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The STSPIN820 is very similar to the classic Pololu A4988, widely used in 3D printers and CNC machines, and shares the same size and pin configuration as a direct replacement. One of its main differences is that it supports a much wider subdivision of steps, up to 256 microsteps for smoother, quieter movements.
Simple pass and direction control interface.
Eight different step resolutions down to 256 microsteps: full-step, half-step, 1/4-step, 1/8-step, 1/16-step, 1/32-step, 1/128-step, and 1/256-step
Adjustable Current control allows you to set the maximum Current output, which lets you use voltages above your stepper Motor's rated voltage to achieve higher step rates.
Motor supply voltage: 7 V to 45 V (for a lower voltage alternative, consider STSPIN220, which operates from 1.8 V to 10 V).
It can deliver up to approximately 0.9 A per phase continuously without a heat sink or forced air flow (up to 1.5 A peak).
Can interface directly with 3.3 V and 5 V systems
Over-temperature thermal shutdown, over-current shutdown, and short circuit protection.
4-layer, 2 oz copper PCB for improved heat dissipation.
Exposed solderable ground pad below the driver IC on the bottom of the PCB.
Module size, pinout and interface correspond to A4988 stepper Motor driver carrier in most respects.
Motor driver: STSPIN820
Minimum operating voltage: 7 V
Maximum operating voltage: 45 V
Continuous Current per phase: 0.9 A
Maximum Current per phase: 1.5 A
Minimum logic voltage: 2 V
Maximum logic voltage: 5.5 V
Microstep resolutions: full, 1/2, 1/4, 1/8, 1/16, 1/32, 1/128, 1/256
Current limit control: potentiometer