1 Features

1• 1-A Output-Current Capability Per Driver

• Applications Include Half-H and Full-H Solenoid

Drivers and Motor Drivers

• Designed for Positive-Supply Applications

• Wide Supply-Voltage Range of 4.5 V to 36 V positive•

TTL- and CMOS-Compatible High-Impedance

Diode-Clamped Inputs

• Separate Input-Logic Supply

• Thermal Shutdown

• Internal ESD Protection

• Input Hysteresis Improves Noise Immunity

• 3-State Outputs

• Minimized Power Dissipation

• Sink/Source Interlock Circuitry Prevents highSimultaneous

Conduction

• No Output Glitch During Power Up or Power

Down

• Improved Functional Replacement for the SGS

L293

2 Applications

• Stepper Motor Drivers

• DC Motor Drivers

• Latching Relay Drivers

3 Description

The SN754410 is a quadruple high-current half-H

driver designed to provide bidirectional drive currents up to 1 A at voltages from 4.5 V to 36 V. The device

is designed to drive inductive loads such as relays,

solenoids, DC and bipolar stepping motors, as well as

other high-current/high-voltage loads in positive•

supply applications.

All inputs are compatible with TTL-and low-level

CMOS logic. Each output (Y) is a complete totempole

driver with a Darlington transistor sink and a

pseudo-Darlington source. Drivers are enabled in

pairs with drivers 1 and 2 enabled by 1,2EN and

drivers 3 and 4 enabled by 3,4EN. When an enable

input is high, the associated drivers are enabled and their outputs become active and in phase with their

inputs. When the enable input is low, those drivers

are disabled and their outputs are off and in a highSimultaneous

impedance state. With the proper data inputs, each

pair of drivers form a full-H (or bridge) reversible drive

suitable for solenoid or motor applications.

A separate supply voltage (VCC1) is provided for the

logic input circuits to minimize device power dissipation. Supply voltage VCC2 is used for the output

circuits.

The SN754410 is designed for operation from −40°C to 85°C.