CDP68HC68T1EZ

Overview

The CDP68HC68T1EZ is a Real-Time Clock (RTC) integrated circuit manufactured by Renesas Electronics Corporation. It provides clock/calendar functionality, including seconds, minutes, hours, day of week, date, month, and year, with automatic leap year compensation. The device features a 32-byte static RAM and communicates via a 3-wire Serial Peripheral Interface (SPI). It operates on a supply voltage of 3V to 6V and supports a low minimum standby voltage of 2.2V for timekeeping. The component is housed in a 16-pin Dual In-line Package (DIP) with a 0.300-inch width.

Feature Summary

• Integrated SPI interface for serial data communication
• 32-byte static RAM for system data storage
• Automatic leap year calculation and BCD format output
• Programmable alarm and periodic interrupt modes

Applications

• Computer systems requiring precise timekeeping
• Industrial control units with power-down detection needs
• Embedded devices utilizing SPI bus architecture

Procurement Notes

Verify the specific suffix 'E' against official documentation to confirm RoHS compliance status, as some sources indicate non-compliance for this family. Confirm package dimensions match the 16-DIP specification. Check current production status as the base model has been subject to product change notices.

Selection Notes

Select this component when an SPI-based RTC with integrated RAM is required. Ensure the system design accommodates the 3V to 6V operating range. Verify that the 16-pin DIP package fits the target PCB layout. Consider the 2.2V backup battery requirement for continuous operation during main power loss.

Part Context

This part belongs to the CDP68HC68T1 family of real-time clocks. The 'E' suffix typically denotes environmental compliance or specific packaging variations within the manufacturer's lineup. It serves as a direct replacement for earlier versions like the CDP68HC68T1 in designs requiring SPI connectivity instead of parallel interfaces.

Replacement Considerations

Direct pin-compatible replacements may include other variants within the CDP68HC68 series. Verify electrical parameters such as supply voltage and interface compatibility before substitution.