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MCP4441 数据表(PDF) 39 Page - Microchip Technology |
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MCP4441 数据表(HTML) 39 Page - Microchip Technology |
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39 / 100 page ![]() © 2010 Microchip Technology Inc. DS22265A-page 39 MCP444X/446X 3.0 PIN DESCRIPTIONS The descriptions of the pins are listed in Table 3-1. Additional descriptions of the device pins follows. TABLE 3-1: PINOUT DESCRIPTION FOR THE MCP444X/446X Pin Weak Pull-up/ down (Note 1) Standard Function TSSOP QFN Symbol I/O Buffer Type 14L 20L 20L —1 19 P3A A Analog No Potentiometer 3 Terminal A 12 20 P3W A Analog No Potentiometer 3 Wiper Terminal 23 1 P3B A Analog No Potentiometer 3 Terminal B 34 2 HVC/A0 I HV w/ST “smart” High Voltage Command / I2C Address 0 45 3 SCL I HV w/ST No I2C Clock Input 56 4 SDA I HV w/ST No I2C Serial Data I/O. Open Drain output 67 5 VSS —P — Ground 78 6 P1B A Analog No Potentiometer 1 Terminal B 89 7 P1W A Analog No Potentiometer 1 Wiper Terminal —10 8 P1A A Analog No Potentiometer 1 Terminal A —11 9 P0A A Analog No Potentiometer 0 Terminal A 912 10 P0W A Analog No Potentiometer 0 Wiper Terminal 10 13 11 P0B A Analog No Potentiometer 0 Terminal B —14 12 WP I HV w/ST “smart” Hardware EEPROM Write Protect —15 13 RESET I HV w/ST Yes Hardware Reset Pin 11 16 14 A1 I HV w/ST “smart” I2C Address 1 12 17 15 VDD —P — Positive Power Supply Input 13 18 16 P2B A Analog No Potentiometer 2 Terminal B 14 19 17 P2W A Analog No Potentiometer 2 Wiper Terminal —20 18 P2A A Analog No Potentiometer 2 Terminal A —— 21 EP — — — Exposed Pad. (Note 2) Legend: HV w/ST = High Voltage tolerant input (with Schmidtt trigger input) A = Analog pins (Potentiometer terminals) I = digital input (high Z) O = digital output I/O = Input / Output P = Power Note 1: The pin’s “smart” pull-up shuts off while the pin is forced low. This is done to reduce the standby and shut-down current. 2: The QFN package has a contact on the bottom of the package. This contact is conductively connected to the die substrate, and therefore should be unconnected or connected to the same ground as the device’s VSS pin. |
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