CAT5115ZI-10-GT3 ON Semiconductor, CAT5115ZI-10-GT3 Datasheet - Page 2

• Manufacturer Part Number: CAT5115ZI-10-GT3
• Description: DPP, 32 TAPS, U/D
• Manufacturer: ON Semiconductor

Specifications of CAT5115ZI-10-GT3

• Lead Free Status / Rohs Status: Compliant

Functional Diagram
Pin Function
INC: Increment Control Input
The INC input moves the wiper in the up or down direction
determined by the condition of the U/D input.
U/D: Up/Down Control Input
The U/D input controls the direction of the wiper movement.
When in a high state and CS is low, any high−to−low
transition on INC will cause the wiper to move one
increment toward the R
CS is low, any high−to−low transition on INC will cause the
wiper to move one increment towards the R
R
R
required that this terminal be connected to a potential greater
than the R
cannot exceed the supply voltage, V
GND.
R
R
the resistor array is controlled by the control inputs, INC,
Table 1. PIN DESCRIPTIONS
U/D
INC
W
H
H
W
CS
: High End Potentiometer Terminal
: Wiper Potentiometer Terminal
is the high end terminal of the potentiometer. It is not
is the wiper terminal of the potentiometer. Its position on
Name
GND
V
INC
U/D
R
CS
R
R
CC
W
H
L
L
Figure 1. General
terminal. Voltage applied to the R
Power−On
Control
Recall
GND
V
and
CC
Increment Control
Up/Down Control
Potentiometer High Terminal
Ground
Buffered Wiper Terminal
Potentiometer Low Terminal
Chip Select
Supply Voltage
H
terminal. When in a low state and
Function
CC
or go below ground,
R
R
R
H
W
L
L
GND
V
INC
U/D
CS
terminal.
DD
H
terminal
http://onsemi.com
2
Figure 2. Detailed
U/D and CS. Voltage applied to the R
exceed the supply voltage, V
R
R
required that this terminal be connected to a potential less
than the R
cannot exceed the supply voltage, V
GND. R
CS: Chip Select
The chip select input is used to activate the control input of
the CAT5115 and is active low. When in a high state, activity
on the INC and U/D inputs will not affect or change the
position of the wiper.
Device Operation
potentiometer with R
terminals and R
potentiometer’s wiper. There are 32 available tap positions
including the resistor end points, R
resistor elements connected in series between the R
terminals. The wiper terminal is connected to one of the 32
taps and controlled by three inputs, INC, U/D and CS. These
inputs control a five−bit up/down counter whose output is
decoded to select the wiper position.
respond to the U/D and INC inputs. HIGH to LOW
transitions on INC will increment or decrement the wiper
(depending on the state of the U/D input and five−bit
counter). The wiper, when at either fixed terminal, acts like
its mechanical equivalent and does not move beyond the last
position. When the CAT5115 is powered−down, the wiper
position is reset. When power is restored, the counter is set
to the mid point, tap 15.
L
L
The CAT5115 operates like a digitally controlled
With CS set LOW the CAT5115 is selected and will
: Low End Potentiometer Terminal
is the low end terminal of the potentiometer. It is not
L
and R
H
R
R
H
L
terminal. Voltage applied to the R
/V
/V
H
L
H
are electrically interchangeable.
W
H
R
and R
W
equivalent to the mechanical
/V
W
L
CC
equivalent to the high and low
or go below ground, GND.
Figure 3. Electronic
H
CC
Implementation
Potentiometer
and R
or go below ground,
W
terminal cannot
L
. There are 31
L
H
terminal
and R
R
R
R
H
W
L
L