CAT5116VI-GT3 ON Semiconductor, CAT5116VI-GT3 Datasheet - Page 2

• Manufacturer Part Number: CAT5116VI-GT3
• Description: IC POT DIG LOG 32K 100TAP 8SOIC
• Manufacturer: ON Semiconductor

Specifications of CAT5116VI-GT3

• Taps: 100
• Resistance (ohms): 32K
• Number Of Circuits: 1
• Temperature Coefficient: 300 ppm/°C Typical
• Memory Type: Non-Volatile
• Interface: Up/Down
• Voltage - Supply: 2.5 V ~ 6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Resistance In Ohms: 32K
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Functional Diagram
Pin Description
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,
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 CAT5116 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.
U/D
INC
W
H
H
W
L
L
CS
: Low End Potentiometer Terminal
: High End Potentiometer Terminal
: Wiper Potentiometer Terminal
is the low end terminal of the potentiometer. It is not
is the high end terminal of the potentiometer. It is not
is the wiper terminal of the potentiometer. Its position on
L
and R
Figure 1. General
L
H
Power On
terminal. Voltage applied to the R
terminal. Voltage applied to the R
Memory
Control
Recall
V
GND
and
H
CC
are electrically interchangeable.
H
terminal. When in a low state and
CC
or go below ground, GND.
CC
CC
R
R
R
or go below ground,
or go below ground,
H
W
L
W
terminal cannot
L
U/D
INC
CS
GND
terminal.
H
L
terminal
terminal
http://onsemi.com
Figure 2. Block Diagram
EEPROM
Interface
Control
Wiper
V
CC
&
2
Potentiometer
Device Operation
potentiometer with R
terminals and R
potentiometer’s wiper. There are 100 tap positions including
the resistor end points, R
elements connected in series between the R
terminals. The wiper terminal is connected to one of the 100
taps and controlled by three inputs, INC, U/D and CS. These
inputs control a seven−bit up/down counter whose output is
decoded to select the wiper position. The selected wiper
position can be stored in nonvolatile memory using the INC
and CS inputs.
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 seven−bit
counter). The wiper, when at either fixed terminal, acts like
its mechanical equivalent and does not move beyond the last
position. The value of the counter is stored in nonvolatile
memory whenever CS transitions HIGH while the INC input
is also HIGH. When the CAT5116 is powered−down, the last
stored wiper counter position is maintained in the
nonvolatile memory. When power is restored, the contents
of the memory are recalled and the counter is set to the value
stored.
powered down without storing the current wiper position in
nonvolatile memory. This allows the system to always
power up to a preset value stored in nonvolatile memory.
R = 32 kΩ
The CAT5116 operates like a digitally controlled
With CS set LOW the CAT5116 is selected and will
With INC set low, the CAT5116 may be deselected and
R
R
L
H
W
H
R
and R
TOT
R
equivalent to the mechanical
W
H
= 32 kW
10.4 Ω
TAPER
L
and R
165 Ω
11 Ω
equivalent to the high and low
LOG
Figure 3. Potentiometer
L
. There are 99 resistor
Schematic
H
and R
R
R
R
H
W
L
L