STMicroelectronics DSL04-022SC6

Overview

DSL04-022SC6 from STMicroelectronics is a low-capacitance bidirectional TVS diode array designed to protect VDSL2 line drivers in CPE and DSLAM equipment against IEC 61000-4-2 (±15 kV air / ±8 kV contact) and IEC 61000-4-5 (±1 kV, 42 Ω) surges. It features a 22 V reverse standoff voltage (VRM), 25 V minimum breakdown voltage (VBR), 45 A peak pulse current (8/20 µs), 1 pF typical junction capacitance, and 0.2 µA leakage at 25 °C.

For engineers reviewing the DSL04-022SC6 datasheet, DSL04-022SC6 pinout, DSL04-022SC6 application, or DSL04-022SC6 equivalent, key selection criteria include low capacitance for high-speed xDSL signal integrity, robust surge immunity for telecom infrastructure, and SOT23-6L footprint compatibility with space-constrained line interface PCBs.

Technical Context

This device implements a dual-channel, symmetric TVS structure with two independent protection paths (I/O1–+VLD–I/O2 and I/O1––VLD–I/O2), enabling flexible connection of the +VLD and –VLD terminals depending on driver topology-e.g., single-ended or differential line driver configurations. Its low 1 pF capacitance ensures minimal signal distortion up to VDSL2 frequencies (30 MHz).

The device operates across –40 °C to +125 °C junction temperature and withstands 30 kV peak pulse voltage per IEC 61000-4-5, making it suitable for harsh telecom environments where gas-tube-assisted protection may oscillate or degrade. It complies with MIL-STD-883G Class 3 HBM (8 kV) and RoHS-compliant ECOPACK packaging.

Key Specifications

Pinout & Package

SOT23-6L package: 6-terminal surface-mount outline with exposed pad not present; dimensions per DS8922 Rev 3 Table 3 (D = 2.8–3.05 mm, E = 1.5–1.75 mm, e = 0.95 mm pitch); RoHS-compliant, lead-free, UL 94 V0 epoxy.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar TVS diode array applications.

Compared with SP1003-022TGT and SMAJ22A, DSL04-022SC6 uniquely delivers bidirectional, dual-channel protection with sub-1.2 pF capacitance in a 6-pin SOT23 footprint-enabling direct integration into VDSL2 line interface layouts without signal integrity compromise.

Availability

DSL04-022SC6 is available at Aetrix Electronics and suitable for DSLAM line card manufacturing, CPE modem production, and xDSL test equipment development requiring stable component supply and full traceability through STMicroelectronics' qualified distribution chain.

Supply support for DSL04-022SC6 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power ICs, sensors, and protection devices for industrial, automotive, and communications markets.

The DSL04 series belongs to ST's dedicated telecom protection product line, engineered specifically for high-speed xDSL line interfaces where low capacitance, precise clamping, and surge survivability are non-negotiable design requirements.

FAQ

What is the maximum operating temperature for DSL04-022SC6?

The device supports continuous operation from –40 °C to +125 °C junction temperature, validated per Table 1 in DS8922 Rev 3. This range covers industrial ambient conditions in DSLAM cabinets and residential CPE enclosures without derating, provided PCB copper area meets recommended thermal guidelines.

Can +VLD and –VLD pins be left unconnected?

Yes-+VLD and –VLD are internal clamp node connections that may be left floating, grounded, or tied to respective supply rails depending on line driver topology. The datasheet explicitly states "Middle points (–VLD, +VLD) can be either connected or not depending on application requirements," enabling design flexibility without performance penalty.

Does DSL04-022SC6 meet IEC 61000-4-5 Level 2 requirements?

Yes-it is rated for ±1 kV (42 Ω source impedance) per IEC 61000-4-5 Level 2, with a 30 kV peak pulse voltage rating and 15 A peak pulse current handling capability at 8/20 µs waveform, as confirmed in Table 1 of DS8922 Rev 3.

Is the SOT23-6L package compatible with standard reflow profiles?

Yes-the device is qualified for lead-free reflow per IPC/JEDEC J-STD-020, with a maximum soldering temperature of 260 °C for 10 seconds. ST's recommended profile (Figure 12 in DS8922 Rev 3) specifies a 240–245 °C peak for 60–90 seconds, matching standard Class 3 assembly processes.