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X9418 Datasheet(PDF) 2 Page - Intersil Corporation |
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X9418 Datasheet(HTML) 2 Page - Intersil Corporation |
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2 / 21 page  2 FN8194.0 March 7, 2005 PIN DESCRIPTIONS Host Interface Pins Serial Clock (SCL) The SCL input is used to clock data into and out of the X9418. 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. For selecting typical values, refer to the guidelines for calculating typical values on the bus pull-up resistors graph. 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 X9418. A maximum of 16 devices may occupy the 2-wire serial bus. Potentiometer Pins VH/RH (VH0/RH0 - VH1/RH1), VL/RL (VL0/RL0 - VL1/RL1) The VH/RH and VL/RL inputs are equivalent to the terminal connections on either end of a mechanical potentiometer. VW/RW (VW0/RW0 - VW1/RW1) The wiper outputs are equivalent to the wiper output of a mechanical potentiometer. Hardware Write Protect Input (WP) The WP pin when low prevents nonvolatile writes to the Data Registers. Analog Supplies V+, V- The Analog Supplies V+, V- are the supply voltages for the XDCP analog section. PIN CONFIGURATION PIN NAMES Symbol Description SCL Serial Clock SDA Serial Data A0 - A3 Device Address VH0/RH0 - VH1/RH1, VL0/RL0 - VL1/RL1 Potentiometer Pins (terminal equivalent) VW0/RW0 - VW1/RW1 Potentiometer Pins (wiper equivalent) WP Hardware Write Protection V+,V- Analog Supplies VCC System Supply Voltage VSS System Ground NC No Connection VCC RL0/VL0 RH0/VH0 WP SDA A1 1 2 3 4 5 6 7 8 9 10 24 23 22 21 20 19 18 17 16 5 V+ NC NC NC A0 NC A3 SCL NC NC DIP/SOIC X9418 VSS RW0/VW0 14 13 11 12 A2 RL1/VL1 RH1/VH1 RW1/VW1 NC V- SDA A1 RL1/VL1 VSS NC NC 1 2 3 4 5 6 7 8 9 10 24 23 22 21 20 19 18 17 16 15 WP A2 VW0/RW0 VH0/RH0 VL0/RL0 VCC NC NC NC V+ X9418 A3 RH1/VH1 14 13 11 12 RW1/VW1 NC V- SCL A0 NC TSSOP X9418 |
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Similar Description - X9418 |
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