The LMUN5114T1G is a PNP pre-biased bipolar transistor designed for compact and efficient circuit applications. Manufactured by Leshan, this transistor is widely used in switching and amplification circuits due to its built-in resistor network, which eliminates the need for external biasing resistors. It comes in a SOT-323-3 package, making it ideal for space-constrained applications.
Explores the technical specifications, features, applications, circuit design, and use case scenarios of the LMUN5114T1G transistor, making it easier for engineers and designers to integrate this component into their projects.
Technical Specifications of LMUN5114T1G
| Parameter | Value |
|---|
| Transistor Type | PNP Pre-Biased |
| Collector-Emitter Voltage (Vceo) | 50V |
| Collector Current (Ic) | 100mA |
| Base Resistor (R1) | 10kO |
| Base-Emitter Resistor (R2) | 47kO |
| Power Dissipation (Pd) | 202mW |
| Package | SOT-323-3 (SC-70) |
| Operating Temperature Range | -55°C to 150°C |
| RoHS Compliance | Yes |
Key Features of LMUN5114T1G
Integrated Resistors: Built-in bias resistors reduce external components, simplifying circuit design.
Compact SOT-323-3 Package: Ideal for small circuit boards and compact designs.
High Voltage & Current Ratings: Supports up to 50V and 100mA, suitable for low-power applications.
Pre-Biased Design: Eliminates the need for additional biasing resistors.
High Reliability: Wide operating temperature range ensures stability in various environments.
RoHS Compliant: Lead-free and environmentally friendly.
Applications of LMUN5114T1G
The LMUN5114T1G transistor is commonly used in various applications, including:
Signal Switching: Efficiently switches low-current signals in electronic circuits.
Digital Circuit Interfacing: Used in microcontroller and logic circuit interfacing.
Low-Power Amplification: Suitable for audio and signal amplification in portable devices.
Voltage Level Shifting: Helps in converting signal levels between circuits.
Load Driving Applications: Used to control small loads in power circuits.
Battery-Powered Devices: Suitable for compact, low-power electronics.
Circuit Diagram of LMUN5114T1G
Below is a basic circuit diagram using LMUN5114T1G in a switching application:
+5V
|
|
| |
| | 10kO (R1)
| |
|
|----> Output Signal
|
| |
| | 47kO (R2)
| |
|
|
C
|
----| LMUN5114T1G
|
E
|
GND
How It Works:
When a low logic signal is applied to the base, the transistor turns on, allowing current to flow from collector to emitter.
The pre-biased resistors (10kO and 47kO) ensure proper biasing, reducing the need for external components.
Used for signal amplification, switching, and logic interface applications.
Use Case Scenarios
1. Microcontroller Logic Level Shifting
Scenario: When interfacing a 5V microcontroller with a 3.3V logic device, voltage level shifting is required.
2. Battery-Powered Signal Switching
Scenario: A portable device requires a low-power signal switch for activating a peripheral.
3. Small-Signal Audio Amplification
Scenario: A low-power microphone preamplifier is needed for an embedded audio application.
4. LED Driver for IoT Devices
Scenario: A microcontroller needs to control an LED indicator without direct load handling.
Advantages of Using LMUN5114T1G
? Compact Size – Ideal for miniaturized circuits.
? Pre-Biased Design – Reduces external components.
? Efficient Performance – Handles up to 100mA and 50V.
? Versatile Applications – Suitable for switching, amplification, and interfacing.
? RoHS Compliant – Environmentally friendly component.
Where to Buy LMUN5114T1G?
The LMUN5114T1G transistor is available globally, including:
1. USA
2. India
3. Australia
4. Europe
You can purchase it from Xon Electronics and other leading online electronic component retailers.
Conclusion
The LMUN5114T1G PNP Pre-Biased Bipolar Transistor is an excellent choice for low-power switching, amplification, and digital circuit interfacing. Its pre-biased design, compact size, and high reliability make it a preferred component in modern electronics. Whether you are working on a microcontroller project, IoT device, or low-power amplifier, the LMUN5114T1G provides a cost-effective and efficient solution for your circuit design needs.
For engineers and designers looking for a reliable pre-biased transistor, the LMUN5114T1G offers excellent performance with minimal external components, making it a go-to choice for various applications.
Frequently Asked Questions (FAQs) About LMUN5114T1G Bipolar Transistor
1. What is the LMUN5114T1G transistor?
The LMUN5114T1G is a PNP pre-biased bipolar transistor manufactured by Leshan. It features an integrated resistor network, reducing the need for external components and simplifying circuit design.
2. What are the key specifications of the LMUN5114T1G?
- Type: PNP Pre-Biased Transistor
- Collector-Emitter Voltage (V<sub>CEO</sub>): 50V
- Collector Current (I<sub>C</sub>): 100mA
- Package: SOT-323-3
- Base Resistor (R1): 10kO
- Base-Emitter Resistor (R2): 47kO
3. What are the primary applications of the LMUN5114T1G?
This transistor is commonly used for:
- Signal switching applications
- Digital circuit interfacing
- Low-power amplification
- Voltage level shifting
4. How does the integrated resistor network benefit the LMUN5114T1G?
The built-in resistors simplify circuit design, eliminate the need for external biasing components, and reduce PCB space, making it ideal for compact electronics.
5. Can the LMUN5114T1G be used for amplification?
Yes, the LMUN5114T1G can function as a small-signal amplifier in low-power applications, thanks to its pre-biased design.
6. Where can I buy the LMUN5114T1G transistor?
This transistor is available from global electronic component distributors, including Xon Electronics, in the USA, India, Australia, and Europe.
7. What is the package type of the LMUN5114T1G?
The LMUN5114T1G comes in a compact SOT-323-3 (SC-70) surface-mount package, suitable for space-constrained applications.
8. Is the LMUN5114T1G RoHS compliant?
Yes, the LMUN5114T1G is RoHS-compliant, meaning it is free from hazardous substances and environmentally friendly.
9. Can I use the LMUN5114T1G in battery-powered applications?
Yes, its low power consumption and compact size make it suitable for battery-operated and portable devices.
10. Where can I find the datasheet for the LMUN5114T1G?
The official LMUN5114T1G datasheet can be downloaded from the Leshan manufacturer’s website or reputable electronic component distributors such as Xon Electronics.