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Product Detailed Parameters
- Description：IC BCD-7 SEG DECODER/DRVR 16SO
- Series：*
- Mfr：Texas Instruments
- Package：Bulk
- Display Type：-
- Configuration：-
- Interface：-
- Digits or Characters：-
- Voltage - Supply：-
- Operating Temperature：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
- Current - Supply：-
- Grade：-
- Qualification：-
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Overview
The SN74LS47NS is a BCD-to-seven-segment decoder and driver belonging to the Texas Instruments LS series. It features inverted outputs with open-collector configurations, designed for direct interface with common-cathode displays. The device operates within a standard TTL voltage range of 4.75 V to 5.25 V and supports a commercial temperature range from 0 °C to 70 °C. It is housed in a 16-pin plastic dual in-line package (PDIP-16).
Feature Summary
- Provides decoding of Binary-Coded Decimal inputs into seven-segment display signals.
- Features open-collector outputs suitable for driving high-current loads.
- Includes active-low ripple blanking input for display control functions.
Applications
- Driving common-cathode seven-segment LED numeric displays.
- BCD to decimal conversion in digital counting systems.
- Numeric readout interfaces in test and measurement equipment.
Procurement Notes
Verify component authenticity through authorized channels as the part is marked non-RoHS compliant. Confirm the specific manufacturer origin, such as Motorola or Texas Instruments, as both produced this variant. Ensure the PDIP-16 package matches the target PCB footprint requirements before procurement.
Selection Notes
Select this component when interfacing with common-cathode displays requiring active-low logic levels. The open-collector output structure allows for flexible current sourcing via external pull-up resistors. Consider the LS series propagation delay characteristics for timing-sensitive applications.
Part Context
This part belongs to the standard 74LS logic family, widely used in legacy digital designs. It serves as a functional equivalent to other BCD decoders like the SN74LS48, though output polarity differs. The SN74LS47NS represents a specific packaging variant of the broader SN74LS47 logical function.
Replacement Considerations
SN74LS48 provides similar functionality but features non-inverted outputs for common-anode displays. SN74HC47 offers CMOS compatibility with higher input impedance while maintaining the same pinout and inverted output logic.
