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IC Pinouts / L293D

L293D Pinout

L293D Motor Driver (Dual H-Bridge) · Dual H-bridge motor driver; drives 2 DC motors or 1 stepper; includes freewheeling diodes.

DIP-16 Driver 16 pins No backend · 100% client-side
1,2EN(EN12) 1
IN1(1A) 2
OUT1(1Y) 3
GND 4
GND 5
OUT2(2Y) 6
IN2(2A) 7
VCC2(Vs) 8
L293D DIP-16
16 VCC1(Vss)
15 IN4(4A)
14 OUT4(4Y)
13 GND
12 GND
11 OUT3(3Y)
10 IN3(3A)
9 3,4EN(EN34)
PowerGNDInputOutputI/OControl
PinNameTypeFunction
1 1,2EN · EN12 Control Enable 1/2 (active-high; can drive with PWM for speed control)
2 IN1 · 1A Input Input 1
3 OUT1 · 1Y Output Output 1 (to motor)
4 GND GND Ground / heatsink
5 GND GND Ground / heatsink
6 OUT2 · 2Y Output Output 2 (to motor)
7 IN2 · 2A Input Input 2
8 VCC2 · Vs Power Motor supply (4.5–36V)
9 3,4EN · EN34 Control Enable 3/4 (active-high)
10 IN3 · 3A Input Input 3
11 OUT3 · 3Y Output Output 3 (to motor)
12 GND GND Ground / heatsink
13 GND GND Ground / heatsink
14 OUT4 · 4Y Output Output 4 (to motor)
15 IN4 · 4A Input Input 4
16 VCC1 · Vss Power Logic supply +5V
How to · reading it

How to read the L293D pinout

  1. 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.

  2. 02

    Count counter-clockwise

    Count counter-clockwise from pin 1: go down the left side first, then up the right side from the bottom.

  3. 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.

FAQ

Frequently asked questions

What's the difference between the two supply pins?

VCC1 (pin 16) supplies 5V to the chip logic; VCC2 (pin 8) powers the motor (4.5–36V). They must share a common ground. Separating logic and motor supplies makes it easy to drive higher-voltage motors.

How do I control a DC motor in both directions?

Use the IN1/IN2 pair: IN1=1, IN2=0 runs forward, the reverse runs backward, equal values brake/stop; pull EN high to enable (PWM for speed control).

Why is heat / drive capability limited?

The L293D handles about 600mA per channel (1.2A peak), and being a BJT output it has a voltage drop and noticeable heating; for high current / efficiency use a MOSFET driver such as the L298N or DRV8833.

Data source

Pinout data comes from ST/TI L293D datasheet (standard DIP-16 numbering). Refer to the actual device datasheet as authoritative for the pinout.

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