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MM74C922WM

Name: MM74C922WM
Rating: 4.7 (12 reviews)

IC ENCODER 16-KEY 1 X 8:4 20SOIC

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Mfr。パート #MM74C922WM
パッケージ SOIC-20
データシート
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仕様

Package	Tube
Series	74C
ProductStatus	Obsolete
Type	16-Key Encoder
Circuit	1 x 8:4
IndependentCircuits	1
Current-OutputHighLow	15mA, 16mA
VoltageSupplySource	Single Supply
Voltage-Supply	3V ~ 15V
OperatingTemperature	-40°C ~ 85°C
MountingType	Surface Mount
Package/Case	20-SOIC (0.295, 7.50mm Width)

概要

Description

The MM74C922WM is a BCD (Binary Coded Decimal) to seven-segment decoder/driver integrated circuit. It is designed to convert binary inputs into a format suitable for driving a seven-segment display, commonly used in digital clocks, counters, and various other display applications.
This IC takes a 4-bit BCD input and activates the corresponding segments of a seven-segment display to represent decimal digits (0-9). It features an active low output, meaning that the output segments are turned on when activated by the input.
The MM74C922WM is notable for its high-speed performance, low power consumption, and compatibility with other TTL (Transistor-Transistor Logic) devices. It typically operates within a supply voltage range of 3V to 15V, making it versatile for various applications.
In summary, the MM74C922WM is a critical component for projects requiring numeric display capabilities, offering straightforward integration and reliable performance in digital display systems.

Features

The MM74C922WM is a dual BCD (Binary-Coded Decimal) to 7-segment decoder/driver designed for use in digital displays. Key features include:
1. Dual Functionality: It can decode two 4-bit BCD inputs to drive two 7-segment displays.
2. Output Control: It provides active low outputs for each segment (a to g) that directly drive LED displays.
3. Logic Compatibility: Compatible with CMOS and TTL logic levels, allowing for integration with various digital circuits.
4. Display Blanking: Features a display blanking function for turning off the display when desired.
5. Decimal Point Control: Includes a decimal point output for enhanced display capabilities.
6. Low Power Consumption: Designed for low power usage, making it suitable for battery-operated devices.
7. Temperature Range: Operates over a wide temperature range, ensuring reliability in diverse environments.
These features make the MM74C922WM ideal for applications in calculators, digital meters, and other electronic displays.

Package

The MM74C922WM is typically packaged in a 16-lead dual in-line package (DIP) format. It may also be available in surface mount options, such as the SOIC.

Pinout

The MM74C922WM is a dual BCD (Binary-Coded Decimal) counter and decoder. It comes in a 16-pin DIP package. The pinout and their functions are as follows:
1. V_CC (Pin 1): Positive supply voltage.
2. A1 (Pin 2): Input for the least significant bit (LSB) of the BCD.
3. A2 (Pin 3): Input for the second least significant bit.
4. A3 (Pin 4): Input for the third least significant bit.
5. A4 (Pin 5): Input for the most significant bit (MSB).
6. GND (Pin 6): Ground connection.
7. B0 (Pin 7): Output representing BCD digit 0.
8. B1 (Pin 8): Output representing BCD digit 1.
9. B2 (Pin 9): Output representing BCD digit 2.
10. B3 (Pin 10): Output representing BCD digit 3.
11. C1 (Pin 11): Control input.
12. C2 (Pin 12): Control input.
13. RCO (Pin 13): Ripple carry output.
14. LOAD (Pin 14): Load control input.
15. CLR (Pin 15): Reset input.
16. V_CC (Pin 16): Positive supply voltage (duplicate pin).
This device is commonly used in digital counting applications.

Manufacturer

The MM74C922WM is manufactured by Texas Instruments (TI), a multinational electronics company. Texas Instruments specializes in the design and production of semiconductors and various integrated circuits, including analog and digital signal processing chips. Founded in 1930, the company is known for its innovation in the semiconductor industry and its contributions to electronic components used in a wide range of applications, such as computers, communication equipment, automotive systems, and consumer electronics. TI is a key player in providing solutions for both industrial and consumer markets, offering products that enhance performance and efficiency in electronic devices.

Application

The MM74C922WM is a BCD (Binary-Coded Decimal) up/down counter primarily used in digital applications such as frequency counters, digital clocks, and event counters. It can interface with displays, enabling numeric output for various electronic devices. Its capability to count in both ascending and descending order makes it suitable for applications in industrial automation, robotics, and consumer electronics where precise counting is required.

Equivalent

The MM74C922WM is a dual BCD up/down counter. Equivalent products include the MC14519, 74HC922, and CD4026. These chips serve similar functions in counting applications, but ensure to check specific pin configurations and characteristics for compatibility in your design.