Document
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
Applications
• Interface Quadrature Incremental Encoders to Microprocessors • Interface Digital Potentiometers to Digital Data Input Buses
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
Devices
Part Number HCTL-2000 HCTL-2016 HCTL-2020 Description 12-bit counter. 14 MHz clock operation. All features of the HCTL-2000. 16-bit counter. All features of the HCTL-2016. Quadrature decoder output signals. Cascade output signals. Package Drawing A A B
ESD WARNING: Standard CMOS handling precautions should be observed with the HCTL-20XX family ICs.
5965-5894E
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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 entire HCTL-20XX family consists of a 4x quadrature decoder, a binary up/down state counter,
and an 8-bit bus interface. The use of Schmitt-triggered CMOS inputs and input noise filters allows reliable operation in noisy environments. The HCTL-2000 contains a 12-bit counter. The HCTL-2016 and 2020 contain a 16-bit counter. The HCTL-2020 also contains quadrature decoder
output signals and cascade signals for use with many standard counter ICs. The HCTL20XX family provides LSTTL compatible tri-state output buffers. Operation is specified for a temperature range from -40 to +85°C at clock frequencies up to 14 MHz.
MOTION SENSING AND CONTROL
25.91 ± 0.25 (1.02 ± 0.010)
Package Dimensions
19.05 ± 0.25 (0.750 ± 0.010)
15 ° 1.52 ± 0.13 (0.060 ± 0.005) 9.40 (0.370)
15°
Operating Characteristics
Table 1. Absolute Maximum Ratings (All voltages below are referenced to VSS) Parameter DC Supply Voltage Input Voltage Storage Temperature Operating Temperature Symbol VDD VIN TS TA[1] Limits -0.3 to +5.5 -0.3 to VDD +0.3 -40 to +125 -40 to +85 Units V V °C °C
Table 2. Recommended Operating Conditions Parameter DC Supply Voltage Ambient Temperature Symbol VDD TA[1] Limits +4.5 to +5.5 -40 to +85 Units V °C
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Table 3. DC Characteristics VDD = 5 V ± 5%; TA = -40 to 85°C Symbol VIL[2] VIH[2] VT+ VTVH IIN VOH[2] VOL[2] IOZ IDD CIN COUT Parameter Low-Level Input Voltage High-Level Input Voltage Schmitt-Trigger PositiveGoing Threshold Schmitt-Trigger NegativeGoing Threshold Schmitt-Trigger Hysteresis Input Current High-Level Output Voltage Low-Level Output Voltage High-Z Output .