CAT1026 and CAT1027 are complete memory and supervisory solutions for microcontroller-based systems. A 2k-bit serial EEPROM memory and a system power supervisor with brown-out protection are integrated together in low power CMOS technology. Memory interface is via a 400kHz I2C bus.
The CAT1026 and CAT1027 are dual‑voltage supervisory circuits that integrate a 2 k‑bit serial EEPROM and a power‑monitoring reset controller. They support 3 V, 3.3 V and 5 V systems, offer five selectable reset‑threshold voltages, and include an auxiliary voltage monitor and, for the CAT1027, a 1.6 s watchdog timer.
Available in multiple 8‑pin packages (DIP, SOIC, TSSOP, MSOP, TDFN), the devices operate from –40 °C to 125 °C (extended range) and provide low‑power operation with typical standby currents in the tens of microamps.
| EEPROM size | 2 k‑bit serial EEPROM |
|---|---|
| Supply voltage range | 3.0 V to 5.5 V |
| Watchdog timer timeout (CAT1027) | 1.6 seconds |
| Reset threshold options | Five selectable voltages |
| Package types | 8‑pin DIP, SOIC, TSSOP, MSOP, TDFN |
The devices operate from 3.0 V up to 5.5 V.
Five selectable threshold voltage options are provided.
They are available in 8‑pin DIP, SOIC, TSSOP, MSOP and TDFN packages.
The watchdog timer times out after 1.6 seconds of inactivity.