L297/1 DIP Stepper Motor Controller IC, 20-Pin

The L297/1 Stepper Motor Controller IC is a dedicated integrated circuit designed to simplify the control of two-phase bipolar and four-phase unipolar stepper motors in microcomputer-based applications. It generates the necessary four-phase drive signals internally, significantly reducing the programming and processing burden on the host microcontroller. This chip only requires simple clock, direction, and mode input signals to operate.

It supports multiple drive modes including half-step, normal (full-step), and wave drive, offering flexibility for different torque and resolution requirements. An integrated PWM (Pulse Width Modulation) chopper circuit allows for efficient switch-mode control of the winding current, enabling precise regulation and programmable load current with minimal external components.

Key control features include clockwise/anticlockwise direction control, a reset input, a home output signal, and an enable input. Its robust design is suited for demanding environments, operating across a wide temperature range from -40°C to 150°C. Supplied in a through-hole DIP (Dual In-line Package), it is ideal for prototyping and industrial control systems where reliability is critical.

Primary Applications

This controller is widely used across industries requiring precise motion control. Its common applications include automation and process control systems, automotive electronics, aerospace instrumentation, defence and military equipment, and general motor drive control solutions.