IS34C02 Datasheet, PDF (1/15 Pages) Integrated Silicon Solution, Inc – 2K-bit 2-WIRE SERIAL CMOS EEPROM with Permanent Write-Protection

IS34C02
2K-bit 2-WIRE SERIAL CMOS EEPROM
with Permanent Write-Protection
ISSI^®
ADVANCED INFORMATION
JANUARY 2005
FEATURES
• Two-Wire Serial Interface, I²C^TM compatible
– Bidirectional data transfer protocol
– 400 kHz (2.5V) and 1 MHz (5.0V) compatibility
• Organization:
– 256 x 8-bit
• Data Protection Features
– Write Protect Pin
– Permanent Software Protection
• 16-Byte Page Write Buffer
– Partial Page-writes permitted
• Low Power CMOS Technology
– Active Current less than 2 mA (5V)
– Standby Current less than 6 µA (5V)
– Standby Current less than 2 µA (2.5V)
• Low Voltage Operation
– IS34C02-2: Vcc = 1.8V to 5.5V
– IS34C02-3: Vcc = 2.5V to 5.5V
• Random or Sequential Read Modes
• Filtered Inputs for Noise Suppression
• Self timed Write cycle with auto clear
– 5 ms @ 2.5V
• High Reliability
– Endurance: 1,000,000 Cycles
– Data Retention: 40 Years
• Automotive and Industrial temperature ranges
• 8-pin SOIC, 8-pin TSSOP, and 8-pin MSOP
• Lead-free available
DESCRIPTION
The IS34C02 is an electrically erasable PROM device
that uses the standard 2-wire interface for
communications. The IS34C02 contains a memory
array of 2,048-bits (256K x 8), and is further subdivided
into 16 pages of 16 bytes each for page-write mode.
The software write-protection feature is initiated with a
unique irreversible instruction. After this command is
transmitted, the first 128 bytes of the array become
permanently read-only. This feature is popular in
applications like DRAM DIMMs to retain DRAM related
data. This EEPROM is offered in wide operating voltages
of 1.8V to 5.5V (IS34C02-2) and 2.5V to 5.5V (IS34C02-
3) to be compatible with most application voltages. ISSI
designed the IS34C02 as a low-cost and low-power 2-
wire EEPROM solution. The devices are packaged in
8-pin SOIC, and 8-pin TSSOP, and 8-pin MSOP.
The IS34C02 maintains compatibility with the popular 2-
wire bus protocol, so it is easy to use in 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 IS34C02. 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 IS34C02 has a Write Protect pin (WP)
to allow blocking of any write instruction transmitted over
the bus.
Copyright © 2005 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
arising out of the application or use of any information, products or services described herein. Customers are advised to obtain the latest version of this device specification before relying on any published
information and before placing orders for products.
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774
1
ADVANCED INFORMATION Rev.00E
01/12/05