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CAT5269UI-25TE13 Datasheet(PDF) 2 Page - Catalyst Semiconductor |
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CAT5269UI-25TE13 Datasheet(HTML) 2 Page - Catalyst Semiconductor |
2 / 18 page 2 CAT5419 Document No. 2115, Rev. F PIN DESCRIPTION Pin Pin Pin (TSSOP) (SOIC) (BGA) Name Function 19 1 C1 VCC Supply Voltage 20 2 B1 RL0 Low Reference Terminal for Potentiometer 0 21 3 C2 RH0 High Reference Terminal for Potentiometer 0 22 4 A1 RW0 Wiper Terminal for Potentiometer 0 23 5 A2 A2 Device Address 24 6 B2 WP Write Protection 1 7 B3 SDA Serial Data Input/Output 2 8 A3 A1 Device Address 39 A4 RL1 Low Reference Terminal for Potentiometer 1 410 C3 RH1 High Reference Terminal for Potentiometer 1 511 B4 RW1 Wiper Terminal for Potentiometer 1 6 12 C4 GND Ground 7 13 D4 NC No Connect 8 14 E4 NC No Connect 9 15 D3 NC No Connect 10 16 F4 NC No Connect 11 17 F3 SCL Bus Serial Clock 12 18 E3 A3 Device Address 13 19 D1 NC No Connect 14 20 F2 A0 Device Address, LSB 15 21 F1 NC No Connect 16 22 D2 NC No Connect 17 23 E1 NC No Connect 18 24 E2 NC No Connect 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 7, Write Protection for more details. DEVICE OPERATION The CAT5419 is two resistor arrays integrated with 2- wire serial interface logic, four 6-bit wiper control registers and sixteen 6-bit, non-volatile memory data registers. Each resistor array contains 63 separate resistive elements connected in series. The physical ends of each array are equivalent to the fixed terminals of a mechanical potentiometer (RH and RL). RH and RL are symmetrical and may be interchanged. The tap positions between and at the ends of the series resistors are connected to the output wiper terminals (RW) by a CMOS transistor switch. Only one tap point for each potentiometer is connected to its wiper terminal at a time and is determined by the value of the wiper control register. Data can be read or written to the wiper control registers or the non-volatile memory data registers via the 2-wire bus. Additional instructions allow data to be transferred between the wiper control registers and each respective potentiometer's non-volatile data registers. Also, the device can be instructed to operate in an "increment/decrement" mode. |
Número de pieza similar - CAT5269UI-25TE13 |
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Descripción similar - CAT5269UI-25TE13 |
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