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X5325 Dataheets PDF



Part Number X5325
Manufacturers Intersil Corporation
Logo Intersil Corporation
Description (X5323 / X5325) CPU Supervisor with 32Kb SPI EEPROM
Datasheet X5325 DatasheetX5325 Datasheet (PDF)

® X5323, X5325 (Replaces X25323, X25325) Data Sheet October 27, 2005 FN8131.1 CPU Supervisor with 32Kb SPI EEPROM FEATURES • Selectable watchdog timer • Low VCC detection and reset assertion —Five standard reset threshold voltages —Re-program low VCC reset threshold voltage using special programming sequence —Reset signal valid to VCC = 1V • Determine watchdog or low voltage reset with a volatile flag bit • Long battery life with low power consumption —<50µA max standby current, watchdog on —<.

  X5325   X5325



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® X5323, X5325 (Replaces X25323, X25325) Data Sheet October 27, 2005 FN8131.1 CPU Supervisor with 32Kb SPI EEPROM FEATURES • Selectable watchdog timer • Low VCC detection and reset assertion —Five standard reset threshold voltages —Re-program low VCC reset threshold voltage using special programming sequence —Reset signal valid to VCC = 1V • Determine watchdog or low voltage reset with a volatile flag bit • Long battery life with low power consumption —<50µA max standby current, watchdog on —<1µA max standby current, watchdog off —<400µA max active current during read • 32Kbits of EEPROM • Built-in inadvertent write protection —Power-up/power-down protection circuitry —Protect 0, 1/4, 1/2 or all of EEPROM array with Block Lock™ protection —In circuit programmable ROM mode • 2MHz SPI interface modes (0,0 & 1,1) • Minimize EEPROM programming time —32-byte page write mode —Self-timed write cycle —5ms write cycle time (typical) • 2.7V to 5.5V and 4.5V to 5.5V power supply operation • Available packages —14 Ld TSSOP, 8 Ld SOIC, 8 Ld PDIP • Pb-free plus anneal available (RoHS compliant) BLOCK DIAGRAM Watchdog Transition Detector WP SI SO SCK CS/WDI Data Register Command Decode & Control Logic VCC Threshold Reset Logic Protect Logic DESCRIPTION These devices combine four popular functions, Power-on Reset Control, Watchdog Timer, Supply Voltage Supervision, and Block Lock Protect Serial EEPROM Memory in one package. This combination lowers system cost, reduces board space requirements, and increases reliability. Applying power to the device activates the power-on reset circuit which holds RESET/RESET active for a period of time. This allows the power supply and oscillator to stabilize before the processor can execute code. The Watchdog Timer provides an independent protection mechanism for microcontrollers. When the microcontroller fails to restart a timer within a selectable time out interval, the device activates the RESET/RESET signal. The user selects the interval from three preset values. Once selected, the interval does not change, even after cycling the power. The device’s low VCC detection circuitry protects the user’s system from low voltage conditions, resetting the system when VCC falls below the minimum VCC trip point. RESET/RESET is asserted until VCC returns to proper operating level and stabilizes. Five industry standard VTRIP thresholds are available, however, Intersil’s unique circuits allow the threshold to be reprogrammed to meet custom requirements or to fine-tune the threshold for applications requiring higher precision. Watchdog Timer Reset RESET/RESET Status Register 8Kbits 8Kbits 16Kbits EEPROM Array Reset & Watchdog Timebase X5323 = RESET X5325 = RESET VCC VTRIP + - Power-on and Low Voltage Reset Generation 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Co.


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