STMicroelectronics L293E Manuals

STMicroelectronics L293B L293E Quad Push-Pull Driver Datasheet

This datasheet from STMicroelectronics describes the L293B and L293E quad push-pull drivers, which deliver output currents up to 1 A per channel with a non-repetitive peak of 2 A per channel. Each channel is controlled by a TTL-compatible logic input, and each pair of drivers (a full bridge) has an inhibit input that turns off all four transistors. A separate logic supply input lets the logic run at a lower voltage to reduce dissipation. The L293E also provides external connection of sensing resistors for switchmode control.

The L293B is supplied in a 16-pin plastic DIP and the L293E in a 20-pin Powerdip, both using the four center pins to conduct heat to the printed circuit board. The document gives pin connections, block and schematic diagrams, absolute maximum ratings, thermal data, electrical characteristics and the truth table, followed by application figures for DC motor control, bidirectional DC motor control, bipolar stepping motor control and a stepping motor driver with phase current control and short circuit protection. Mounting instructions explain how to lower the junction-to-ambient thermal resistance by soldering the GND pins to a copper area or an external heatsink, and outline drawings give the package dimensions.