M48T512V-85PM1

Real Time Clock Overview

The M48T512V-85PM1 is a non-volatile static RAM (NVRAM) manufactured by STMicroelectronics, belonging to the M48Z series. It provides a storage capacity of 512 Kbit organized as 64K x 8 bits. The device features an 85 ns access time and operates on a single 5.0 V power supply within a range of 4.75 V to 5.5 V. Designed for parallel interface communication, it utilizes a 32-pin PLCC package suitable for surface-mount installation. The component maintains data retention without external power through an integrated battery backup mechanism.

Real Time Clock Feature Summary

• Non-volatile SRAM architecture with 512 Kbit (64K x 8) capacity
• Fast 85 ns access time for high-speed data retrieval
• Integrated battery backup circuitry for data retention
• Compatible with standard JEDEC SRAM pinouts

Real Time Clock Applications

• Industrial control systems requiring persistent configuration storage
• Telecommunications equipment needing reliable data logging
• Embedded systems with limited write cycles for EEPROM replacement

Real Time Clock Procurement Notes

Verify current availability status as this component may be subject to lifecycle changes or discontinuation. Confirm package integrity upon receipt, ensuring the 32-pin PLCC leads are undamaged. Check manufacturing date codes against project requirements to ensure material freshness. Validate RoHS compliance documentation if environmental regulations apply to the final assembly.

Real Time Clock Selection Notes

Select this part when a direct drop-in replacement for standard 5V SRAMs with non-volatility is required. Ensure the system design supports the 5V logic levels and provides a stable battery source for backup. Compare access times with other M48Z variants if higher speed is needed. Verify that the PLCC footprint matches the PCB layout constraints.

Real Time Clock Part Context

This NVRAM belongs to the M48Z family of battery-backed static RAMs from STMicroelectronics. These devices bridge the gap between volatile SRAM and slow-write EEPROMs, offering unlimited write endurance. The M48T512V variant specifically targets applications needing moderate density with fast random access capabilities in a compact surface-mount package.

Real Time Clock Replacement Considerations

Check for equivalent parts from other manufacturers such as Dallas Semiconductor (Maxim Integrated) MB92F series. Verify pin compatibility before substitution. Ensure voltage tolerances and temperature ranges match the original design specifications.