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X25166S14I-1.8 Datasheet(PDF) 1 Page - Xicor Inc. |
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X25166S14I-1.8 Datasheet(HTML) 1 Page - Xicor Inc. |
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1 / 15 page  ©Xicor, Inc. 1994, 1995, 1996 Patents Pending 7050 -1.0 6/20/97 T0/C0/D0 SH 1 Characteristics subject to change without notice 64K 32K 16K X25644/46 X25324/26 X25164/66 8K x 8 Bit 4K x 8 Bit 2K x 8 Bit Programmable Watchdog Timer w/Serial E2PROM 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 —<50 µA Max Standby Current, Watchdog On —<1 µA Max Standby Current, Watchdog Off —<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 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 respond with a RESET/RESET signal after a selectable time-out interval. The user selects the interval from three preset values. Once selected, the interval does not change, even after cycling the power. 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 WRITE, BLOCK LOCK & ICP ROM CONTROL X - DECODE LOGIC STATUS REGISTER WATCHDOG PAGE DECODE LOGIC SERIAL E2PROM ARRAY HIGH VOLTAGE CONTROL SI SO SCK CS RESET/RESET WP 7029 FRM 01 32 8 TIMER |
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