M48T201Y-70MH1F

Real Time Clock Overview

The M48T201Y-70MH1F is a Timekeeper RTC IC by STMicroelectronics featuring parallel interface and 44-SOH package. It operates on 4.5V to 5.5V supply with 3mA max current at 0°C to 70°C. The device integrates clock/calendar, alarms, watchdog timer, square wave output, Y2K compliance, leap year handling, and battery monitoring. It supports HH:MM:SS (24-hour) time and YY-MM-DD-dd date formats. Designed for surface mount assembly, it includes SNAPHAT socket compatibility for separate battery/crystal integration post-reflow.

Real Time Clock Feature Summary

• Integrated real-time clock with calendar, programmable alarms, watchdog timer, and square wave output
• Parallel bus interface compatible with conventional bytewide SRAM access protocols
• SNAPHAT socket design allows battery and crystal installation after surface-mount reflow process
• Year 2000 compliant with leap year correction and battery low flag indication

Real Time Clock Applications

• Embedded systems requiring non-volatile timekeeping with external SRAM backup
• Industrial control units needing watchdog timer functionality
• Consumer electronics requiring Y2K-compliant calendar functions

Real Time Clock Procurement Notes

Verify the 44-BSOP package width of 8.56mm matches PCB footprint requirements. Confirm SNAPHAT housing part number compatibility for battery/crystal assembly. Check RoHS compliance status through official ST documentation. Ensure operating temperature range of 0°C to 70°C suits application environment. Validate power supply voltage stability within 4.5V to 5.5V specification.

Real Time Clock Selection Notes

Select this component when parallel interface compatibility with existing SRAM-based designs is required. Choose over serial alternatives if higher data throughput via parallel bus is necessary. Consider the SNAPHAT feature for thermal protection of battery components during SMT processing. Verify that 3mA current consumption fits system power budget constraints.

Real Time Clock Part Context

Part of STMicroelectronics' Timekeeper series offering RTC solutions with integrated memory management capabilities. The M48T201 variant specifically targets applications needing combined timekeeping and NVRAM functionality through external SRAM control signals.

Real Time Clock Replacement Considerations

M48T201V-70MH1E offers 3.0V to 3.6V operation instead of 4.5V to 5.5V. M48T59Y-70MH1E provides 28-pin SOH package instead of 44-pin. M48T35Y-70MH1F features 256KB storage capacity in 28-pin SOX package.