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CAT1162LI28G Datenblatt(PDF) 1 Page - ON Semiconductor |
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CAT1162LI28G Datenblatt(HTML) 1 Page - ON Semiconductor |
1 / 13 page © Semiconductor Components Industries, LLC, 2012 July, 2012 − Rev. 12 1 Publication Order Number: CAT1161/D CAT1161, CAT1162 Supervisory Circuits with I2C Serial CMOS EEPROM, Precision Reset Controller and Watchdog Timer (16K) Description The CAT1161/2 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 I2C 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 5 V, 3.3 V and 3 V 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 200 ms 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 pushbutton 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 VCCsense circuit that prevents writes to memory whenever VCCfalls 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. Features • Watchdog Monitors SDA Signal (CAT1161) • 400 kHz I2C Bus Compatible • 2.7 V to 6 V Operation • Low Power CMOS Technology • 16−Byte Page Write Buffer • Built−in Inadvertent Write Protection ♦ VCC Lock Out ♦ Write Protection Pin, WP • Active High or Low Reset ♦ Precision Power Supply Voltage Monitor ♦ 5 V, 3.3 V and 3 V 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 • These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS Compliant ORDERING INFORMATION http://onsemi.com PDIP−8 CASE 646AA SOIC−8 CASE 751BD For Ordering Information details, see page 11. 1 2 3 4 8 7 6 5 DC RESET WP GND VCC RESET SCL SDA CAT1161 CAT1162 PIN CONFIGURATION 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 |
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