LSI Computer Systems LS7082
The LS7082 is a monolithic CMOS silicon gate quadrature clock converter. These outputs can be interfaced directly with standard Up/Down counters for direction and position sensing of the encoder. 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.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
DESCRIPTION
: 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. INPUT/OUTPUTDESCRIPTION
: VDD (Pin 1) Supply Voltage positive terminal. INDX (Pin 2) Encoder Index pulses are applied to this input. RBIAS (Pin 3) Input for external component connection. A resistor connected between this input and V SS adjusts the output clock pulse width (Tow). For proper operation, the output clock pulse width must be less than or equal to the A,B pulse separation (TOW ≤ TPS). VSS (Pin 4) Supply Voltage negative terminal.