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Product Detailed Parameters
- Description：IC RTC CLK/CALENDAR PAR 28TSSOP
- Series：-
- Package：Tape & Reel (TR),Cut Tape (CT),Bulk
- Mfr：Texas Instruments
- Type：Clock/Calendar
- Features：Alarm, Daylight Savings, Leap Year, Supervisor, Watchdog Timer
- Memory Size：-
- Time Format：HH:MM:SS (12/24 hr)
- Date Format：YY-MM-DD-dd
- Interface：Parallel
- Voltage - Supply：2.7V ~ 3.6V
- Voltage - Supply, Battery：2.4V ~ 4V
- Current - Timekeeping (Max)：1.5mA (Typ) @ 2.7 V ~ 3.6 V
- Operating Temperature：0°C ~ 70°C
- Mounting Type：Surface Mount
- Package / Case：28-TSSOP (0.173", 4.40mm Width)
- Supplier Device Package：28-TSSOP
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Overview
The BQ4802LYPWR is a parallel real-time clock (RTC) integrated circuit manufactured by Texas Instruments. It provides timekeeping and calendar functions with a date format of YY-MM-DD-dd and time format of HH:MM:SS (24-hour). The device operates on a supply voltage range of 2.7 V to 3.6 V and features backup switching for continuous operation. It includes 16 bytes of non-volatile SRAM storage. The component is housed in a TSSOP-28 package, supports surface mount installation, and functions within an operating temperature range of 0°C to +70°C.
Feature Summary
- Parallel RTC interface with CPU supervisor capabilities
- Integrated 16-byte NV SRAM for data storage
- Backup switching mechanism ensures uninterrupted timekeeping
- Calendar and alarm functionality with leap year compensation
Applications
- Industrial control systems requiring precise time synchronization
- Data logging equipment needing non-volatile timestamping
- Embedded systems with parallel bus architectures
Procurement Notes
The BQ4802LYPWR is designated as an End-of-Life (EOL) product. Manufacturers have issued discontinuation notifications indicating that production will cease, and the component will become obsolete. Buyers should verify current stock availability through authorized distributors and prepare for potential supply chain constraints or substitution requirements due to the active phase-out status.
Selection Notes
Select this component only if a parallel interface is compatible with the host system architecture. Verify that the 2.7 V to 3.6 V supply voltage range aligns with the target application's power rails. Consider the TSSOP-28 package dimensions for PCB layout compatibility. Due to the EOL status, evaluate alternative components with similar specifications and longer lifecycle support for new designs.
Part Context
The BQ4802LYPWR belongs to the BQ4802 family of parallel real-time clocks from Texas Instruments. This series is designed for applications requiring robust timekeeping with integrated memory. The 'LY' suffix typically denotes specific temperature and packaging variants within the family. The 'PWR' suffix indicates the TSSOP-28 tape and reel packaging configuration.
Replacement Considerations
Publicly confirmed substitute part numbers are not available in the provided documentation. Given the End-of-Life status, engineers must identify equivalent parallel RTCs with comparable voltage ranges and package types through independent cross-reference tools.
