Optical Encoders SERIES 65 Optical Encoder Interface FEATURES • Interfaces with all Grayhill and Most Standard Quadrature Optical Encoders • Power Reduction of Up to 75-90% in Optical Encoder Use Through Power Management Feature • User Selectable Output Modes: Magnitude/Direction, Up/Down, Standard Quadrature • Simplified Microprocessor Interface Reduces Design Time • Debounces Encoder Integral Pushbutton Switch • Ideal for Battery Powered Applications that Include Optical Encoders DESCRIPTION Optical and Mechanical Encoders The GH65C11-X is designed to receive input from standard quadrature optical encoders. The power management feature allows power to the encoder to be applied only during sampling intervals, thus conserving power Name M0, M1 VDD RES VSS ØAI, ØBI SWI SWO NC PW RC ØBO/DN/DR ØAO/UP/MG Type* I P I P I I O O O I/O O O (especially advantageous in battery powered systems). Sample rate is a nominal 4K per second allowing high speed quadrature input. The optical encoder interface can operate in 1 of 3 user-selectable output modes. These Description Mode selection input pins 3–6 Vdc power source Reset pin, normally connected to VDD GND, 0v nominal power return Phase A and B quadrature input pins Switch input pin Debounced switch output pin No connect, this pin must be left unconnected Power source for encoder power management RC oscillator pin Phase B, down, direction, mode conditional output pin Phase A, up, magnitude, mode conditional output pin modes are: magnitude and direction, up and down count, and standard quadrature. Debouncing of an integral pushbutton switch within the optical encoder can also be accomplished. SOIC/DIP M0 M1 VDD RES VSS ØAI ØBI SWI SWO 1 2 3 4 5 6 7 8 9 18 17 16 15 14 13 12 11 10 SSOP ØBO/DN/DR ØAO/UP/MG RC NC VDD PW PW PW PW M0 M1 VDD RES VSS VSS ØAI ØBI SWI SWO 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 ØBO/DN/DR ØAO/UP/MG RC NC VDD VDD PW PW PW PW * Pin Types: I = Input, O = Output, P = Power. ORDERING INFORMATION GH65C11-X-YY Temperature: C = Commercial (0° C to 70° C) N = Industrial (-40° C to 85° C) Packaging: PD = 18 lead 300 mil wide Plastic DIP SO = 18 lead 300 mil wide gull wing SOIC SS* = 20 lead SSOP * The SS package style is not available in the -40°C to 85°C temperature range. Available from your local Grayhill Distributor. For prices and discounts, contact a local Sales Office, an authorized local Distributor or Grayhill. For additional information about the use of the GH65 interface chips with optical encoders request Grayhill Application Note #719. Encoder Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois 50 60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com