X76F400 Datasheet, PDF (1/14 Pages) IC MICROSYSTEMS – Secure SerialFlash

This X76F400 device has been acquired by
IC MICROSYSTEMS from Xicor, Inc.
4K
X76F400
ICmic^TM
IC MICROSYSTEMS
512 x 8 bit
Secure SerialFlash
FEATURES
•64-bit password security
•One array (496 bytes) two passwords (16 bytes)
—Read password
—Write password
•Programmable passwords
•Retry counter register
—Allows 8 tries before clearing of the array
•32-bit response to reset (RST input)
•8 byte sector write mode
•1MHz clock rate •2-wire
serial interface •Low
power CMOS
—2.5 to 5.5V operation
—Standby current less than 1µA
—Active current less than 3 mA
•High reliability endurance:
—100,000 write cycles
•Data retention: 100 years
•Available in:
—8-lead, SOIC,TSSOP
DESCRIPTION
The X76F400 is a password access security supervisor,
containing one 3968-bit Secure Serial Flash array.
Access to the memory array can be controlled by two 64-bit
passwords. These passwords protect read and
write operations of the memory array.
The X76F400 features a serial interface and software
protocol allowing operation on a popular 2-wire bus.
The bus signals are a clock input (SCL) and a bi-directional
data input and output (SDA).
The X76F400 also features a synchronous response to
reset, providing an automatic output of a hard-wired
32-bit data stream, thereby meeting the industry standard
for memory cards.
The X76F400 utilizes Xicor’s proprietary Direct Write ^™
cell, providing a minimum endurance of 100,000
cycles and a minimum data retention of 100 years.
BLOCK DIAGRAM
SCL
SDA
Interface
Logic
RST
REV 1.0 7/5/00
Data Transfer
Array Access
Enable
Password Array
and Password
Verification Logic
ISO Reset
Response Register
Retry Counter
Erase Logic
496 Byte
EEPROM Array
www.icmic.com
Characteristics subject to change without notice. 1 of 14