© Semiconductor Components Industries, LLC, 2012
January, 2012 − Rev. 12
1Publication Order Number:
CAT5110/D
CAT5110, CAT5118,
CAT5119, CAT5123,
CAT5124, CAT5125
32-Tap Digitally
Programmable
Potentiometers with 2-Wire
Interface
Description
CAT5110/18/19/23/24/25 linear−taper digitally programmable
potentiometers perform the same function as a mechanical
potentiometer or a variable resistor. These devices consist of a fixed
resistor and a wiper contact with 32−tap points that are digitally
controlled through a 2−wire up/down serial interface.
The CAT5110 and CAT5125 are configured as potentiometers. The
CAT5118/19/23/24 are configured as variable resistors.
Three resistance values are available: 10 kW, 50 kW and 100 kW. All
devices are available in space−saving 5−pin and 6−pin SOT−23
packages. The CAT5110/18/19 are also available in the SC−70
package.
Features
•0.3 mA Ultra−low Standby Current
•Single−supply Operation: 2.7 V to 5.5 V
•Glitchless Switching between Resistor Taps
•Power−on Reset to Midscale
•2−wire Up/Down Serial Interface
•Resistance Values: 10 kW, 50 kW and 100 kW
•Low Wiper Resistance: 80 W for CAT5123, CAT5124, CAT5125
•CAT5110, CAT5118, CAT5119 Available in SC−70
•These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
Applications
•LCD Screen Adjustment
•Volume Control
•Mechanical Potentiometer Replacement
•Gain Adjustment
•Line Impedance Matching
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SC−70
SD SUFFIX
CASE 419AD
PIN CONNECTIONS
(Top Views)
SOT−23
TB SUFFIX
CASE 527AJ
SC−70
SD SUFFIX
CASE 419AC
SOT−23
TB SUFFIX
CASE 527AH
See detailed ordering and shipping information in the package
dimensions section on page 7 of this data sheet.
ORDERING INFORMATION
GND
16H
2
34
W
5
CAT5110
CAT5125
SOT−23
GND
16
H
2
34
W
5
CAT5110
SC−70
GND
H
2
CAT5118
CAT5123
15
34
GND
H
2
CAT5118
15
34
GND
H
L
5
34
GND
16H
2L
5
CAT5119
CAT5124
34
2
CAT5119
16
U/D
VDD
CS CS
VDD
U/D
SOT−23 SC−70
SOT−23 SC−70
CS
CS
VDD
VDD
U/D
CS
U/D
VDD
CS
U/D U/D
VDD
CAT5110, CAT5118, CAT5119, CAT5123, CAT5124, CAT5125
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2
32−POSITION
DECODER
UP−DOWN
COUNTER
GND
H
L
W
Figure 1. Functional Diagram
U/D
CS
VDD
Table 1. PIN DESCRIPTIONS
Pin Number
Pin
Name Description
CAT5110/
CAT5125
CAT5118/
CAT5123
CAT5119/
CAT5124
1 1 1 VDD Power Supply
2 2 2 GND Ground
3 3 3 U/D Up/Down Control Input. With CS low, a low−to−high transition increments
or decrements the wiper position.
4 4 4 CS Chip Select Input. A high−to−low CS transition determines the mode:
increment if U/D is high, or decrement if U/D is low.
− − 5 L Low Terminal of Resistor
5− − WWiper Terminal of Resistor
6 6 6 H High Terminal of Resistor
Table 2. ABSOLUTE MAXIMUM RATINGS
Parameters Ratings Units
VDD to GND −0.3 to +6 V
All Other Pins to GND −0.3 to (VDD + 0.3) V
Input and Output Latch−Up Immunity ±200 mA
Maximum Continuous Current into H, L and W
100 kW
50 kW
10 kW
±0.6
±1.3
±1.3
mA
Continuous Power Dissipation (TA = +70°C)
5−pin SC−70 (Note 1)
6−pin SC−70 (Note 1)
247
245
mW
Operating Temperature Range −40 to +85 °C
Junction Temperature +150 °C
Storage Temperature Range −65 to +150 °C
Soldering Temperature (soldering, 10 sec) +300 °C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. Derate 3.1 mW/°C above TA = +70°C
CAT5110, CAT5118, CAT5119, CAT5123, CAT5124, CAT5125
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Table 3. ELECTRICAL CHARACTERISTICS
(VDD = 2.7 V to 5.5 V, VH = VDD, VL = 0, TA = −40°C to +85°C. Typical values are at VDD = 2.7 V, TA = 25°C, unless otherwise noted.)
