Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois 60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Optical and Mechanical
Encoders
Optical Encoders
Available from your local Grayhill Distributor. For prices and discounts, contact a local Sales Office, an authorized local Distributor or Grayhill.
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
ORDERING INFORMATION
GH65C11-X-YY
Temperature: Packaging:
C = Commercial (0° C to 70° C) PD = 18 lead 300 mil wide Plastic DIP
N = Industrial (-40° C to 85° C) 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.
• Simplified Microprocessor Interface
Reduces Design Time
• Debounces Encoder Integral
Pushbutton Switch
• Ideal for Battery Powered
Applications that Include Optical
Encoders
For additional information about the use of the
GH65 interface chips with optical encoders
request Grayhill Application Note #719.
DESCRIPTION
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
(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
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.
Name Type* Description
M0, M1 I Mode selection input pins
V
DD
P 3–6 Vdc power source
RES I Reset pin, normally connected to V
DD
V
SS
P GND, 0v nominal power return
ØAI, ØBI I Phase A and B quadrature input pins
SWI I Switch input pin
SWO O Debounced switch output pin
NC O No connect, this pin must be left unconnected
PW O Power source for encoder power management
RC I/O RC oscillator pin
ØBO/DN/DR O Phase B, down, direction, mode conditional output pin
ØAO/UP/MG O Phase A, up, magnitude, mode conditional output pin
* Pin Types: I = Input, O = Output, P = Power.
M0
M1
V
RES
V
ØAI
ØBI
SWI
SWO
ØBO/DN/DR
ØAO/UP/MG
RC
NC
V
PW
PW
PW
PW
SOIC/DIP
DD
SS
DD
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
M0
M1
V
RES
V
V
ØAI
ØBI
SWI
SWO
ØBO/DN/DR
ØAO/UP/MG
RC
NC
V
V
PW
PW
PW
PW
SSOP
DD
SS
SS
DD
DD
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
Encoder
50
