Overview
The LM239DT is a low-power quad voltage comparator produced by STMicroelectronics. This device consists of four independent precision-voltage comparators, each designed to operate from a single power supply over a wide range of voltages or from dual supplies. The LM239DT is packaged in a surface mount SOIC-14 package, making it suitable for a variety of applications where space and power efficiency are critical.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | +2 to +36 V or ±1 V to ±18 V | V |
| Supply Current | 1.1 mA (typ) | 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 | Includes ground | V |
| Differential Input Voltage Range | Equal to the supply voltage | V |
| Output Saturation Voltage | 250 mV (typ; ISINK = 4 mA) | mV |
| Output Compatibility | TTL, DTL, ECL, MOS, CMOS | - |
| Package Style | SOIC-14 | - |
| Mounting Method | Surface Mount | - |
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 LM239DT is versatile and can be used in a variety of applications, including:
- Threshold detectors and window comparators
- High and low limit detectors
- Line receivers and transmitters
- Analog-to-digital converters
- Level detection in power supplies and battery management systems
Q & A
- What is the supply voltage range of the LM239DT?
The LM239DT operates over a wide single supply voltage range of +2 to +36 V or from dual supplies of ±1 V to ±18 V.
- What is the typical supply current of the LM239DT?
The typical supply current is 1.1 mA, independent of the supply voltage.
- What is the input bias current of the LM239DT?
The input bias current is typically 25 nA.
- What is the input offset voltage of the LM239DT?
The input offset voltage is typically ±1 mV.
- Is the output of the LM239DT compatible with other logic families?
Yes, the output is compatible with TTL, DTL, ECL, MOS, and CMOS logic families.
- What is the package style and mounting method of the LM239DT?
The LM239DT is packaged in a SOIC-14 package and uses surface mount technology.
- What is the differential input voltage range of the LM239DT?
The differential input voltage range is equal to the supply voltage.
- What is the output saturation voltage of the LM239DT?
The output saturation voltage is typically 250 mV when ISINK = 4 mA.
- Can the LM239DT operate with a single power supply that includes ground in its common-mode voltage range?
Yes, the input common-mode voltage range includes ground.
- What are some common applications of the LM239DT?
Common applications include threshold detectors, window comparators, high and low limit detectors, line receivers and transmitters, and level detection in power supplies and battery management systems.
