NUP3112UPMUTAG - 0.7pF ESD TVS Array 3-Line UDFN-6 | onsemi

USB Port Protection

The NUP3112UPMUTAG fits USB port protection because its 0.7 pF ultra-low line capacitance preserves the impedance and edge rates of the D+ and D- high-speed lines, where capacitance above a few picofarads would degrade the eye diagram and limit data-rate margin. In a typical circuit the array sits directly at the USB connector: the three data lines route through the device to the transceiver, the common-anode node ties to the 5V or 3.3V VCC rail, and the device clamps negative ESD strikes to ground and positive strikes to VCC. The VCC line protection in the same 6-UDFN package also shields the upstream power pin, replacing what would otherwise require multiple discrete diodes. Layout matters: place the device within a few millimeters of the connector with short, wide ground returns so surge current bypasses the sensitive transceiver entirely.

Portable and Wearable Consumer Electronics

Smartphones, tablets, earbuds, and wearable devices expose connector pins to repeated human-touch ESD, and the NUP3112UPMUTAG addresses this environment with a combination the application demands: 0.7 pF capacitance for high-speed lines, a 1.6 x 1.6 mm low-profile UDFN footprint that fits dense board real estate, and low leakage that protects battery life. The three-line plus VCC architecture lets a single package cover a connector's data pair and accessory-detect line simultaneously, cutting placement count and associated assembly cost. According to onsemi, the device provides excellent clamping and fast response, which limits residual voltage at the application processor or transceiver during a discharge event. The unidirectional topology is ideal for fixed-polarity rails, and the low profile suits thin mechanical enclosures where taller packaged arrays cannot fit.

Industrial Communication Interfaces

Industrial serial interfaces such as RS-485, CAN, and fieldbus ports are exposed to cable-borne ESD and surge events from long wiring runs and handling. The NUP3112UPMUTAG protects such exposed lines using its common-anode, unidirectional array: data lines route through the 0.7 pF channels to the transceiver while the anode node references the interface supply, clamping transients before they reach the transceiver die. The fast response and excellent clamping capability cited by onsemi are important because industrial transceivers have finite absolute-maximum ratings that the clamp must hold under repetitive events. Its compact 6-UDFN package allows placement directly at the terminal block or connector side of the board, minimizing the stub length between clamp and protected pin. Designers should verify standoff voltage against the interface supply level in the datasheet before finalizing the BOM.

Notebook and Tablet I/O Protection

Notebook and tablet motherboards concentrate multiple external connectors - USB, audio jacks, docking pins - near board edges where ESD exposure is highest. The NUP3112UPMUTAG serves these nodes with 0.7 pF of capacitance, which is critical for USB 2.0 and faster lines whose signal-integrity budgets cannot tolerate conventional TVS capacitance. One 6-UDFN package protects three independent lines plus VCC, so a single device can cover a USB port's data pair plus ID/accessory line, reducing component count relative to a discrete diode solution. The common-anode design ties transient return current to the supply rail, and the low-leakage spec preserves standby power targets important for always-on mobile platforms. Placement at the connector, with a solid local ground path, ensures the clamping path stays low-inductance under multi-kilovolt discharge events.

Set-Top Box and Networking Equipment

Set-top boxes, routers, and switches present multiple ESD-exposed ports in close proximity, and the NUP3112UPMUTAG fits this environment by combining ultra-low 0.7 pF capacitance for high-speed Ethernet or USB auxiliary lines with a compact 1.6 x 1.6 mm UDFN footprint suited to high-density port clustering. The three-channel common-anode array lets designers protect a data pair plus an auxiliary signal or VCC sense line in one package, maintaining matched clamping between lines of the same interface - a benefit for differential signaling where mismatched capacitance converts common-mode energy into differential noise. onsemi's cited fast response time ensures the clamp engages during the initial nanoseconds of an ESD event, when front-end transceiver damage occurs. Keep the device adjacent to each connector and route surge return current through short ground vias.

Automotive Infotainment Accessory Ports

Automotive head units and telematics modules expose USB and auxiliary connectors to service personnel and consumers, making them frequent ESD failure points. The NUP3112UPMUTAG can protect consumer-facing accessory lines in such systems thanks to its 0.7 pF capacitance, which preserves USB signal integrity, and its unidirectional common-anode topology, which clamps strikes referenced to the vehicle's accessory supply rail. The three-line plus VCC architecture protects both data lines and the 5V charging pin of a USB port within one 1.6 x 1.6 mm package, reducing BOM count on a cost-sensitive board. Note that onsemi's data reviewed here does not state AEC-Q100 qualification for this specific part, so for harsh-environment, safety-relevant automotive nodes designers must confirm qualification status in the current onsemi documentation or select a qualified family member.