Overview
The 74HC138DB,112 is a 3-to-8 line decoder/demultiplexer integrated circuit manufactured by Nexperia USA Inc. This device is part of the 74HC series and is designed to decode three binary weighted address inputs (A0, A1, and A2) into eight mutually exclusive outputs (Y0 to Y7). It features three enable inputs (E1, E2, and E3), allowing for easy parallel expansion and demultiplexing capabilities. The 74HC138DB,112 is suitable for a wide range of applications due to its CMOS logic, low power dissipation, and high noise immunity.
Key Specifications
| Parameter | Value |
|---|---|
| Type | Decoder/Demultiplexer |
| Logic Family | HC (CMOS) |
| Number of Inputs | 3 |
| Number of Outputs | 8 |
| Supply Voltage | 2V ~ 6V |
| Output Drive Capability | ± 5.2mA |
| Propagation Delay Time | 12 ns |
| Operating Temperature | -40°C ~ 125°C |
| Package Type | 16-SSOP (0.209", 5.30mm Width) |
| Mounting Type | Surface Mount |
| Independent Circuits | 1 |
| Circuit | 1 x 3:8 |
Key Features
- Wide supply voltage range from 2.0 to 6.0 V
- CMOS low power dissipation
- High noise immunity
- Latch-up performance exceeds 100 mA per JESD 78 Class II Level B
- Demultiplexing capability
- Multiple input enable for easy expansion
- Ideal for memory chip select decoding
- Active LOW mutually exclusive outputs
- Input levels: CMOS level for 74HC138
- Complies with JEDEC standards: JESD8C (2.7 V to 3.6 V) and JESD7A (2.0 V to 6.0 V)
- ESD protection: HBM JESD22-A114F exceeds 2000 V and MM JESD22-A115-A exceeds 200 V
Applications
The 74HC138DB,112 is versatile and can be used in various applications, including:
- Memory chip select decoding
- Demultiplexing operations
- Parallel expansion to higher line decoders (e.g., 1-of-32 lines with four 138 ICs and one inverter)
- General digital logic circuits requiring decoding or demultiplexing functions
- Automotive and industrial control systems due to its automotive temperature range and robust specifications
Q & A
- What is the function of the 74HC138DB,112?
The 74HC138DB,112 is a 3-to-8 line decoder/demultiplexer that decodes three binary weighted address inputs into eight mutually exclusive outputs. - What is the supply voltage range for the 74HC138DB,112?
The supply voltage range is from 2.0 to 6.0 V. - What are the output drive capabilities of the 74HC138DB,112?
The output drive capabilities are ± 5.2mA. - What is the operating temperature range for the 74HC138DB,112?
The operating temperature range is from -40°C to 125°C. - What package type is the 74HC138DB,112 available in?
The 74HC138DB,112 is available in a 16-SSOP package. - How many enable inputs does the 74HC138DB,112 have?
The device has three enable inputs (E1, E2, and E3). - Can the 74HC138DB,112 be used as a demultiplexer?
Yes, it can be used as an eight output demultiplexer by using one of the active LOW enable inputs as the data input and the remaining enable inputs as strobes. - What are the logic levels for the 74HC138DB,112?
The logic levels are CMOS for the 74HC138 series. - Does the 74HC138DB,112 comply with any JEDEC standards?
Yes, it complies with JEDEC standards: JESD8C (2.7 V to 3.6 V) and JESD7A (2.0 V to 6.0 V). - What is the propagation delay time for the 74HC138DB,112?
The propagation delay time is 12 ns.
