M48T02-200PC1

Real Time Clock Overview

The M48T02-200PC1 is a non-volatile static RAM and real-time clock (RTC) manufactured by STMicroelectronics. It integrates a 2 Kb x 8 SRAM array with timekeeping capabilities, housed in a 24-pin CAPHAT DIP package containing an integrated quartz crystal and lithium battery. The device operates within a supply voltage range of 4.5 V to 5.5 V. It provides BCD-coded year, month, day, date, hours, minutes, and seconds data. The component features automatic power-fail chip deselect and write protection, ensuring data integrity during voltage drops.

Real Time Clock Feature Summary

• Integrated 2 Kb x 8 non-volatile SRAM with real-time clock functionality
• Self-contained CAPHAT DIP package with built-in lithium battery and quartz crystal
• Automatic power-fail deselect and write protection circuitry
• BCD-coded time and date registers for software accessibility

Real Time Clock Applications

• Industrial control systems requiring persistent timekeeping
• Embedded devices needing non-volatile data storage without special write timing
• Metering equipment maintaining operational logs during power outages

Real Time Clock Procurement Notes

Verify the specific suffix '200' against official STMicroelectronics documentation to confirm access speed and electrical characteristics, as standard M48T02 variants typically specify different cycle times. Confirm the PC1 designation corresponds to the correct lead-free CAPHAT packaging configuration. Cross-reference the part number with current manufacturer datasheets to ensure availability and compliance with RoHS standards before procurement.

Real Time Clock Selection Notes

Select this component when a pin-compatible replacement for JEDEC standard 2 Kb x 8 SRAMs is required with added non-volatility. Ensure the application environment stays within the specified operating temperature range. Verify that the system design accommodates the 24-pin DIP footprint and that the integrated battery life meets the long-term maintenance requirements of the target product.

Real Time Clock Part Context

This part belongs to the M48T02/12 TIMEKEEPER SRAM family from STMicroelectronics. These components are designed as direct functional equivalents to older DS1642 devices. The series combines memory and RTC functions into a single highly integrated solution, eliminating the need for external batteries or crystals in many applications.

Real Time Clock Replacement Considerations

The M48T02 is functionally compatible with the Dallas Semiconductor DS1642. When substituting, verify that the power-fail deselect voltage thresholds align with the system's power management logic. Ensure the replacement maintains the same 24-pin DIP physical dimensions and pinout configuration.