|
X25642 Datasheet, PDF (1/16 Pages) Xicor Inc. – Advanced SPI Serial E 2 PROM with Block Lock TM Protection | |||
|
This X25642 device has been acquired by
IC MICROSYSTEMS from Xicor, Inc.
ICmicTM
IC MICROSYSTEMS
64K
X25642
8K x 8 Bit
Advanced SPI Serial E2PROM with Block LockTM Protection
FEATURES
â¢2MHz Clock Rate
â¢Low Power CMOS
â<1µA Standby Current
â<5mA Active Current
â¢2.7V To 5.5V Power Supply
â¢SPI Modes (0,0 & 1,1)
â¢8K X 8 Bits
â32 Byte Page Mode
â¢Block Lock Protection
âProtect 1/4, 1/2 or all of E2PROM Array
â¢Built-in Inadvertent Write Protection
âPower-Up/Down protection circuitry
âWrite Enable Latch
âWrite Protect Pin
â¢Self-Timed Write Cycle
â5ms Write Cycle Time (Typical)
â¢High Reliability
âEndurance: 100,000 cycles
âData Retention: 100 Years
âESD protection: 2000V on all pins
â¢Packages
â8-Lead PDIP
â8-Lead SOIC
â14-Lead SOIC
â20-Lead TSSOP
DESCRIPTION
The X25642 is a CMOS 65,536-bit serial E2PROM,
internally organized as 8K x 8. The X25642 features a
Serial Peripheral Interface (SPI) and software protocol
allowing operation on a simple three-wire bus. The bus
signals are a clock input (SCK) plus separate data in (SI)
and data out (SO) lines. Access to the device is
controlled through a chip select (CS) input, allowing any
number of devices to share the same bus.
The X25642 also features two additional inputs that
provide the end user with added flexibility. By
asserting the HOLD input, the X25642 will ignore tran-
sitions on its inputs, thus allowing the host to service
higher priority interrupts. The WP input can be used as a
hardwire input to the X25642 disabling all write
attempts to the status register, thus providing a mech-
anism for limiting end user capability of altering 0, 1/4,
1/2 or all of the memory.
The X25642 utilizes Xicorâs proprietary Direct WriteTM cell,
providing a minimum endurance of 100,000
cycles and a minimum data retention of 100 years.
FUNCTIONAL DIAGRAM
STATUS
REGISTER
SO
SI
SCK
CS
HOLD
COMMAND
DECODE
AND
CONTROL
LOGIC
WRITE
PROTECT
LOGIC
X DECODE
LOGIC
64
64
128
8K BYTE
ARRAY
64 X 256
64 X 256
128 X 256
WRITE
CONTROL
AND
WP
TIMING
LOGIC
Direct WriteTM and Block Lock ProtectionTM is a trademark of Xicor, Inc.
©Xicor, Inc. 1994, 1995, 1996 Patents Pending
1
3132-1.0 1/17/97 T5/C0/D1 SH
32
8
Y DECODE
DATA REGISTER
3132 ILL F01.1
Characteristics subject to change without notice
|
▷ |