Allegro

A3972: Dual DMOS Full-Bridge Microstepping PWM Motor Driver
A3985: Digitally Programmable Dual Full-Bridge MOSFET Driver
A3992: DMOS Dual Full-Bridge Microstepping PWM Motor Driver
A3998: Dual DMOS Full Bridge Motor Driver With Serial Port Control and Dual Regulators
A4979: Microstepping Programmable Stepper Motor Driver With Stall Detect and Short Circuit Protection

Epson

Stylus C41, C42, C43, C44 repair manual