LS7183N

Overview

The LS7183N is a CMOS quadrature clock converter manufactured by LSI Computer Systems. It converts quadrature clock signals from optical or magnetic encoders into Up Clock and Down Clock strings for direct interfacing with standard up/down counters. The device supports x1, x2, and x4 resolution modes. It operates on a single +3V to +5.5V supply voltage. The output pulse width is programmable within a range of 200ns to 140µs. The component features TTL and low voltage CMOS compatible I/Os.

Feature Summary

• Converts quadrature encoder inputs into distinct up and down clock outputs
• Supports multiple resolution modes including x1, x2, and x4
• Features programmable output pulse width with excellent regulation
• Compatible with both TTL and low voltage CMOS logic levels

Applications

• Interface incremental encoders to up/down counters
• Interface rotary encoders to digital potentiometers

Procurement Notes

Verify the manufacturer designation as LSI Computer Systems rather than generic LSI/CSI. Confirm the package type corresponds to the DIP variant specified in the datasheet. Ensure the part number suffix matches the required pin configuration. Cross-reference the specific revision level if available in official documentation.

Selection Notes

Select this component when interfacing incremental encoders requiring conversion to separate direction and count pulses. Verify that the input signal frequencies fall within the operational limits of the CMOS technology. Ensure the system voltage aligns with the +3V to +5.5V operating range. Consider the programmable pulse width requirements for downstream counter compatibility.

Part Context

The LS7183 is part of a family of quadrature clock converters that includes the LS7184. While the LS7183 provides separate Up and Down clock outputs, the LS7184 generates a single clock and an up/down direction control signal. Both devices share similar input handling capabilities for optical and magnetic encoders.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.