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CAT1162LI-28-GT2 データシート(PDF) 1 Page - Catalyst Semiconductor |
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CAT1162LI-28-GT2 データシート(HTML) 1 Page - Catalyst Semiconductor |
1 / 14 page CAT1161, CAT1162 © 2007 Catalyst Semiconductor, Inc. 1 Doc. No. 3002 Rev. F Characteristics subject to change without notice Supervisory Circuits with I 2C Serial CMOS EEPROM, Precision Reset Controller and Watchdog Timer (16K) FEATURES Watchdog monitors SDA signal (CAT1161) 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 CAT1161/2 is a complete memory and supervi- sory solution for microcontroller-based systems. A se- rial 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 CAT1161 watchdog monitors the SDA line, making an additional PC board trace unnecessary. The lower cost CAT1162 does not have a watchdog timer. 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 a debounced input for push- button manual reset capability. The CAT1161/2 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 DC 1 8 VCC RESET ¯¯¯¯¯¯ 2 7 RESET WP 3 6 SCL GND 4 5 SDA CAT1161 CAT1162 PIN FUNCTIONS Pin Name Function DC Do not Connect 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 |
同様の部品番号 - CAT1162LI-28-GT2 |
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同様の説明 - CAT1162LI-28-GT2 |
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