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CAT5419YI-10-T2 Datasheet(PDF) 2 Page - ON Semiconductor |
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CAT5419YI-10-T2 Datasheet(HTML) 2 Page - ON Semiconductor |
2 / 15 page CAT5419 http://onsemi.com 2 Figure 1. Functional Diagram SDA SCL A0 A1 A2 A3 NONVOLATILE DATA REGISTERS WIPER CONTROL REGISTERS CONTROL LOGIC 2−WIRE BUS INTERFACE RW0 RW1 RH0 RH1 RL0 RL1 WP PIN DESCRIPTIONS SCL: Serial Clock The CAT5419 serial clock input pin is used to clock all data transfers into or out of the device. SDA: Serial Data The CAT5419 bidirectional serial data pin is used to transfer data into and out of the device. The SDA pin is an open drain output and can be wire-OR’d with the other open drain or open collector outputs. A0, A1, A2, A3: Device Address Inputs These inputs set the device address when addressing multiple devices. A total of sixteen devices can be addressed on a single bus. A match in the slave address must be made with the address input in order to initiate communication with the CAT5419. RH, RL: Resistor End Points The RH and RL pins are equivalent to the terminal connections on a mechanical potentiometer. RW: Wiper The RW pins are equivalent to the wiper terminal of a mechanical potentiometer. WP: Write Protect Input The WP pin when tied low prevents non-volatile writes to the data registers (change of wiper control register is allowed) and when tied high or left floating normal read/write operations are allowed. See page 8, Write Protection for more details. Table 1. PIN CONNECTIONS Pin SOIC Pin TSSOP Name Function 1 19 VCC Supply Voltage 2 20 RL0 Low Reference Terminal for Potentiometer 0 3 21 RH0 High Reference Terminal for Potentiometer 0 4 22 RW0 Wiper Terminal for Potentiometer 0 5 23 A2 Device Address 6 24 WP Write Protection 7 1 SDA Serial Data Input/Output 8 2 A1 Device Address 9 3 RL1 Low Reference Terminal for Potentiometer 1 10 4 RH1 High Reference Terminal for Potentiometer 1 11 5 RW1 Wiper Terminal for Potentiometer 1 12 6 GND Ground 13 7 NC No Connect 14 8 NC No Connect 15 9 NC No Connect 16 10 NC No Connect 17 11 SCL Bus Serial Clock 18 12 A3 Device Address 19 13 NC No Connect 20 14 A0 Device Address, LSB 21 15 NC No Connect 22 16 NC No Connect 23 17 NC No Connect 24 18 NC No Connect |
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