Parameter Symbol Conditions Min Typ Max Units
DC PERFORMANCE
Resolution 32 Taps
End−to−End Resistance (−00) 80 100 120 kW
End−to−End Resistance (−50) 40 50 60
End−to−End Resistance (−10) 8 10 12
End−to−End Resistance Tempco TCRCAT5110/18/19 200 ppm/°C
CAT5123/24/25 30 300
Ratiometric Resistance Tempco 5 ppm/°C
Integral Nonlinearity INL ±0.5 ±1 LSB
Differential Nonlinearity DNL ±1 LSB
Full−Scale Error ±0.1 LSB
Zero−Scale Error 1 LSB
Wiper Resistance RWCAT5110/18/19 200 600 W
CAT5123/24/25 80 200
DIGITAL INPUTS
Input High Voltage VIH 0.7 x VDD V
Input Low Voltage VIL 0.3 x VDD V
TIMING CHARACTERISTICS (Figures 7, 8)
U/D Mode to CS Setup tCU 25 ns
CS to U/D Step Setup tCI 50 ns
CS to U/D Step Hold tIC 25 ns
U/D Step Low Period tIL 25 ns
U/D Step High Period tIH 25 ns
Up/Down Toggle Rate (Note 2) fTOGGLE 1 MHz
Output Settling Time (Note 3) tSETTLE 100 kW variable resistor
configuration, CL = 10 pF
1ms
100 kW potentiometer
configuration, CL = 10 pF
0.25
POWER SUPPLY
Supply Voltage VDD 2.7 5.5 V
Active Supply Current (Note 4) IDD 25 mA
Standby Supply Current (Note 5) ISB VDD = +5 V 0.3 1 mA
2. Up/Down Toggle Rate: fTOGGLE = 1 / tSETTLE
3. Typical settling times are dependent on end−to−end resistance.
4. Supply current measureed while changing wiper tap, fTOGGLE = 1 MHz.
5. Supply current measureed while wiper position is fixed.
CAT5110, CAT5118, CAT5119, CAT5123, CAT5124, CAT5125
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TYPICAL OPERATING CHARACTERISTICS
(TA = 25°C, unless otherwise noted.)
Figure 2. Wiper Resistance vs. Wiper Position Figure 3. Change in End−to−End Resistance
vs. Temperature
WIPER POSITION TEMPERATURE (°C)
302520151050
0
20
40
60
100
120
140
160
100500−50
−1.5
−1.0
−0.5
0
0.5
1.0
1.5
Figure 4. W−to−L Resistance vs. Tap Position Figure 5. Supply Current vs. Temperature
TAP POSITION TEMPERATURE (°C)
2925211713951
0
20
40
60
80
100
120
150100500−50
0
0.05
0.15
0.20
0.25
0.30
0.40
0.45
Figure 6. Tap−to−Tap Switching Transient
RW (W)
END−TO−END RESISTANCE
CHANGE (%)
RESISTANCE (kW)
CURRENT (mA)
80
CAT5110/5118/5119
CAT5123/5124/5125
VDD = 2.7 V
CAT5110/5118/5119
CAT5123/5124/5125
31272319151173
100 k
50 k
10 k
0.10
0.35
VDD = 2.7 V
VDD = 5.5 V
200 ns/div
U/D
2 V/div
WIPER
OUTPUT
100 mV/div
CAT5110, CAT5118, CAT5119, CAT5123, CAT5124, CAT5125
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Functional Description
The CAT5110/5118/5119/5123/5124/5125 consist of a
fixed resistor and a wiper contact with 32−tap points that are
digitally controlled through a 2−wire up/down serial
interface. Three end−to−end resistance values are available:
10 kW, 50 kW and 100 kW.
