MCP79510T-I/MN

The MCP79510T-I/MN is a Microchip low-power voltage supervisor with reset and watchdog features for microcontrollers. It monitors the system supply and, if the voltage falls out of range or the watchdog expires, asserts a reset to guarantee reliable MCU startup and operation. It typically provides an active-low reset output, optional manual reset input, and a watchdog timer that requires periodic refresh by software.
Key points
- Protects MCU operation during brownouts and software hangs
- Reset output (and often a manual reset input) for easy MCU integration
- Watchdog timer to force a reset if software fails to refresh
- Designed for low quiescent current and single-supply operation
- Available in industrial temperature grades and various 8-pin package options (indicated by -I/MN, -T, etc.)
Typical use
- Microcontroller reset on power-up/power-down
- System reliability in embedded and battery-powered devices
- Automotive and industrial electronics requiring robust reset control
Note: for exact voltage thresholds, timing, pinout, and package details, consult the MCP79510T-I/MN datasheet.

Key features of the MCP79510T-I/MN (I2C RTC with backup RAM):
- I2C real-time clock with timekeeping registers (seconds, minutes, hours, day, date, month, year)
- 32.768 kHz crystal input for accurate time; supports external oscillator
- Automatic power-fail/BACKUP switchover to non-volatile RAM during main-power loss
- Battery-backed NV RAM (data retention in backup mode)
- 1 Hz output and programmable square-wave/alarms
- Leap-year correction, 12/24-hour formats
- Wide operating voltage: 2.0V–5.5V
- Industrial temperature range: -40°C to +85°C
- Compact package (I/MN variant: industrial temp, package type; Tape & Reel option available)
Note: The device is designed for low power in backup mode and provides timekeeping with optional alarm/timer features and NV data storage.

An 8-pin plastic SOIC (surface-mount) package.

Manufacturer: Microchip Technology Inc. (Microchip).
Type of company: A global, publicly traded semiconductor company that designs and manufactures microcontrollers (PIC, AVR), analog and mixed‑signal components, timing and memory devices, power and wireless solutions for embedded, automotive, industrial, and consumer markets; headquartered in Chandler, Arizona.

- Microcontroller reset supervision and watchdog in embedded systems
- Brown-out/Power-on reset for battery-powered/portable devices
- Automotive electronics and industrial automation/sensor networks
- Data-logging, IoT nodes, and consumer electronics needing robust reset during supply fluctuations

Possible equivalents (RTC, I2C, 32kHz crystal, battery backup):
- DS3231 (Maxim)
- DS1307 (Maxim)
- PCF8563 (NXP)
- RV-3028-C7 (Micro Crystal)
- ISL1208 (Intersil)
For Microchip-specific alternatives, consider MCP7940N family (similar RTCs).