LM339 Reference Tables, Pins & Specifications

Pin reference

Signal names, electrical functions and connection guidance

PDIP-14

Physical pin numbers14 pins

Scroll within the table to see all columns and rows.

LM339 pin functions and connections
Signal	Type	Function & connection
OUT1	Open-collector output	Sinks current when IN+ is below IN−. Releases when IN+ is above IN−. Connection guidance Add a 10 kΩ pull-up to +5 V and connect a high-impedance logic input. An external pull-up is required for a defined HIGH.
OUT2	Open-collector output	Sinks current when IN+ is below IN−. Releases when IN+ is above IN−. Connection guidance Leave open when unused. An external pull-up is required for a defined HIGH.
VCC	Positive supply	Shared positive supply for all four comparators. Connection guidance Use +5 V with 100 nF bypass to pin 12. Classic LM339: 2–30 V operating range.
IN2−	Inverting input	Negative input for the comparator whose output is pin 2. Connection guidance Connect to the 2.0 V reference when unused.
IN2+	Non-inverting input	Positive input for the comparator whose output is pin 2. Connection guidance Connect to GND when unused. Stay within the common-mode range.
IN1−	Inverting input	Negative input for the comparator whose output is pin 1. Connection guidance Connect to the 2.0 V reference.
IN1+	Non-inverting input	Positive input for the comparator whose output is pin 1. Connection guidance Connect to VIN, the adjustable signal. Stay within the common-mode range.
IN3−	Inverting input	Negative input for the comparator whose output is pin 14. Connection guidance Connect to the 2.0 V reference when unused.
IN3+	Non-inverting input	Positive input for the comparator whose output is pin 14. Connection guidance Connect to GND when unused. Stay within the common-mode range.
IN4−	Inverting input	Negative input for the comparator whose output is pin 13. Connection guidance Connect to the 2.0 V reference when unused.
IN4+	Non-inverting input	Positive input for the comparator whose output is pin 13. Connection guidance Connect to GND when unused. Stay within the common-mode range.
GND	Supply return	Shared negative supply / ground. Connection guidance Connect to signal and supply returns.
OUT4	Open-collector output	Sinks current when IN+ is below IN−. Releases when IN+ is above IN−. Connection guidance Leave open when unused. An external pull-up is required for a defined HIGH.
OUT3	Open-collector output	Sinks current when IN+ is below IN−. Releases when IN+ is above IN−. Connection guidance Leave open when unused. An external pull-up is required for a defined HIGH.

Operating conditions

Classic LM339 · not LM339B

Manufacturer-referenced values5 parameters

Scroll within the table to see all columns and rows.

Parameter	Value	Conditions / notes
Supply	2–30 V	Single supply
Ambient temperature	0 to 70°C	LM339 grade
Input common-mode range	0 to VCC − 1.5 V	At 25°C
Input common-mode range	0 to VCC − 2 V	Across the full temperature range
Total supply current	0.8 mA typical; 2 mA maximum	Four channels; VO = 2.5 V; no load; 25°C

B variants have different supply, offset and temperature limits.

Electrical characteristics

5 V unless stated

Manufacturer-referenced values8 parameters

Scroll within the table to see all columns and rows.

Parameter	Value	Conditions / notes
Input offset	2 mV typical; 5 mV maximum	At 25°C; specified common-mode condition
Input offset across temperature	9 mV maximum	Classic LM339
Input bias-current magnitude	25 nA typical; 250 nA maximum	At 25°C
Input bias-current magnitude	400 nA maximum	Across temperature
LOW output voltage	150 mV typical; 400 mV maximum	4 mA sink; −1 V differential; 25°C
LOW output across temperature	700 mV maximum	4 mA sink
Off-state leakage	0.1 nA typical; 50 nA maximum	VO = 5 V; 25°C
Typical response time	1.3 µs	100 mV step; 5 mV overdrive; 5.1 kΩ pull-up; 15 pF

Small-signal timing and output voltage depend on overdrive, pull-up, load and temperature.

Comparator channel connections

Physical pin numbers

Manufacturer-referenced values5 parameters

Scroll within the table to see all columns and rows.

Parameter	Value	Conditions / notes
OUT1 pin1	IN+7 / IN−6	Used threshold channel
OUT2 pin2	IN+5 / IN−4	Second independent comparator
OUT3 pin14	IN+9 / IN−8	Third independent comparator
OUT4 pin13	IN+11 / IN−10	Fourth independent comparator
Shared supply	VCC3 / GND12	Do not confuse this map with LM324

Some manufacturers swap channel 1 and 2 names. The physical input/output groupings above are unchanged.

Threshold detector

5 V · 2 V reference

Manufacturer-referenced values8 parameters

Scroll within the table to see all columns and rows.

Parameter	Value	Conditions / notes
Reference divider	15 kΩ above, 10 kΩ below	5 × 10 / (15 + 10) = 2.0 V nominal
Signal input	VIN → pin7	Use 0–3 V for the reviewed full-temperature range
Reference input	VREF → pin6	Same reference also biases unused negative inputs
Pull-up	10 kΩ from output1 to +5 V	Required for logic HIGH
Supply bypass	100 nF from3 to12	Close to the package
Unused comparators	Positive inputs to GND; negative inputs to VREF	Leave their outputs open
Below reference	Output LOW	Transistor sinks pull-up current
Above reference	Output HIGH through pull-up	Transistor is off

Divider accuracy depends on resistor tolerances and input bias. The explorer uses a chosen reference value.

Package and stress limits

LM339N · PDIP-14

Manufacturer-referenced values5 parameters

Scroll within the table to see all columns and rows.

Parameter	Value	Conditions / notes
Lead pitch	2.54 mm	Through-hole; top view
Supply absolute maximum	36 V	Classic non-B stress limit
Output absolute maximum	36 V / 20 mA	Stress limits; design within operating conditions
Storage temperature	−65 to +150°C	Unpowered
Input/output distinction	Outputs can sink; inputs cannot power a load	Use a pull-up sized for the connected logic

Output pull-up voltage, input range and supply voltage are separate design constraints.