Datenblatt-Suchmaschine für elektronische Bauteile |
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MC20XS4200 Datenblatt(PDF) 5 Page - Freescale Semiconductor, Inc |
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MC20XS4200 Datenblatt(HTML) 5 Page - Freescale Semiconductor, Inc |
5 / 60 page Analog Integrated Circuit Device Data Freescale Semiconductor 5 20XS4200 PIN ASSIGNMENT 11 SCLK Input Serial Clock This input pin is to be connected to an external SPI Clock signal. The SCLK pin is internally connected to a pull-down current source IDWN 12 SI Input Serial Input This input pin receives the SPI input data from an external device (micro- controller or another extreme switch device in case of daisy-chaining). The SI pin is internally connected to a pull-down current source IDWN 13 VDD Power Digital Drain Voltage This is the positive supply pin of the SPI interface. 16 SO Output Serial Output This output pin transmits SPI data to an external device (external micro- controller or the SI pin of the next SPI device in case of daisy-chaining). The pin doesn’t require external pull-up or pull-down resistors, but a series resistor is recommended to limit current consumption in case of GND disconnection 14, 17, 22 GND Ground Ground These pins, internally connected, are the ground pins for the logic - and analog circuitry. It is recommended to also connect these pins on the PCB. 15,18,21 VPWR Power Positive Power Supply These pins, internally connected, supply both the device’s power and control circuitry (except the SPI port). The drain of both internal MOSFET switches is connected to them. Pin 15 is the device’s primary thermal pad. 19 20 HS1 HS0 Output Power Switch Outputs Output pins of the switches, to be connected to the load. 23 SYNC Output Output Current Monitoring Synchronization This output pin is asserted (active low) when the Current Sense (CS) output signal is within the specified accuracy range. Reading the SYNC pin allows the external micro-processor to synchronize to the device when operating in autonomous operating mode. SYNC is open-drain and requires a pull-up resistor to VDD. Table 1. 20XS4200 Pin Description (continued) The function of each pin is described in the section Functional Description Pin Number Pin Name Function Formal Name Definition |
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