The CAT5110/5125 is designed to operate as a
potentiometer. In this configuration, the low terminal of the
resistor array is connected to ground (pin 2).
The CAT5118/5123 performs as a variable resistor. In this
device, the wiper terminal and high terminal of the resistor
array are connected at pin 5. The CAT5119/5124 is a similar
variable resistor, except the low terminal is connected to
pin 5.
Digital Interface Operation
The devices have two modes of operation when the serial
interface is active: increment and decrement mode. The
serial interface is only active when CS is low.
The CS and U/D inputs control the position of the wiper
along the resistor array. When CS transitions from high to
low, the part will go into increment mode if U/D input is
high, and into decrement mode when U/D input is low. Once
the mode is set, the device will remain in that mode until CS
goes high again. A low−to−high transition at the U/D pin
will increment or decrement the wiper position depending
on the current mode (Figures 7 and 8).
When the CS input transitions to high (serial interface
inactive), the value of the counter is stored and the wiper
position is maintained.
Note that when the wiper reaches the maximum (or
minimum) tap position, the wiper will not wrap around to the
minimum (or maximum) position.
Power−On Reset
All parts in this family feature power−on reset (POR)
circuitry that sets the wiper position to midscale at
power−up. By default, the chip is in the increment mode.
Figure 7. Serial Interface Timing Diagram, Increment Mode
W
U/D
CS
tCU
tCI
tIL
tIH
tSETTLE
tSETTLE
tIC
Note: “W” is not a digital signal. It represents wiper transitions.
Figure 8. Serial Interface Timing Diagram, Decrement Mode
W
Note: “W” is not a digital signal. It represents wiper transitions.
tSETTLE
tCI
tCU
U/D
CS
tIH
tIL
tSETTLE
tIC
CAT5110, CAT5118, CAT5119, CAT5123, CAT5124, CAT5125
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Applications Information
The devices are intended for circuits requiring digitally
controlled adjustable resistance, such as LCD contrast
control, where voltage biasing adjusts the display contrast.
Alternative Positive LCD Bias Control
An op amp can be used to provide buffering and gain on
the output of the CAT5110/CAT5125. This can be done by
connecting the wiper output to the positive input of a
noninverting op amp as shown in Figure 9. Figure 10 shows
a similar circuit for the CAT5119/CAT5124.
Adjustable Gain
Figures 11 and 12 show how to use either a variable
resistor or a potentiometer to digitally adjust the gain of a
noninverting op amp configuration, by connecting the
devices in series with a resistor to ground. The devices have
a low 5 ppm/°C ratiometric tempco that allows for a very
stable adjustable gain configuration over temperature.
30 V
W
L
H
+5 V
CAT5110/CAT5125
30 V
L
H
+5 V
CAT5119/CAT5124
L
H
LH
W
CAT5110/CAT5125
CAT5118/CAT5123
Figure 9. Positive LCD Bias Control Figure 10. Positive LCD Bias Control
