MCP795W10T-I/SL

Real Time Clock Overview

The MCP795W10T-I/SL is a battery-backed SPI Real-Time Clock/Calendar (RTCC) 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, with backup support down to 1.3V. The device features 1 Kbit EEPROM, 64 bytes of SRAM, and dual programmable alarms. It utilizes a 32.768 kHz crystal or external clock input for timekeeping, offering on-chip digital trimming for frequency calibration. The component is housed in a 14-lead SOIC package.

Real Time Clock Feature Summary

• Integrated RTCC with 12/24-hour modes, leap year compensation to 2399, and hundredths-of-second tracking.
• On-chip digital trimming provides ±1 ppm resolution over a ±259 ppm adjustment range.
• Includes 64-byte battery-backed SRAM and 1 Kbit EEPROM with software write protection.
• Features dual event detect modules (high-speed and low-speed) and a programmable watchdog timer.

Real Time Clock Applications

• Electronic watches and wearable devices requiring precise timekeeping.
• Industrial systems needing power-fail timestamp logging and system robustness via watchdog timers.
• Data logging equipment utilizing the high-speed event detect module for pulse counting.

Real Time Clock Procurement Notes

Verify that the ordering suffix 'T' corresponds to tape-and-reel packaging, as standard datasheets often list tube packaging for the base part number. Confirm the specific package variant (SOIC vs. TSSOP) matches the design footprint, as the datasheet covers both 14-lead options. Ensure the 'I' suffix indicates the industrial temperature grade (-40°C to +85°C) required for the application environment.

Real Time Clock Selection Notes

Select this model for applications requiring 1 Kbit non-volatile storage and general-purpose SRAM. Choose the MCP795W10 series over the W20 series if only 1 Kbit EEPROM is needed. Consider the MCP795WX1 variants if an EUI-48 MAC address is required in the protected EEPROM area, as the W10 has blank protected memory.

Real Time Clock Part Context

This component belongs to the MCP795WXX family of SPI RTCCs. It shares functional similarities with the MCP795BXX and MCP7951X series but is distinguished by its specific EEPROM capacity and lack of pre-programmed unique IDs in the protected block. It serves as a standalone timing solution for microcontrollers lacking internal RTC peripherals.

Real Time Clock Replacement Considerations

The MCP795W10T-I/SN is a direct pin-compatible alternative in the SOIC-8 package. For designs requiring EUI-48 addressing, the MCP795W11 series is a suitable functional replacement. Verify package dimensions when substituting between SOIC and TSSOP variants.