The L293B and L293E are quad push-pull drivers capable of delivering output currents to 1A per channel. Each channel is controlled by a TTL- compatible logic input and each pair of drivers (a full bridge) is equipped with an inhibit input which turns off all four transistors. A separate supply in- put is provided for the logic so that it may be run off a lower voltage to reduce dissipation. Additionally, the L293E has external connection of sensing resistors, for switchmode control. The L293B and L293E are package in 16 and 20- pin plastic DIPs respectively ; both use the four center pins to conduct heat to the printed circuit board.
The L293B and L293E are quad push‑pull drivers capable of delivering up to 1 A continuous output current per channel, with a non‑repetitive peak of 2 A. Each channel is controlled by a TTL‑compatible logic input, and an inhibit input can turn off all four transistors simultaneously. A separate logic supply allows lower‑voltage operation to reduce dissipation.
The document includes absolute maximum ratings, thermal and electrical characteristics, pin diagrams, block diagrams, and application examples such as DC motor control and stepping‑motor driving. Mechanical dimensions for the DIP16 and POWERDIP packages are also provided.
| Continuous Output Current per Channel | 1 A |
|---|---|
| Peak Output Current (non‑repetitive) | 2 A |
| Logic Supply Voltage (Veg) | 4.5 V – 36 V |
| Thermal Resistance Junction‑Case | 14 °C/W |
| Thermal Resistance Junction‑Ambient | 80 °C/W |
| Input Low Voltage (ViL) | -0.3 V – 1.5 V |
| Input High Voltage (ViH) | 2.3 V – 7 V |
Each channel can deliver up to 1 A of continuous output current.
Yes, an inhibit input can turn off all four transistors simultaneously.