SN74LS247DE4

Product Overview

• Category: Integrated Circuit (IC)
• Use: BCD-to-Seven-Segment Decoder/Driver
• Characteristics:
  • Converts Binary-Coded Decimal (BCD) input to a 7-segment display output
  • Drives common-anode LED or incandescent displays directly
  • Low power consumption
  • Wide operating voltage range
• Package: DIP-16 (Dual In-Line Package with 16 pins)
• Essence: Decodes BCD input and drives 7-segment displays
• Packaging/Quantity: Available in reels of 2500 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 Clock Frequency: 24 MHz
• Maximum Propagation Delay: 30 ns

Detailed Pin Configuration

1. A3 (BCD Input)
2. A2 (BCD Input)
3. A1 (BCD Input)
4. A0 (BCD Input)
5. LT (Lamp Test Input)
6. BI/RBO (Blanking Input/ Ripple Blanking Output)
7. GND (Ground)
8. F (Output for Segment F)
9. E (Output for Segment E)
10. D (Output for Segment D)
11. C (Output for Segment C)
12. B (Output for Segment B)
13. A (Output for Segment A)
14. RBO (Ripple Blanking Output)
15. VCC (Supply Voltage)
16. LE (Latch Enable Input)

Functional Features

• Converts BCD input to the corresponding 7-segment display output
• Supports lamp test and blanking functions
• Ripple blanking output for cascading multiple devices
• Latch enable input for synchronizing data transfer

Advantages

• Low power consumption makes it suitable for battery-powered applications
• Wide operating voltage range allows compatibility with various systems
• Directly drives common-anode LED or incandescent displays, simplifying circuit design

Disadvantages

• Limited to BCD input, not suitable for other numeric formats
• Requires additional components for driving common-cathode displays

Working Principles

The SN74LS247DE4 is a BCD-to-Seven-Segment Decoder/Driver IC. It takes a 4-bit Binary-Coded Decimal (BCD) input and decodes it to drive a 7-segment display. The inputs A3, A2, A1, and A0 represent the BCD digits, while the outputs F, E, D, C, B, and A correspond to the segments of the 7-segment display.

When the latch enable (LE) input is high, the BCD input is latched and decoded. The decoded output is then displayed on the 7-segment display. The lamp test (LT) input can be used to test all segments, and the blanking input (BI) can be used to blank the display.

Detailed Application Field Plans

The SN74LS247DE4 is commonly used in applications where BCD input needs to be displayed on a 7-segment display. Some typical 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

1. CD4511B: BCD-to-Seven-Segment Latch/Decoder/Driver
2. MC14543B: BCD-to-Seven-Segment Decoder/Driver with Latch
3. 74HC4511: BCD-to-Seven-Segment Latch/Decoder/Driver

These alternative models provide similar functionality to the SN74LS247DE4 and can be used as replacements in various applications.

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