Description
The HCTL-20XX-XX is CMOS ICs that perform the quadrature decoder, counter, and bus interface function. The HCTL-20XX-XX is designed to improve system performance in digital closed loop motion control systems and digital data input systems. It does this by shifting time intensive quadrature decoder functions to a cost effective hardware solution. The HCTL-20XX-XX consists of a quadrature decoder logic, a binary up/down state counter, and an 8-bit bus interface. The use of Schmitt-triggered CMOS inputs and input noise flters allows reliable operation in noisy environments. The HCTL-20XX-XX contains 32-bit counter and provides LSTLL compatible tri-state output buffers. Operation is specifed for a temperature range from -40 to +100°C at clock frequencies up to 33MHz.
The HCTL-2032 and HCTL-2032-SC have dual-axis capability and index channel support. Both devices can be programmed as 4x/2x/1x count mode. The HCTL-2032 and HCTL2032-SC also provides quadrature decoder output signals and cascade signals for use with many standard computer ICs.
The HCTL-2022 has most of the HCTL-2032 features, but it can only supports single axis and fxed at 4x count mode. The HCTL-2022 doesn’t provide decoder output and cascade signals.

FEATUREs
• Interfaces Encoder to Microprocessor
• 33 MHz Clock Operation
• Programmable Count Modes (1x, 2x or 4x)
• Single or Dual Axis Support
• Index Channel Support
• High Noise Immunity:
• Schmitt Trigger Inputs and Digital Noise Filter
• 32-Bit Binary Up/Down Counter
• Latched Outputs
• 8-Bit Tristate Interface
• 8, 16, 24, or 32-Bit Operating Modes
• Quadrature Decoder Output Signals, Up/Down and Count
• Cascade Output Signals, Up/Down and Count
• Substantially Reduced System Software
• 5V Operation (VDD - VSS)
• TTL/CMOS Compatible I/O
• Operating Temperature: -40°C to 100°C
• 32-Pin PDIP, 32-Pin SOIC, 20-Pin PDIP

APPLICATIONs
• Interface Quadrature Incremental Encoders to Microprocessors
• Interface Digital Potentiometers to Digital Data Input Buses