onsemi ESDR0544MDMR4G

Overview

ESDR0544MDMR4G from onsemi is a low-capacitance transient voltage suppressor (TVS) designed for ESD protection of high-speed differential data lines including HDMI, DVI, and DisplayPort. It features 0.9 pF max capacitance between I/O and ground, 8 kV HBM ESD rating, 5.0 V reverse working voltage, and Micro-10 flow-through package enabling matched trace routing. Its clamping performance and ultra-low capacitance preserve signal integrity in 1.65–3.3 V interface systems.

For engineers reviewing the ESDR0544MDMR4G datasheet, pinout, applications, or equivalent options, key selection criteria include I/O-to-ground capacitance ≤0.9 pF, IEC 61000-4-2 ±8 kV contact discharge compliance, 5.0 V VRWM matching common interface supply rails, and Micro-10 footprint compatibility with high-density PCB layouts for differential pairs.

Technical Context

This device operates as a unidirectional TVS array with four protected I/O channels and one common GND terminal. Each channel provides bidirectional ESD suppression via integrated silicon avalanche diodes, with junction capacitance measured at 0.3–0.7 pF between I/O pins and 0.7–0.9 pF between I/O and GND at 1 MHz.

The Micro-10 flow-through layout places I/O pins on opposing sides (pins 1–5 and 6–10), supporting symmetrical routing for differential signaling. It is rated for −55 °C to +125 °C operating junction temperature and complies with IEC 61000-4-2 (8 kV contact), HBM Class 3B, and MM Class C standards.

Key Specifications

Pinout & Package

ESDR0544MDMR4G uses the Micro-10 (Case 846B) surface-mount package: 3.0 × 3.0 × 0.95 mm body, 0.5 mm pitch, Pb-free, RoHS-compliant. The flow-through configuration enables straight-line routing for differential pairs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ESD protection applications.

Compared with TPD4E05U06DQAR and SP3204-04UTG, ESDR0544MDMR4G offers integrated four-channel protection in a single Micro-10 flow-through package optimized for differential pair routing, with verified 8 kV IEC 61000-4-2 compliance and UL 94 V-0 flammability rating.

Availability

ESDR0544MDMR4G is available at Aetrix Electronics and suitable for HDMI, DisplayPort, and eSATA interface designs requiring stable component supply, long-term production continuity, and certified ESD immunity.

Supply support for ESDR0544MDMR4G includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

onsemi (formerly ON Semiconductor) is a global semiconductor supplier delivering energy-efficient power, analog, sensor, and logic solutions for automotive, industrial, cloud, and consumer markets.

The ESDR0544MDMR4G belongs to onsemi's transient voltage suppressor product line, engineered specifically for high-speed serial interface ESD protection with emphasis on signal fidelity, layout simplicity, and regulatory compliance.

FAQ

What is the maximum junction capacitance of ESDR0544MDMR4G between I/O pins and ground?

The maximum junction capacitance of ESDR0544MDMR4G between any I/O pin and ground is 0.9 pF at VR = 0 V and f = 1 MHz, as specified in the Electrical Characteristics table. This value ensures minimal signal degradation in high-speed interfaces such as HDMI 2.0 and DisplayPort 1.2a. The typical value is 0.7 pF, making ESDR0544MDMR4G suitable for applications demanding strict capacitance control. This parameter is measured per channel and confirmed across production lots per onsemi's characterization protocol.

Does ESDR0544MDMR4G support IEC 61000-4-2 Level 4 ESD immunity?

Yes, ESDR0544MDMR4G is rated for ±8 kV contact discharge per IEC 61000-4-2, meeting Level 4 requirements. This rating is validated in onsemi's qualification testing and documented in the device's Maximum Ratings table. The ESDR0544MDMR4G achieves this performance using silicon avalanche diode structures with low dynamic resistance, ensuring clamping voltage remains below 12 V during an 8 kV event. System-level compliance also depends on proper PCB layout and grounding per AN8308/D.

What is the pin configuration of ESDR0544MDMR4G and how does it support differential signaling?

ESDR0544MDMR4G uses a 10-pin Micro-10 package with pins 1, 2, 4, 5 assigned as I/O channels, pin 3 as GND, and pins 6–10 as N/C. Its flow-through layout places input and output terminals on opposite sides, enabling straight-line routing for differential pairs like HDMI TMDS lanes. This arrangement minimizes stub length and maintains consistent characteristic impedance - critical for preserving signal integrity above 1 GHz. The GND pin is centrally located to reduce inductance in the return path.

Is ESDR0544MDMR4G compatible with lead-free reflow processes?

Yes, ESDR0544MDMR4G is Pb-free and qualified for standard lead-free reflow soldering with a maximum peak temperature of 260 °C for 10 seconds, as stated in the Maximum Ratings table. Its Micro-10 package meets J-STD-020 moisture sensitivity level 1 (MSL-1), eliminating bake requirements prior to assembly. The device passes thermal cycling and intermetallic growth validation per JEDEC standards, ensuring reliability in high-volume SMT production environments using SAC305 or similar alloys.

What is the reverse working voltage (VRWM) specification for ESDR0544MDMR4G and why is it important?

The reverse working voltage (VRWM) of ESDR0544MDMR4G is 5.0 V, meaning it remains non-conductive up to this DC or continuous peak voltage. This value matches the nominal supply voltage of HDMI, DVI, and DisplayPort I/O buffers, preventing leakage current or false triggering during normal operation. Selecting a VRWM ≥ interface supply avoids unnecessary power loss or signal distortion while retaining sufficient margin below breakdown (6.0 V min). It is a key parameter for ensuring reliable protection without functional interference.