®
IS25C32-2/3
IS25C64-2/3
ISSI
32,768/65,536-BIT SPI SERIAL
ELECTRICALLY ERASABLE PROM
PRELIMINARY INFORMATION
NOVEMBER 2001
DESCRIPTION
FEATURES
• 2.1 MHz Clock Rate
• Low power CMOS
The IS25C64-2 is a 1.8V (1.8V-5.5V) 64K-bit (8192x8)
electrically Erasable PROM, IS25C64-3 is a 2.5V (2.5V-
5.5V) 64K bit (8192x8) Electrically Erasable PROM,
IS25C32-2 is a 1.8V (1.8V-5.5V) 32K-bit (4096x8) Electri-
cally Erasable PROM, IS25C32-3 is a 2.5V (2.5V-5.5V)
32K-bit (4096x8) Electrically Erasable PROM.
— Active current less than 3.0 mA (5.5V)
— Standby current less than 10 µA (5.5V)
• Low-voltage Operation
— IS25C64-3 & IS25C32-3 (Vcc = 2.5V to 5.5V)
— IS25C64-2 & IS25C32-2 (Vcc = 1.8V to 5.5V)
• Block Write Protection
TheIS25Cxx(IS25C64-2, IS25C64-3, IS25C32-2and
IS25C32-3) family is a low-cost and low voltage/low power
SPI Serial EEPROM. It is fabricated using ISSI's ad-
vanced CMOS EEPROM technology and provides a low
power and low voltage operation for low power industrial
and commercial application. The IS25Cxx family is
available in 8 pin PDIP, 8 Pin SOIC, and 14 pin TSSOP
packages.
— Protect 1/4, 1/2, or Entire Array
32 byte page write mode
• Serial Peripheral Interface (SPI) Compatible
— Supports SPI Modes 0 (0,0) and 3 (1,1)
• Self timed write cycles (5 ms Typical)
• High-reliability
•
— Endurance: 1 million cycles per byte
— Data retention: 100 years
— ESD protection >4000V
• Industrial temperature available
The IS25Cxx is enabled through the Chip Select pin (CS)
and accessed via a 3-wire interface consisting of Serial
Data Input (SI), Serial Data Output (SO), and Serial Clock
(SCK). All programming cycles are completely self-timed,
and no separate ERASE cycle is required before WRITE.
BLOCK WRITE protection is enabled by programming the
status register with one of four configurations of write
protection. Separate program enable and program disable
instructions are provided for additional data protection.
Hardware data protection is provided via the WP pin to
protect against inadvertent write attempts to the status
register. The HOLD pin can suspend communications
without re-initializing the serial sequence.
•
8-pin PDIP or SOIC, and 14-pin TSSOP Packages
PRODUCT OFFERING OVERVIEW
Part No
Voltage
1.8V-5.5V
2.5V-5.5V
1.8V-5.5V
2.5V-5.5V
Speed
500 KHz
2.1MHz
500 KHz
2.1MHz
Standby ICC
< 5 µA
Read ICC
1 mA
Write ICC
3 mA
Temperature
IS25C64-2
IS25C64-3
IS25C32-2
IS25C32-3
C,I
C,I
C,I
C,I
< 10 µA
< 5 µA
1 mA
3 mA
1 mA
3 mA
< 10 µA
1 mA
3 mA
This document contains PRELIMINARY INFORMATION data. ISSI reserves the right to make changes to its products at any time without notice in order to improve design and supply the
best possible product. We assume no responsibility for any errors which may appear in this publication. © Copyright 2001, Integrated Silicon Solution, Inc.
Integrated Silicon Solution, Inc. — 1-800-379-4774
1
PRELIMINARYINFORMATION Rev. 00C
11/01/01