Explore L298 pins, signal names, electrical functions and connection guidance for each package.
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Click a lead or use the arrow keys. Front view · leads down · tab is GND
Common emitter return of the two lower transistors in bridge A.
Connect a low-inductance current-sense resistor to power ground, or ground directly when sensing is not used.
Do not leave open. Sensing requires an external controller; this pin alone does not regulate current.
First power output of bridge A.
Connect to one motor lead; the other lead goes to OUT2.
Add external fast flyback diodes to the supply and ground rails.
Second power output of bridge A.
Connect to the other motor lead.
The motor is between OUT1 and OUT2, not between one output and ground.
Feeds the bridge output transistors.
Use a local 100 nF capacitor to GND and suitable bulk capacitance.
The example uses 12 V. Operating maximum is 46 V; allow room for inductive transients.
Controls OUT1 while ENA is HIGH.
Connect to a defined controller logic output.
HIGH enables bridge A; LOW disables both outputs.
Use a control output with a pull-down so the motor is disabled during reset.
Controls OUT2 while ENA is HIGH.
Connect to the second direction-control output.
Reference ground; the Multiwatt metal tab is connected to this node.
Join controller, supply and sense-resistor returns. Connect every PowerSO ground contact.
Supplies the internal control logic independently of VS.
Use 5 V with a local 100 nF bypass to GND.
Specified operating range is 4.5–7 V.
Controls OUT3 while ENB is HIGH.
Hold LOW in this one-motor example.
HIGH enables bridge B.
Hold LOW when bridge B is unused.
Controls OUT4 while ENB is HIGH.
Hold LOW in this example.
First output of bridge B.
Leave open when bridge B is unused; otherwise connect the second motor or winding.
Second output of bridge B.
Leave open when bridge B is unused.
Emitter return for bridge B.
Connect to GND in this example. Use a separate low-inductance shunt when sensing bridge B.
Unconnected contact present only on PowerSO-20.
Leave open.
Unconnected contact present only on PowerSO-20.
Leave open.
Additional ground contact on PowerSO-20; not an extra control signal.
Connect to the same ground plane as the other GND contacts.
Additional ground contact on PowerSO-20; not an extra control signal.
Connect to the same ground plane as the other GND contacts.
Additional ground contact on PowerSO-20; not an extra control signal.
Connect to the same ground plane as the other GND contacts.
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