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X25170 Datasheet, PDF (1/15 Pages) IC MICROSYSTEMS – SPI Serial E 2 PROM with Block Lock ™ Protection
This X25170 device has been acquired by
IC MICROSYSTEMS from Xicor, Inc.
ICmicTM
IC MICROSYSTEMS
16K
X25170
2K x 8 Bit
SPI Serial E 2PROM with Block Lock ™ Protection
FEATURES
•5MHz Clock Rate
•SPI Modes (0,0 & 1,1)
•2K X 8 Bits
—32 byte page mode
•Low Power CMOS
—<1µA standby current
—<5mA active current
•2.5V To 5.5V Power Supply
•Block Lock Protection
—Protect 1/4, 1/2 or all of E2PROM array
•Built-In Inadvertent Write Protection
—Power-up/power-down protection circuitry
—Write enable latch
—Write protect pin
•Self-Timed Write Cycle
—5ms write cycle time (typical)
•High Reliability
—Endurance: 100,000 cycles
—Data retention: 100 Years
—ESD protection: 2000V on all pins
•8-Lead PDlP Package
•8-Lead SOIC Package
•14-Lead TSSOP Package
DESCRIPTION
The X25170 is a CMOS 16384-bit serial E2PROM,
internally organized as 2K x 8. The X25170 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 X25170 also features two additional inputs that
provide the end user with added flexibility. By asserting
the HOLD input, the X25170 will ignore transitions on its
inputs, thus allowing the host to service higher prior-
ity interrupts. The WP input can be used as a hardwire input
to the X25170 (disabling all write attempts to the
status register), thus providing a mechanism for limiting end
user capability of altering 0, 1/4, 1/2 or all of the memory.
The X25170 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
Status
Register
SO
SI
SCK
CS
HOLD
Command
Decode
and
Control
Logic
Write
Protect
Logic
Write
Control
and
WP
Timing
Logic
Direct Write™ and Block Lock™ Protection is a trademark of Xicor, Inc.
©Xicor, Inc. 2000 Patents Pending
9900-5004.9 5/26/00 EP
X Decode
Logic
16
2K Byte
Array
16 X 256
16
16 X 256
32
32 X 256
32
8
Y Decode
Data Register
Characteristics subject to change without notice. 1 of 15