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Product Detailed Parameters
- Description：IC RTC CLK/CALENDAR SPI 20SOIC
- Series：-
- Package：Tube
- Mfr：Renesas Electronics Corporation
- Type：Clock/Calendar
- Features：Alarm, Leap Year, Square Wave Output, Watchdog Timer
- Memory Size：32B
- Time Format：HH:MM:SS (12/24 hr)
- Date Format：YY-MM-DD-dd
- Interface：SPI
- Voltage - Supply：3V ~ 6V
- Voltage - Supply, Battery：2.2V ~ 6V
- Current - Timekeeping (Max)：20µA ~ 500µA @ 5V
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：20-SOIC (0.295", 7.50mm Width)
- Supplier Device Package：20-SOIC
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Overview
The CDP68HC68T1MZ is a Real-Time Clock (RTC) integrated circuit manufactured by Renesas Electronics Corporation. It features an SPI interface and includes 32 bytes of storage capacity for timekeeping data. The device supports clock/calendar functions with a time format of HH:MM:SS in both 12-hour and 24-hour modes, and a date format of YY-MM-DD-dd. It operates within a supply voltage range of 3V to 6V and draws a maximum current of 500µA at 5V. The component is housed in a 20-SOIC package with a width of 7.50mm and is rated for operation between -40°C and 85°C.
Feature Summary
- Integrated SPI interface for serial communication
- Includes alarm function, leap year adjustment, square wave output, and watchdog timer
- Supports 32 bytes of non-volatile memory for calendar and time data
Applications
- Systems requiring precise timekeeping via SPI bus
- Embedded devices needing calendar and alarm functionalities
- Industrial equipment operating in extended temperature ranges
Procurement Notes
The CDP68HC68T1MZ is listed as obsolete or end-of-life by the manufacturer. Verification of availability through authorized distributors is required. Check for product change notices regarding packaging or labeling updates. Ensure compatibility with existing system designs before sourcing alternatives.
Selection Notes
Select this component only if SPI interface compatibility and 20-SOIC packaging are required. Verify that the 3V-6V supply range matches the system power rails. Consider the 32-byte storage limit for application data needs. Confirm that the -40°C to 85°C operating temperature range meets environmental specifications.
Part Context
This part belongs to the CDP68HC68 family of real-time clock ICs. It is designed for applications requiring accurate timekeeping with minimal microcontroller intervention. The T1 suffix typically denotes specific tape-and-reel packaging variants within the SOIC footprint.
Replacement Considerations
As the part is obsolete, verify pin-compatible or functionally equivalent RTCs from Renesas or other manufacturers. Ensure new selections support SPI interface and similar voltage ranges. Check for updated documentation and long-term availability guarantees.
