Overview
The 74HC238PW,118 is a 3-to-8 line decoder/demultiplexer produced by Nexperia USA Inc. This high-speed Si-gate CMOS device is designed to decode 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 device is pin compatible with Low-Power Schottky TTL (LSTTL) and is suitable for a wide range of applications due to its low power dissipation and high noise immunity.
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 |
Key Features
- Decoding and Demultiplexing Capability: Decodes three binary weighted address inputs to eight mutually exclusive outputs.
- Multiple Enable Inputs: Features three enable inputs (E1, E2, and E3) for flexible control over output states.
- Low Power Dissipation: CMOS technology ensures low power consumption.
- High Noise Immunity: Provides high noise immunity, making it reliable in noisy environments.
- Wide Supply Voltage Range: Operates over a wide supply voltage range from 2.0 to 6.0 V.
- ESD Protection: Offers ESD protection with HBM exceeding 2000 V and CDM exceeding 1000 V.
- Compliance with Standards: Complies with JEDEC standards JESD8C and JESD7A.
Applications
- Memory Chip Select Decoding: Ideal for decoding memory chip select lines.
- Demultiplexing: 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.
- Industrial and Automotive Systems: Suitable for use in industrial and automotive applications due to its robustness and reliability.
- Consumer Electronics: Used in various consumer electronic devices requiring decoding and demultiplexing functions.
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 are the logic switching levels for the 74HC238PW?
The logic switching levels for the 74HC238PW are CMOS levels.
- What is the supply voltage range for the 74HC238PW?
The supply voltage range for the 74HC238PW is from 2.0 to 6.0 V.
- 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.
- Does the 74HC238PW have ESD protection?
Yes, the 74HC238PW has ESD protection with HBM exceeding 2000 V and CDM exceeding 1000 V.
- 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 options are available for the 74HC238PW?
The 74HC238PW is available in a TSSOP16 package.
- Is the 74HC238PW compliant with any industry standards?
Yes, the 74HC238PW complies with JEDEC standards JESD8C and JESD7A.
- Can the 74HC238PW be used in 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.
