Toshiba Semiconductor and Storage DF2S6.8ASL,L3F

Overview

DF2S6.8ASL,L3F from Toshiba Electronic Devices & Storage Corporation is a silicon epitaxial planar ESD protection diode designed for bidirectional transient voltage suppression in high-speed data lines. It features a working peak reverse voltage of 5 V, ±30 kV IEC61000-4-2 contact ESD rating, and clamps to 11 V at 1 A peak pulse current. It is used in USB 2.0, HDMI, and audio jack interfaces to safeguard sensitive ICs from electrostatic discharge.

For engineers reviewing the DF2S6.8ASL,L3F datasheet, DF2S6.8ASL,L3F pinout, DF2S6.8ASL,L3F application, or DF2S6.8ASL,L3F equivalent, key selection criteria include clamp voltage at specified IPP, dynamic impedance, total capacitance under bias, and SL2 package compatibility with high-density PCB layouts.

Technical Context

The DF2S6.8ASL,L3F implements a Zener-based bidirectional clamping structure optimized for low-capacitance signal line protection. Its design targets fast response to sub-nanosecond ESD transients while maintaining <25 pF capacitance at 0 V - critical for preserving signal integrity in 480 Mbps USB 2.0 channels.

It operates as a two-terminal device with symmetrical anode-cathode configuration (Pin 1 = Cathode, Pin 2 = Anode), enabling placement across differential or single-ended lines without polarity constraints. The SL2 package supports reflow-compatible mounting and thermal dissipation up to 150°C junction temperature.

Key Specifications

Pinout & Package

DF2S6.8ASL,L3F is housed in the SL2 package (TOSHIBA designation: 1-1AL1A), a 2-pin ultra-small surface-mount device measuring 1.0 × 0.6 × 0.35 mm with 0.2 mg typical weight. The package uses a silicon epitaxial planar die construction and is compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NUP4105MR6T1G and ESDBLE5.0D1W, DF2S6.8ASL,L3F delivers superior ESD immunity (±30 kV) with matched low capacitance - making it optimal for high-speed, single-line interfaces where both signal fidelity and ruggedness are mandatory.

Availability

DF2S6.8ASL,L3F is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI control channel safeguarding, and smartphone audio jack ESD mitigation requiring stable component supply and long-term lifecycle support.

Supply support for DF2S6.8ASL,L3F 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

Toshiba Electronic Devices & Storage Corporation is a Japanese semiconductor manufacturer specializing in discrete devices, power electronics, and storage solutions, with global distribution and automotive-grade reliability validation.

The DF2S6.8ASL,L3F belongs to Toshiba's DF2S series of ultra-low-capacitance ESD suppressors, engineered specifically for high-speed digital interfaces where signal integrity and compact form factor are critical.

FAQ

What is the primary function of the DF2S6.8ASL,L3F in circuit protection?

The DF2S6.8ASL,L3F functions as a bidirectional ESD protection diode that clamps transient voltages on signal lines to safe levels during electrostatic discharge events. It operates by entering avalanche breakdown at ~6.8 V, limiting voltage across protected ICs to ≤11 V at 1 A surge current. Its role is strictly for ESD suppression - not voltage regulation or overvoltage shutdown - and it must be placed within 2 mm of the protected connector per IEC61000-4-2 layout guidelines.

Does the DF2S6.8ASL,L3F support unidirectional or bidirectional signal paths?

The DF2S6.8ASL,L3F supports bidirectional signal paths due to its symmetrical Zener structure and identical anode/cathode electrical characteristics. This allows it to protect AC-coupled lines like USB D+/D− or HDMI TMDS pairs without regard to signal polarity or DC bias direction. Its SL2 package has no polarity marking, confirming its intended use in either orientation across a signal line and ground.

What is the significance of the 25 pF total capacitance specification for DF2S6.8ASL,L3F?

The 25 pF total capacitance (measured at 0 V, 1 MHz) is critical for maintaining signal integrity in high-speed interfaces. For example, in USB 2.0 (480 Mbps), this value introduces negligible rise-time degradation (<100 ps added delay) and preserves eye diagram opening. Higher capacitance would attenuate high-frequency harmonics and cause bit errors; DF2S6.8ASL,L3F's 25 pF strikes a verified balance between ESD robustness and bandwidth preservation.

Can DF2S6.8ASL,L3F be used in place of a TVS diode for surge protection?

No - DF2S6.8ASL,L3F is qualified only for ESD transients (IEC61000-4-2) and short-duration surges (IEC61000-4-5, 8/20 µs), not sustained overvoltage or lightning-induced surges. Its 2.5 W peak pulse power rating and 150°C max junction temperature are insufficient for multi-millisecond AC line surges. For such applications, dedicated high-energy TVS diodes like SMAJ5.0A should be used instead of DF2S6.8ASL,L3F.

Is the SL2 package of DF2S6.8ASL,L3F compatible with standard pick-and-place equipment?

Yes - the SL2 package (1.0 × 0.6 × 0.35 mm, 0.2 mg weight) is designed for compatibility with industry-standard 0201-class pick-and-place systems. Its flat, symmetrical geometry and solderable terminations meet IPC-7351B land pattern recommendations. Reflow profiles follow J-STD-020 moisture sensitivity level 1, requiring no baking prior to assembly, and the device withstands peak temperatures up to 260°C for 10 seconds.