• MM74C923N PDIP-20
MM74C923N PDIP-20

MM74C923N

Combine the flexibility of a -key scanner with the precision of a code wheel in this comprehensive encoding solution

Inventory:8,007

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Overview of MM74C923N

The MM74C923N is a 20-key encoder IC designed for use in keyboard scanning applications.It features a built-in oscillator and a 20-key FIFO (First In, First Out) buffer, providing essential functions for keyboard interfacing.

Pinout

(Note:The pin configuration below is a general representation.Refer to the specific datasheet for precise details.)

  • VDD:Positive Power Supply
  • VSS:Ground
  • VDD:Positive Power Supply
  • CLK:Clock Input
  • DIN:Data Input
  • DOUT:Data Output
  • STB:Strobe Input
  • OE:Output Enable
  • VDD:Positive Power Supply
  • VSS:Ground
  • BCD0-BCD9:Binary-Coded Decimal Output Pins


Circuit Diagram

Include a circuit diagram that illustrates the connections and operation of the MM74C923N IC for a visual representation.

Key Features

  • 20-Key Encoder:The MM74C923N supports up to 20 keys, allowing for a versatile keyboard interface in various applications.
  • Integrated FIFO Buffer:With a built-in FIFO buffer, this IC can temporarily store keycodes for efficient keyboard scanning.
  • On-Chip Oscillator:The MM74C923N features an internal oscillator for generating clock signals, simplifying system design.
  • Low Power Consumption:This IC consumes minimal power, making it suitable for battery-powered devices.
  • BCD Output:Provides Binary-Coded Decimal (BCD) output for easy interfacing with display devices.

Note:For detailed technical specifications, please refer to the MM74C923N datasheet.

Application

  • Keyboard Scanning Systems: Ideal for keyboard scanning applications in electronic devices and appliances.
  • Input Devices: Suitable for use in various input devices requiring key encoding and scanning capabilities.
  • Embedded Systems: The MM74C923N can be integrated into embedded systems for keyboard interfacing and data input.

Functionality

The MM74C923N is a versatile encoder IC designed to handle key encoding and scanning tasks efficiently. It simplifies the implementation of keyboard input systems in electronic devices.

Usage Guide

  • Power Supply: Connect VDD (Pins 1, 3, 9) to the positive power supply and VSS (Pins 2, 10) to ground.
  • Input Connections: Connect the CLK, DIN, STB, and OE pins to the respective control signals for proper operation.
  • Output Handling: Utilize the BCD0-BCD9 pins to read the binary-coded decimal output corresponding to the pressed keys.

Frequently Asked Questions

Q: How many keys can the MM74C923N encoder support?
A: The MM74C923N can support up to 20 keys for encoding and scanning purposes.

Q: Is the MM74C923N suitable for low-power devices?
A: Yes, the MM74C923N features low power consumption, making it ideal for battery-powered applications requiring keyboard interfacing.

Equivalent

For similar functionalities, consider these alternatives to the MM74C923N:

  • 74HC922: This IC offers similar keyboard encoding capabilities with additional features for enhanced performance.
  • CD74HC923: A compatible IC from Texas Instruments providing comparable functionality to the MM74C923N for keyboard scanning applications.

MM74C923N

Specifications

The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

Product Category Encoders, Decoders, Multiplexers & Demultiplexers RoHS Details
Product Decoders, Encoders, Multiplexers & Demultiplexers Logic Family 74C
Number of Bits 4 bit Number of Input Lines 8 Input
Number of Output Lines 5 Output Propagation Delay Time 150 ns at 5 V, 80 ns at 10 V, 60 ns at 15 V
Supply Voltage - Min 3 V Supply Voltage - Max 15 V
Minimum Operating Temperature - 55 C Maximum Operating Temperature + 125 C
Mounting Style Through Hole Package / Case PDIP-20
Brand onsemi / Fairchild Function Encoder
Height 3.43 mm Input Voltage - 300 mV to 300 mV
Length 26.92 mm Logic Type Encoder
Number of Circuits Single Operating Supply Voltage 3 V to 15 V
Output Current 8 mA Output Voltage - 300 mV to 300 mV
Pd - Power Dissipation 700 mW Product Type Encoders, Decoders, Multiplexers & Demultiplexers
Factory Pack Quantity 18 Subcategory Logic ICs
Width 7.11 mm Part # Aliases MM74C923N_NL
Unit Weight 0.079719 oz

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MM74C923N

Combine the flexibility of a -key scanner with the precision of a code wheel in this comprehensive encoding solution

Inventory:

8,007