CD4028BMT

Product Overview

Category

CD4028BMT belongs to the category of integrated circuits (ICs).

Use

The CD4028BMT is a BCD-to-decimal decoder IC. It is primarily used in digital electronics for converting binary-coded decimal (BCD) inputs into corresponding decimal outputs.

Characteristics

• Package: CD4028BMT is available in a standard 16-pin SOIC (Small Outline Integrated Circuit) package.
• Essence: The essence of CD4028BMT lies in its ability to decode BCD inputs and provide decimal outputs.
• Packaging/Quantity: CD4028BMT is typically sold in reels or tubes, with quantities varying depending on the supplier.

Specifications

The specifications of CD4028BMT are as follows:

• Supply Voltage Range: 3V to 18V
• Input Voltage Range: 0V to VDD
• Output Voltage Range: 0V to VDD
• Maximum Operating Frequency: 6 MHz
• Maximum Propagation Delay: 120 ns
• Maximum Power Dissipation: 500 mW

Detailed Pin Configuration

The CD4028BMT has a total of 16 pins, each serving a specific purpose. The pin configuration is as follows:

1. A0 - BCD Input A0
2. A1 - BCD Input A1
3. A2 - BCD Input A2
4. A3 - BCD Input A3
5. LT - Lamp Test Input
6. BI/RBO - Blanking Input/ Ripple Blanking Output
7. CCO - Carry-Out Output
8. GND - Ground
9. F - Decimal Output F
10. E - Decimal Output E
11. D - Decimal Output D
12. C - Decimal Output C
13. B - Decimal Output B
14. A - Decimal Output A
15. VDD - Supply Voltage
16. RBO - Ripple Blanking Output

Functional Features

The CD4028BMT offers the following functional features:

• BCD-to-decimal decoding: It can convert BCD inputs into corresponding decimal outputs.
• Lamp Test Input: The LT pin allows for testing the display lamps without affecting the normal operation of the decoder.
• Blanking Input/Output: The BI/RBO pin provides blanking control, allowing the user to disable or enable the output display.
• Carry-Out Output: The CCO pin indicates when a carry-out condition is present during cascading operations.

Advantages and Disadvantages

Advantages

• Compact size and easy integration due to its integrated circuit design.
• Low power consumption, making it suitable for battery-powered devices.
• High-speed operation with a maximum frequency of 6 MHz.
• Versatile application in various digital systems requiring BCD-to-decimal decoding.

Disadvantages

• Limited number of input pins restricts the range of BCD inputs that can be decoded.
• Propagation delay of up to 120 ns may introduce timing issues in certain applications.

Working Principles

The CD4028BMT works by accepting BCD inputs (A0-A3) and converting them into corresponding decimal outputs (A-F). The lamp test input (LT) allows for testing the display lamps, while the blanking input/output (BI/RBO) enables the user to control the output display. The carry-out output (CCO) indicates the presence of a carry-out condition during cascading operations.

Detailed Application Field Plans

The CD4028BMT finds applications in various fields, including but not limited to:

1. Digital clocks and timers
2. Counters and frequency dividers
3. Data encoding and decoding systems
4. Seven-segment display drivers
5. Industrial control systems

Detailed and Complete Alternative Models

Some alternative models to CD4028BMT that offer similar functionality include:

1. CD74HC4511E
2. SN74LS47N
3. MC14543BCP
4. HEF4543BP
5. MM74C48N

These alternatives can be considered based on specific requirements, availability, and compatibility with the existing system.

In conclusion, the CD4028BMT is a BCD-to-decimal decoder IC used in digital electronics. It offers compact size, low power consumption, and high-speed operation. While it has limitations in terms of input pins and propagation delay, it finds applications in various fields such as digital clocks, counters, and industrial control systems. Alternative models like CD74HC4511E and SN74LS47N can also be considered for similar functionality.