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X25168S8I-2.7 Datasheet(PDF) 1 Page - Xicor Inc.

Part # X25168S8I-2.7
Description  V CC Supervisory Circuit w/Serial E 2 PROM
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Manufacturer  XICOR [Xicor Inc.]
Direct Link  http://www.xicor.com
Logo XICOR - Xicor Inc.

X25168S8I-2.7 Datasheet(HTML) 1 Page - Xicor Inc.

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©Xicor, Inc. 1994, 1995, 1996 Patents Pending
7032 -1.1 6/17/97 T1/C0/D0 SH
1
Characteristics subject to change without notice
64K
32K
16K
X25648/49,
X25328/29,
X25168/69
8K x 8 Bit
4K x 8 Bit
2K x 8 Bit
VCC Supervisory Circuit w/Serial E
2PROM
FEATURES
• Low Vcc Detection and Reset Assertion
—Reset Signal Valid to Vcc=1V
• Save Critical Data With Block LockTM Protection
—Block LockTM Protect 0, 1/4, 1/2 or all of
Serial E2PROM Memory Array
• In Circuit Programmable ROM Mode
• Long Battery Life With Low Power Consumption
—<1
µA Max Standby Current
—<5mA Max Active Current during Write
—<400
µA Max Active Current during Read
• 1.8V to 3.6V, 2.7V to 5.5V and 4.5V to 5.5V Power
Supply Operation
• 2MHz Clock Rate
• Minimize Programming Time
—32 Byte Page Write Mode
—Self-Timed Write Cycle
—5ms Write Cycle Time (Typical)
• SPI Modes (0,0 & 1,1)
• Built-in Inadvertent Write Protection
—Power-Up/Power-Down Protection Circuitry
—Write Enable Latch
—Write Protect Pin
• High Reliability
• Available Packages
—14-Lead SOIC (X2564X)
—14-Lead TSSOP (X2532X, X2516X)
—8-Lead SOIC (X2532X, X2516X)
DESCRIPTION
These devices combines two popular functions, Supply
Voltage Supervision and Serial E2PROM Memory in one
package. This combination lowers system cost, reduces
board space requirements, and increases reliability.
The user’s system is protected from low voltage condi-
tions by the devices low Vcc detection circuitry. When
Vcc falls below the minimum Vcc trip point, the system is
reset. RESET/RESET is asserted until Vcc returns to
proper operating levels and stabilizes.
The memory portion of the device is a CMOS Serial
E2PROM array with Xicor’s Block LockTM Protection. The
array is internally organized as x 8. The device features a
Serial Peripheral Interface (SPI) and software protocol
allowing operation on a simple four-wire bus.
The device utilizes Xicor’s proprietary Direct WriteTM cell,
providing a minimum endurance of 100,000 cycles per
sector and a minimum data retention of 100 years.
BLOCK DIAGRAM
DATA
REGISTER
COMMAND
DECODE &
CONTROL
LOGIC
RESET
CONTROL
LOW
VOLTAGE
SENSE
PROGRAMMING,
BLOCK LOCK &
ICP ROM CONTROL
X - DECODE
LOGIC
STATUS
REGISTER
PAGE DECODE LOGIC
SERIAL
E2PROM
ARRAY
HIGH
VOLTAGE
CONTROL
SI
SO
SCK
CS
RESET/RESET
VCC
WP
7036 FRM 01
32
8


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