M48T512Y-70PM1

Real Time Clock Overview

The M48T512Y-70PM1 is a Real-Time Clock (RTC) and non-volatile RAM device manufactured by STMicroelectronics. It integrates a calendar, timekeeping functions, and 512 Kbit of user-accessible RAM within a single component. The device utilizes a parallel bus interface for data communication and operates on a supply voltage ranging from 4.5 V to 5.5 V. It supports battery backup switching to maintain time and data retention during power loss. The unit is housed in a 32-pin Plastic Dual In-line Package (PMDIP) designed for through-hole mounting, suitable for industrial applications operating between 0°C and +70°C.

Real Time Clock Feature Summary

• Integrated Real-Time Clock with calendar (DW:DM:M:Y) and time (HH:MM:SS) formats
• 524,288-bit (64 KB) user RAM with parallel bus interface
• Battery backup switching capability for continuous operation
• 32-pin PMDIP package with through-hole installation

Real Time Clock Applications

• Industrial control systems requiring persistent timekeeping
• Data logging equipment needing non-volatile storage
• Embedded systems with parallel interface constraints

Real Time Clock Procurement Notes

Verify the specific suffix 'PM1' against the official STMicroelectronics datasheet to confirm pinout compatibility and package dimensions. Ensure the design accommodates the 4.5 V to 5.5 V operating range and the physical requirements of the 32-pin PMDIP through-hole footprint. Confirm that the parallel bus interface aligns with the host microcontroller's available resources.

Real Time Clock Selection Notes

Select this component when a combined RTC and large non-volatile memory solution is required with a parallel interface. It is appropriate for designs operating at 5V logic levels. Consider alternative packages if surface-mount technology is preferred, or different interfaces if I2C/SPI connectivity is necessary instead of parallel buses.

Real Time Clock Part Context

This part belongs to the M48T series of real-time clocks and RAM devices from STMicroelectronics. These components are designed to provide accurate timekeeping and data storage in systems where power may be interrupted. The M48T512 variant specifically offers a higher memory capacity compared to smaller variants in the same family.

Real Time Clock Replacement Considerations

Direct replacements must match the 32-pin PMDIP package, parallel interface, and 512 Kbit capacity. Verify voltage compatibility (4.5V–5.5V) and temperature range (0°C to +70°C). Cross-reference with other M48T series parts like M48T512W or M48T512Y with compatible suffixes.