IS24C128B
128K-bit
2-WIRE SERIAL CMOS EEPROM
ADVANCEDINFORMATION
JUNE2007
FEATURES
DESCRIPTION
• Two-Wire Serial Interface, I2CTM compatible
–Bi-directional data transfer protocol
• Wide Voltage Operation
The IS24C128B is an electrically erasable PROM
device that uses the standard 2-wire interface for
communications. The IS24C128B is 128K-bit (16Kx8).
These EEPROM are offered in a wide operating voltage
range of 1.8V to 5.5V to be compatible with most
application voltages. ISSI designed the IS24C128B to
be an efficient 2-wire EEPROM solution. The devices
are packaged in 8-pin PDI, 8-pin TSSOP, 8-pin
(JEDEC) SOIC, and 8-pin (EIAJ) SOIC.
–Vcc = 1.8V to 5.5V
• 400 KHz (1.8V) and 1 MHz (5.0V) compatibility
• Low Power CMOS Technology
–Active Current less than 3 mA (1.8V)
–Standby Current less than 15 µA (1.8V)
• Hardware Data Protection
–Write Protect Pin
The IS24C128B maintains compatibility with the
popular 2-wire bus protocol, so it is easy to design into
applications implementing this bus type. The simple
bus consists of the Serial Clock wire (SCL) and the
Serial Data wire (SDA). Using the bus, a Master device
such as a microcontroller is usually connected to one
or more Slave devices such as the IS24C128B. The
bit stream over the SDA line includes a series of bytes,
which identifies a particular Slave device, an
instruction, an address within that Slave device, and a
series of data, if appropriate. The IS24C128B has a
Write Protect pin (WP) to allow blocking of any write
instruction transmitted over the bus.
• Sequential Read Feature
• Filtered Inputs for Noise Suppression
• Self time write cycle with auto clear
–5 ms @ 1.8V
• Organization:
–16Kx8 (256 pages of 64 bytes)
• 64 Byte Page Write Buffer
• High Reliability
–Endurance: 1,000,000 Cycles
–Data Retention: 40 Years
• Industrial and Automotive temperature ranges
• 8-pin PDIP, 8-pin TSSOP, 8-pin (JEDEC) SOIC,
and 8-pin (EIAJ) SOIC packages
Copyright © 2006 Integrated Silicon Solution, Inc. All rights reserved. ISSI reserves the right to make changes to this specification and its products at any time without notice. ISSI assumes no liability
arisingoutoftheapplicationoruseofanyinformation, productsorservicesdescribedherein. Customersareadvisedtoobtainthelatestversionofthisdevicespecificationbeforerelyingonany
publishedinformationandbeforeplacingordersforproducts.
Integrated Silicon Solution, Inc. — www.issi.com
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ADVANCEDINFORMATION Rev. 00C
06/14/07