CAT5112Z-50-TE13 ON Semiconductor, CAT5112Z-50-TE13 Datasheet - Page 2

• Manufacturer Part Number: CAT5112Z-50-TE13
• Manufacturer: ON Semiconductor

Specifications of CAT5112Z-50-TE13

• Number Of Elements: 1
• # Of Taps: 32
• Resistance (max): 50KOhm
• Power Supply Requirement: Single
• Interface Type: Serial (3-Wire)
• Single Supply Voltage (typ): 3.3/5V
• Dual Supply Voltage (typ): Not RequiredV
• Single Supply Voltage (min): 2.5V
• Single Supply Voltage (max): 6V
• Dual Supply Voltage (min): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 8
• Lead Free Status / RoHS Status: Compliant

GND
INC
INC
INC
INC
INC: Increment Control Input
The INC input (on the falling edge) moves the wiper in the
up or down direction determined by the condition of the
U/D 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
and CS is low, any high-to-low transition on INC will
cause the wiper to move one increment towards the
R
R
required that this terminal be connected to a potential
greater than the R
terminal cannot exceed the supply voltage, V
below ground, GND.
R
position on the resistor array is controlled by the control
inputs, INC, U/D and CS.
R
required that this terminal be connected to a potential
less than the R
terminal cannot exceed the supply voltage, V
below ground, GND. R
interchangeable.
CS
CS
CS
CS
CS: Chip Select
The chip select input is used to activate the control input
CAT5112
Doc. No. 2002, Rev. L
GND
INC
U/D
R H
INC
U/D
H
WB
L
L
R H
D D D D D : Up/Down Control Input
: Low End Potentiometer Terminal
is the low end terminal of the potentiometer. It is not
terminal.
is the high end terminal of the potentiometer. It is not
High End Potentiometer Terminal
: Wiper Potentiometer Terminal (Buffered)
is the buffered wiper terminal of the potentiometer. Its
1
2
3
4
1
2
3
4
8
7
6
5
8
7
6
5
H
terminal. Voltage applied to the R
L
V
CS
R L
R WB
terminal. Voltage applied to the R
V
CS
R L
R WB
CC
CC
H
terminal. When in a low state
L
V
GND
INC
U/D
CS
CC
INC
U/D
R H
and R
1
2
3
4
1
2
3
4
H
are electrically
8
7
6
5
8
7
6
5
CC
CC
V
CS
R WB
R L
R L
R WB
GND
R H
CC
or go
or go
H
L
2
of the CAT5112 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.
The CAT5112 operates like a digitally controlled
potentiometer with R
and low terminals and R
potentiometer's wiper. There are 32 available tap posi-
tions including the resistor end points, R
are 31 resistor elements connected in series between
the R
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. The selected wiper position can be
stored in nonvolatile memory using the INC and
CS inputs.
With CS set LOW the CAT5112 is selected and will
respond to the U/D and INC inputs. HIGH to LOW
transitions on INC wil 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. The value of the counter is
stored in nonvolatile memory whenever CS transitions
HIGH while the INC input is also HIGH. When the
CAT5112 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.
With INC set low, the CAT5112 may be de-selected
and 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.
INC
U/D
R
GND
R
R
CS
V
CC
H
WB
L
H
and R
L
Increment Control
Up/Down Control
Potentiometer High Terminal
Ground
Buffered Wiper Terminal
Potentiometer Low Terminal
Chip Select
Supply Voltage
terminals. The wiper terminal is
H
WB
and R
equivalent to the mechanical
L
equivalent to the high
H
and R
L
. There