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X9408WV24 Datasheet(PDF) 3 Page - Intersil Corporation |
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X9408WV24 Datasheet(HTML) 3 Page - Intersil Corporation |
3 / 20 page 3 FN8191.4 January 15, 2009 Pin Descriptions Host Interface Pins SERIAL CLOCK (SCL) The SCL input is used to clock data into and out of the X9408. 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 X9408. A maximum of 16 devices may occupy the 2-wire serial bus. Potentiometer Pins VH/RH (VH0/RH0 - VH3/RH3), VL/RL (VL0/RL0 - VL3/RL3) The VH/RH and VL/RL inputs are equivalent to the terminal connections on either end of a mechanical potentiometer. VW/RW (VW0/RW0 – VW3/RW3) 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 Assignments Pinouts X9408 (24 LD DIP/SOIC) TOP VIEW X9408 (24 LD TSSOP) TOP VIEW SYMBOL DESCRIPTION SCL Serial Clock SDA Serial Data A0-A3 Device Address VH0/RH0 - VH3/RH3, VL0/RL0 - VL3/RL3 Potentiometer Pins (terminal equivalent) VW0/RW0 - VW3/RW3 Potentiometer Pins (wiper equivalent) WP Hardware Write Protection V+,V- Analog Supplies VCC System Supply Voltage VSS System Ground NC No Connection 1 2 3 4 5 6 7 8 9 10 11 12 VCC VL0/RL0 VH0/RH0 VW0/RW0 A2 WP SDA A1 VL1/RL1 VH1/RH1 VW1/RW1 VSS 16 17 18 19 20 21 22 23 24 15 14 13 V+ VH3/RH3 VW3/R/RH1 A0 NC SCL VH2/RH2 VW2/RW2 V- VL3/RL3 A3 VL2/RL2 1 2 3 4 5 6 7 8 9 10 11 12 SDA A1 VL1/RL1 VH1/RH1 VW1/RW1 VSS V- VW2/RW2 VH2/RH2 VL2/RL2 SCL A3 16 17 18 19 20 21 22 23 24 15 14 13 WP VW0/RW0 VH0/RH0 VL0/RL0 VCC VL3/RL3 VW3/RW3 A0 NC A2 V+ VH3/RH3 X9408 |
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