Overview
The 74LVC139DB,112, produced by Nexperia USA Inc., is a dual 2-to-4 line decoder/demultiplexer integrated circuit. This component decodes two binary weighted address inputs (nA0, nA1) to four mutually exclusive outputs (nY0 to nY3). Each decoder features an enable input (nE) that, when set to HIGH, forces all outputs to HIGH, allowing for 1-to-4 demultiplexer functionality. The device is designed to operate in mixed 3.3 V and 5 V environments, making it versatile for various applications.
Key Specifications
| Parameter | Description |
|---|---|
| Supply Voltage Range | 1.2 V to 3.6 V |
| Input Voltage Range | Up to 5.5 V |
| Enable Input | nE (HIGH forces all outputs HIGH) |
| Address Inputs | nA0, nA1 (binary weighted) |
| Outputs | nY0 to nY3 (mutually exclusive) |
| Operating Temperature Range | -40 °C to +85 °C and -40 °C to +125 °C |
| ESD Protection | HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V, CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V |
| Package Options | Multiple package types (though the specific part number is obsolete) |
Key Features
- Wide supply voltage range from 1.2 V to 3.6 V
- Overvoltage tolerant inputs up to 5.5 V
- CMOS low power dissipation
- Direct interface with TTL levels
- Demultiplexing capability
- Two independent 2-to-4 decoders
- Multifunction capability
- Mutually exclusive outputs
- Schmitt-trigger action at all inputs for slower input rise and fall times tolerance
- Output drive capability for 50 Ω transmission lines at 125 °C
- Compliance with JEDEC standards (JESD8-7A, JESD8-5A, JESD8-C/JESD36)
Applications
The 74LVC139DB is suitable for a variety of applications, including:
- Mixed 3.3 V and 5 V environment systems
- Decoder and demultiplexer functions in digital circuits
- Data translation between different voltage levels
- Systems requiring low power consumption and high ESD protection
Q & A
- What is the primary function of the 74LVC139DB?
The primary function is to decode two binary weighted address inputs to four mutually exclusive outputs and to act as a 1-to-4 demultiplexer.
- What is the supply voltage range for the 74LVC139DB?
The supply voltage range is from 1.2 V to 3.6 V.
- Can the 74LVC139DB operate in mixed voltage environments?
- What is the role of the enable input (nE) in the 74LVC139DB?
The enable input (nE), when set to HIGH, forces all outputs to HIGH.
- What kind of ESD protection does the 74LVC139DB offer?
The device offers HBM protection exceeding 2000 V and CDM protection exceeding 1000 V.
- Is the 74LVC139DB,112 part number still in production?
No, the 74LVC139DB,112 part number is obsolete and no longer manufactured.
- What are some key features of the 74LVC139DB?
Key features include wide supply voltage range, overvoltage tolerant inputs, CMOS low power dissipation, and direct interface with TTL levels.
- What standards does the 74LVC139DB comply with?
The device complies with JEDEC standards JESD8-7A, JESD8-5A, and JESD8-C/JESD36.
- What is the operating temperature range for the 74LVC139DB?
The operating temperature range is from -40 °C to +85 °C and from -40 °C to +125 °C.
- What type of action do the inputs of the 74LVC139DB have?
The inputs have Schmitt-trigger action, making the circuit tolerant of slower input rise and fall times.
