M48T59Y-70MH6E

Real Time Clock Overview

The M48T59Y-70MH6E is a Real-Time Clock (RTC) IC from STMicroelectronics' Timekeeper series, featuring parallel interface and integrated battery backup. It provides clock/calendar functionality with BCD-coded timekeeping in a 28-SOH package equipped with a SNAPHAT socket for external battery/crystal modules. Operating at 4.5V to 5.5V, it includes features such as alarms, leap year compensation, and a watchdog timer. The device supports HH:MM:SS (24-hour) and YY-MM-DD-dd date formats, ensuring accurate non-volatile timekeeping in industrial applications.

Real Time Clock Feature Summary

• Integrated RTC with 8KB NV SRAM and parallel bus interface
• SNAPHAT socket compatible for external lithium battery and crystal
• Hardware features include alarm, leap year, and watchdog timer
• BCD-coded time/date registers with automatic update

Real Time Clock Applications

• Industrial control systems requiring precise time stamping
• Data logging equipment needing non-volatile calendar tracking
• Telecommunications infrastructure maintaining uptime records

Real Time Clock Procurement Notes

Verify component status as the M48T59Y series may be discontinued or subject to last-time buy notices. Confirm compatibility of the SNAPHAT housing part number (e.g., M4T28-BR12SH) for battery and crystal integration. Ensure voltage levels match system requirements before procurement.

Real Time Clock Selection Notes

Select this model for designs requiring parallel interface access to RTC data without software overhead. The SOH package allows surface mount assembly followed by SNAPHAT insertion, protecting the battery during reflow. Verify operating temperature range (-40°C to +85°C) against environmental constraints.

Real Time Clock Part Context

Part of the M48T59 family, which offers pin-compatible alternatives with varying speeds and packages. The 'Y' suffix typically denotes the version supporting lower voltage thresholds or specific battery switching characteristics compared to standard M48T59.

Real Time Clock Replacement Considerations

Direct substitutes within the same family include M48T59Y-70MH1F (commercial grade) or M48T59Y-70PC1 (DIP package). Cross-referencing with M48T02 or M48T35 may require interface adaptation due to differing memory sizes or pinouts.