The Toshiba TC78H620FNG,EL is a fully integrated stepper motor driver that packs both the control logic and DMOS power stage into a single 16-SSOP package. It drives one unipolar stepper motor at up to 1A per winding, with the supply rail for the motor side spanning 2.5V to 15V while the logic side runs from 2.7V to 5.5V. The parallel interface gives you direct step and direction control, with step resolution options of full-step and half-step.
The 1A per-channel rating is the continuous output current limit. For a typical NEMA 14 or NEMA 17 unipolar stepper with a phase resistance of a few ohms, that 1A at 12V motor supply is enough for light positioning tasks — think filament feeders, small XY tables, or pan-tilt mechanisms. The half-bridge configuration (four outputs) means each winding gets its own H-bridge, so you get bidirectional current control. If your motor draws more than 1A, this driver isn't the right fit; you'd be looking at a higher-current part like the TB6600HG (4.5A, though that's a through-hole bipolar driver with microstepping).
Active and available — no obsolescence worry
That means Toshiba is still manufacturing it, and there's no last-time-buy or end-of-life notice to plan around.