MM74HC138MTCX

Product Overview

• Category: Integrated Circuit (IC)
• Use: Decoder/Demultiplexer
• Characteristics: High-Speed CMOS Logic, 3-to-8 Line Decoder/Demultiplexer
• Package: TSSOP (Thin Shrink Small Outline Package)
• Essence: The MM74HC138MTCX is a decoder/demultiplexer IC that converts a binary input into a corresponding output line. It is commonly used in digital electronics to select one of multiple output lines based on the input code.
• Packaging/Quantity: The MM74HC138MTCX is available in tape and reel packaging with a quantity of 2500 units per reel.

Specifications

• Supply Voltage: 2V to 6V
• Input Voltage: 0V to VCC
• Output Voltage: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 15 ns (typical)
• Output Current: ±25 mA

Pin Configuration

The MM74HC138MTCX has a total of 16 pins. Here is the detailed pin configuration:

1. GND (Ground)
2. A0 (Address Input 0)
3. A1 (Address Input 1)
4. A2 (Address Input 2)
5. /G1 (Enable Input)
6. Y0 (Output 0)
7. Y1 (Output 1)
8. Y2 (Output 2)
9. Y3 (Output 3)
10. Y4 (Output 4)
11. Y5 (Output 5)
12. Y6 (Output 6)
13. Y7 (Output 7)
14. VCC (Positive Power Supply)
15. /G2A (Enable Input 2)
16. /G2B (Enable Input 3)

Functional Features

• Converts a 3-bit binary input into one of eight output lines
• High-speed operation suitable for various digital applications
• Low power consumption
• Wide operating voltage range
• TTL-compatible inputs
• Balanced propagation delays

Advantages and Disadvantages

Advantages: - Fast and efficient decoding/demultiplexing functionality - Versatile application in digital circuits - Low power consumption - Wide operating voltage range allows compatibility with different systems

Disadvantages: - Limited number of input bits (3-bit) - May require additional components for complex applications

Working Principles

The MM74HC138MTCX operates based on the principle of binary decoding. The three address inputs (A0, A1, and A2) represent a binary code that selects one of the eight output lines (Y0 to Y7). The enable inputs (/G1, /G2A, and /G2B) control the operation of the decoder/demultiplexer.

When the enable inputs are active (low), the selected output line is determined by the binary input code. The decoder/demultiplexer converts the binary input into a corresponding output line, allowing data or signals to be routed to the desired destination.

Detailed Application Field Plans

The MM74HC138MTCX finds extensive use in various digital applications, including:

1. Address decoding in microprocessors and microcontrollers
2. Memory selection in RAM and ROM systems
3. Data routing in multiplexers and demultiplexers
4. Signal selection in communication systems
5. Control logic in digital circuits

Its versatility and high-speed operation make it suitable for a wide range of applications where decoding and demultiplexing functions are required.

Detailed and Complete Alternative Models

1. 74HC138: This is a similar decoder/demultiplexer IC from NXP Semiconductors.
2. CD74HC138: Texas Instruments offers this alternative model with similar functionality.
3. SN74HC138: Another alternative from Texas Instruments, providing the same decoding capabilities.

These alternative models offer comparable features and can be used as substitutes for the MM74HC138MTCX in various applications.

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