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CAT1163WI-30-GT3 Datasheet(PDF) 1 Page - Catalyst Semiconductor |
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CAT1163WI-30-GT3 Datasheet(HTML) 1 Page - Catalyst Semiconductor |
1 / 14 page ![]() CAT1163 © 2007 Catalyst Semiconductor, Inc. 1 Doc. No. 3003 Rev. E Characteristics subject to change without notice Supervisory Circuits with I 2C Serial Serial CMOS EEPROM, Precision Reset Controller and Watchdog Timer (16K) FEATURES Watchdog timer input (WDI) 400kHz I 2C bus compatible 2.7V to 6.0V operation Low power CMOS technology 16-Byte page write buffer Built-in inadvertent write protection — VCC lock out — Write protect pin, WP Active high or low reset — Precision power supply voltage monitor — 5V, 3.3V and 3V systems — Five threshold voltage options 1,000,000 Program/Erase cycles Manual reset 100 Year data retention 8-pin DIP or 8-pin SOIC Commercial and industrial temperature ranges For Ordering Information details, see page 13. DESCRIPTION The CAT1163 is a complete memory and supervisory solution for microcontroller-based systems. A serial EEPROM memory (16K) with hardware memory write protection, a system power supervisor with brown out protection and a watchdog timer are integrated together in low power CMOS technology. Memory interface is via an I 2C bus. The 1.6-second watchdog circuit returns a system to a known good state if a software or hardware glitch halts or “hangs” the system. The CAT1163 watchdog monitors the WDI input pin. The power supply monitor and reset circuit protects memory and system controllers during power up/down and against brownout conditions. Five reset threshold voltages support 5V, 3.3V and 3V systems. If power supply voltages are out of tolerance reset signals become active, preventing the system microcontroller, ASIC or peripherals from operating. Reset signals become inactive typically 200ms after the supply voltage exceeds the reset threshold level. With both active high and low reset signals, interface to microcontrollers and other ICs is simple. In addition, a reset pin can be used as debounced input for push- button manual reset capability. The CAT1163 memory features a 16-byte page. In addition, hardware data protection is provided by a write protect pin WP and by a VCC sense circuit that prevents writes to memory whenever VCC falls below the reset threshold or until VCC reaches the reset threshold during power up. Available packages include an 8-pin DIP and a surface mount, 8-pin SO package. PIN CONFIGURATION PDIP 8 Lead SOIC 8 Lead WDI 1 8 VCC RESET ¯¯¯¯¯¯ 2 7 RESET WP 3 6 SCL GND 4 5 SDA CAT1163 PIN FUNCTIONS Pin Name Function WDI Warchdog Timer Input RESET ¯¯¯¯¯¯ Active Low Reset I/O WP Write Protect GND Ground SDA Serial Data/Address SCL Clock Input RESET Active High Reset I/O VCC Power Supply |
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