LM239 consists of four independent precision voltage comparators with offset voltage specifications as low as 2mV. The IC has a distinct advantage over conventional comparators in terms of operating efficiency. The output of the IC always comes in TTL which makes it easy to work with other TTL devices and microcontrollers. The IC also offers a wide range of applications such as high operating speed, fan-in/fan-out capabilities, and low production cost, etc.
Voltage Comparators
A voltage comparator is a simple electronic configuration, that compares two voltages at two different levels, and then switches the output to wither LOW or HIGH state with respect to a voltage that is at a higher level then the other. In other words, a voltage comparator compares the magnitude of two voltage inputs and determines which is the largest of the two. There are two main types of voltage comparators:
- Non inverting Comparators
- Inverting Comparators
LM239 Pinout
LM239 Pin Configuration
| Pin No | Pin Name | Description |
|---|---|---|
| 1 | OUTPUT 2 | Output Of Comparator 2 |
| 2 | OUTPUT 1 | Output Of Comparator 1 |
| 3 | VCC+ | Positive Supply Voltage |
| 4 | INV-INPUT 1 | Inverting Input Of Comparator 1 |
| 5 | NON-INV-INPUT 1 | Non Inverting Input Of Comparator 1 |
| 6 | INV-INPUT 2 | Inverting Input Of Comparator 2 |
| 7 | NON-INV-INPUT 2 | Non Inverting Input Of Comparator 2 |
| 8 | INV-INPUT 3 | Inverting Input Of Comparator 3 |
| 9 | NON-INV-INPUT 3 | Non Inverting Input Of Comparator 3 |
| 10 | INV-INPUT 4 | Inverting Input Of Comparator 4 |
| 11 | NON-INV-INPUT 4 | Non Inverting Input Of Comparator 4 |
| 12 | VCC- | Negative Supply Voltage |
| 13 | OUTPUT 4 | Output Of Comparator 4 |
| 14 | OUTPUT 3 | Output Of Comparator 3 |
Order Codes
| Part No | Temp: Range |
|---|---|
| LM139,A | -55, +125oC |
| LM239,A | -40, +105oC |
| LM339,A | 0, +70oC |
LM239 Features
- LOW INPUT BIAS CURRENT : 25nA TYP
- LOW INPUT OFFSET CURRENT : ±5nA TYP
- LOW INPUT OFFSET VOLTAGE : ±1mV TYP
- INPUT COMMON-MODE VOLTAGE RANGE INCLUDES GROUND
- LOW OUTPUT SATURATION VOLTAGE : 250mV TYP. (IO = 4mA)
- DIFFERENTIAL INPUT VOLTAGE RANGE EQUAL TO THE SUPPLY VOLTAGE
- VERY LOW SUPPLY CURRENT (1.1mA) INDEPENDENT OF SUPPLY VOLTAGE (1.4mW/comparator at +5V)
Application
- Limit Comparators
- Automotive
- – Infotainment and Clusters
- – Body Control Modules
- Power Supervision
- Logic Voltage Translation
- Simple Analog-to-Digital Converters (ADCs)
- Pulse
- Square wave
- Time Delay Generators
LM239 Datasheet
You can download this datasheet for LM239 Low Power Quad Comparator from the link given below:
See Also: CD4060 14-Stage Ripple-Carry Binary Counter -Datasheet | CD4066 Quad Bilateral Switch – Datasheet | CD4050 Hex Buffer Converter (N-inverting) – Datasheet
