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X9438YV24I Datasheet(PDF) 2 Page - Intersil Corporation |
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X9438YV24I Datasheet(HTML) 2 Page - Intersil Corporation |
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2 / 18 page  2 FN8199.0 March 11, 2005 PIN DESCRIPTIONS Host Interface Pins Serial Clock (SCL) The SCL input is used to clock data into and out of the X9438. Serial Data (SDA) SDA is a bidirectional pin used to transfer data into and out of the device. It is an open drain output and may be wire-ORed with any number of open drain or open collector outputs. An open drain output requires the use of a pull-up resistor. Device Address (A0 - A3) The address inputs are used to set the least significant 4 bits of the 8-bit slave address. A match in the slave address serial data stream must be made with the address input in order to initiate communication with the X9438. A maximum of 16 devices may share the same 2-wire serial bus. Potentiometer Pins(1) RH (RH0 - RH1), RL (RL0 - RL1) The RH and RL inputs are equivalent to the terminal con- nections on either end of a mechanical potentiometer. RW (RW0 - RW1) The wiper output is equivalent to the wiper output of a mechanical potentiometer. Amplifier and Device Pins Amplifier Input Voltage VNI(0,1) and VINV(0,1) VNI and VINV are inputs to the noninverting (+) and inverting (-) inputs of the operational amplifiers. Amplifier Output Voltage VOUT(0,1) VOUT is the voltage output pin of the operational amplifier. Hardware Write Protect Input WP The WP pin, when low, prevents non-volatile writes to the wiper counter registers. Note: (1) Alternate designations for RH, RL, RW are VH, VL, VW Analog Supplies V+, V- The analog supplies V+, V- are the supply voltages for the XDCP analog section and the operational amplifiers. System Supply VCC and Ground VSS. The system supply VCC and its reference VSS is used to bias the interface and control circuits. PIN CONFIGURATION PIN NAMES Symbol Description SCL Serial Clock SDA Serial Data A0 - A3 Device Address RH0 - RH1, RL0 - RL1 Potentiometers (terminal equivalent) RW0 - RW1 Potentiometers (wiper equivalent) VNI(0,1), VINV(0,1) Amplifier Input Voltages VOUT0, VOUT1 Amplifier Outputs WP Hardware Write Protection V+,V- Analog and Voltage Amplifier Supplies VCC System/Digital Supply Voltage VSS System Ground NC No Connection VCC RL0 RH0 WP SDA A1 1 2 3 4 5 6 7 8 9 10 24 23 22 21 20 19 18 17 16 15 V+ VOUT0 VNI0 VINV0 A0 NC A3 SCL VINV1 VNI1 SOIC X9438 VSS RW0 14 13 11 12 A2 RL1 RH1 RW1 VOUT1 V- V- VINV0 VNI0 A3 NC SCL 1 2 3 4 5 6 7 8 9 10 24 23 22 21 20 19 18 17 16 15 WR A2 VCC RW0 TSSOP X9438 V+ VOUT0 14 13 11 12 A0 VOUT1 VNI1 VINV1 RL0 RH0 VSS RW1 RH1 RL1 A1 SDA X9438 |
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