IS93C46B Datasheet, PDF (1/13 Pages) Integrated Silicon Solution, Inc – 1,024-BIT SERIAL ELECTRICALLY ERASABLE PROM

IS93C46B
ISSI ^®
1,024-BIT SERIAL ELECTRICALLY
ERASABLE PROM
JULY 2003
FEATURES
• Industry-standard Microwire Interface
— Non-volatile data storage
— Low voltage operation:
Vcc = 2.5V to 5.5V
— Full TTL compatible inputs and outputs
— Auto increment for efficient data dump
• x16 bit organization
• Hardware and software write protection
— Defaults to write-disabled state at power-up
— Software instructions for write-enable/disable
• Enhanced low voltage CMOS E²PROM
technology
• Versatile, easy-to-use Interface
— Self-timed programming cycle
— Automatic erase-before-write
— Programming status indicator
— Word and chip erasable
— Chip select enables power savings
• Durable and reliable
— 40-year data retention after 1M write cycles
— 1 million write cycles
— Unlimited read cycles
— Schmitt-trigger inputs
• Industrial and Automotive Temperature Grade
DESCRIPTION
The IS93C46B is a low-cost 1kb non-volatile,
ISSI ^® serial EEPROM. It is fabricated using an
enhanced CMOS design and process. The
IS93C46B contains power-efficient read/write
memory, and organization of 64 words of 16 bits.
The IS93C46B is fully backward compatible with
IS93C46.
An instruction set defines the operation of the
devices, including read, write, and mode-enable
functions. To protect against inadvertent data
modification, all erase and write instructions are
accepted only while the device is write-enabled. A
selected x16 word can be modified with a single
WRITE or ERASE instruction. Additionally, the
two instructions WRITE ALL or ERASE ALL can
program the entire array. Once a device begins
its self-timed program procedure, the data out pin
(Dout) can indicate the READY/BUSY status by
raising chip select (CS). The self-timed write cycle
includes an automatic erase-before-write
capability. The device can output any number of
consecutive words using a single READ
instruction.
FUNCTIONAL BLOCK DIAGRAM
DIN
INSTRUCTION
REGISTER
CS
SK
INSTRUCTION
DECODE,
CONTROL,
AND
CLOCK
GENERATION
DATA
REGISTER
ADDRESS
REGISTER
WRITE
ENABLE
DUMMY
BIT
R/W
AMPS
ADDRESS
DECODER
HIGH VOLTAGE
GENERATOR
DOUT
EEPROM
ARRAY
64x16
Copyright © 2003 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
Rev. A
07/23/03