X9455

Junction Temperature under bias. . . . . . . . . . . . .-65 to +135
Storage temperature . . . . . . . . . . . . . . . . . . . . .. -65 to +150
Voltage at any digital interface pin
with respect to V_SS . . . . . . . . . . . . . . . . . . . . . . . . . . . -1V to +7V
V_CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... . -1V to +7V
Voltage at any DCP pin with
respect to V_SS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-1V to V_CC
Lead temperature (soldering, 10 seconds) . . . . . . . . . . . . 300
I_W (10 seconds) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±6mA
Commercial . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . .. 0 to +70
Industrial . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40 to +85
Supply Voltage (V_CC) (Note 4) Limits . . . . . . . . . . . . 2.7V to 5.5V

CAUTION: Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to
the device. This is a stress rating only; functional operation of the device (at these or any other
conditions above those listed in the operational sections of this specification) is not implied. Exposure
to absolute maximum rating conditions for extended periods may affect device reliability.

The X9455 integrates 2 digitally controlled potentiometers (XDCP), each one with dual wipers, on a monolithic CMOS integrated circuit.

The X9455 digitally controlled potentiometer is implemented using 255 resistive elements in a series array. Between each
element are tap points connected to wiper terminals through switches. The position of each wiper on the array is controlled by the user through the U/D or 2-wire bus interface. Each potentiometer wiper has associated with it two volatile Wiper Counter Register (WCR) and each WCR has associated with it four non-volatile Data Registers that can be directly written to and read by the user. The contents of the WCR controls the position of the wiper on the resistor array though the switches. The contents of the default data registers (DR0A0, DR0B0, DR1A0, DR1B0) are loaded into the WCR on power up.

The X9455 XDCP can be used as a four-terminal potentiometer in a wide variety of applications including the programming of bias voltages, window comparators, and three resistor programmable networks.