LS7082

Features:

• x1, x2 and x4 mode selection
• Up to 16 MHz output clock frequency
• INDEX input and output
• UP/DOWN indicator output
• Programmable output clock pulse width
• On-chip filtering of inputs for optical or magnetic encoder applications.
• TTL and CMOS compatible I/Os
• +4.5V to +10.0V operation (VDD-VSS)
• LS7082 (DIP); LS7082-S (SOIC ) - See Figure 1


Pinout




Specifications

PARAMETER	SYMBOL	VALUE	UNITS
DC Supply Voltage	VDD - VSS	11.0	V
Voltage at any input	VIN	VSS -.3 to VDD +.3	V
Operating temperature	TA	0 to +70
Storage temperature	TSTG	-55 to +150

Description

·The LS7082 is a monolithic CMOS silicon gate quadrature clock converter. Quadrature clocks derived from optical or magnetic encoders, when applied to the A and B Inputs of the LS7082, are converted to strings of Up Clocks and Down Clocks. Pulses derived from the Index Track of an encoder, when applied to the INDX input, produce absolute position reference pulses which are synchronized to the Up Clocks and Down Clocks. These outputs can be interfaced directly with standard Up/Down counters for direction and position sensing of the encoder.