Overview
The 74HC238D,652 is a 3-to-8 line decoder/demultiplexer integrated circuit manufactured by Nexperia. 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 74HC238D is part of the 74HC/HCT family, known for its CMOS 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 74HC238D | 2.0 - 6.0 | CMOS | ± 5.2 | 14 | low | -40 ~ 125 | 93 | 10 | 53 | SO16 (SOT109-1) |
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 and high noise immunity.
- Inputs include clamp diodes for interfacing with voltages in excess of VCC.
- Complies with JEDEC standards (JESD8C and JESD7A).
- ESD protection: HBM exceeds 2000 V, CDM exceeds 1000 V.
- Latch-up performance exceeds 100 mA per JESD 78 Class II Level B.
Applications
The 74HC238D is versatile and can be used in various applications, including:
- Memory chip select decoding.
- Demultiplexing applications by using one of the active LOW enable inputs as the data input and the remaining enable inputs as strobes.
- Industrial, automotive, power, computing, consumer, mobile, and wearable electronics due to its wide operating temperature range and low power consumption.
Q & A
- What is the primary function of the 74HC238D?
The primary function of the 74HC238D is to decode three binary weighted address inputs to eight mutually exclusive outputs.
- What are the logic switching levels for the 74HC238D?
The logic switching levels for the 74HC238D are CMOS.
- What is the output drive capability of the 74HC238D?
The output drive capability of the 74HC238D is ± 5.2 mA).
- What is the operating temperature range for the 74HC238D?
The operating temperature range for the 74HC238D is -40°C to 125°C).
- How many enable inputs does the 74HC238D have?
The 74HC238D has three enable inputs (E1, E2, and E3)).
- What is the package type for the 74HC238D,652?
The package type for the 74HC238D,652 is SO16 (SOT109-1)).
- Does the 74HC238D comply with any specific standards?
Yes, the 74HC238D complies with JEDEC standards (JESD8C and JESD7A)).
- What is the ESD protection level for the 74HC238D?
The ESD protection level for the 74HC238D exceeds 2000 V for HBM and 1000 V for CDM).
- Can the 74HC238D be used as a demultiplexer?
Yes, the 74HC238D 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 some common applications for the 74HC238D?
The 74HC238D is commonly used in memory chip select decoding, demultiplexing applications, and various electronic designs across industrial, automotive, and consumer electronics).
