MCP795W10T-I/ST

Real Time Clock Overview

The MCP795W10T-I/ST is a battery-backed SPI Real-Time Clock/Calendar manufactured by Microchip Technology. It operates within an industrial temperature range of -40°C to +85°C and supports supply voltages from 1.8V to 3.6V. The device features a 1 Kbit EEPROM, 64 bytes of SRAM, and dual programmable alarms. It utilizes an SPI interface with clock rates up to 5 MHz and includes on-chip digital trimming for oscillator calibration.

Real Time Clock Feature Summary

• Real-Time Clock/Calendar tracking hundredths of seconds through year, with leap year compensation to 2399
• Integrated Watchdog Timer with dedicated output pin and Dual Configurable Event Detect Modules
• Automatic switchover to battery backup (VBAT) with power-fail timestamp logging
• On-chip digital trimming with ±1 ppm resolution and ±259 ppm range

Real Time Clock Applications

• Industrial systems requiring robust timekeeping and watchdog functionality
• Battery-powered devices needing low-power RTC operation
• Applications requiring event detection and switch debouncing

Real Time Clock Procurement Notes

Verify the 'T' suffix indicates tape-and-reel packaging when ordering. Confirm the specific package variant (SOIC or TSSOP) matches the design requirements. Ensure the industrial temperature grade (-40°C to +85°C) aligns with the operational environment. Cross-reference the datasheet revision DS20002280E for any silicon errata relevant to the production batch.

Real Time Clock Selection Notes

Select this model for applications requiring 1 Kbit EEPROM storage without pre-programmed EUI addresses. Compare against the MCP795W2X series if 2 Kbit EEPROM capacity is necessary. Consider the MCP795BXX series if 32 kHz boot-up ID functionality is required. Verify that the SPI interface speed requirements do not exceed 5 MHz at the operating voltage.

Real Time Clock Part Context

This component belongs to the MCP795WXX family of SPI RTCCs. It shares functional similarities with the MCP795W11 and MCP795W12 variants, differing primarily in the protected EEPROM configuration. The W10 variant provides blank protected EEPROM, whereas other family members may include pre-programmed EUI-48 or EUI-64 addresses.

Real Time Clock Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.