Texas Instruments
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SN74LS47NG4
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SN74LS47NG4

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: BCD to 7-segment Decoder/Driver
  • Characteristics:
    • Converts Binary-Coded Decimal (BCD) input into a 7-segment display output
    • Drives common-cathode type 7-segment displays
    • Low power consumption
    • Wide operating voltage range
  • Package: DIP (Dual In-line Package)
  • Essence: Decoding and driving BCD inputs to display on 7-segment displays
  • Packaging/Quantity: Typically sold in reels or tubes containing multiple units

Specifications

  • Supply Voltage Range: 4.75V to 5.25V
  • Input Voltage Range: 0V to VCC
  • Output Voltage Range: 0V to VCC
  • Operating Temperature Range: -40°C to +85°C
  • Maximum Power Dissipation: 500mW
  • Maximum Input Current: ±1mA
  • Maximum Output Current: ±20mA

Detailed Pin Configuration

The SN74LS47NG4 has a total of 16 pins, numbered as follows:

  1. A
  2. B
  3. C
  4. D
  5. LT (Lamp Test)
  6. BI/RBO (Blanking Input / Ripple Blanking Output)
  7. a (Segment a)
  8. b (Segment b)
  9. c (Segment c)
  10. d (Segment d)
  11. e (Segment e)
  12. f (Segment f)
  13. g (Segment g)
  14. VCC (Supply Voltage)
  15. GND (Ground)
  16. RBO (Ripple Blanking Output)

Functional Features

The SN74LS47NG4 is designed to decode and drive BCD inputs to a 7-segment display. It accepts a 4-bit BCD input (A, B, C, D) and generates the necessary outputs to drive a common-cathode type 7-segment display. The LT pin allows for lamp testing, while the BI/RBO pin provides blanking control. The RBO pin can be used for cascading multiple SN74LS47NG4 devices.

Advantages and Disadvantages

Advantages: - Efficient conversion of BCD inputs to 7-segment display outputs - Low power consumption - Wide operating voltage range allows for flexibility in various applications

Disadvantages: - Limited to driving common-cathode type 7-segment displays - Requires additional components for multiplexing or driving multiple displays

Working Principles

The SN74LS47NG4 works by decoding the BCD input and activating the appropriate segments of the 7-segment display to represent the corresponding decimal digit. Each segment is driven by an output pin (a to g), which is controlled based on the input BCD code. The LT pin allows for testing the display, while the BI/RBO pin provides blanking control. The RBO pin can be used for cascading multiple devices to drive multiple displays.

Detailed Application Field Plans

The SN74LS47NG4 is commonly used in various applications where BCD to 7-segment decoding and driving is required. Some specific application fields include:

  1. Digital clocks and timers
  2. Counters and frequency meters
  3. Industrial control panels
  4. Instrumentation displays
  5. Process control systems

Detailed and Complete Alternative Models

Some alternative models that provide similar functionality to the SN74LS47NG4 are:

  1. CD4511: BCD to 7-segment latch/decoder/driver IC
  2. MC14543: BCD to 7-segment decoder/driver IC
  3. HEF4543: BCD to 7-segment latch/decoder/driver IC

These alternative models offer similar features and can be used as replacements for the SN74LS47NG4 in various applications.

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Noem 10 veelgestelde vragen en antwoorden met betrekking tot de toepassing van SN74LS47NG4 in technische oplossingen

Sure! Here are 10 common questions and answers related to the application of SN74LS47NG4 in technical solutions:

  1. Q: What is SN74LS47NG4? A: SN74LS47NG4 is a BCD-to-7-segment decoder/driver IC, commonly used to convert binary-coded decimal (BCD) inputs into a 7-segment display output.

  2. Q: How does SN74LS47NG4 work? A: SN74LS47NG4 takes a 4-bit BCD input and decodes it to drive the appropriate segments of a 7-segment display, enabling the display of numbers from 0 to 9.

  3. Q: What is the maximum frequency at which SN74LS47NG4 can operate? A: SN74LS47NG4 can operate at a maximum clock frequency of 24 MHz.

  4. Q: Can SN74LS47NG4 drive common cathode or common anode displays? A: SN74LS47NG4 is designed to drive common anode displays. For common cathode displays, an additional inverter circuit is required.

  5. Q: What is the maximum current that SN74LS47NG4 can sink/source per segment? A: SN74LS47NG4 can sink/source up to 24 mA per segment.

  6. Q: Can SN74LS47NG4 be cascaded to drive multiple 7-segment displays? A: Yes, SN74LS47NG4 can be cascaded to drive multiple displays by connecting the outputs of one IC to the inputs of another.

  7. Q: Does SN74LS47NG4 have built-in multiplexing capability? A: No, SN74LS47NG4 does not have built-in multiplexing capability. Multiplexing can be achieved by using external circuitry.

  8. Q: What is the power supply voltage range for SN74LS47NG4? A: SN74LS47NG4 operates with a power supply voltage range of 4.75V to 5.25V.

  9. Q: Can SN74LS47NG4 be used in both digital and analog applications? A: SN74LS47NG4 is primarily designed for digital applications, specifically for driving 7-segment displays.

  10. Q: Are there any alternative ICs to SN74LS47NG4 for BCD-to-7-segment decoding? A: Yes, there are alternative ICs available such as CD4511, CD4026, or MAX7219 that can perform similar BCD-to-7-segment decoding functions.

I hope these questions and answers provide you with useful information about the application of SN74LS47NG4 in technical solutions!