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ELM311

ELM Electronics
Part Number ELM311
Manufacturer ELM Electronics
Description Stepper Motor Controller
Published Apr 14, 2024
Detailed Description ELM311 Stepper Motor Controller Description The ELM311 is an interface circuit for use between high speed logic and fou...
Datasheet PDF File ELM311 PDF File

ELM311
ELM311


Overview
ELM311 Stepper Motor Controller Description The ELM311 is an interface circuit for use between high speed logic and four phase stepper motor driver circuits.
All of the logic required to provide stepping in two directions is contained in this one 8 pin package.
This circuit supports only one mode of operation, the full-step, or single phase wave mode, as it is sometimes called.
This mode provides sequential single phase output signals for driving a variety of motors.
For dual mode operation, the ELM310 should be considered.
The ELM311 can be controlled by a wide variety of circuits, due to its fully static operation.
In addition to using high speed microprocessor control, suitably debounced mechanical switches or continuously running oscillator circuits could also be used.
Features • Low power CMOS design - typically 1mA at 5V • Wide supply range - 3.
0 to 5.
5 volt operation • Two inputs control Full step motion • No external timing components • Completely static operation - will maintain a step position indefinitely • High current drive outputs - up to 25 mA • Very high speed - up to 25000 steps per second Connection Diagram PDIP and SOIC (top view) Applications • Stepper motor drive logic • Process sequencing • Sequential left/right LED driver VDD 1 A2 Dir 3 Step 4 8 VSS 7B 6C 5D Block Diagram 20msec Startup Timer Inhibit Dir 3 Step 4 CW Step 2A 7B 6C 5D ELM311DSB Elm Electronics – Circuits for the Hobbyist < http://www.
elmelectronics.
com/ > 1 of 5 ELM311 Pin Descriptions VDD (pin 1) This pin is the positive supply pin, and should always be the most positive point in the circuit.
Internal circuitry connected to this pin is used to provide power on reset of the microprocessor, so an external reset signal is not required.
Refer to the Electrical Characteristics section for further information.
A (pin 2) This is the active high output drive signal for the (first) phase A winding.
Normally, this output would be the first to be energized when starting a ...


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