CDP68HC68T1E

Overview

The CDP68HC68T1E is a Real-Time Clock (RTC) integrated circuit manufactured by Renesas Electronics Corporation, originally part of the Intersil product line. It provides clock/calendar functionality with a 32-byte user RAM buffer and communicates via an SPI serial interface. The device operates within a supply voltage range of 3V to 6V and supports battery backup from 2.2V to 6V. It features a 16-pin DIP package for through-hole mounting and functions across an industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrated RTC with calendar and 32-byte non-volatile user RAM
• SPI serial interface for data communication
• Supports alarm, leap year, square wave output, and watchdog timer functions
• Operates on 3V-6V main supply with 2.2V-6V battery backup

Applications

• Industrial systems requiring precise timekeeping
• Data logging equipment needing timestamping
• Embedded controllers utilizing SPI interfaces

Procurement Notes

This component is listed as obsolete or discontinued by major distributors. Verification of current availability requires checking specific distributor stock status. Ensure compatibility with existing PCB footprints and firmware drivers designed for the original Intersil specification before procurement attempts.

Selection Notes

Select this component only if a 16-pin DIP package and SPI interface are mandatory. Verify that the system power supply remains stable between 3V and 6V. Consider the 20µA to 500µA current consumption at 5V when designing power budgets. Confirm that the 32-byte RAM capacity meets storage requirements.

Part Context

The CDP68HC68T1E belongs to the CDP68HC68 family of real-time clocks. It shares functional similarities with other CMOS RTCs but is distinct in its SPI interface and DIP packaging. The 'E' suffix typically denotes environmental compliance or specific manufacturing lot variations, though RoHS status may vary by production date.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Engineering change notices (PCN) indicate potential label updates or device changes, necessitating direct consultation with Renesas Electronics for qualified replacements.