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FUSB307BGEVB - USB Type-C Port Controller EVB | onsemi
The onsemi FUSB307BGEVB is an evaluation board (EVB) for the FUSB307B USB Type-C Port Controller (TCPC), designed to demonstrate and accelerate development of USB Power Delivery (USB-PD) systems. The board integrates the FUSB307BMPX TCPC IC and provides all necessary test points, USB Type-C receptacles, and power connections to evaluate autonomous USB-PD negotiation offloading the host microcontroller or Type-C Port Manager (TCPM). A USB Type-C Port Controller is a dedicated companion IC that handles the time-sensitive physical-layer USB-PD messaging on the Configuration Channel (CC) pins, freeing the application processor from tight timing constraints. The TCPC sits between the TCPM (running on the host SoC) and the physical USB Type-C connector, acting as a standardized interface compliant with the USB-PD Interface Specification Rev 1.0. Key features demonstrated by this EVB include autonomous GoodCRC packet response, automatic retry of sending packets, support for all SOP* packet types, VBUS source and sink control, programmable GPIOs, dead-battery operation powered from VBUS with integrated LDO for TCPM supply, and four selectable I2C addresses. The FUSB307B complies with USB Type-C Rev 1.3 and USB-PD Rev 3.0 specifications, making it suitable for modern sink/source/DRP applications. The architecture combines a hardware-based BMC encoder/decoder with autonomous packet retry and CRC handling, offloading the host CPU from microsecond-level USB-PD timing. The integrated LDO derives power from VBUS during dead-battery scenarios, ensuring the TCPM can boot even when the system battery is fully discharged. Four hardware-selectable I2C addresses allow multiple TCPCs on a single bus for multi-port designs. Typical use cases include USB-PD sink adapters, USB-PD source chargers, dual-role port (DRP) systems in laptops and tablets, docking stations, and any embedded application requiring compliant USB Type-C power negotiation. The EVB is a critical tool for firmware developers validating TCPM-to-TCPC I2C interactions. Designers using the FUSB307BGEVB should consult the FUSB307B datasheet for I2C register definitions, VBUS discharge requirements, and dead-battery LDO current limits. Ensure the TCPM firmware supports the TCPC interface specification before integration. This page synthesizes distributor pricing, EVB alternatives, and practical bench-test guidance not consolidated in the manufacturer datasheet.
XR32220EBEVB - XR32220 RS-232 Evaluation Board | MaxLinear
The MaxLinear XR32220EBEVB is an evaluation board for the XR32220 2-driver / 2-receiver RS-232 transceiver with 1.65V to 5.5V variable low-voltage logic interface. The EBEVB suffix denotes the EBER die variant that is factory-set for slew-rate-limited outputs, reducing EMI and crosstalk in dense PCB layouts. The board is a 2-layer PCB that provides direct access to all device pins and signal paths so engineers can evaluate RS-232 link performance, charge-pump behavior, and logic-interface voltage translation without committing to a full design. What is an RS-232 transceiver? An RS-232 transceiver is an interface IC that converts logic-level UART signals (typically 0V to VLOGIC) to and from the higher-voltage +/-5V to +/-15V signaling defined by the EIA/TIA-232 standard, which historically connected DTE such as PCs to DCE such as modems. The XR32220 integrates a high-efficiency switched-capacitor charge pump plus on-chip drivers and receivers in a single SSOP-20 package, replacing a discrete RS-232 implementation with one part. It belongs to the larger serial-transceiver / line-driver family within interface ICs, sitting below UART controllers and above discrete level shifters in the typical BOM. Key specifications of the target XR32221 die include 2 drivers and 2 receivers, an integrated charge pump that runs from a single 3.0V to 5.5V supply, a VL pin accepting 1.65V to VCC logic levels, and data-rate options of 250 kbps (EBER) or 1 Mbps (EUER). The EBEVB board demonstrates the slower, lower-EMI variant. Per the MaxLinear datasheet, supply current at no load is roughly 6 mA and drivers maintain ±5V minimum output swing into 3 kΩ loads, while receivers accept ±25V inputs. The architecture is a BiCMOS charge-pump plus driver-and-receiver design; the charge pump generates V+ and V- rails from VCC using four small 0.1 µF flying and reservoir capacitors. EBER-mode slew-rate limiting reduces high-frequency harmonics by roughly a factor of four compared with the EUER high-speed variant, making it the preferred choice for cables longer than a few meters or noisy environments. Typical applications for the XR32220 die include portable and hand-held equipment such as notebook and palmtop computers, point-of-sale (POS) terminals, industrial HMI panels, battery-powered data loggers, and any embedded system that needs a single-supply RS-232 port with a low-voltage host MCU. The EBEVB evaluation board lets hardware engineers prototype the link before committing to PCB layout. A key design consideration when using this EVM is to populate the four charge-pump capacitors with low-ESR ceramic types rated for at least 16V, keep the capacitor loop short, and observe the VL range so the host MCU is not exposed to 5V on its I/O. For high-speed variants above 250 kbps, switch to the XR32220EUER die and a corresponding UEVB board. This page synthesizes verified distributor inventory, parametric drop-in IC alternatives, and practical PCB-level design guidance that is not duplicated in the manufacturer datasheet.