MCP79510-I/MS

Real Time Clock Overview

The MCP79510-I/MS is a Real-Time Clock/Calendar (RTCC) integrated circuit manufactured by Microchip Technology. It operates within an industrial temperature range of -40°C to +85°C and supports a primary supply voltage of 1.8V to 3.6V, with backup support from 1.3V to 3.6V. The device features a 64-byte battery-backed SRAM and 1 Kbit EEPROM. Communication is handled via an SPI interface with clock rates up to 5 MHz. Timekeeping includes hundredths of seconds, leap year compensation through 2399, and dual programmable alarms.

Real Time Clock Feature Summary

• Integrated RTCC tracking time down to hundredths of seconds with automatic leap year compensation.
• Includes 64 bytes of battery-backed SRAM and 1 Kbit EEPROM for data storage.
• Features on-chip digital trimming for oscillator calibration with ±1 ppm resolution.
• Supports power-fail timestamping to log switchover events between main and backup power.

Real Time Clock Applications

• Industrial systems requiring precise timekeeping over wide temperature ranges.
• Data logging devices needing non-volatile memory retention during power loss.
• Battery-operated equipment utilizing low-power RTC modes.

Real Time Clock Procurement Notes

Verify the specific suffix 'I/MS' confirms the Industrial temperature grade (-40°C to +85°C) and MSOP package. Ensure the base part number corresponds to the MCP7951X family with 1 Kbit EEPROM rather than the MCP7952X variant which contains 2 Kbit. Confirm compatibility with the host microcontroller's SPI voltage levels.

Real Time Clock Selection Notes

Select this component when a compact 10-lead MSOP package is required for space-constrained designs. Choose the MCP79510 specifically if 1 Kbit of EEPROM is sufficient, as opposed to the MCP79511 which includes a pre-programmed EUI-48 address. Verify that the application requires the specific 64-byte SRAM size provided by this model.

Real Time Clock Part Context

This component belongs to the MCP795XX family of battery-backed SPI RTCCs. The MCP79510 variant is distinguished by its 1 Kbit EEPROM capacity and lack of a factory-programmed unique ID, unlike the MCP79511 or MCP79512 models. It shares the same pinout and core functionality with the MCP79520, differing only in EEPROM size.

Real Time Clock Replacement Considerations

The MCP79511-I/MS serves as a direct functional substitute if an EUI-48 MAC address is acceptable. The MCP79520T-I/MS offers identical timing features but provides 2 Kbit of EEPROM instead of 1 Kbit. Both alternatives maintain the same MSOP package and electrical specifications.