LS7184N-S

Overview

The LS7184N-S is a CMOS quadrature clock converter manufactured by LSI Computer Systems. It interfaces with incremental encoders to convert quadrature clocks into a single clock signal and an Up/Down direction control output. The device operates within a voltage range of +3V to +5.5V and features TTL and low voltage CMOS compatible I/Os. It supports x1, x2, and x4 resolution modes and includes programmable output pulse width capabilities ranging from 200ns to 140µs.

Feature Summary

• Converts quadrature encoder signals into a clock and direction control output
• Supports multiple resolution modes including x1, x2, and x4
• Features programmable output pulse width for flexible timing control

Applications

• Interface incremental encoders to Up/Down counters
• Interface rotary encoders to digital potentiometers

Procurement Notes

Verify the specific suffix 'S' indicates the SOIC package variant as documented in official LSI Computer Systems materials. Confirm that the LS7184N-S designation aligns with the manufacturer's current naming conventions for this quadrature converter. Ensure compatibility with system voltage requirements between +3V and +5.5V before procurement.

Selection Notes

Select the LS7184N-S when a clock and direction output is required rather than separate up/down pulses provided by the LS7183. Consider the SOIC package format associated with the 'S' suffix for surface mount applications. Verify that the input interface matches standard optical or magnetic encoder outputs requiring conversion to digital logic levels.

Part Context

The LS7184N-S belongs to the LS7183/LS7184 family of quadrature clock converters from LSI Computer Systems. While the LS7183 provides separate Up and Down clock outputs, the LS7184 variant specifically generates a combined clock and direction signal. This distinction allows designers to choose the output format that best suits their downstream counter or control logic architecture.

Replacement Considerations

The LS7183 serves as a functional alternative if separate Up/Down clock outputs are preferred over a direction control signal. Both devices share similar electrical characteristics and encoder interface capabilities within the same product family.