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CAT5110TBI-00-GT10 Datasheet(Folha de dados) 5 Page - Catalyst Semiconductor

Nome de Peças. CAT5110TBI-00-GT10
descrição  32-Tap MiniPot TM Digitally Programmable Potentiometers with 2-Wire Interface
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Fbricantes  CATALYST [Catalyst Semiconductor]
Página de início  http://www.catalyst-semiconductor.com
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CAT5110, CAT5118, CAT5119, CAT5123, CAT5124, CAT5125
5
Doc No. 220, Rev. E
© 2007 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
CS
U/D
W
tCU
tIL
tIH
tSETTLE
tIC
tCI
tSETTLE
Note: "W" is not a digital signal. It represents wiper transitions.
FunCTIOnAl DesCrIPTIOn
The CAT50/58/59/523/524/525 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: 0kΩ, 50kΩ and 00kΩ.
The CAT50/525 is designed to operate as a
potentiometer. In this configuration, the low terminal of
the resistor array is connected to ground (pin 2).
The CAT58/523 performs as a variable resistor. In
this device, the wiper terminal and high terminal of the
resistor array are connected at pin 5.The CAT59/524
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
serialinterfaceisactive:incrementanddecrementmode.
The serial interface is only active when CS is low.
Figure 2. serial Interface Timing Diagram, Decrement Mode
Figure 1. serial Interface Timing Diagram, Increment Mode
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  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.
CS
U/D
W
tCU
tIL
tIH
tIC
tSETTLE
tCI
tSETTLE
Note: "W" is not a digital signal. It represents wiper transitions.




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