S524A40X10/40X20/40X40
1K/2K/4K-bit
Serial EEPROM for Low Power
with software write protect
Data Sheet
OVERVIEW
The S524A40X10/40X20/40X40 serial EEPROM has a 1,024/2,048/4,096-bit (128/256/512-byte) capacity,
supporting the standard I2C™-bus serial interface. It is fabricated using Samsungs’ most advanced CMOS
technology. It has been developed for low power and low voltage applications (1.8 V to 5.5 V). Important features
are a hardware-based write protection circuit for the entire memory area and software-based write protection logic
for the lower 128 bytes. Hardware-based write protection is controlled by the state of the write-protect (WP) pin.
The software-based method is one-time programmable and permanent. Using one-page write mode, you can
load up to 16 bytes of data into the EEPROM in a single write operation. Another significant feature of the
S524A40X10/40X20/40X40 is its support for fast mode and standard mode.
FEATURES
I2C-Bus Interface
Operating Characteristics
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Two-wire serial interface
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Operating voltage
— 1.8 V to 5.5 V
Automatic word address increment
EEPROM
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Operating current
— Maximum write current: < 3 mA at 5.5 V
— Maximum read current: < 200 mA at 5.5 V
— Maximum stand-by current: < 1 mA 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
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1K/2K/4K-bit (128/256/512-byte) storage area
16-byte page buffer
Typical 3 ms write cycle time with
auto-erase function
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Hardware-based write protection for the entire
EEPROM (using the WP pin)
Software-based write protection for the lower
128-byte EEPROM
EEPROM programming voltage generated
on chip
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1,000,000 erase/write cycles
100 years data retention
Electrostatic discharge (ESD)
— 5,000 V (HBM)
— 500 V (MM)
Packages
8-pin DIP, SOP, and TSSOP
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2-1