L293D Quadruple Half-H Drivers with Internal Flyback Diodes
Quadruple Half-H motor driver IC with internal flyback protection diodes, providing four independently controlled half-bridge outputs rated 600mA each. The D suffix indicates built-in suppression diodes, no external diodes needed for inductive loads.
Aliase:L293D, Motor Driver IC, Dual H-Bridge
DIP-16 Top View
16 Pins
Pin-Tabelle16
| Pin | Signal / Name | Typ | Alternative Funktionen |
|---|---|---|---|
| 1 | EN1,2 | Digital | Channel 1 & 2 Enable (Active High — HIGH enables outputs 1Y/2Y; PWM here controls motor speed) |
| 2 | 1A | Digital | Channel 1 Logic Input (HIGH: 1Y = HIGH; LOW: 1Y = LOW when EN1,2 is HIGH) |
| 3 | 1Y | Digital | Channel 1 Output (connect to motor terminal A; state follows 1A when EN1,2 is HIGH) |
| 4 | GND | Ground | Ground / Heat Sink (solder pad pairs 4,5 and 12,13 to ground plane or copper pour) |
| 5 | GND | Ground | Ground / Heat Sink |
| 6 | 2Y | Digital | Channel 2 Output (connect to motor terminal B; state follows 2A when EN1,2 is HIGH) |
| 7 | 2A | Digital | Channel 2 Logic Input (HIGH: 2Y = HIGH; LOW: 2Y = LOW when EN1,2 is HIGH) |
| 8 | VCC2 | Power | Motor Power Supply (+4.5V to +36V; powers channels 1–4 output stages) |
| 9 | EN3,4 | Digital | Channel 3 & 4 Enable (Active High — HIGH enables outputs 3Y/4Y; PWM here controls motor speed) |
| 10 | 3A | Digital | Channel 3 Logic Input (HIGH: 3Y = HIGH; LOW: 3Y = LOW when EN3,4 is HIGH) |
| 11 | 3Y | Digital | Channel 3 Output (connect to motor terminal A; state follows 3A when EN3,4 is HIGH) |
| 12 | GND | Ground | Ground / Heat Sink |
| 13 | GND | Ground | Ground / Heat Sink |
| 14 | 4Y | Digital | Channel 4 Output (connect to motor terminal B; state follows 4A when EN3,4 is HIGH) |
| 15 | 4A | Digital | Channel 4 Logic Input (HIGH: 4Y = HIGH; LOW: 4Y = LOW when EN3,4 is HIGH) |
| 16 | VCC1 | Power | Logic Power Supply (+5V; powers internal logic and input buffers; separate from motor supply VCC2) |