M48T248Y-70PM1

Real Time Clock Overview

The STMicroelectronics M48T248Y-70PM1 is a non-volatile static RAM and real-time clock (RTC) IC, marketed as a Phantom Time Chip. It features a parallel interface and is housed in a 32-DIP module package with a width of 0.600 inches (15.24mm). The device provides 128Kbit x 8 memory organization, totaling 131,072 words by 8 bits. It operates within a supply voltage range of 4.5V to 5.5V, with a maximum timekeeping current of 5mA at these voltages. The component supports date formats including YY-MM-DD-dd and includes leap year correction capabilities.

Real Time Clock Feature Summary

• Integrates non-volatile static RAM with real-time clock functionality for continuous timekeeping without external backup requirements.
• Supports standard date and time data formats with automatic leap year adjustment logic.
• Utilizes a parallel interface architecture for direct system bus connectivity.

Real Time Clock Applications

• Industrial control systems requiring persistent time-stamping
• Embedded data logging equipment
• Telecommunications infrastructure monitoring

Real Time Clock Procurement Notes

Verify the specific suffix PM1 against the manufacturer's official documentation to confirm pinout compatibility and package dimensions. Ensure the target system design accommodates the 32-DIP module form factor and parallel interface requirements. Confirm that the operating temperature range meets the application environment specifications before finalizing procurement decisions.

Real Time Clock Selection Notes

Select this component when a combined RTC and large-capacity non-volatile memory solution is required in a DIP package. The parallel interface necessitates sufficient address and data lines on the host microcontroller or processor. Consider the 5mA current consumption during active operation relative to available power budgets in the target electronic assembly.

Real Time Clock Part Context

This part belongs to the TIMEKEEPER® family of non-volatile SRAM devices from STMicroelectronics. These components are designed to maintain accurate timekeeping while providing substantial data storage capacity. The M48T248Y variant specifically offers higher memory density compared to lower-capacity models in the same series, suitable for applications needing both timestamping and significant buffer storage.

Real Time Clock Replacement Considerations

Publicly confirmed substitute part numbers include DS1248Y-70+ from Maxim Integrated. Verify electrical compatibility and pin assignment alignment before substitution. Check for any differences in access times or power management features between the original and replacement components.