M48T128Y-70PM1

Real Time Clock Overview

The M48T128Y-70PM1 is a 1 Mbit (128K x 8) non-volatile static RAM and real-time clock integrated in a 32-DIP package. It operates on 5.0 V or 3.3 V supplies with access times of 70 ns. The device features an integrated battery backup circuit for continuous timekeeping during power loss. It supports parallel interface communication and includes power-fail control logic. The component is designed for through-hole mounting within commercial temperature ranges.

Real Time Clock Feature Summary

• Integrated real-time clock functionality with calendar capabilities
• Non-volatile SRAM architecture with unlimited write cycles
• Built-in battery backup switch for data retention
• Power-fail detection and control circuitry

Real Time Clock Applications

• Industrial control systems requiring persistent time data
• Embedded devices needing reliable non-volatile memory storage
• Telecommunications equipment with timing synchronization needs
• Consumer electronics with date/time display functions

Real Time Clock Procurement Notes

Verify the specific suffix PM1 corresponds to the 32-pin DIP package configuration required for your design. Confirm that the 70 ns access speed meets system timing constraints. Check current lifecycle status as this part may be obsolete. Ensure voltage requirements align with your 5V or 3.3V supply rails. Validate pinout compatibility if replacing existing components.

Real Time Clock Selection Notes

Choose this component when both non-volatile memory and precise timekeeping are necessary in a single package. The parallel interface suits systems without serial bus constraints. Consider the DIP form factor for prototyping or through-hole manufacturing processes. Evaluate power consumption levels against battery backup duration requirements. Assess thermal performance within the specified operating temperature range.

Real Time Clock Part Context

This part belongs to STMicroelectronics' TIMEKEEPER series, combining SRAM and RTC functions. The M48T128Y variant offers 128K x 8 organization. The -70 suffix indicates 70 nanosecond access time. The PM1 designation specifies the plastic dual in-line package type. This family targets applications needing robust data retention with accurate time tracking.

Real Time Clock Replacement Considerations

M48Z128Y-70PM1 serves as a direct functional substitute within the same product family. Verify package dimensions and pin assignments match before substitution. Ensure electrical characteristics remain compatible with existing circuit designs. Confirm availability status differs between original and replacement parts.