Overview
The LM239PT, produced by STMicroelectronics, is a low-power quad voltage comparator. This device is part of the LM139, LM239, and LM339 family, known for their precision and versatility. Each comparator in the LM239PT is designed to operate from a single power supply over a wide range of voltages, from +2 to +36 V, or from dual supplies ranging from ±1 V to ±18 V. The input common-mode voltage range includes ground, even when operated from a single power supply voltage, making it highly adaptable for various applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | +2 to +36 V or ±1 V to ±18 V | V |
| Supply Current | 1.1 mA | mA |
| Input Bias Current | 25 nA (typ) | nA |
| Input Offset Current | ±5 nA (typ) | nA |
| Input Offset Voltage | ±1 mV (typ) | mV |
| Input Common-Mode Voltage Range | 0 to (VCC+ - 1.5 V) | V |
| Output Saturation Voltage | 250 mV (typ, ISINK = 4 mA) | mV |
| Differential Input Voltage Range | Equal to the supply voltage | V |
| Operating Temperature Range | -40 to +105 °C | °C |
| Package Type | TSSOP-14 |
Key Features
- Wide single supply voltage range or dual supplies: +2 to +36 V or ±1 V to ±18 V
- Very low supply current (1.1 mA) independent of supply voltage
- Low input bias current: 25 nA typ
- Low input offset current: ±5 nA typ
- Low input offset voltage: ±1 mV typ
- Input common-mode voltage range includes ground
- Low output saturation voltage: 250 mV typ (ISINK = 4 mA)
- Differential input voltage range equal to the supply voltage
- TTL, DTL, ECL, MOS, CMOS compatible outputs
Applications
The LM239PT is suitable for a variety of applications due to its versatility and precision. Common uses include:
- Threshold detectors and window comparators
- Analog-to-digital converters
- Level detectors and zero-crossing detectors
- Pulse generators and multivibrators
- Line receivers and transceivers
Q & A
- What is the supply voltage range for the LM239PT?
The LM239PT can operate from a single supply voltage of +2 to +36 V or from dual supplies ranging from ±1 V to ±18 V.
- What is the typical supply current of the LM239PT?
The typical supply current is 1.1 mA, independent of the supply voltage.
- What is the input bias current of the LM239PT?
The input bias current is typically 25 nA.
- What is the input offset voltage of the LM239PT?
The input offset voltage is typically ±1 mV.
- Does the input common-mode voltage range include ground?
- What is the output saturation voltage of the LM239PT?
The output saturation voltage is typically 250 mV when the sink current (ISINK) is 4 mA.
- Is the LM239PT compatible with various logic families?
- What is the operating temperature range of the LM239PT?
The operating temperature range is -40 to +105 °C.
- In what package types is the LM239PT available?
The LM239PT is available in a TSSOP-14 package.
- What are some common applications of the LM239PT?
