Overview
The 74HC238PW/S911118 is a 3-to-8 line decoder/demultiplexer integrated circuit produced by Nexperia (previously part of NXP 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 flexible control over the output states. The 74HC238PW is widely used in various electronic designs due to its versatility and robust specifications.
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 name |
|---|---|---|---|---|---|---|---|---|---|---|
| 74HC238PW | 2.0 - 6.0 | CMOS | ± 5.2 | 14 | Low | -40 to +125 | 126 | 4.8 | 55.6 | TSSOP16 (SOT403-1) |
Key Features
- Multiple Enable Inputs: Features three enable inputs (E1, E2, and E3) allowing for easy parallel expansion and flexible control over output states.
- Wide Supply Voltage Range: Operates from 2.0 to 6.0 V, making it versatile for various applications.
- CMOS Low Power Dissipation: Offers low power consumption, ideal for energy-efficient designs.
- High Noise Immunity: Provides robust performance in noisy environments.
- Demultiplexing Capability: Can be used as an eight-output demultiplexer by utilizing one of the active LOW enable inputs as the data input and the remaining enable inputs as strobes.
- ESD Protection: Complies with ANSI/ESDA/JEDEC JS-001 class 2 (exceeds 2000 V) and ANSI/ESDA/JEDEC JS-002 class C3 (exceeds 1000 V).
- Compliance with JEDEC Standards: Meets JESD8C (2.7 V to 3.6 V) and JESD7A (2.0 V to 6.0 V) standards.
Applications
The 74HC238PW is ideal for various applications, including:
- Memory Chip Select Decoding: Used in memory systems to select specific memory chips.
- Industrial and Automotive Systems: Suitable for use in industrial and automotive environments due to its robust specifications and wide operating temperature range.
- Consumer Electronics: Found in consumer electronics for decoding and demultiplexing functions.
- Computing and Power Systems: Used in computing and power systems where reliable and efficient decoding is required.
Q & A
- What is the primary function of the 74HC238PW?
The primary function of the 74HC238PW is to decode three binary weighted address inputs to eight mutually exclusive outputs, and it can also be used as a demultiplexer.
- What is the supply voltage range for the 74HC238PW?
The supply voltage range for the 74HC238PW is from 2.0 to 6.0 V.
- What are the logic switching levels for the 74HC238PW?
The logic switching levels for the 74HC238PW are CMOS levels.
- How many enable inputs does the 74HC238PW have?
The 74HC238PW has three enable inputs (E1, E2, and E3).
- What is the output drive capability of the 74HC238PW?
The output drive capability of the 74HC238PW is ± 5.2 mA.
- What is the typical propagation delay for the 74HC238PW?
The typical propagation delay for the 74HC238PW is 14 ns.
- Does the 74HC238PW have ESD protection?
Yes, the 74HC238PW has ESD protection exceeding 2000 V (HBM) and 1000 V (CDM).
- What are the operating temperature ranges for the 74HC238PW?
The operating temperature ranges for the 74HC238PW are from -40 °C to +125 °C.
- What package type is the 74HC238PW available in?
The 74HC238PW is available in a TSSOP16 (SOT403-1) package.
- Can the 74HC238PW be used for parallel expansion?
Yes, the 74HC238PW can be used for parallel expansion to create a 1-of-32 decoder with just four '238 ICs and one inverter.
