BETARecommended supply2–30 V · classic LM393
Dual voltage comparator
LM393 Specifications
Review LM393 electrical specifications, operating conditions and package details.
Package view
Key specifications
An open-collector output needs a pull-up resistor. It sinks current instead of sourcing a HIGH level.
Independent channels2 Open-collector outputs
Ambient range0–70 °C
Typical response1.3 µs · specified small-signal test
Package details
LM393P · PDIP-8
| Property | Details |
|---|---|
| Manufacturer | Texas Instruments |
| Part number | LM393P |
| Package | PDIP-8 |
| Connections | 8 pins |
| Mounting | Through-hole |
| Lead pitch | 2.54 mm |
| Package code | dip |
| Thermal reference | Board and package dependent; see manufacturer data |
Operating conditions
Classic LM393 · not the B revision
Manufacturer specifications 5 parameters
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| Parameter | Value | Conditions / notes |
|---|---|---|
| Supply | 2–30 V | Single supply; example uses 5 V |
| Ambient temperature | 0 to +70°C | LM393 / LM393A grade |
| Input voltage range | 0 to VCC − 2 V | Recommended full-temperature range |
| Example input range | 0–3 V | At VCC = 5 V |
| Output HIGH | External pull-up required | Output transistor is off |
No specifications match. Try a parameter name or a unit.
TI SLCS005AH recommended conditions for the classic device.
Electrical characteristics
5 V supply unless stated
Manufacturer specifications 7 parameters
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| Parameter | Value | Conditions / notes |
|---|---|---|
| Input offset voltage | 2 mV typical; 5 mV maximum | 25°C; VCC = 5–30 V |
| Offset over temperature | 9 mV maximum | 0–70°C |
| Input bias current | 25 nA typical; 250 nA maximum | Magnitude at 25°C |
| Output LOW voltage | 0.13 V typical; 0.40 V maximum | 4 mA sink; VID = −1 V; 25°C |
| Output LOW over temperature | 0.70 V maximum | Same 4 mA test; full range |
| Total supply current | 0.45 mA typical; 1 mA maximum | 5 V; unloaded; 25°C |
| Response time | 1.3 µs typical | 100 mV step; 5 mV overdrive; 5.1 kΩ pull-up; 15 pF |
No specifications match. Try a parameter name or a unit.
Response time and typical LOW voltage are not guaranteed operating limits.
Output behavior
Voltage difference and pull-up
Manufacturer specifications 5 parameters
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| Parameter | Value | Conditions / notes |
|---|---|---|
| IN+ < IN− | Output transistor ON | LOW; current flows through the pull-up |
| IN+ > IN− | Output transistor OFF | HIGH only with a pull-up or another defined load |
| Inputs nearly equal | Offset and noise matter | Output state is not guaranteed at exact equality |
| No pull-up; transistor OFF | Floating output | Do not call this HIGH |
| Noisy threshold | May switch repeatedly | Use calculated hysteresis for a stable transition |
No specifications match. Try a parameter name or a unit.
This example has no positive-feedback hysteresis.
Threshold detector values
Nominal 5 V example
Manufacturer specifications 6 parameters
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| Parameter | Value | Conditions / notes |
|---|---|---|
| Upper reference resistor | 30 kΩ | From +5 V to VREF |
| Lower reference resistor | 20 kΩ | From VREF to ground |
| Reference voltage | 2.00 V | 5 × 20 / (30 + 20) |
| Output pull-up | 10 kΩ | From +5 V to OUT1 |
| Supply bypass | 100 nF | Close to pins 8 and 4 |
| Unused comparator | IN2+ to GND; IN2− to VREF | OUT2 unconnected |
No specifications match. Try a parameter name or a unit.
Divider tolerance, input bias and supply error affect the threshold.
Package and stress limits
LM393P · PDIP-8
Manufacturer specifications 6 parameters
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| Parameter | Value | Conditions / notes |
|---|---|---|
| Lead pitch | 2.54 mm | Through-hole; top view |
| Supply absolute maximum | 36 V | Stress rating; recommended maximum is 30 V |
| Output voltage absolute maximum | −0.3 to +36 V | Observe the load and current limits |
| Output current absolute maximum | 20 mA | Not a recommended design current |
| Junction temperature limit | 150°C | Absolute maximum |
| Storage temperature | −65 to +150°C | Unpowered storage |
No specifications match. Try a parameter name or a unit.
Use the manufacturer thermal data for the actual board and package.
Connections by function
Select a pin for its function, connection guidance and electrical notes.