MM74C923WM

Name: MM74C923WM
Brand: Onsemi
Rating: 4.5 (10 reviews)
Author: Lisleapex

Versatile and reliable -pin SOIC W rail encoder with excellent performanc

5,389 Effective Inventory

MM74C923WM

Effective Inventory5,389

Versatile and reliable -pin SOIC W rail encoder with excellent performanc

Manufacturer Part # : MM74C923WM
Package/Case: SOIC-20
Part Status : OBSOLETE
Brand: Onsemi
Product Categories : Signal Switches, Multiplexers, Decoders
Series : 74C923

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MM74C923WM DataSheet

Current price plan is under preparation. Please contact our customer service team for the latest pricing information. Thank you for your understanding and support!

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MM74C923WM Details

The MM74C923WM is a 20-key encoder from Fairchild Semiconductor, designed for encoding input from tactile switches or keypads into a binary format. This encoder offers a simple and efficient solution for various input applications, featuring low power consumption and reliable performance. It is housed in a small and versatile package, making it suitable for space-constrained designs.

Pinout

1 (VDD): Positive Power Supply
2 (GND): Ground
3 (OUT0): Binary Output 0
4 (OUT1): Binary Output 1
5 (OUT2): Binary Output 2
6 (OUT3): Binary Output 3
7-12 (I0-I5): Keypad Inputs
13-16 (Y0-Y3): Binary Outputs
17 (STROBE): Strobe Input
18 (ENCODING): Encoding Input
19 (DISPLAY): Display Enable Output
20 (EXIT): Exit Output

(Tip: For detailed pinout information, please refer to the corresponding datasheet.)

Key Features

Simple Input Encoding: Converts input from tactile switches or keypads into a binary format.
Low Power Consumption: Designed for low power operation, making it suitable for battery-powered applications.
Compact Package: Housed in a small and versatile package for easy integration.
Multiple Binary Outputs: Provides multiple binary outputs for flexible data processing.
Strobe Input: Supports strobe input for efficient signal synchronization.

Application

Input Encoding: Ideal for encoding input from tactile switches or keypads in various electronic systems.
Keypad Control: Used in keypad-based control panels for data input and processing.
Interface Design: Suitable for interface designs requiring efficient input encoding and processing.

Where to Use

The MM74C923WM is suitable for applications that require efficient input encoding and processing, especially in electronic systems utilizing tactile switches or keypads. It is commonly used in control panels, interface designs, and data input systems for reliable performance and ease of use.

How to Use

Connect the MM74C923WM to your circuit by wiring the VDD and GND pins to the appropriate power supply and ground connections. The keypad inputs (I0-I5) should be connected to your tactile switches or keypad. The binary outputs can be used for further data processing or display purposes. The strobe and encoding inputs provide synchronization and control, while the display enable and exit outputs offer additional functionality. For detailed usage instructions, refer to the datasheet.

Application Circuit

The application circuit diagram for the MM74C923WM shows how to connect the encoder to your electronic system. It includes connections for power supply, ground, keypad inputs, binary outputs, and control inputs, ensuring proper operation and efficient input encoding.

(Tip: For detailed circuit diagram connections and usage guide, refer to the datasheet.)

Equivalents

CD4028B: A similar encoder from Texas Instruments offering comparable features and performance.
MM74C922: An alternative keypad encoder from Fairchild Semiconductor with similar functionality and specifications.

Complementary

The MM74C923WM can be complemented by the MM74C922, which offers a lower number of keypad inputs while maintaining similar encoding and functionality. Additionally, complementary components such as display drivers and microcontrollers can enhance the overall system design and functionality.

When selecting complementary components, ensure their compatibility and integration with the MM74C923WM for optimal performance.

Frequently Asked Questions

Q: How many keypad inputs does the MM74C923WM support?

A: The MM74C923WM supports 6 keypad inputs, labeled I0-I5. For more details, refer to the datasheet for specific input limitations and conditions.

Q: Can the MM74C923WM be used in battery-powered applications?

A: Yes, the MM74C923WM is designed for low power consumption, making it suitable for battery-powered applications. Ensure that the power supply and current requirements are within the specified limits for reliable operation.

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	SMD/SMT	Package / Case	SOIC-20
Brand	onsemi / Fairchild	Function	Encoder
Height	2.35 mm	Input Voltage	- 300 mV to 300 mV
Length	13 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	36	Subcategory	Logic ICs
Width	7.6 mm	Part # Aliases	MM74C923WM_NL
Unit Weight	0.028254 oz

Datasheet PDF

Datasheets record the features, absolute maximum ratings, applications and more of the device, which benefit a lot as an overall guide to the specific application of the part.

Preliminary Specification MM74C923WM PDF Download

FAQs

What is MM74C923WM?

The MM74C923WM is a 20-key encoder integrated circuit designed by Fairchild Semiconductor. It is commonly used in electronic input devices such as keypads, keyboards, and remote controls to encode multiple key inputs into a binary or BCD (Binary-Coded Decimal) output.

How Does MM74C923WM Work?

The MM74C923WM works by scanning the status of multiple key inputs and encoding the active key into a binary or BCD format. It features a priority encoding scheme that allows for quick detection of key presses. The encoder typically interfaces with a microcontroller or decoder to process the encoded key data.

How Many Pins does MM74C923WM have and What are the Functions of the Pinout Configuration?

The MM74C923WM is housed in a 20-pin SOIC (Small Outline Integrated Circuit) package. The pinout configuration includes:

VCC: Power supply pin.
GND: Ground pin.
KB0-KB4: Key input pins.
VA: Strobe input pin for column scanning.
RS, CS, DS: Register control pins.
OUTA, OUTB, OUTC, OUTD: Binary or BCD output pins.

What are the Pros and Cons of MM74C923WM?

Pros:

Multiple Key Input Handling: Capable of encoding up to 20 key inputs for versatile applications.
Priority Encoding: Provides rapid detection of key presses through a priority scheme.
Simple Interface: Interfaces easily with microcontrollers or decoders for key data processing.
Compact Package: The 20-pin SOIC package offers space-efficient integration into designs.

Cons:

Limited Key Inputs: May not be suitable for applications requiring a large number of key inputs.
Programming Complexity: Requires programming logic to interpret the encoded key data.
External Components: Additional components may be needed for debouncing or filtering key inputs.

Are There Any Equivalents/Alternatives to MM74C923WM for Recommendation?

The CD4028 from Texas Instruments is a similar 20-key encoder IC with different features.
Alternatives to the MM74C923WM include the CD74HC4511 from Texas Instruments and the HEF4028 from Nexperia.