CAT1027

CAT1026, CAT1027 Dual Voltage Supervisory Circuits with EEPROM Serial 2k-bit I2C Description The CAT1026 and CAT1027 are complete memory and supervisory www.onsemi.com solutions for microcontroller−based systems. A EEPROM Serial 2k−bit I2C memory and a system power supervisor with brown−out protection are integrated together in low power CMOS technology. Memory interface is via a 400 kHz I2C bus. The CAT1026 and CAT1027 provide a precision VCC sense circuit with five reset threshold voltage options that support 5 V, 3.3 V and 3 V systems. The power supply monitor and reset circuit protects SOIC−8 CASE 751BD TSSOP−8 CASE 948S memory and systems controllers during power up/down and against brownout conditions. If power supply voltages are out of tolerance reset signals become active preventing the system microcontroller, ASIC, or peripherals from operating. The CAT1026 features two open drain reset outputs: one (RESET) drives high and the other (RESET) drives low whenever VCC falls MSOP−8 CASE 846AD TDFN−8 CASE 511AL below the threshold. Reset outputs become inactive typically 200 ms after the supply voltage exceeds the reset threshold value. With both active high and low reset signals, interface to microcontrollers and other ICs is simple. CAT1027 has only a RESET output. In addition, ORDERING INFORMATION the RESET pin can be used as an input for push−button manual reset For Ordering Information details, see page 13. capability. The CAT1026 and CAT1027 ...