SM74HC138D

The SM74HC138D is a high-speed CMOS 3-to-8 line decoder/demultiplexer from Texas Instruments. It decodes three binary address inputs (A0, A2, A3) into one of eight active-low outputs (Y0-Y7), with three enable inputs (E1, E2, E3) for control.
### Key Features:
- Logic Type: Decoder/Demultiplexer
- Input Voltage: 2V to 6V (HC CMOS compatible)
- Low Power Consumption: Typical 4µA standby current
- High Noise Immunity: CMOS technology
- Fast Propagation Delay: ~13ns (at 5V)
### Applications:
- Memory address decoding
- Data routing in digital systems
- Signal demultiplexing
### Package:
- SOIC-16 (Surface Mount)
The 74HC138D is widely used in digital circuits for efficient signal distribution and selection. Its low power and high-speed operation make it ideal for embedded systems and microcontroller interfacing.

The SM74HC138D is a high-speed CMOS 3-to-8 line decoder/demultiplexer with the following key features:
- Logic Function: Converts 3 binary inputs (A0-A2) into 8 mutually exclusive active-low outputs (Y0-Y7).
- Active-Low Enable Pins: Features three enable inputs (E1, E2, E3) for flexible control (E1 & E2 active-low, E3 active-high).
- Wide Operating Voltage: 2V to 6V, compatible with TTL levels.
- Low Power Consumption: Typical 4µA static current.
- High-Speed Operation: Propagation delay of ~17ns at 5V.
- Output Drive Capability: Can sink/sink 5.2mA at 6V.
- Package: SOIC-16 (surface-mount).
Ideal for memory decoding, data routing, and address selection in digital systems.

The SM74HC138D is manufactured by Texas Instruments (TI), a leading American semiconductor company.
TI is a global technology firm specializing in analog and digital semiconductor design, producing a wide range of integrated circuits (ICs) for industries like automotive, industrial, and consumer electronics. Known for innovation and reliability, TI is one of the largest chip manufacturers worldwide.
The SM74HC138D is a 3-to-8 line decoder/demultiplexer IC from TI's 74HC logic family, widely used in digital circuit applications.

The SM74HC138D is a 3-to-8 line decoder/demultiplexer IC used in:
1. Address Decoding – Expands microcontroller/memory address lines.
2. Memory Selection – Enables chip select signals in RAM/ROM systems.
3. Data Routing – Directs signals in multiplexed communication systems.
4. Display Driving – Controls LED/LCD segments in multiplexed displays.
5. Logic Expansion – Converts fewer control lines into multiple outputs.
Common in digital circuits, embedded systems, and industrial automation.

The SM74HC138D is a 3-to-8 line decoder/demultiplexer IC, packaged in a SOIC-16 (Small Outline Integrated Circuit) housing. This surface-mount package has 16 pins and is commonly used for space-efficient PCB designs. It operates with a supply voltage of 2V to 6V and is compatible with TTL levels. The package type ensures reliable performance in digital logic applications.