Overview
The 74HC138D,653 is a 3-to-8 line decoder/demultiplexer IC produced by Nexperia USA Inc. This device decodes three binary weighted address inputs (A0, A1, and A2) to 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 74HC138D is part of Nexperia’s extensive portfolio of logic ICs, known for their high performance and versatility across various applications.
Key Specifications
| Parameter | Value |
|---|---|
| Type number | 74HC138D |
| Orderable part number | 74HC138D,653 |
| Package | SOT109-1 (SO16) |
| VCC (V) | 2.0 - 6.0 |
| Logic switching levels | CMOS |
| Output drive capability (mA) | ± 5.2 |
| tpd (ns) | 12 |
| Power dissipation considerations | Low power dissipation |
| Tamb (°C) | -40 to +125 |
| ESD protection | HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V, CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V |
Key Features
- Decodes three binary weighted address inputs to eight mutually exclusive outputs.
- Three enable inputs (E1, E2, and E3) for easy parallel expansion and demultiplexing.
- 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.
- Active LOW mutually exclusive outputs.
- Inputs include clamp diodes for interfacing with voltages in excess of VCC.
- Complies with JEDEC standards: JESD8C (2.7 V to 3.6 V) and JESD7A (2.0 V to 6.0 V).
Applications
The 74HC138D is ideal for various applications, including:
- Memory chip select decoding.
- Demultiplexing in digital circuits.
- Parallel expansion to larger decoders.
- Automotive and industrial electronics.
- Consumer and mobile devices.
- Computing and power management systems.
Q & A
- What is the primary function of the 74HC138D IC?
The primary function of the 74HC138D is to decode three binary weighted address inputs to eight mutually exclusive outputs, and it can also be used as a demultiplexer. - What are the enable inputs used for in the 74HC138D?
The three enable inputs (E1, E2, and E3) are used for controlling the output states and for easy parallel expansion. - What is the supply voltage range for the 74HC138D?
The supply voltage range is from 2.0 to 6.0 V. - What are the logic switching levels for the 74HC138D?
The logic switching levels are CMOS. - What is the output drive capability of the 74HC138D?
The output drive capability is ± 5.2 mA. - What is the propagation delay (tpd) of the 74HC138D?
The propagation delay is 12 ns. - Does the 74HC138D have ESD protection?
Yes, it has ESD protection: HBM exceeds 2000 V and CDM exceeds 1000 V. - What are the operating temperature ranges for the 74HC138D?
The operating temperature ranges are from -40 to +125 °C. - Can the 74HC138D be used in high-noise environments?
Yes, it has high noise immunity. - What are some common applications of the 74HC138D?
Common applications include memory chip select decoding, demultiplexing, and use in automotive, industrial, consumer, and mobile devices.
