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X9258UV24-2.7 Datasheet(PDF) 2 Page - Xicor Inc. |
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X9258UV24-2.7 Datasheet(HTML) 2 Page - Xicor Inc. |
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2 / 22 page  X9258 Characteristics subject to change without notice. 2 of 22 REV 1.1.7 2/4/03 www.xicor.com PIN DESCRIPTIONS Host Interface Pins SERIAL CLOCK (SCL) The SCL input is used to clock data into and out of the X9258. 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 X9258. 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 DCP analog section. PIN CONFIGURATION NC A0 VW3/RW3 V+ VCC VL0/RL0 1 2 3 4 5 6 7 8 9 10 24 23 22 21 20 19 18 17 16 15 A3 SCL VL2/RL2 VH2/RH2 VW2/RW2 V– VSS VW1/RW1 VH1/RH1 VL1/RL1 SOIC/TSSOP X9258 VH3/RH3 14 13 11 12 VL3/RL3 VH0/RH0 VW0/RW0 A2 A1 SDA WP 2 3 4 A B C D E F Top View–Bumps Down RW0 RL0 V+ A0 A3 RL1 VCC RL3 RW3 NC SDA RW1 SCL RL2 WP V- RH0 RH1 RH3 VSS RW2 A2 A1 1 CSP RH2 |
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