The LM393 is a Dual in package comparator IC, meaning the IC has two comparators inside a single 8-pin package.
Pin Configuration
| Pin Number | Pin Name | Description |
| 1 | OUTPUT1 | Output of Op-Amp 1 |
| 2 | INPUT1- | Inverting Input of Op-Amp 1 |
| 3 | INPUT1+ | Non-Inverting Input of Op-Amp 1 |
| 4 | VEE,GND | Ground or Negative Supply Voltage |
| 5 | INPUT2+ | Non-Inverting Input of Op-Amp 2 |
| 6 | INPUT2- | Inverting Input of Op-Amp 2 |
| 7 | OUTPUT2 | Output of Op-Amp 2 |
| 8 | VCC | Positive Supply Voltage |
LM393 Differential Comparator features and specifications
- Dual Comparator in a single package
- Wide power supply Range
- Single supply – 2V to 36V
- Dual supply – ±1V to ±18V
- Drain Current of only 0.4mA
- Input Offset Voltage is ±3mV maximum
- Power Dissipation: 780mW
- Can Drive most of the TTL and MOS loads
- Output can be Isolated from System Ground
- Low Offset Voltage and current
LM393 Comparator Introduction
The LM393 IC can be considered as the equivalent comparator version of the most popular LM358 Op-Amp. While any Op-Amp can be made to work as a voltage comparator, the LM393 proves itself to be advantages by providing an open collector output making it suitable to drive loads.
The output transistor can drive loads upto 50V and 50mA which is suitable for driving most of the TTL, MOS and RTL loads. The transistor can also make the Load to be isolated from the system ground. So if you are looking for a Voltage comparator to drive loads of these specifications then this IC might be the right choice for you.
Applications
- Voltage Comparator circuits
- Can drive Relay, Lamp, Motor Etc
- Zero Crossing detector
- Peak voltage Detector
- High Voltage protection/Warning
- Oscillator circuits