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 PAR 28PLCC
- Series：-
- Package：Bulk
- Mfr：National Semiconductor
- Type：Clock/Calendar
- Features：Alarm, Leap Year
- Memory Size：-
- Time Format：HH:MM:SS:hh (12/24 hr)
- Date Format：YY-MM-DD-dd
- Interface：Parallel
- Voltage - Supply：4.5V ~ 5.5V
- Voltage - Supply, Battery：2.2V ~ 5.1V
- Current - Timekeeping (Max)：1µA @ 5V
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Grade：-
- Qualification：-
- Package / Case：28-LCC (J-Lead)
- Supplier Device Package：28-PLCC (11.51x11.51)
Download product information
Overview
The DP8573AVX/NOPB is a CMOS Real-Time Clock (RTC) manufactured by Texas Instruments, continuing the legacy of the National Semiconductor DP8573A series. It features a parallel interface and provides calendar and timekeeping functions with a date format of YY-MM-DD-dd and time formats supporting both 12-hour and 24-hour modes. The device includes 32 bytes of static RAM for data storage. It operates within a supply voltage range of 4.5 V to 5.5 V and supports backup switching for continuous operation during power loss. The component is housed in a PLCC-28 package and is rated for industrial temperatures from -40°C to +85°C.
Feature Summary
- Integrated calendar and clock functionality with leap-year compensation
- 32-byte static RAM for general-purpose data storage
- Parallel bus interface for direct connection to microprocessors
- Hardware backup switching capability for uninterrupted timekeeping
Applications
- Industrial control systems requiring precise time synchronization
- Data logging equipment needing non-volatile time stamps
- Embedded systems with parallel processor interfaces
Procurement Notes
Verify that the 'VX' suffix denotes the tape-and-reel packaging variant, distinct from the tube-packaged 'AV' version, while maintaining identical electrical specifications. Confirm RoHS compliance status through the manufacturer's current documentation, as NOPB indicates lead-free construction. Ensure the source document explicitly lists DP8573AVX/NOPB to validate availability and specific package type before ordering.
Selection Notes
Select this component when a parallel interface RTC is required for legacy or specific microprocessor architectures. The 5V operating voltage makes it suitable for standard logic families. Consider the PLCC-28 package constraints for PCB layout. Verify that the 32-byte RAM capacity meets system data storage requirements. Compare against newer serial-interface RTCs if pin count or board space is limited.
Part Context
This part belongs to the DP8573A family of real-time clocks. It is functionally equivalent to the DP8573AM and DP8573AV, differing primarily in packaging and reel configuration. The device is often cross-referenced with other CMOS RTCs offering similar parallel interfaces and battery-backed SRAM capabilities.
Replacement Considerations
Direct substitutes include DP8573AM and DP8573AV. Verify pin compatibility and package dimensions (PLCC-28) for any alternative components. Ensure replacement parts support the same 4.5V–5.5V supply range and parallel interface protocol.
