X9448

Temperature under bias ......................... -65 to +135
Storage temperature .............................. -65 to +150
Voltage on SDA, SCL or any
address input with respect to V_SS .................. -1V to +7V
Voltage on any V+ (referenced to V_SS) ..................... +7V
Voltage on any V- (referenced to V_SS) ....................... -7V
(V+) - (V-) ...................................................................10V
Any V_H...........................................................................V+
Any V_L .....................................................................VLead
temperature (soldering, 10 seconds)....................... 300

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 X9448 integrates two nonvolatile digitally controlled potentiometers (XDCP) and two voltage comparators on a CMOS monolithic microcircuit.

The X9448 contains two resistor arrays, each composed of 63 resistive elements. Between each element and at either end are tap points accessible to the wiper elements. The position of the wiper element on the array is controlled by the user through the two wire serial bus interface.

Each X9448 potentiometer has an associated voltage comparator. The comparator compares the external input voltage V_NI with the wiper voltage V_W and sets the output voltage level to a logic high or low.

Each resistor array and comparator has associated with it a wiper counter register (WCR), analog control register (ACR), and eight 6-bit data registers that can be directly written and read by the user. The contents of the wiper counter register controls the position of the wiper on the resistor array. The contents of the analog control register controls the comparator and its output. The X9448 potentiometer is programmed with a 2-wire serial interface.