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PDF CAT5124 Data sheet ( Hoja de datos )
| Número de pieza | CAT5124 | |
| Descripción | (CAT5110 - CAT5125) Digitally Programmable Potentiometers | |
| Fabricantes | Catalyst Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de CAT5124 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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CAT5110, CAT5118, CAT5119
CAT5123, CAT5124, CAT5125
32-Tap MiniPot™ Digitally Programmable
Potentiometers with 2-Wire Interface
Features
■ 0.3µA Ultra-low standby current
■ Single-supply operation: 2.7V to 5.5V
■ Glitchless switching between resistor taps
■ Power-on reset to midscale
■ 2-Wire up/down serial interface
■ Resistance values: 10kΩ, 50kΩ and 100kΩ
■ All devices available in SOT-23 package
■ CAT5110, CAT5118, CAT5119 also available in
SC70
Applications
■ LCD screen adjustment
■ Volume control
■ Mechanical potentiometer replacement
■ Gain adjustment
■ Line impedance matching
For Ordering Information details, see page 11.
DEscription
CAT5110/5118/5119/5123/5124/5125 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 poten-
tiometers. The CAT5118/19/23/24 are configured as
variable resistors.
Three resistance values are available: 10kΩ, 50kΩ and
100kΩ. All devices are available in space-saving 5-pin
and 6-pin SOT-23 packages. The CAT5110/5118/5119
are also available in the SC70 package.
Functional Diagram
VDD
GND
CS
H
W
U/D
Pin Configuration
sOT-23
VDD
6H
sOT-23
sOT-23
VDD
5H
VDD
6H
GND 2
5W
CAT5110
U/D 3 CAT5125 4 CS
GND 2
CAT5118
U/D 3 CAT5123
GND 2
5L
CAT5119
4 CS U/D 3 CAT5124 4 CS
sC70
VDD
6H
sC70
VDD
5H
VDD
sC70
6H
GND 2
5 W GND 2
GND 2
5L
U/D 3 CAT5110 4 CS U/D 3 CAT5118 4 CS U/D 3 CAT5119 4 CS
© 2007 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
L
Doc. No. 2120, Rev. E
1 page  
www.DataSheet4U.com
CAT5110, CAT5118, CAT5119, CAT5123, CAT5124, CAT5125
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: 10kΩ, 50kΩ and 100kΩ.
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 MiniPots 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 1 and 2).
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 1. Serial Interface Timing Diagram, Increment Mode
CS
t CU
U/D
t CI
W
Note: "W" is not a digital signal. It represents wiper transitions.
t IL
t SETTLE
t IH
t IC
t SETTLE
Figure 2. Serial Interface Timing Diagram, Decrement Mode
CS
t CU
U/D
t IH
t CI
W
t SETTLE
Note: "W" is not a digital signal. It represents wiper transitions.
t IL
t IC
t SETTLE
© 2007 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
Doc No. 2120, Rev. E
5 Page 
www.DataSheet4U.com
CAT5110, CAT5118, CAT5119, CAT5123, CAT5124, CAT5125
Example of Ordering Information
Prefix Device #
Suffix
CAT
5110
SD I -10 -G
T3
Optional
Company ID
Product Number
5110
5118
5119
5123
5124
5125
Package
SD: SC70
TB: SOT23
Resistance
-10: 10kohms
-50: 50kohms
-00: 100kohms
Tape & Reel
T: Tape & Reel
3: 3000 units/reel
10: 10000 units/reel
Temperature Range
I: Inductrial (-40ºC to +85ºC)
Lead Finish
G: NiPdAu
Blank: Matte-Tin
Notes:
(1) All packages are RoHS-compliant (Lead-free, Halogen-free).
(2) The device used in the example above is a CAT5110SDI-10 -GT3 (NiPdAu, Tape and Reel).
(3) The standard finish for SOT23 package is Matte-Tin.
(4) The standard finish for SC70 package is NiPdAu.
(5) For additional package and temperature options, please contact your nearest Catalyst Semiconductor Sales office.
© 2007 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
11
Doc No. 2120, Rev. E
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet CAT5124.PDF ] | |
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