CAT5128TBI-10GT3 ON Semiconductor, CAT5128TBI-10GT3 Datasheet - Page 2

• Manufacturer Part Number: CAT5128TBI-10GT3
• Description: IC POT DIGITL 10K 32TAP SOT23-8
• Manufacturer: ON Semiconductor
• Series: DPPr

Specifications of CAT5128TBI-10GT3

• Taps: 32
• Resistance (ohms): 10K
• Number Of Circuits: 1
• Temperature Coefficient: 50 ppm/°C Typical
• Memory Type: Volatile
• Interface: Up/Down
• Voltage - Supply: 2.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-8
• Resistance In Ohms: 10K
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: CAT5128TBI-10-GT3CT; CAT5128TBI-10-GT3CT; CAT5128TBI-10GT3CT; CAT5128TDI-10-GT3CT; CAT5128TDI-10-GT3CT

Functional Diagrams
Pin Description
UP: Step−Up Control Input
UP input will cause the wiper to move one increment toward
the A terminal.
DOWN: Step−Down Control Input
wiper to move one increment towards the B terminal.
A: High End Potentiometer Terminal
required that this terminal be connected to a potential greater
than the B terminal. Voltage applied to the A terminal cannot
exceed the supply voltage, V
W: Wiper Potentiometer Terminal
on the resistor array is controlled by the control inputs, UP
and DOWN. Voltage applied to the W terminal cannot
exceed the supply voltage, V
B: Low End Potentiometer Terminal
required that this terminal be connected to a potential less
than the A terminal. Voltage applied to the B terminal cannot
exceed the supply voltage, V
B and A are electrically interchangeable.
DOWN
When DOWN input is high, a high−to−low transition on
A high−to−low transition on DOWN input will cause the
A is the high end terminal of the potentiometer. It is not
W is the wiper terminal of the potentiometer. Its position
B is the low end terminal of the potentiometer. It is not
UP
Figure 1. General
UP/DOWN
Power On
Control
Recall
V
CC
GND
CC
CC
CC
or go below ground, GND.
or go below ground, GND.
or go below ground, GND.
DOWN
A
W
B
GND
V
UP
CC
UP/DOWN
COUNTER
5−BIT
http://onsemi.com
Figure 2. Detailed
2
Device Operation
potentiometer with A and B equivalent to the high and low
terminals
potentiometer’s wiper. There are 32 available tap positions
including the resistor end points, A and B. There are 31
resistor elements connected in series between the A and B
terminals. The wiper terminal is connected to one of the 32
taps and controlled by two inputs, UP and DOWN. These
inputs control a five−bit up/down counter whose output is
decoded to select the wiper position.
one step the wiper position (R
and R
input is high, a high−to−low transition on UP input will
increment one step the wiper position (R
with 1LSB and R
mechanical equivalent and does not move beyond the last
position. When the CAT5128 is powered−down, the wiper
position is reset. When power is restored, the counter is set
to the mid point, tap 15.
The CAT5128 operates like a digitally controlled
A high−to−low transition on DOWN input will decrement
The wiper, when at either fixed terminal, acts like its
31
30
29
28
WA
2
1
0
will increase with 1LSB). If and only if DOWN
and
TRANS−
GATES
FER
WA
W
will decrease with 1LSB).
equivalent
WB
will decrease with 1LSB
A
B
W
Figure 3. Electronic
to
Implementation
Potentiometer
the
WB
will increase
mechanical
A
W
B