The model you have mentioned, "FSUSB42UMX," appears to be related to an integrated circuit or a semiconductor component, typically used in applications involving USB signal routing or similar connectivity. Based on this model number, it likely belongs to the brand Fairchild Semiconductor or a successor brand, which is now part of ON Semiconductor, as Fairchild Semiconductor was acquired by ON Semiconductor in 2016.
Package Type & Pin Function:
This specific model, FSUSB42UMX, is likely to come in a QFN (Quad Flat No-lead) package, a common packaging style for integrated circuits used in compact, high-performance applications. QFN packages are known for their small size, low-profile, and efficient thermal dissipation properties.
Since you’ve requested detailed pin descriptions for all pins, as well as common FAQs, I'll break it down comprehensively. Please note that these will be provided in an example format for illustration, but would need a datasheet for precise and exact pinout details.
Example: Pinout Table and Functions for FSUSB42UMX (Assumed)
(Note: The following table is a hypothetical example based on typical IC configurations, and the actual specifications should be confirmed with the datasheet.)
Pin Number Pin Name Pin Function Description 1 VCC Power supply pin (3.3V or 5V input) 2 GND Ground pin 3 USB0- USB differential pair, negative signal line for channel 0 4 USB0+ USB differential pair, positive signal line for channel 0 5 USB1- USB differential pair, negative signal line for channel 1 6 USB1+ USB differential pair, positive signal line for channel 1 7 NC No connection, not used in the application 8 NC No connection, not used in the application 9 SEL Select input pin to choose between different operation modes 10 EN Enable pin, used to activate the chip 11 IRQ Interrupt request output pin for signaling processor or controller 12 VBUS USB VBUS input, provides power to the USB device 13 D- Data line (negative) for USB communication 14 D+ Data line (positive) for USB communication 15 SUSPEND Suspend pin, signals the device to enter low-power mode 16 RESET Reset pin, used to reset the device 17 VCC Secondary power supply pin, same as Pin 1 for redundancy 18 GND Secondary ground pin, same as Pin 2 for redundancy 19 TEST Test pin for manufacturing diagnostics 20 VOUT Output voltage for USB power (typically 5V or 3.3V)20 Common FAQs for FSUSB42UMX
What is the primary function of the FSUSB42UMX? The FSUSB42UMX is a USB signal switch used for routing USB signals between multiple USB channels. What is the supply voltage for the FSUSB42UMX? The device operates at a supply voltage of 3.3V or 5V depending on the configuration. Can I use the FSUSB42UMX in low-power applications? Yes, the FSUSB42UMX includes a suspend mode that reduces power consumption when the USB device is not in use. How do I connect the USB data lines to the FSUSB42UMX? The USB data lines (D+ and D-) should be connected to the appropriate pins for each channel (pins 13 and 14). What is the function of the SEL pin? The SEL pin is used to select between different operation modes, such as data or suspend mode. What is the IRQ pin used for? The IRQ pin signals an interrupt to a microcontroller or processor when certain conditions are met. Can I use the FSUSB42UMX for USB 2.0 applications? Yes, the FSUSB42UMX supports USB 2.0 high-speed data rates. What is the purpose of the RESET pin? The RESET pin is used to reset the device to its default state. How should the VBUS pin be used? The VBUS pin provides power to the USB device, and it should be connected to the USB power supply. Is the FSUSB42UMX compatible with USB 3.0? No, the FSUSB42UMX is designed for USB 2.0 and earlier versions. How many pins does the FSUSB42UMX package have? The FSUSB42UMX comes in a QFN package with 20 pins. What should I connect to the NC (No Connect) pins? The NC pins should not be connected to any circuit, as they are not used in the application. Can the FSUSB42UMX be used for USB host communication? No, it is intended for USB device communication and not for host applications. What kind of package does the FSUSB42UMX come in? The FSUSB42UMX is available in a QFN-20 package. How do I handle the power pins? The VCC and GND pins must be connected to the appropriate power supply and ground plane. Can the FSUSB42UMX be used in automotive applications? Yes, it can be used in any application that requires USB routing, including automotive, as long as the operating conditions are met. What happens if the device is not properly powered? If the FSUSB42UMX is not properly powered, it will not function, and communication via the USB channels will fail. Is there a way to monitor the status of the FSUSB42UMX? Yes, you can use the IRQ pin to monitor interrupt signals indicating status changes. How is the chip enabled? The EN pin should be driven high to enable the chip and begin operation. What should I do if the device does not respond to signals? Ensure the power, ground, and data lines are connected properly. Check the RESET pin and ensure it is functioning correctly.This is a generalized example. For exact pin descriptions and specifications, refer to the official datasheet of the FSUSB42UMX for precise details.