Figure 11. Adjustable Gain Circuit Figure 12. Adjustable Gain Circuit
VOUT VOUT
VIN
VCC
VOUT
VIN
VCC
VOUT
CAT5110, CAT5118, CAT5119, CAT5123, CAT5124, CAT5125
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Table 4. ORDERING INFORMATION
Device Orderable Part Number Resistor [kW]Pin Package Shipping†
CAT5110
CAT5110SDI−10GT3 10 SC70−63000 / Tape & Reel
CAT5110TBI−10−T3 10 SOT23−63000 / Tape & Reel
CAT5110TBI−10GT3 10 SOT23−63000 / Tape & Reel
CAT5110SDI−50GT3 50 SC70−63000 / Tape & Reel
CAT5110TBI−50−T3 50 SOT23−63000 / Tape & Reel
CAT5110TBI−50GT3 50 SOT23−63000 / Tape & Reel
CAT5110SDI−00GT3 100 SC70−63000 / Tape & Reel
CAT5110TBI−00−T3 100 SOT23−63000 / Tape & Reel
CAT5110TBI−00GT3 100 SOT23−63000 / Tape & Reel
CAT5118
CAT5118SDI−10GT3 10 SC70−53000 / Tape & Reel
CAT5118TBI−10−T3 10 SOT23−53000 / Tape & Reel
CAT5118TBI−10GT3 10 SOT23−53000 / Tape & Reel
CAT5118SDI−50GT3 50 SC70−53000 / Tape & Reel
CAT5118TBI−50−T3 50 SOT23−53000 / Tape & Reel
CAT5118TBI−50GT3 50 SOT23−53000 / Tape & Reel
CAT5118SDI−00GT3 100 SC70−53000 / Tape & Reel
CAT5118TBI−00−T3 100 SOT23−53000 / Tape & Reel
CAT5118TBI−00GT3 100 SOT23−53000 / Tape & Reel
CAT5119
CAT5119SDI−10GT3 10 SC70−63000 / Tape & Reel
CAT5119TBI−10−T3 10 SOT23−63000 / Tape & Reel
CAT5119TBI−10GT3 10 SOT23−63000 / Tape & Reel
CAT5119SDI−50GT3 50 SC70−63000 / Tape & Reel
CAT5119TBI−50−T3 50 SOT23−63000 / Tape & Reel
CAT5119TBI−50GT3 50 SOT23−63000 / Tape & Reel
CAT5119SDI−00GT3 100 SC70−63000 / Tape & Reel
CAT5119TBI−00−T3 100 SOT23−63000 / Tape & Reel
CAT5119TBI−00GT3 100 SOT23−63000 / Tape & Reel
CAT5123
CAT5123TBI−10−T3 10 SOT23−53000 / Tape & Reel
CAT5123TBI−10GT3 10 SOT23−53000 / Tape & Reel
CAT5123TBI−50−T3 (Note 7) 50 SOT23−53000 / Tape & Reel
CAT5123TBI−50GT3 (Note 7) 50 SOT23−53000 / Tape & Reel
CAT5123TBI−00−T3 (Note 7) 100 SOT23−53000 / Tape & Reel
CAT5123TBI−00GT3 (Note 7) 100 SOT23−53000 / Tape & Reel
CAT5124
CAT5124TBI−10−T3 (Note 7) 10 SOT23−63000 / Tape & Reel
CAT5124TBI−10GT3 (Note 7) 10 SOT23−63000 / Tape & Reel
CAT5124TBI−50−T3 50 SOT23−63000 / Tape & Reel
CAT5124TBI−50GT3 50 SOT23−63000 / Tape & Reel
CAT5124TBI−00−T3 (Note 7) 100 SOT23−63000 / Tape & Reel
CAT5124TBI−00GT3 (Note 7) 100 SOT23−63000 / Tape & Reel
CAT5125
CAT5125TBI−10−T3 10 SOT23−63000 / Tape & Reel
CAT5125TBI−10GT3 10 SOT23−63000 / Tape & Reel
CAT5125TBI−50−T3 (Notes 7) 50 SOT23−63000 / Tape & Reel
CAT5125TBI−50GT3 (Note 7) 50 SOT23−63000 / Tape & Reel
CAT5125TBI−00−T3 (Notes 7) 100 SOT23−63000 / Tape & Reel
CAT5125TBI−00GT3 (Note 7) 100 SOT23−63000 / Tape & Reel
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
6. For detailed information and a breakdown of device nomenclature and numbering systems, please see the ON Semiconductor Device
Nomenclature document, TND310/D, available at www.onsemi.com.
7. Contact factory for availability.
8. All packages are RoHS−compliant (Pb−Free, Halogen−Free).
9. The standard finish is NiPdAu.
10.For additional package and temperature options, please contact your nearest ON Semiconductor Sales office.
