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Product Detailed Parameters
- Description：IC RTC CLK/CALENDAR PAR 24SSOP
- Series：-
- Package：Tube
- Mfr：Benchmarq
- Type：Clock/Calendar
- Features：Alarm, Daylight Savings, NVSRAM
- Memory Size：242B
- Time Format：HH:MM:SS (12/24 hr)
- Date Format：YY-MM-DD-dd
- Interface：Parallel
- Voltage - Supply：2.7V ~ 5.5V
- Voltage - Supply, Battery：2.4V ~ 4V
- Current - Timekeeping (Max)：100µA @ 3V
- Operating Temperature：0°C ~ 70°C
- Mounting Type：Surface Mount
- Grade：-
- Qualification：-
- Package / Case：24-SSOP (0.154", 3.90mm Width)
- Supplier Device Package：24-SSOP/QSOP
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Overview
The BQ3285LDSS is a parallel interface Real-Time Clock (RTC) and calendar integrated circuit manufactured by Benchmarq Microelectronics Inc. It operates within a supply voltage range of 2.7V to 5.5V, with battery backup support from 2.4V to 4V. The device maintains timekeeping current at a maximum of 100µA @ 3V. It features NVSRAM for data retention, alarm capabilities, and daylight savings adjustments. The component is housed in a 24-SSOP package and supports surface mount installation.
Feature Summary
- Parallel bus interface for clock/calendar operations
- Integrated NVSRAM with 242B storage capacity
- Supports HH:MM:SS time format and YY-MM-DD-dd date format
- Includes alarm and daylight savings time functions
Applications
- Embedded systems requiring precise timekeeping
- Data logging equipment needing calendar tracking
- Industrial control units with parallel bus architecture
Procurement Notes
Verify the manufacturer designation as Benchmarq Microelectronics Inc against the specific lot markings. Confirm the package type is 24-SSOP/QSOP and check RoHS compliance status, as local records indicate non-compliance for some variants. Ensure the operating temperature range meets the 0°C to 70°C requirement for the intended environment.
Selection Notes
Select this component when a parallel interface RTC is required with onboard NVSRAM. Compare the 100µA @ 3V current consumption against lower-power serial alternatives if battery life is critical. Verify that the 2.7V minimum supply voltage aligns with the system power rails. Check for pin compatibility with existing 24-SSOP footprints.
Part Context
This part belongs to the BQ3285 family of real-time clocks. Similar components include the BQ3285ESS from Texas Instruments, which shares the same core functionality and package but may differ in electrical specifications or manufacturing origin. The BQ3285LDSS specifically denotes the Benchmarq variant with the LD suffix indicating specific material or processing attributes.
Replacement Considerations
The BQ3285EDSS is listed as a similar component with identical descriptions and packaging. Verify electrical parameter equivalence before substitution. No other direct public substitutes are confirmed in the provided data.
