Overview
The 74HCT238DB,118 is a 3-to-8 line decoder/demultiplexer integrated circuit produced by Nexperia USA Inc. This device is part of the 74HC/T series, known for its high performance and versatility in digital circuit applications. Although the specific part number 74HCT238DB,118 is listed as obsolete, the general functionality and characteristics of the 74HCT238 series remain relevant and widely used in various electronic designs.
Key Specifications
| Parameter | Conditions | Min | Typ | Max |
|---|---|---|---|---|
| VCC (Supply Voltage) | 2.0 V to 6.0 V | 2.0 | - | 6.0 |
| VIH (HIGH-level input voltage) | VCC = 4.5 V to 5.5 V | 2.0 | 1.6 | 2.0 |
| VIL (LOW-level input voltage) | VCC = 4.5 V to 5.5 V | - | 0.8 | 1.2 |
| VOH (HIGH-level output voltage) | IO = -4.0 mA, VCC = 4.5 V | 3.98 | 4.32 | 3.84 |
| VOL (LOW-level output voltage) | IO = 4.0 mA, VCC = 4.5 V | -0.16 | 0.26 | 0.4 |
| Operating Temperature | -40 °C to +125 °C | -40 | - | 125 |
| Package Type | SO16, TSSOP16 | - | - | - |
Key Features
- Decodes three binary weighted address inputs (A0, A1, and A2) to eight mutually exclusive outputs (Y0 to Y7).
- Features three enable inputs (E1, E2, and E3) allowing for easy parallel expansion and demultiplexing capability.
- Wide supply voltage range from 2.0 to 6.0 V.
- CMOS low power dissipation and high noise immunity.
- Complies with JEDEC standards (JESD8C and JESD7A).
- ESD protection: HBM JESD22-A114F exceeds 2000 V, MM JESD22-A115-A exceeds 200 V.
Applications
The 74HCT238 is widely used in various digital circuit applications, including:
- Memory chip select decoding.
- Demultiplexing and decoding in digital systems.
- Industrial and consumer electronics where low power consumption and high reliability are crucial.
- Automotive and computing systems requiring robust and efficient decoding solutions.
Q & A
- What is the primary function of the 74HCT238? The primary function of the 74HCT238 is to decode three binary weighted address inputs to eight mutually exclusive outputs and to act as a demultiplexer.
- What is the supply voltage range for the 74HCT238? The supply voltage range for the 74HCT238 is from 2.0 to 6.0 V.
- What are the enable inputs used for in the 74HCT238? The three enable inputs (E1, E2, and E3) allow for easy parallel expansion and demultiplexing capability.
- What are the output characteristics of the 74HCT238? The outputs are active HIGH and mutually exclusive, meaning only one output will be HIGH at any given time unless the enable conditions are not met.
- What are the temperature ranges for the 74HCT238? The operating temperature range is from -40 °C to +125 °C.
- Does the 74HCT238 have ESD protection? Yes, it has ESD protection: HBM JESD22-A114F exceeds 2000 V, MM JESD22-A115-A exceeds 200 V.
- What are the common applications of the 74HCT238? It is used in memory chip select decoding, demultiplexing, industrial and consumer electronics, automotive, and computing systems.
- Is the 74HCT238DB,118 still in production? No, the specific part number 74HCT238DB,118 is listed as obsolete.
- What package types are available for the 74HCT238? It is available in SO16 and TSSOP16 packages.
- Does the 74HCT238 comply with any industry standards? Yes, it complies with JEDEC standards (JESD8C and JESD7A).
