M48T201Y-70MH1E

Real Time Clock Overview

The M48T201Y-70MH1E is a Real-Time Clock (RTC) integrated circuit from STMicroelectronics' Timekeeper series. It combines an RTC with programmable alarms, a watchdog timer, and a square wave output to manage up to 512 K x 8 of external low-power static RAM. The device operates on a parallel interface with a supply voltage range of 4.5V to 5.5V and draws a maximum current of 3mA. It features a 44-pin BSOP package designed for surface mount installation, requiring a separate SNAPHAT housing for battery and crystal connectivity.

Real Time Clock Feature Summary

• Integrated RTC with alarm, watchdog timer, and square wave output capabilities
• Controls up to 512 K x 8 of external SRAM via GCON and ECON signals
• Supports 44-lead BSOP package with dedicated SNAPHAT socket interface
• Includes microprocessor power-on reset valid during battery backup mode

Real Time Clock Applications

• Systems requiring non-volatile memory management with timekeeping
• Industrial equipment needing watchdog timer protection
• Embedded devices utilizing external SRAM expansion

Real Time Clock Procurement Notes

Verify the specific suffix 'E' against official STMicroelectronics documentation, as distributor listings primarily reference the 'F' variant. Confirm package availability in tape & reel format if required by automated assembly processes. Check component status as some sources indicate discontinuation within the broader M48T201 family.

Real Time Clock Selection Notes

Select this component when a parallel interface RTC with direct SRAM control is required. Ensure the design accommodates the 4.5V to 5.5V VCC range and the 44-pin BSOP footprint. Verify compatibility with the specific SNAPHAT battery/crystal housing part number, such as M4Txx-BR12SH, for proper top-mount integration after reflow soldering.

Real Time Clock Part Context

This part belongs to the M48T201 series, which integrates RTC functions with external memory control. The Y variant specifies a 4.5V to 5.5V supply voltage range, distinct from the V variant which supports lower voltages. The series is characterized by its ability to convert low-power SRAM into NVRAM through integrated battery switching and monitoring logic.

Real Time Clock Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.