Overview
The 74AHC138D-Q100 is a high-speed Si-gate CMOS 3-to-8 line decoder/demultiplexer produced by Nexperia. This device is designed to accept three binary weighted address inputs (A0, A1, and A2) and, when enabled, provides eight mutually exclusive outputs (Y0 to Y7) that are LOW when selected. It is pin compatible with Low power Schottky TTL (LSTTL) and complies with the JEDEC standard No. 7A. The device is qualified to the Automotive Electronics Council (AEC) standard Q100 (Grade 1), making it suitable for automotive applications.
Key Specifications
| Type Number | VCC (V) | Logic Switching Levels | Output Drive Capability (mA) | tpd (ns) | Power Dissipation Considerations | Tamb (°C) | Rth(j-a) (K/W) | Ψth(j-top) (K/W) | Rth(j-c) (K/W) | Package |
|---|---|---|---|---|---|---|---|---|---|---|
| 74AHC138D-Q100 | 2.0 - 5.5 | CMOS | ± 8 | 4.4 | Low | -40 ~ 125 | 93 | 9.7 | 52 | SO16 (SOT109-1) |
Key Features
- High-speed Si-gate CMOS technology
- 3-to-8 line decoder/demultiplexer with inverting outputs
- Three enable inputs: two active LOW (E1 and E2) and one active HIGH (E3)
- Multiple input enable for easy expansion to larger decoders
- Demultiplexing capability by using one of the active LOW enable inputs as the data input
- Inputs accept voltages higher than VCC
- ESD protection: HBM (ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V), CDM (ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V)
- Balanced propagation delays and Schmitt-trigger action on all inputs
- Ideal for memory chip select decoding
- Automotive product qualification in accordance with AEC-Q100 (Grade 1)
Applications
- Automotive electronics due to AEC-Q100 (Grade 1) qualification
- Memory chip select decoding
- Demultiplexing applications
- Expansion to larger decoders using multiple devices
- General-purpose decoding and demultiplexing in digital systems
Q & A
- What is the primary function of the 74AHC138D-Q100?
The primary function is to act as a 3-to-8 line decoder/demultiplexer.
- What are the input and output configurations of the 74AHC138D-Q100?
The device accepts three binary weighted address inputs (A0, A1, and A2) and provides eight mutually exclusive outputs (Y0 to Y7).
- How many enable inputs does the 74AHC138D-Q100 have and what are their states?
The device has three enable inputs: two active LOW (E1 and E2) and one active HIGH (E3).
- What is the operating temperature range of the 74AHC138D-Q100?
The operating temperature range is from -40 °C to +125 °C.
- Is the 74AHC138D-Q100 suitable for automotive applications?
- What type of logic switching levels does the 74AHC138D-Q100 operate with?
The device operates with CMOS input levels.
- What is the propagation delay time of the 74AHC138D-Q100?
The propagation delay time is 4.4 ns.
- Does the 74AHC138D-Q100 have ESD protection?
- What package options are available for the 74AHC138D-Q100?
The device is available in SO16 (SOT109-1) and other package options like TSSOP.
- Can the 74AHC138D-Q100 be used as a demultiplexer?
