Toshiba Semiconductor and Storage DF5A6.8CFU(TE85L,F

Overview

DF5A6.8CFU from TOSHIBA is a quad-channel ESD protection diode array designed for high-speed data lines, featuring 6.8 V nominal Zener voltage, 23 pF typical terminal capacitance, ±25 kV IEC61000-4-2 contact discharge immunity, and ultra-compact 5-pin SOT-353 (1-2V1B) package-used in USB 2.0, HDMI, and audio interface protection.

For engineers reviewing the DF5A6.8CFU datasheet, DF5A6.8CFU pinout, DF5A6.8CFU application, or DF5A6.8CFU equivalent, key selection criteria include low-capacitance signal integrity preservation, multi-line ESD clamping capability, strict compliance with IEC61000-4-2 Level 4, and suitability for space-constrained portable electronics layouts.

Technical Context

The DF5A6.8CFU integrates four independent Zener-type ESD protection elements in a single monolithic chip, each with cathode-anode configuration and shared anode connection (Pin 2). It operates exclusively as a transient voltage suppressor-not as a voltage regulator-requiring no bias current during normal operation and triggering only during ESD events exceeding its 6.8 V breakdown threshold.

Its 23 pF terminal capacitance (measured at VR = 0 V, f = 1 MHz) ensures minimal signal distortion on high-frequency interfaces up to 480 Mbps, while the ±25 kV IEC61000-4-2 rating confirms robustness against real-world electrostatic discharge without device damage under specified test conditions.

Key Specifications

Pinout & Package

DF5A6.8CFU uses the JEITA-standardized 5-pin SOT-353 package (TOSHIBA designation: 1-2V1B), measuring 2.1 × 1.25 × 0.9 mm, with gull-wing leads and exposed pad not present. Pin 2 serves as common anode; Pins 1, 3, 4, and 5 are individual cathodes for four independent protection channels.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DF5A6.8CFU, ESD9X5.0ST5G offers lower capacitance but increases layout complexity and assembly cost for quad-line protection; no verified pin-compatible or functional drop-in replacement exists among mainstream alternatives-DF5A6.8CFU remains uniquely optimized for integrated, low-capacitance, four-line ESD suppression in SOT-353.

Availability

DF5A6.8CFU is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI control line safeguarding, and smartphone audio jack ESD mitigation requiring stable component supply across high-mix consumer electronics production.

Supply support for DF5A6.8CFU 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 designs and manufactures discrete semiconductors, power devices, and logic ICs with emphasis on efficiency, miniaturization, and reliability for consumer, industrial, and automotive systems.

The DF5A6.8CFU belongs to Toshiba's DF-series ESD protection diode family, engineered specifically for ultra-low-capacitance, multi-line transient suppression in space-constrained portable electronics-prioritizing signal fidelity and certified ESD immunity over general-purpose regulation.

FAQ

Is DF5A6.8CFU suitable for use as a voltage reference or Zener regulator?

No. The DF5A6.8CFU is explicitly designated by Toshiba for ESD protection only. Its electrical characteristics-including dynamic impedance and leakage-are optimized for transient clamping, not stable DC regulation. Using DF5A6.8CFU as a voltage reference risks premature failure and violates Toshiba's stated restriction on usage. Always refer to dedicated Zener diodes like TZM series for regulation tasks.

What is the maximum data rate supported by DF5A6.8CFU without signal integrity loss?

DF5A6.8CFU supports data rates up to 480 Mbps, as validated by its 23 pF terminal capacitance measured at 1 MHz and low dynamic impedance (<25 Ω). This makes DF5A6.8CFU compatible with USB 2.0 full-speed operation. Signal integrity testing must be performed in the final PCB layout, but DF5A6.8CFU's capacitance profile is intentionally designed to avoid measurable jitter or rise-time degradation at this rate.

Does DF5A6.8CFU require external biasing or current-limiting resistors?

No. DF5A6.8CFU operates passively and requires no external biasing, current-limiting resistors, or control signals. It functions solely as a voltage-triggered clamp: conducting only during ESD transients exceeding ~6.8 V. During normal operation (VR ≤ 5 V), DF5A6.8CFU draws ≤0.5 μA reverse current-fully compatible with high-impedance I/O pins and open-drain buses.

Can DF5A6.8CFU replace a single-channel ESD diode in a design?

Yes-but only if the design routes all four protected lines to share a common return (Pin 2 anode). DF5A6.8CFU is not a drop-in replacement for single-channel devices like DF2S7.0F; it consolidates four channels into one package. Replacing a single diode with DF5A6.8CFU requires redesigning the PCB to allocate four signal lines and a shared anode net-offering BOM reduction only when protecting ≥3 lines simultaneously.

What is the lead finish and RoHS status of DF5A6.8CFU?

DF5A6.8CFU features matte tin (Sn) lead finish and is RoHS-compliant per EU Directive 2011/65/EU, with lead content <1000 ppm. Toshiba confirms compliance in its official environmental documentation dated 2026-04-07. No exemptions apply, and the device is also compliant with JEDEC J-STD-609A Class 1 marking for lead-free identification.