LM393P and LM393D are dual differential input voltage comparators designed to operate from a single power supply over a wide range of voltages. The common mode input voltage range includes ground and the devices have open collector outputs.
Although comparators and operational amplifiers are superficially similar devices their operation in practical applications is very different. Op amps are intended for linear operation accompanied by suitable feedback whereas comparators are tailored for rapid switching and generally operated in open-loop mode. Dedicated voltage comparators have significantly shorter propagation delays and are capable of faster response times under saturated conditions. Most comparators are also more tolerant of high differential input voltages and many have open-collector outputs allowing parallel operation with other devices.
| Attribute | Value |
| Comparator Type | General Purpose |
| Mounting Type | Through Hole (LM393P) or SMD (LM393D) |
| Package Type | DIP-8 (LM393P) or SOP-8 (LM393D) |
| Power Supply Type | Dual, Single |
| Output Type | Open Collector |
| Number of Channels per Chip | 2 |
| Typical Response Time | 1.3µs |
| Pin Count | 8 |
| Typical Single Supply Voltage | 3 → 28 V |
| Dimensions | 9.81 x 6.35 x 4.57mm (LM393P) |
| Length | 9.81mm (LM393P) |
| Width | 6.35mm (LM393P) |
| Height | 4.57mm (LM393P) |
| Typical Voltage Gain | 106.02 dB |
| Maximum Operating Temperature | +70 °C |
| Typical Dual Supply Voltage | ±12 V, ±15 V, ±3 V, ±5 V, ±9 V |
| Minimum Operating Temperature | 0 °C |