CAT5110, CAT5118, CAT5119, CAT5123, CAT5124, CAT5125
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8
PACKAGE DIMENSIONS
SC−70, 6 Lead, 1.25x2
CASE 419AD−01
ISSUE O
E1
D
A
L
L1 L2
ee
bA1
A2
c
TOP VIEW
SIDE VIEW END VIEW
q1
q1
Notes:
(1) All dimensions are in millimeters. Angles in degrees.
(2) Complies with JEDEC MO-203.
E
q
SYMBOL MIN NOM MAX
θ
A
A1
b
c
D
E
E1
e
L
0º 8º
L2
0.00
0.15
0.10
0.26
1.80
1.80
1.15
0.65 BSC
0.15 BSC
1.10
0.10
0.30
0.18
0.46
2.20
2.40
1.35
L1
0.80
θ1 4º 10º
A2 0.80 1.00
0.42 REF
0.36
2.00
2.10
1.25
CAT5110, CAT5118, CAT5119, CAT5123, CAT5124, CAT5125
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PACKAGE DIMENSIONS
SOT−23, 6 Lead
CASE 527AJ−01
ISSUE O
TOP VIEW
SIDE VIEW END VIEW
E1 E
PIN #1 IDENTIFICATION
A2
A1
e
b
D
c
A
L1 L
L2
Notes:
(1) All dimensions in millimeters. Angles in degrees.
(2) Complies with JEDEC standard MO-178.
θ2
θ1
θ
SYMBOL MIN NOM MAX
θ2 5° 15°
A
A1
A2
b
c
D
E
E1
L
L2
0.00
0.90
0.30
0.08
2.90 BSC
1.60 BSC
0.45
1.45
0.15
1.30
0.50
0.22
0.25 REF
1.15
2.80 BSC
L1 0.60 REF
e
0.30 0.60
0.95 BSC
0.90
10°
θ1 5° 15°10°
θ0° 8°4°
CAT5110, CAT5118, CAT5119, CAT5123, CAT5124, CAT5125
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PACKAGE DIMENSIONS
SC−70, 5 Lead, 1.25x2
CASE 419AC−01
ISSUE O
E1
D
A
L
L1 L2
ee
bA1
A2
c
TOP VIEW
SIDE VIEW END VIEW
q1
q1
Notes:
(1) All dimensions are in millimeters. Angles in degrees.
(2) Complies with JEDEC MO-203.
E
q
SYMBOL MIN NOM MAX
θ
A
A1
b
c
D
E
E1
e
L
0º 8º
L2
0.00
0.15
0.10
0.26
1.80
1.80
1.15
0.65 BSC
0.15 BSC
1.10
0.10
0.30
0.18
0.46
2.20
2.40
1.35
L1
0.80
θ1 4º 10º
A2 0.80 1.00
0.42 REF
0.36
2.00
2.10
1.25
CAT5110, CAT5118, CAT5119, CAT5123, CAT5124, CAT5125
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11
PACKAGE DIMENSIONS
SOT−23, 5 Lead
CASE 527AH−01
ISSUE O
TOP VIEW
SIDE VIEW END VIEW
E1 E
PIN #1 IDENTIFICATION
A2
A1
e
b
D
c
A
L1 L
L2
Notes:
(1) All dimensions in millimeters. Angles in degrees.
(2) Complies with JEDEC standard MO-178.
θ2
θ1
SYMBOL MIN NOM MAX
θ
θ2 5° 15°
A
A1
A2
b
c
D
E
E1
L
L2
0.00
0.90
0.30
0.08
2.90 BSC
1.60 BSC
0.45
1.45
0.15
1.30
0.50
0.22
0.25 REF
1.15
2.80 BSC
L1 0.60 REF
e
0.30 0.60
0.95 BSC
0.90
10°
θ1 5° 15°10°
θ0° 8°4°
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to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.
“Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All
operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights
nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications
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PUBLICATION ORDERING INFORMATION
N. American Technical Support: 800−282−9855 Toll Free
USA/Canada
Europe, Middle East and Africa Technical Support:
Phone: 421 33 790 2910
Japan Customer Focus Center
Phone: 81−3−5817−1050
CAT5110/D
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