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Product Detailed Parameters
- Description：IC RTC CLK/CALENDAR SPI 16SOIC
- Series：-
- Package：Tape & Reel (TR)
- 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：16-SOIC (0.295", 7.50mm Width)
- Supplier Device Package：16-SOIC
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Overview
The CDP68HC68T1M296 is a CMOS serial real-time clock (RTC) integrated circuit manufactured by Renesas Electronics Corporation. It provides comprehensive timekeeping and calendar functions, including seconds, minutes, hours, day of the week, date, month, and year with automatic leap year compensation. The device integrates 32 bytes of static RAM for data storage and features a 3-wire Serial Peripheral Interface (SPI) for communication. It supports low minimum standby voltage operation down to 2.2V and includes power loss detection capabilities to maintain timekeeping during primary power failures.
Feature Summary
- Integrated SPI interface for serial data transfer
- 32-byte static RAM for user data storage
- Automatic leap year calculation and full calendar functions
- Low standby voltage capability (2.2V minimum)
- Power loss detection and alarm interrupt modes
Applications
- Real-time clock modules in embedded systems
- Data logging devices requiring timestamping
- Battery-backed timekeeping circuits
- Industrial control systems with SPI connectivity
Procurement Notes
Verify component authenticity through authorized distributors. Confirm RoHS compliance status as per current manufacturing standards. Check for end-of-life notices or obsolescence announcements from Renesas Electronics prior to procurement planning. Ensure supply chain stability for long-term production requirements.
Selection Notes
Select this component when an SPI-based RTC with integrated RAM is required. Verify that the system operates within the specified voltage range of 2.2V to 6V. Ensure the microcontroller supports the 3-wire SPI protocol. Consider the 20-SOIC package dimensions for PCB layout constraints.
Part Context
This part belongs to the CDP68HC68 series of real-time clocks. It is functionally similar to the CDP68HC68T1 but may differ in packaging or specific suffix designations. The series is designed for applications requiring accurate timekeeping with minimal external components.
Replacement Considerations
Direct replacements include other parts from the CDP68HC68 family such as CDP68HC68T1MZ. Verify pin compatibility and software register mapping before substitution. Consult Renesas documentation for any functional differences between suffix variants.
FAQ
What is the maximum standby voltage for the CDP68HC68T1M296?
The maximum operating voltage is 6V, while the minimum standby voltage for timekeeping is 2.2V.
Does the CDP68HC68T1M296 support automatic leap year correction?
Yes, the device automatically calculates leap years for accurate date tracking.
How many bytes of RAM are included in the CDP68HC68T1M296?
The IC includes 32 bytes of static RAM for general-purpose data storage.
