect (WP) pin. Using one-page write mode, you can load up to 32 bytes of data into
the EEPROM in a single write operation. Another significant feature of the S524AB0X91/B0XB1 is its support for
fast mode and standard mode.
FEATURES
I2C-Bus Interface
• Two-wire serial interface
• Automatic word address increment
EEPROM
• 32K/64K-bit (4,096/8,192 bytes) storage area
• 32-byte page buffer
• Typical 3 ms write cycle time with
auto-erase function
• Hardware-based write protection for the entire
EEPROM (using the WP pin)
• EEPROM programming voltage generated
on chip
• 1,000,000 erase/write cycles
• 100 years data retention
Operating Characteristics
• Operating voltage
— 1.8 V to 5.5 V
• Operating current
— Maximum write current: < 3 mA at 5.5 V
— Maximum read current: < 400 µA at 5.5 V
— Maximum stand-by current: < 1 µA at 5.5 V
• Operating temperature range
— – 25°C to + 70°C (commercial)
— – 40°C to + 85°C (industrial)
• Operating clock frequencies
— 100 kHz at standard mode
— 400 kHz at fast mode
• Electrostatic discharge (ESD)
— 5,000 V (HBM)
— 500 V (MM)
Packages
• 8-pin DIP, SOP, and TSSOP
6-1
S524AB0X91/B0XB1 SERIAL EEPROM DATA SHEET
SDA
WP
SCL
A0
A1
A2
Start/Stop
Logic
Slave Address
Comparator
Control Logic
Word Address
Pointer
Row
decoder
HV Generation
Timing Control
EEPROM
Cell Array
4,096 x 8 bits
8,192 x 8 bits
Column Decoder
Data Register
DOUT and ACK
Figure 6-1. S524AB0X91/B0XB1 Block Diagram
6-2
DATA SHEET S524AB0X91/B0XB1 SERIAL EEPROM
VCC WP SCL SDA
S524AB0X91/B0XB1
A0 A1 A2 VSS
NOTE: The S524AB0X91/B0XB1 is available in
8-pin DIP, SOP, and TSSOP package.
Figure 6-2. Pin Assignment Diagram
Table 6-1. S524AB0X91/B0XB1 Pin Descriptions
Name Type Description Circuit
A0, A1, A2
Input Input pins for device address selection. To configure a device address,
these pins should be connected to the VCC or V
of the device.
SS
These pins are internally pulled down to VSS.
VSS
– Ground pin. –
SDA I/O Bi-directional data pin for the I2C-bus serial data interface. Schmitt
trigger input and open-drain output. An external pull-up resistor must
be connected to V
DD.
SCL Input Schmitt trigger input pin for serial clock input. 2
WP Input
Input pin for hardware write protection control. If you tie this pin to V
CC,
the write function is disabled to protect previously written data in the
entire memory; if you tie it to VSS, the write function is enabled.
This pin is internally pulled down to VSS.
VCC
– Single power supply. –
Type
1
3
1
NOTE: See the following page for diagrams of pin circuit types 1, 2, and 3.
6-3
S524AB0X91/B0XB1 SERIAL EEPROM DATA SHEET
A0, A1,
A2, WP
Figure 6-3. Pin Circuit Type 1
SDA
SCL
Noise
Filter
Figure 6-4. Pin Circuit Type 2
Data Out
VSS
Noise
Filter
Figure 6-5. Pin Circuit Type 3
Data In
6-4
DATA SHEET S524AB0X91/B0XB1 SERIAL EEPROM
FUNCTION DESCRIPTION
I2C-BUS INTERFACE
The S524AB0X91/B0XB1 supports the I2C-bus serial interface data transmission protocol. The two-wire bus
consists of a serial data line (SDA) and a serial clock line (SCL). The SDA and the SCL lines must be connected
to VCC by a pull-up resistor that is located somewhere on the bus.
Any device that puts data onto the bus is defined as a “transmitter” and any device that gets data from the bus is
a “receiver.” The bus is controlled by a master device whic h generates the serial clock and start/stop conditions,
controlling bus access. Using the A0, A1, and A2 input pins, up to eight S524AB0X91/B0XB1 devices can be
connected to the same I2C-bus as slaves (see Figure 6-6). Both the master and slaves can operate as a
transmitter or a receiver, but the master device determines which bus operating mode would be active.
CC
V
CC
V
SDA
SCL
Bus Master
(Transmitter/
Receiver)
MCU
Slave 1
S524AB0X91/
B0XB1
Tx/Rx
A0 A1 A2
To VCC or V
SS
Slave 2
S524AB0X91/
B0XB1
Tx/Rx
A0 A1 A2
To VCC or V
SS
Slave 3
S524AB0X91/
B0XB1
Tx/Rx
A0 A1 A2
To VCC or V
Figure 6-6. Typical Configuration
SS
Slave 8
S524AB0X91/
B0XB1
Tx/Rx
A0 A1 A2
To VCC or V
SS
R
R
6-5
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