L293D Motor Driver

Name: L293D Motor Driver
Brand: Texas Instruments
Availability: InStock

L293D

Texas Instrumentsic motor driver

The L293D is a quadruple half-H driver that drives inductive loads such as relays, solenoids, and DC or bipolar stepper motors. It provides bidirectional currents up to 600 mA per channel at 4.5 to 36 V, with integrated flyback diodes.

Manufacturer datasheet

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In stock

Specifications

Operating Voltage: 4.5 to 36 V
Output Current Continuous: 600 mA
Output Current Peak: 1.2 A
Logic Supply Voltage: 4.5 to 7 V
Operating Temperature Range: 0 to 70 °C
Package Types: PDIP-16

Pinout

Pin	Name	Functions	Notes
1	1,2EN	GPIO	Enable for driver channels 1 and 2 (active high)
2	1A	GPIO	Driver 1 input, noninverting
3	1Y	GPIO	Driver 1 output
4	GROUND	GND	Device ground and heat sink pin
5	GROUND	GND	Device ground and heat sink pin
6	2Y	GPIO	Driver 2 output
7	2A	GPIO	Driver 2 input, noninverting
8	VCC2	POWER	Power supply for drivers, 4.5 V to 36 V
9	3,4EN	GPIO	Enable for driver channels 3 and 4 (active high)
10	3A	GPIO	Driver 3 input, noninverting
11	3Y	GPIO	Driver 3 output
12	GROUND	GND	Device ground and heat sink pin
13	GROUND	GND	Device ground and heat sink pin
14	4Y	GPIO	Driver 4 output
15	4A	GPIO	Driver 4 input, noninverting
16	VCC1	POWER	5-V supply for internal logic

Interactive pinout

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L293D

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Starter code

Community starter examples — minimal, unofficial, and provided to get you wiring fast. Verify against the manufacturer datasheet before relying on them.

Arduino (C++)

arduino

// L293D quad half-H bridge - drive one DC motor — community starter example
#if defined(ESP32)
  #define EN12 25
  #define A1   26
  #define A2   27
#else
  #define EN12 9   // Uno PWM pin -> 1,2EN
  #define A1   8   // -> 1A
  #define A2   7   // -> 2A
#endif

void setup() {
  pinMode(EN12, OUTPUT); pinMode(A1, OUTPUT); pinMode(A2, OUTPUT);
}

void loop() {
  digitalWrite(A1, HIGH); digitalWrite(A2, LOW);   // forward
  analogWrite(EN12, 200);                          // speed
  delay(2000);
  digitalWrite(A1, LOW);  digitalWrite(A2, HIGH);  // reverse
  delay(2000);
}

MicroPython

python

# L293D motor driver - one DC motor (ESP32) — community starter example
from machine import Pin, PWM
import time

en = PWM(Pin(25), freq=1000)   # 1,2EN
a1 = Pin(26, Pin.OUT)          # 1A
a2 = Pin(27, Pin.OUT)          # 2A

def drive(forward, duty):
    a1.value(1 if forward else 0)
    a2.value(0 if forward else 1)
    en.duty(duty)

while True:
    drive(True, 600);  time.sleep(2)
    drive(False, 600); time.sleep(2)

Wiring

Pin	Arduino Uno R3	ESP32 DevKitC (WROOM-32)	Notes
VCC1	+5V	3V3	Logic supply 4.5-7 V (pin 16)
VCC2	-	-	Motor supply up to 36 V (pin 8), separate from logic
GND	GND	GND	Pins 4,5,12,13; common ground + heatsinking
1,2EN	D9	GPIO25	PWM enable for channel 1/2
1A	D8	GPIO26
2A	D7	GPIO27
1Y/2Y	-	-	Outputs to the motor (pins 3 and 6)

Typical uses

Driving small DC motors or one stepper
Bidirectional control of 2 motors