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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