MM74C923WM

Product Overview

Category

MM74C923WM belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used for input device interfacing in various electronic applications.

Characteristics

• Package: MM74C923WM is available in a 20-pin wide SOIC package.
• Essence: It serves as an encoder, converting parallel data from input devices into serial data for further processing.
• Packaging/Quantity: The MM74C923WM is typically sold in reels or tubes, with a quantity of 250 units per reel/tube.

Specifications

The MM74C923WM has the following specifications:

• Supply Voltage: 4.5V to 5.5V
• Input Voltage: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Maximum Clock Frequency: 10MHz
• Number of Inputs: 16
• Number of Outputs: 8

Detailed Pin Configuration

The MM74C923WM has a total of 20 pins, each serving a specific purpose. The pin configuration is as follows:

1. GND: Ground reference voltage.
2. A0-A3: Address inputs for selecting the desired input device.
3. EN: Enable input for activating the encoder.
4. CLK: Clock input for synchronizing the encoding process.
5. D0-D7: Data inputs from the input devices.
6. Q0-Q7: Serial output pins for transmitting encoded data.
7. VCC: Positive supply voltage.

Functional Features

The MM74C923WM offers the following functional features:

• Parallel-to-serial conversion: It converts parallel data from input devices into serial data.
• Address selection: Multiple input devices can be connected, and the desired device can be selected using address inputs.
• Clock synchronization: The encoding process is synchronized with an external clock signal.
• Serial output: Encoded data is transmitted serially through the output pins.

Advantages and Disadvantages

Advantages

• Efficient input device interfacing.
• Compact size and easy integration into electronic systems.
• Low power consumption.
• Wide operating temperature range.

Disadvantages

• Limited number of inputs and outputs.
• Requires an external clock signal for proper operation.

Working Principles

The MM74C923WM operates based on the principle of parallel-to-serial conversion. It receives parallel data from input devices and encodes it into a serial format. The address inputs allow selection of the desired input device, while the clock input synchronizes the encoding process. The encoded data is then transmitted serially through the output pins.

Detailed Application Field Plans

The MM74C923WM finds applications in various fields where input device interfacing is required. Some detailed application field plans include:

1. Computer peripherals: Used in keyboards, mice, and other input devices to convert parallel data into serial data for communication with the computer.
2. Industrial control systems: Enables interfacing with switches, buttons, and sensors in industrial automation applications.
3. Consumer electronics: Integrated into remote controls, game controllers, and other consumer electronic devices for efficient data transmission.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the MM74C923WM are:

1. CD4021B: 8-stage static shift register with parallel-to-serial conversion capability.
2. SN74HC165: 8-bit parallel-in/serial-out shift register with asynchronous reset.
3. HEF4094B: 8-stage shift-and-store bus register with parallel-to-serial conversion.

These alternative models can be considered based on specific requirements and compatibility with the target application.

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