74HC138 - 3-to-8 line Decoder/Demultiplexer IC
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74HC138 - 3-to-8 line Decoder/Demultiplexer IC The 74HC Series 74HC138 decoder utilizes advanced silicon-gate CMOS technology and is well suited to memory address decoding or data routing applications. The circuit features high noise immunity and low power consumption usually associated with CMOS circuitry, yet has speeds comparable to low-power Schottky TTL logic. The 74HC138 has 3 binary select inputs (A, B, and C). If the device is enabled, these inputs determine which one of the eight normally HIGH outputs will go LOW. Two active LOW and one active HIGH enable (G1, G2A, and G2B) are provided to ease the cascading of decoders. The decoder’s outputs can drive 10 low-power Schottky TTL equivalent loads, and are functionally and pin equivalent to the 74LS138. All inputs are protected from damage due to static discharge by diodes to VCC and the ground. Pinout: Pinout Of 74HC138 IC Also check the 74139 Dual Decoder-Demux IC . It is a digital logic IC used to convert a two-line binary input signal into one of four output signals. The IC has two active-low enable inputs (E1 and E2) and two data inputs (D1 and D2). When both enable inputs are high, the outputs are inactive, and when one of the enabled inputs is low, the corresponding data input is passed through to the outputs.
- 3-to-8 line decoder/demultiplexer with active-LOW outputs
- Wide operating voltage: 2V to 6V (3.3V/5V compatible)
- Enable pins for easy cascading and expansion
- High noise immunity and low power CMOS technology
- Pin and function compatible with 74LS138
- ESD-protected inputs for enhanced reliability
- Ideal for memory address decoding and data routing
- Supports cascading for expanded decoding (e.g., 4-to-16)
- Low power consumption and high-speed operation
- Compatible with Arduino, Raspberry Pi, ESP32, and more
- Robust ESD protection on all inputs
| Supply Voltage (VCC | ? 0.5 to + 7.0V DC |
|---|---|
| Input Voltage (VIN) | ?0.5V to VDD + 0.5V |
| Output Voltage (VOUT) | ? 0.5 to VCC + 0.5V |
| Clamp Diode Current (IIK, IOK) | ± 20 mA |
| DC Output Current, per pin (IOUT) | ± 25 mA |
| DC VCC or GND Current, per pin (ICC) | ± 50 mA |
| Storage Temperature Range (TSTG) | ? 65°C to + 150°C |
| Power Dissipation (PD) (Note 4) | 600 mW |
| S.O. Package only | 500 mW |
| Lead Temperature (TL) (Soldering 10 seconds) | 260°C |
What is the function of the 74HC138 IC?
It converts 3 binary inputs into one of 8 active-LOW outputs, used for address decoding and data routing.
Is the 74HC138 compatible with Arduino and Raspberry Pi?
Yes, it supports 3.3V and 5V logic and works seamlessly with Arduino, Raspberry Pi, and other MCUs.
Can I cascade multiple 74HC138 ICs for more outputs?
Yes, use the enable pins to cascade ICs and create 4-to-16 or 5-to-32 line decoders.
What is the supply voltage range for 74HC138?
It operates from 2V to 6V, suitable for both 3.3V and 5V digital systems.
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About 74HC138 - 3-to-8 line Decoder/Demultiplexer IC by Iotcart
Shop 74HC138 Decoder IC – 3-to-8 line CMOS, 2V-6V logic. Compatible with Arduino & Raspberry Pi. Fast delivery in India.
Categorised under: 74HC IC Series› Integrated Circuits