2-178

H

Quadrature Decoder/Counter

Interface ICs

Technical Data

HCTL-2000

HCTL-2016

HCTL-2020

Features

• Interfaces Encoder to

Microprocessor

• 14 MHz Clock Operation

• Full 4X Decode

• High Noise Immunity:

Schmitt Trigger Inputs Digital

Noise Filter

• 12 or 16-Bit Binary Up/

Down Counter

• Latched Outputs

• 8-Bit Tristate Interface

• 8, 12, or 16-Bit Operating

Modes

• Quadrature Decoder Output

Signals, Up/Down and Count

• Cascade Output Signals, Up/

Down and Count

• Substantially Reduced

System Software

ESD WARNING: Standard CMOS handling precautions should be observed with the HCTL-20XX family

ICs.

Devices

Part Number

Description

Package Drawing

HCTL-2000

12-bit counter. 14 MHz clock operation.

A

HCTL-2016

All features of the HCTL-2000. 16-bit counter.

A

HCTL-2020

All features of the HCTL-2016. Quadrature decoder output

B

signals. Cascade output signals.

Description

The HCTL-2000, 2016, 2020 are

CMOS ICs that perform the

quadrature decoder, counter, and

bus interface function. The

HCTL-20XX family is designed to

improve system performance

Applications

• Interface Quadrature

Incremental Encoders to

Microprocessors

• Interface Digital Potentiom-

eters to Digital Data Input

Buses

5965-5894E