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X25644 Datasheet

Part Number X25644
Manufacturers Xicor
Logo Xicor
Description Programmable Watchdog Timer w/Serial E 2 PROM
Datasheet X25644 DatasheetX25644 Datasheet (PDF)

64K 32K 16K X25644/46 X25324/26 X25164/66 Programmable Watchdog Timer w/Serial E2PROM DESCRIPTION 8K x 8 Bit 4K x 8 Bit 2K x 8 Bit FEATURES • Programmable Watchdog Timer with Reset Assertion —Reset Signal Valid to Vcc=1V —Power Up Reset Control • 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 —<50µA Max Standby Current, Watchdog On —<1µA Max.

  X25644   X25644






Part Number X25649
Manufacturers Xicor
Logo Xicor
Description V CC Supervisory Circuit w/Serial E 2 PROM
Datasheet X25644 DatasheetX25649 Datasheet (PDF)

64K 32K 16K FEATURES X25648/49, X25328/29, X25168/69 VCC Supervisory Circuit w/Serial E2PROM DESCRIPTION 8K x 8 Bit 4K x 8 Bit 2K x 8 Bit • 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 —<1µA Max Standby Current —<5mA Max Active Current during Write —<400µA Max Active Cur.

  X25644   X25644







Part Number X25648
Manufacturers Xicor
Logo Xicor
Description V CC Supervisory Circuit w/Serial E 2 PROM
Datasheet X25644 DatasheetX25648 Datasheet (PDF)

64K 32K 16K FEATURES X25648/49, X25328/29, X25168/69 VCC Supervisory Circuit w/Serial E2PROM DESCRIPTION 8K x 8 Bit 4K x 8 Bit 2K x 8 Bit • 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 —<1µA Max Standby Current —<5mA Max Active Current during Write —<400µA Max Active Cur.

  X25644   X25644







Part Number X25646
Manufacturers Xicor
Logo Xicor
Description Programmable Watchdog Timer w/Serial E 2 PROM
Datasheet X25644 DatasheetX25646 Datasheet (PDF)

64K 32K 16K X25644/46 X25324/26 X25164/66 Programmable Watchdog Timer w/Serial E2PROM DESCRIPTION 8K x 8 Bit 4K x 8 Bit 2K x 8 Bit FEATURES • Programmable Watchdog Timer with Reset Assertion —Reset Signal Valid to Vcc=1V —Power Up Reset Control • 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 —<50µA Max Standby Current, Watchdog On —<1µA Max.

  X25644   X25644







Part Number X25645
Manufacturers Xicor
Logo Xicor
Description Programmable Watchdog Timer & V CC Supervisory Circuit w/Serial E 2 PROM
Datasheet X25644 DatasheetX25645 Datasheet (PDF)

64K 32K 16K FEATURES X25643/45 X25323/25 X25163/65 DESCRIPTION 8K x 8 Bit 4K x 8 Bit 2K x 8 Bit Programmable Watchdog Timer & VCC Supervisory Circuit w/Serial E2PROM • Programmable Watchdog Timer • 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 —<50µA Max Standby Current, .

  X25644   X25644







Programmable Watchdog Timer w/Serial E 2 PROM

64K 32K 16K X25644/46 X25324/26 X25164/66 Programmable Watchdog Timer w/Serial E2PROM DESCRIPTION 8K x 8 Bit 4K x 8 Bit 2K x 8 Bit FEATURES • Programmable Watchdog Timer with Reset Assertion —Reset Signal Valid to Vcc=1V —Power Up Reset Control • 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 —<50µA Max Standby Current, Watchdog On —<1µA Max Standby Current, Watchdog Off —<5mA Max Active Current during Write —<400µA 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) BLOCK DIAGRAM SI SO SCK CS RESET/RESET DATA REGISTER COMMAND DECODE & CONTROL LOGIC RESET CONTROL These devices combine two popular functions, Watchdog Timer, and Serial E2PROM Memory in one package. This combination lowers system cost, reduces board space requirements, and increases reliability. The Watchdog Timer provides an independent protection mechanism for microcontrollers. During a system failure, the device will .


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