ChipApex | Global Electronic Components Supplier
SEARCH
Search Product
Search Post
— IC芯片 | 连接器 | 传感器 | 被动器件 —
Consult the customer manager about the wholesale price.
consultation hotline：86-132-6715-2157
email：[email protected]
Contact the product manager for consultation. One-stop consultation is available.
Do you want a lower wholesale price? Please send us your inquiry and we will reply immediately.
Product Detailed Parameters
- Description：IC RTC CLK/CALENDAR I2C 8VSON
- Series：-
- Package：Tape & Reel (TR),Cut Tape (CT)
- Mfr：Rohm Semiconductor
- Type：Clock/Calendar
- Features：Alarm, Leap Year
- Memory Size：-
- Time Format：HH:MM:SS (12/24 hr)
- Date Format：YY-MM-DD-dd
- Interface：I2C, 2-Wire Serial
- Voltage - Supply：1.8V ~ 5.5V
- Voltage - Supply, Battery：-
- Current - Timekeeping (Max)：1µA ~ 1.35µA @ 3V ~ 5.5V
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：8-UFDFN Exposed Pad
- Supplier Device Package：VSON008X2030
Download product information
Overview
The BU9873NUX-TTR is a Real-Time Clock (RTC) integrated circuit manufactured by ROHM Semiconductor. It features an I2C bus serial interface for communication with host processors. The device operates within a supply voltage range of 1.8 V to 5.5 V and supports timekeeping current consumption as low as 1 µA at 3 V. It provides clock/calendar functions including hours, minutes, seconds, days, months, years, and leap year compensation up to the year 2099. The component is housed in an 8-pin VSON package (VSON008X2030) suitable for surface mount applications.
Feature Summary
- I2C Bus Interface: Supports standard mode (up to 100 kHz) and fast mode (up to 400 kHz) communication protocols.
- Calendar Functionality: Automatically accounts for varying month lengths and leap years through the year 2099.
- Low Power Consumption: Typical timekeeping current is 1 µA at 3 V, with maximum access current of 1.35 µA at 5.5 V.
- Compact Packaging: Delivered in an 8-UFDFN (VSON008X2030) surface-mount package with exposed pad.
Applications
- Portable electronic devices requiring precise timekeeping with minimal power drain.
- Embedded systems utilizing I2C communication for date and time logging.
- Battery-operated equipment where low standby current is critical.
Procurement Notes
Verify the specific ordering suffix and tape/reel specifications against the manufacturer's latest datasheet before procurement. Confirm that the VSON008X2030 package dimensions align with the target PCB footprint design. Ensure compatibility with the system's I2C voltage levels, as the device supports a wide input range from 1.8 V to 5.5 V.
Selection Notes
Select this component when an I2C-compatible RTC with ultra-low power consumption is required in a small form factor. The BU9873NUX-TTR is appropriate for designs needing automatic leap year correction and alarm/periodic interrupt capabilities. Compare against other ROHM RTC models if higher speed interfaces or different package types are necessary for the application constraints.
Part Context
This part belongs to the BU9873 series of real-time clocks from ROHM Semiconductor. It shares functional similarities with other members of the family but is distinguished by its specific VSON008X2030 packaging and I2C interface configuration. The series is designed for general-purpose timekeeping in consumer and industrial electronics.
Replacement Considerations
Direct pin-to-pin replacements within the same package and interface type should be verified against the official substitution list. Alternative RTCs must match the I2C protocol, voltage range (1.8–5.5 V), and calendar functionality. Cross-reference with similar ROHM parts like the BU9873FJ for package differences.
