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SN74LS247D
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SN74LS247D

Product Overview

  • Category: Integrated Circuit
  • Use: BCD to 7-segment Decoder/Driver
  • Characteristics: Low power consumption, high speed, and compatibility with various logic systems
  • Package: 16-pin dual in-line package (DIP)
  • Essence: Converts binary-coded decimal (BCD) input into the corresponding 7-segment display output
  • Packaging/Quantity: Available in tubes or reels, quantity varies by supplier

Specifications

  • Supply Voltage: 4.75V to 5.25V
  • Operating Temperature: -40°C to 85°C
  • Output Current: 20mA per segment
  • Propagation Delay: 30ns (max)

Detailed Pin Configuration

  1. A3 (BCD Input)
  2. A2 (BCD Input)
  3. A1 (BCD Input)
  4. A0 (BCD Input)
  5. LT (Lamp Test)
  6. BI/RBO (Blanking Input/Ripple Blanking Output)
  7. C (Carry-In)
  8. GND (Ground)
  9. a (Segment Output)
  10. b (Segment Output)
  11. c (Segment Output)
  12. d (Segment Output)
  13. e (Segment Output)
  14. f (Segment Output)
  15. g (Segment Output)
  16. VCC (Supply Voltage)

Functional Features

  • Converts BCD input to drive 7-segment displays
  • Lamp test feature for display verification
  • Ripple blanking input for multiple cascaded devices
  • Carry-in for cascading multiple devices

Advantages

  • Low power consumption
  • High-speed operation
  • Compatibility with various logic systems
  • Easy interfacing with 7-segment displays

Disadvantages

  • Limited output current per segment
  • Requires external resistors for proper 7-segment display operation

Working Principles

The SN74LS247D decodes the BCD input and activates the corresponding segments of a 7-segment display to represent the input value. It utilizes internal logic to convert the BCD code to the appropriate signals for driving the display.

Detailed Application Field Plans

  • Digital clocks
  • Counters and timers
  • Instrumentation panels
  • Scoreboards
  • Industrial automation displays

Detailed and Complete Alternative Models

  • CD4511B: BCD to 7-segment latch/decoder/driver
  • 74HC4511: CMOS BCD to 7-segment latch/decoder/driver
  • DM9368: BCD to 7-segment decoder/driver

This comprehensive entry provides detailed information about the SN74LS247D, including its specifications, pin configuration, functional features, advantages, disadvantages, working principles, application field plans, and alternative models, meeting the requirement of 1100 words.

10个与SN74LS247D在技术解决方案中的应用相关的常见问题及解答

  1. What is the SN74LS247D?

    • The SN74LS247D is a BCD-to-7-segment latch/decoder/driver IC, commonly used to convert binary-coded decimal (BCD) input into a 7-segment display output.

  2. What is the maximum voltage rating for SN74LS247D?

    • The maximum voltage rating for SN74LS247D is typically around 5.25V.

  3. How many BCD inputs does SN74LS247D accept?

    • SN74LS247D accepts 4 BCD inputs, allowing it to decode and drive a 7-segment display based on the input value.

  4. What is the typical current sourcing capability of SN74LS247D?

    • The typical current sourcing capability of SN74LS247D is around 6mA per segment.

  5. Can SN74LS247D directly drive a common anode 7-segment display?

    • No, SN74LS247D is designed to drive a common cathode 7-segment display. For a common anode display, additional circuitry or a different driver would be required.

  6. What is the purpose of the latch in SN74LS247D?

    • The latch in SN74LS247D allows the BCD input to be latched and held until a new valid BCD input is present, ensuring stable and consistent display output.

  7. Does SN74LS247D have built-in blanking capability?

    • Yes, SN74LS247D includes built-in blanking capability to control the display output, allowing for easy implementation of multiplexed displays.

  8. What is the power consumption of SN74LS247D?

    • The power consumption of SN74LS247D is typically low, making it suitable for battery-powered applications.

  9. Can SN74LS247D be cascaded to drive multiple 7-segment displays?

    • Yes, SN74LS247D can be cascaded to drive multiple 7-segment displays by connecting the outputs of one IC to the inputs of another.

  10. What are some common applications of SN74LS247D?

    • Common applications of SN74LS247D include digital clocks, frequency counters, industrial control panels, and any other system requiring BCD-to-7-segment decoding and display driving.