Overview
The MC74LCX138DTG is a high-performance, low-voltage CMOS 3-to-8 decoder/demultiplexer produced by onsemi. This device operates within a voltage range of 2.3 to 3.6 V, making it suitable for a variety of applications requiring low power consumption and high-speed operation. The MC74LCX138DTG features 5 V-tolerant inputs, allowing it to interface seamlessly with 5 V TTL logic devices. It is designed for memory address decoding and other TTL level bus-oriented applications.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| VCC (Supply Voltage) | 2.3 | - | 3.6 | V |
| VI (Input Voltage) | 0 | - | 5.5 | V |
| VO (Output Voltage) | 0 | - | VCC + 0.5 | V |
| IOH (HIGH Level Output Current) | -24 | - | - | mA |
| IOL (LOW Level Output Current) | 24 | - | - | mA |
| ICC (Quiescent Supply Current) | - | - | 10 | μA |
| TA (Operating Free-Air Temperature) | -40 | - | 85 | °C |
| tPLH/tPHL (Propagation Delay An to On) | 1.5 | - | 7.2 | ns |
Key Features
- Designed for 2.3 V to 3.6 V VCC operation
- 5 V tolerant inputs for interface capability with 5 V TTL logic
- LVTTL and LVCMOS compatible
- 24 mA balanced output sink and source capability
- Near zero static supply current, substantially reducing system power requirements
- Latchup performance exceeds 500 mA
- ESD performance: Human Body Model >2000 V, Machine Model >200 V
- AEC-Q100 qualified and PPAP capable for automotive and other applications requiring unique site and control change requirements
- Pb-free, halogen-free/BFR-free, and RoHS compliant
Applications
The MC74LCX138DTG is suitable for various applications, including:
- Memory address decoding
- TTL level bus-oriented applications
- Demultiplexing functions by using one of the active-LOW Enable inputs as the data input and the other Enable inputs as strobes
- Parallel expansion to a 1-of-32 decoder with just four LCX138 devices and one inverter
- Automotive and industrial applications requiring high reliability and low power consumption
Q & A
- What is the operating voltage range of the MC74LCX138DTG?
The MC74LCX138DTG operates within a voltage range of 2.3 to 3.6 V.
- What is the significance of 5 V tolerant inputs in the MC74LCX138DTG?
The 5 V tolerant inputs allow the device to be safely driven from 5 V devices, enabling compatibility with 5 V TTL logic.
- What are the output current capabilities of the MC74LCX138DTG?
The device has a balanced output sink and source capability of 24 mA.
- How does the MC74LCX138DTG reduce system power requirements?
The device has near zero static supply current, substantially reducing system power requirements.
- What are the ESD performance specifications of the MC74LCX138DTG?
The device has ESD performance of Human Body Model >2000 V and Machine Model >200 V.
- Is the MC74LCX138DTG suitable for automotive applications?
- How can the MC74LCX138DTG be used as a demultiplexer?
The device can be used as an 8-output demultiplexer by using one of the active-LOW Enable inputs as the data input and the other Enable inputs as strobes.
- What is the maximum propagation delay of the MC74LCX138DTG?
The maximum propagation delay (tPLH/tPHL) is approximately 7.2 ns.
- Is the MC74LCX138DTG RoHS compliant?
- How can the MC74LCX138DTG be expanded to a 1-of-32 decoder?
The device can be expanded to a 1-of-32 decoder with just four LCX138 devices and one inverter.
