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X9448YV24-2.7 Datasheet(PDF) 2 Page - Intersil Corporation |
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X9448YV24-2.7 Datasheet(HTML) 2 Page - Intersil Corporation |
2 / 19 page 2 FN8201.0 April 18, 2005 PIN DESCRIPTIONS Host Interface Pins Serial Clock (SCL) The SCL input is used to clock data into and out of the X9448. 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 val- ues, refer to the guidelines for calculating typical val- ues 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 X9448. A maximum of 16 devices may share the same 2-wire serial bus. Potentiometer Pins VH (VH0 - VH1), VL (VL0 - VL1) The VH and VL inputs are equivalent to the terminal con- nections on either end of a mechanical potentiometer. VW (VW0 - VW1) The wiper output is equivalent to the wiper output of a mechanical potentiometer and is connected to the inverting input of the voltage comparator. Comparator and Device Pins Voltage Input VNI0, VNI1 VNI0 and VNI1 are the input voltages to the plus (non- inverting) inputs of the two comparators. Buffered Voltage Outputs VOUT0, VOUT1 The VOUT0, and VOUT1 are the buffered voltage comparator outputs enabled by respective bits in the volatile analog control register. Hardware Write Protect Input WP The WP pin when low prevents nonvolatile writes to the wiper counter and analog control registers. Analog Supplies V+, V- The analog supplies V+, V- are the supply voltages for the XDCP analog section and the voltage comparators. 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 VCC VL0 VH0 WP SDA A1 1 2 3 4 5 6 7 8 9 10 24 23 22 21 20 19 18 17 16 V+ VOUT0 VNI0 NC A0 NC A3 SCL NC VNI1 SOIC X9448 VSS VW0 13 11 12 A2 VL1 VH1 VW1 VOUT1 VCC VL1 VH1 WP SDA A2 A3 SCL NC VNI1 TSSOP VSS VW1 A1 VL0 VH0 VW0 V- VOUT1 NC V+ VOUT0 VNI0 A0 NC V- 15 14 1 2 3 4 5 6 7 8 9 10 24 23 22 21 20 19 18 17 16 X9448 13 11 12 15 14 X9448 |
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