Quadrature Decoder/Counter Interface ICs

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HCTL-2xxx series is a direct drop-in replacement for HCTL-2000, HCTL-2020 and HCTL-2016 which has been obsoleted. It is a CMOS IC that performs quadrature decoding, bus interfacing and counter functions.

HCTL-2xxx series is designed to improve system performance in digital, closed loop motion control systems and digital data input systems. The highlight of our ICs are it being enhanced to lead-free (RoHs compliant) and customers can easily upgrade their existing HCTL decoders with this direct drop-in. Also, with the use of Schmitt-triggered CMOS input and input noise filter, it allows a more reliable operation in a noisy environment. This product is suitable for machine control manufacturers such as servo motors applications.


  • Interfaces Encoder to Microprocessor
  • 14Mhz Clock Operation
  • High Noise Immunity: Schmitt Trigger inputs and digital Noise filter
  • 16-Bit Binary Up/Down counter
  • Latched output
  • 8-Bit Tristate interface
  • 8,12 or 16-Bits 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 to 85 degree celcius
  • 16-Pin PDIP, 20-Pin PDIP, 20-Pin PLCC


  • Test and Measurement Equipment 
  • Safety Equipment
  • Servo and stepper motors
  • Printers
  • Fax Machines and Photo Copiers
  • Home Appliances
  • Meters and Monitoring
  • White Goods and Appliances

Lifecycle Status


Substance Compliance

  • RoHS6
    Fully Compliant
Specification Value
Lifecycle Active
Distrib. Inventory Yes
Counter Size 16 Bit
Frequency 14MHz
RoHS6 Compliant Y
Package PDIP