PACUSB-D1YB5R

Overview

The PACUSB-D1YB5R is a single-channel USB downstream port terminator, EMI filter, and transient over-voltage protector manufactured by onsemi. It integrates an EMI/RFI filter network with a 33 Ω series resistor (R1) and 15 kΩ pull-down resistors (R2) to ground for both D+ and D- data lines. The device provides high-level electrostatic discharge protection, rated at +20 kV contact discharge per MIL-STD-883D Method 3015 and +15 kV per IEC 61000-4-2. It operates within a temperature range of -40°C to +85°C and is housed in a compact SC70-5 surface-mounted package.

Feature Summary

• Integrates USB specification-recommended EMI/RFI filtering components alongside required pull-down resistors
• Provides robust electrostatic discharge protection exceeding international standards for sensitive electronic components
• Designed to minimize transmission line reflections by matching the characteristic impedance of standard USB cables

Applications

• ESD protection and termination of USB downstream ports
• Desktop PCs
• Notebooks
• Set-top boxes
• USB hubs

Procurement Notes

Verify that the specific ordering suffix 'YB' corresponds to the SC70-5 package variant as documented in the official datasheet. Confirm lead-free finishing availability if required by environmental compliance standards. Ensure the selected component matches the intended series resistance value of 33 ohms for proper signal integrity.

Selection Notes

Select this component when a compact solution is needed to terminate USB downstream ports while providing integrated EMI suppression and ESD protection. The 33 ohm series resistance option is suitable for applications requiring specific impedance matching characteristics. Verify compatibility with existing PCB footprint constraints for the SC70-5 package before finalizing the design.

Part Context

This part belongs to the PACUSB-D1/D2/D3 family of USB downstream port terminators. The family offers different series resistance values (15, 22, and 33 ohms) and package options including SOT23-5 and SC70-5. The PACUSB-D1YB5R specifically denotes the 33 ohm variant in the smaller SC70-5 package with lead-free finish.

Replacement Considerations

The datasheet notes pin-compatibility with ST Microelectronics USBDFxxW5 USB Downstream Port Terminator devices. Verify electrical parameters and physical dimensions match before substitution.