DESCRIPTION:

The LS7083N and LS7084N are CMOS quadrature clock converters. Quadrature clocks derived from optical or magnetic encoders, when applied to the A and B inputs of the LS7083N or LS7084N, are converted to strings of Up Clocks and Down Clocks (LS7083N) or to a Clock and an Up/Down direction control (LS7084N). These outputs can be interfaced directly with standard Up/Down counters for direction and position sensing of the encoder.

FEATURES:

• x1 and x4 mode selection

• Up to 16MHz output clock frequency

• Programmable output clock pulse width

• On-chip filtering of inputs for optical or magnetic encoder applications.

• TTL and CMOS compatible I/Os

• +3V to +12V operation (VDD - VSS)

• LS7083N, LS7084N (DIP); LS7083NS, LS7084NS (SOIC) - See Figure 1

Applications:

• Interface incremental encoders to Up / Down Counters (See Figure 6A and Figure 6B)

• Interface rotary encoders to Digital Potentiometers (See Figure 7)