LM35 Pinout
LM35 Temperature Sensor · Analog temperature sensor, 10 mV/°C, no calibration needed — reads 0°C up (basic hookup).
TO-92 flat (labelled) face toward you, pins down: left to right +Vs, Vout, GND. Output is 10 mV per °C (e.g. 250 mV = 25°C). The basic single-supply circuit reads 0°C and up.
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | +Vs · VCC | Power | Supply + (4–30V) |
| 2 | Vout | Output | Analog output, 10 mV/°C |
| 3 | GND | GND | Ground |
How to read the LM35 pinout
- 01
Find pin 1
One end of the chip has a half-circle notch or a dot; with the notch facing up, the top-left pin is pin 1.
- 02
Count counter-clockwise
Count counter-clockwise from pin 1: go down the left side first, then up the right side from the bottom.
- 03
Check the table below
Look up each pin's function by number in the table below; power/ground are color-coded, and alternate-function signals are in parentheses.
Frequently asked questions
What is the LM35 pin order?
Flat (printed) face toward you, pins pointing down: left to right +Vs, Vout, GND. Always confirm against the datasheet for your package variant.
How do I convert the output to temperature?
Temperature (°C) = Vout / 10 mV. So 0.25V → 25°C. Feed Vout into an ADC and divide the millivolts by 10.
Pinout data comes from TI LM35 datasheet (standard TO-92 numbering). Refer to the actual device datasheet as authoritative for the pinout.