The 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 techno– logy. Memory interface is via a 400kHz I2C bus. The CAT1026 and CAT1027 provide a precision VCC sense circuit with five reset threshold voltage options that support 5V, 3.3V and 3V systems. The power supply monitor and reset circuit protects memory and systems controllers during power up/down and against brownout conditions. If power supply voltages are out of normal range, a reset is triggered to protect the system. Reset voltage may be configured externally via an external pin.
The CAT1026 and CAT1027 provide precision Vcc monitoring and reset control for microcontroller‑based systems. They integrate a 2 k‑bit serial EEPROM and a power supervisor with brown‑out protection, operating over a 2.7 V to 5.5 V supply range.
Key features include five selectable reset thresholds, an auxiliary voltage monitor (Vsense), a watchdog timer on the CAT1027, and a variety of 8‑pin packages (DIP, SOIC, TSSOP, MSOP, TDFN). The devices are RoHS‑compliant and rated for industrial and extended temperature ranges.
| Operating Voltage Range | 2.7 V to 5.5 V |
|---|---|
| Industrial Temperature Range | -40 °C to 85 °C |
| Extended Temperature Range | -40 °C to 125 °C |
| Program/Erase Cycle Endurance | 1,000,000 cycles |
| Data Retention | 100 years |
The CAT1026 and CAT1027 operate from 2.7 V to 5.5 V.
The integrated EEPROM is rated for up to 1,000,000 program/erase cycles.
Industrial devices operate from –40 °C to 85 °C, while extended‑range devices operate from –40 °C to 125 °C.