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ELM313

ELM Electronics
Part Number ELM313
Manufacturer ELM Electronics
Description Stepper Motor Controller
Published Aug 1, 2008
Detailed Description ELM313 Stepper Motor Controller Description The ELM313 is an interface circuit for use between high speed logic and fou...
Datasheet PDF File ELM313 PDF File

ELM313
ELM313

Overview
ELM313 Stepper Motor Controller Description The ELM313 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 the full-step two phase mode of operation.
This mode provides sequential phase control output signals for driving a variety of motors.
In this mode, two phases are always energized, providing several advantages over single phase full (wave) stepping, at the cost of higher power consumption by the motor.
The ELM313 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 (two phase) 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 ELM313DSB Elm Electronics – Circuits for the Hobbyist < http://www.
elmelectronics.
com/ > 1 of 5 ELM313 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 windin...


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