The Toshiba serial controlled bipolar stepping motor driver is two-phase IC with a built-in clock-in decoder. This monolithic IC is fabricated with the BiCD process, and has output rating of 50 V/5.0 A.

PWM controlled constant-current drive
Low on-resistance (High + Low side = 0.25 Ω (typ.))
MOSFET output stage
Allows full, half, quarter, 1/8, 1/16, 1/32, 1/64, 1/128 step operation.
High efficiency motor current control mechanism (ADMD: Advanced Dynamic Mixed Decay)
Built-in Anti-stall architecture (AGC: Active Gain Control)
Built-in Sense resistor less current control architecture (ACDS: Advanced Current Detection System)
High voltage and current
Multi error detect functions (Thermal shutdown (TSD), Over current (ISD), Power-on-reset (POR), motor load open(OPD)).
Error detection (TSD/ISD/OPD) flag output function
Built-in VCC regulator for internal circuit
Chopping frequency of a motor can be adjusted by external resistance and capacitor
Small package with thermal pad