Texas Instruments
Imej mungkin representasi.
Lihat spesifikasi untuk butiran produk.
SN74LS247NG4
Lihat Butiran Helaian data

SN74LS247NG4

Product Overview

Category

SN74LS247NG4 belongs to the category of integrated circuits (ICs).

Use

This product is commonly used in digital display applications, specifically for driving 7-segment LED displays.

Characteristics

  • Low power consumption
  • High-speed operation
  • Wide operating voltage range
  • BCD-to-Seven-Segment decoder/driver functionality

Package

SN74LS247NG4 is available in a DIP (Dual In-line Package) format.

Essence

The essence of SN74LS247NG4 lies in its ability to convert Binary Coded Decimal (BCD) inputs into signals that can drive a 7-segment LED display.

Packaging/Quantity

SN74LS247NG4 is typically packaged in tubes or reels, with quantities varying depending on the supplier.

Specifications

  • Supply Voltage: 4.75V to 5.25V
  • Input Voltage: 0V to Vcc
  • Output Voltage: 0V to Vcc
  • Operating Temperature Range: -40°C to +85°C
  • Maximum Clock Frequency: 30 MHz
  • Maximum Propagation Delay: 45 ns

Detailed Pin Configuration

  1. A
  2. B
  3. C
  4. D
  5. LT
  6. BI/RBO
  7. GND
  8. F
  9. E
  10. CARRY OUT
  11. LT
  12. RBO
  13. a
  14. b
  15. c
  16. d
  17. e
  18. f
  19. g
  20. Vcc

Functional Features

SN74LS247NG4 offers the following functional features:

  • BCD-to-Seven-Segment decoding
  • Active-low outputs for driving common-anode 7-segment displays
  • Cascadable for larger display applications
  • Internal carry-out signal for cascading multiple devices

Advantages and Disadvantages

Advantages

  • Low power consumption makes it suitable for battery-powered applications
  • High-speed operation enables real-time display updates
  • Wide operating voltage range allows compatibility with various systems
  • Cascadable design simplifies multi-digit display implementations

Disadvantages

  • Limited to driving common-anode 7-segment displays
  • Requires additional components for driving common-cathode displays

Working Principles

SN74LS247NG4 operates by receiving a BCD input (A, B, C, D) and converting it into the corresponding signals required to drive a 7-segment LED display. The internal decoding logic maps each BCD input combination to the appropriate segment outputs (a, b, c, d, e, f, g). The active-low outputs are then used to control the individual segments of the display.

Detailed Application Field Plans

SN74LS247NG4 finds applications in various fields, including:

  1. Digital clocks
  2. Counters and timers
  3. Instrumentation panels
  4. Scoreboards
  5. Industrial control systems

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to SN74LS247NG4 include:

  1. CD4511BC - BCD-to-Seven-Segment Latch/Decoder/Driver
  2. MM74C48 - BCD-to-Seven-Segment Decoder/Driver
  3. DM9368 - BCD-to-Seven-Segment Decoder/Driver

These alternatives can be considered based on specific requirements and availability.

Word count: 343 words

Senaraikan 10 soalan dan jawapan biasa yang berkaitan dengan aplikasi SN74LS247NG4 dalam penyelesaian teknikal

Sure! Here are 10 common questions and answers related to the application of SN74LS247NG4:

  1. Q: What is SN74LS247NG4? A: SN74LS247NG4 is a BCD-to-Seven-Segment Decoder/Driver IC, commonly used in digital display applications.

  2. Q: What is the maximum voltage rating for SN74LS247NG4? A: The maximum voltage rating for SN74LS247NG4 is typically 5.25V.

  3. Q: How many inputs does SN74LS247NG4 have? A: SN74LS247NG4 has four BCD (Binary-Coded Decimal) inputs, labeled A, B, C, and D.

  4. Q: How many outputs does SN74LS247NG4 have? A: SN74LS247NG4 has seven segment outputs, labeled a, b, c, d, e, f, and g, corresponding to the segments of a seven-segment display.

  5. Q: Can SN74LS247NG4 directly drive a seven-segment display? A: No, SN74LS247NG4 requires external current-limiting resistors to drive a seven-segment display.

  6. Q: What is the purpose of the LT pin in SN74LS247NG4? A: The LT (Lamp Test) pin is used to test the functionality of the seven-segment display by lighting up all segments simultaneously.

  7. Q: How does SN74LS247NG4 handle invalid BCD inputs? A: SN74LS247NG4 has an internal decoding logic that treats any invalid BCD input as a blank display output.

  8. Q: Can SN74LS247NG4 be cascaded to drive multiple seven-segment displays? A: Yes, SN74LS247NG4 can be cascaded to drive multiple seven-segment displays by connecting the outputs of one IC to the inputs of another.

  9. Q: What is the maximum frequency at which SN74LS247NG4 can operate? A: The maximum operating frequency for SN74LS247NG4 is typically around 25 MHz.

  10. Q: Can SN74LS247NG4 be used in both common anode and common cathode configurations? A: Yes, SN74LS247NG4 can be used in both common anode and common cathode configurations by appropriately connecting the segment outputs and power supply.