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X5648P Datasheet(PDF) 1 Page - Intersil Corporation |
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X5648P Datasheet(HTML) 1 Page - Intersil Corporation |
1 / 18 page 1 ® FN8136.0 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-352-6832 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2005. All Rights Reserved All other trademarks mentioned are the property of their respective owners. X5648, X5649 (Replaces X25648, X25649) CPU Supervisor with 64Kbit SPI EEPROM FEATURES •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 • 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 • 64Kbits 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-lead SOIC, 8-lead PDIP DESCRIPTION These devices combine three popular functions, Power- on Reset Control, 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 oscilla- tor to stabilize before the processor can execute code. The device’s low VCC detection circuitry protects the user’s system from low voltage conditions by holding RESET/RESET active when VCC falls below a minimum VCC trip point. RESET/RESET remains 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 in applications requiring higher precision. BLOCK DIAGRAM Data Register Command Decode & Control Logic SI SO SCK CS VCC Reset Timebase Power-on and Generation VTRIP + - RESET/RESET Reset Low Voltage Status Register Protect Logic 16Kbits 16Kbits 32Kbits WP X5648 = RESET X5649 = RESET Data Sheet March 17, 2005 |
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