ELM313

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


Application

• Stepper motor drive logic
• Process sequencing
• Sequential left/right LED driver


Specifications

Storage Temperature....................... -65°C to +150°C
Ambient Temperature with
Power Applied.................................... -40°C to +85°C
Voltage on VDD with respect to VSS............ 0 to +7.5V
Voltage on any other pin with
respect to VSS........................... -0.6V to (VDD + 0.6V)


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 toprovide stepping in two directions is contained in thisone 8 pin package.

This circuit ELM313 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, suitablydebounced mechanical switches or continuously running oscillator circuits could also be used.