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CD74HC4511E
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CD74HC4511E

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: BCD to 7-segment latch/decoder/driver
  • Characteristics: High-speed CMOS logic, low power consumption
  • Package: 16-pin DIP (Dual In-line Package)
  • Essence: Converts binary-coded decimal (BCD) input into a 7-segment display output
  • Packaging/Quantity: Available in reels of 2500 units or tubes of 25 units

Specifications

  • Supply Voltage: 2V to 6V
  • Input Voltage: 0V to VCC
  • Output Voltage: 0V to VCC
  • Operating Temperature: -55°C to +125°C
  • Propagation Delay Time: 20ns (typical)
  • Output Current: ±25mA

Detailed Pin Configuration

The CD74HC4511E has a total of 16 pins. The pin configuration is as follows:

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

Functional Features

  • Converts BCD input into a 7-segment display output
  • Latch enable input for storing the BCD input
  • Lamp test and blanking inputs for testing and blanking the display
  • Ripple blanking output for cascading multiple CD74HC4511E devices

Advantages and Disadvantages

Advantages

  • High-speed operation due to CMOS technology
  • Low power consumption
  • Easy integration with other ICs
  • Compact 16-pin DIP package

Disadvantages

  • Limited to BCD input, not suitable for other numeric systems
  • Requires external components for driving the 7-segment display

Working Principles

The CD74HC4511E is designed to convert BCD input into a 7-segment display output. The BCD inputs (A, B, C, D) represent the decimal digits 0 to 9. When a BCD input is applied, the corresponding segment outputs (a to g) are activated to display the corresponding digit on a 7-segment display.

The latch enable (LE) input allows the BCD input to be stored in the internal latch, ensuring stable output even when the BCD inputs change. The lamp test (LT) input activates all segments for testing purposes, while the blanking input (BI) blanks the display by turning off all segments.

Detailed Application Field Plans

The CD74HC4511E is commonly used in various applications that require BCD to 7-segment decoding and driving. Some of the typical application fields include:

  1. Digital clocks and timers
  2. Counters and frequency meters
  3. Scoreboards and displays in sports events
  4. Industrial control panels
  5. Electronic voting machines

Detailed and Complete Alternative Models

There are several alternative models available that offer similar functionality to the CD74HC4511E. Some popular alternatives include:

  1. CD4511BE: Similar BCD to 7-segment latch/decoder/driver IC in a 16-pin DIP package.
  2. SN74LS47N: BCD to 7-segment decoder/driver IC with open collector outputs.
  3. CD4511BCN: BCD to 7-segment latch/decoder/driver IC in a 16-pin DIP package.

These alternative models can be considered based on specific requirements and availability.

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Liệt kê 10 câu hỏi và câu trả lời thường gặp liên quan đến ứng dụng CD74HC4511E trong giải pháp kỹ thuật

Sure! Here are 10 common questions and answers related to the application of CD74HC4511E in technical solutions:

Q1: What is CD74HC4511E? A1: CD74HC4511E is a BCD-to-7-segment latch/decoder/driver IC, commonly used to convert binary-coded decimal (BCD) inputs into a 7-segment display output.

Q2: How many BCD inputs does CD74HC4511E have? A2: CD74HC4511E has four BCD inputs (A, B, C, and D) which can accept binary values from 0 to 9.

Q3: How many 7-segment display outputs can CD74HC4511E drive? A3: CD74HC4511E can drive one 7-segment display output.

Q4: Can CD74HC4511E directly drive a common cathode 7-segment display? A4: No, CD74HC4511E is designed to drive a common anode 7-segment display. For a common cathode display, additional circuitry is required.

Q5: What is the maximum frequency at which CD74HC4511E can operate? A5: CD74HC4511E can operate at a maximum clock frequency of 25 MHz.

Q6: How does CD74HC4511E handle invalid BCD inputs? A6: CD74HC4511E treats any invalid BCD input (values above 9) as "don't care" and does not produce any specific output on the 7-segment display.

Q7: Can CD74HC4511E be cascaded to drive multiple 7-segment displays? A7: Yes, CD74HC4511E can be cascaded to drive multiple 7-segment displays by connecting the outputs of one CD74HC4511E to the inputs of another.

Q8: What is the power supply voltage range for CD74HC4511E? A8: CD74HC4511E operates with a power supply voltage range of 2V to 6V.

Q9: Does CD74HC4511E have built-in current limiting resistors for the 7-segment display? A9: No, CD74HC4511E does not have built-in current limiting resistors. External resistors are required to limit the current flowing through the 7-segment display.

Q10: Can CD74HC4511E be used in multiplexed display applications? A10: Yes, CD74HC4511E can be used in multiplexed display applications by using additional circuitry to control the common anode of each 7-segment display.

Please note that these answers provide a general overview and it's always recommended to refer to the datasheet and application notes for detailed information and specific design considerations.