M48T02-150PC1

Real Time Clock Overview

The M48T02-150PC1 is a 16 Kbit (2 Kb x 8) non-volatile static RAM and real-time clock manufactured by STMicroelectronics. It operates at a typical access time of 150 ns with a supply voltage range of 4.75 V to 5.5 V. The device integrates an ultra-low power SRAM, a quartz crystal, and a long-life lithium button cell within a specialized 24-pin CAPHAT™ DIP package. This integration provides a self-contained battery-backed memory solution that maintains data for at least 10 years in the absence of power across the commercial temperature range of 0°C to 70°C.

Real Time Clock Feature Summary

• Integrated TIMEKEEPER® SRAM with built-in real-time clock functionality
• Self-contained lithium battery and quartz crystal in CAPHAT™ DIP package
• Automatic power-fail chip deselect and write protection
• Pin and function compatible with JEDEC standard 2 Kb x 8 SRAMs

Real Time Clock Applications

• Communication equipment requiring persistent timekeeping
• Network infrastructure devices needing non-volatile configuration storage
• Industrial control systems with power interruption risks

Real Time Clock Procurement Notes

Verify the specific suffix '150' confirms the 150 ns access speed variant. Confirm the 'PC1' suffix indicates the PDIP-24 CAPHAT™ package with lead-free second-level interconnect compliance. Ensure the order specifies the commercial temperature grade (0°C to +70°C) rather than extended industrial ranges if applicable. Check RoHS status as lead-free compliant per manufacturer documentation.

Real Time Clock Selection Notes

Select this component when a drop-in replacement for standard 2Kx8 SRAM is required alongside real-time clock capabilities. The integrated battery eliminates external power management circuits for backup. Consider the physical dimensions of the 600 mil DIP package for PCB layout constraints. Verify that the 150 ns access time meets system timing requirements compared to faster NVRAM alternatives.

Real Time Clock Part Context

This part belongs to the M48T02/12 TIMEKEEPER® family, which combines non-volatile memory with RTC functions. It serves as a pin-compatible alternative to legacy SRAMs like the DS1642, offering PROM-like non-volatility without special write timing limitations. The CAPHAT™ packaging technology uniquely houses the silicon, crystal, and battery in a single dual-inline package.

Real Time Clock Replacement Considerations

The M48T02-150PC1 is functionally equivalent to the Dallas Semiconductor DS1642. It can replace other JEDEC standard 2 Kb x 8 SRAMs where non-volatility is required. Verify socket compatibility as it fits many ROM, EPROM, and EEPROM sockets.