Diodes Incorporated PI3A27518Q2ZDWEX

Overview

PI3A27518Q2ZDWEX from Diodes Incorporated is a 6-channel, 2:1 analog multiplexer/demultiplexer with break-before-make switching, 5Ω on-resistance at 3.3V, 380MHz signal bandwidth, and AEC-Q100 Grade 2 qualification (–40°C to +105°C) for automotive ADAS and high-speed interface routing in SD/SDIO, MMC, and qSPI systems.

For engineers reviewing the PI3A27518Q2ZDWEX datasheet, PI3A27518Q2ZDWEX pinout, PI3A27518Q2ZDWEX application, or PI3A27518Q2ZDWEX equivalent, this device supports rail-to-rail analog signal switching across 1.65V–3.6V supply, delivers –66dB off-isolation at 10MHz, and enables low-distortion, low-latency channel selection in safety-critical automotive and embedded memory interfaces.

Technical Context

The PI3A27518Q2ZDWEX implements a CMOS-based 6-channel bidirectional analog switch architecture with dual select inputs (IN1, IN2) and active-low enable (EN̅), supporting four configurable connection modes per channel (NC/NO/COM routing). Its break-before-make timing ensures no signal shorting during state transitions.

Each channel features matched on-resistance flatness (<2.3Ω over full signal range at 3.3V), <0.8Ω inter-channel R_ON mismatch, and <0.47pC charge injection - enabling precision analog signal routing without DC offset or transient glitches in high-fidelity data paths.

Key Specifications

Pinout & Package

Package: 24-pin, 4mm × 4mm wettable flank VQFN (ZDW) - RoHS-compliant, halogen-free, and optimized for automated optical inspection (AOI) and solder joint reliability in automotive PCB assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar analog multiplexer applications.

Compared with TS3USB30E and TMUX1574, the PI3A27518Q2ZDWEX uniquely combines 6-channel count, NC/NO dual-path configurability, guaranteed break-before-make timing, and AEC-Q100 Grade 2 operation - making it the sole option for automotive SDIO/qSPI redundancy and ADAS sensor aggregation where channel count, safety timing, and extended temperature are mandatory.

Availability

PI3A27518Q2ZDWEX is available at Aetrix Electronics and suitable for automotive ADAS domain controllers, infotainment SDIO routing, and qSPI flash redundancy requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.

Supply support for PI3A27518Q2ZDWEX 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

Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and consumer markets, with design centers across Asia, Europe, and the U.S.

The PI3A27518Q2ZDWEX belongs to Diodes' Pericom-branded high-speed analog switch product line, engineered specifically for automotive-grade signal routing in memory interfaces, camera links, and safety-critical data paths.

FAQ

What is the maximum signal frequency supported by the PI3A27518Q2ZDWEX?

The PI3A27518Q2ZDWEX supports a 3dB bandwidth of 380MHz, verified at 50Ω load and 3.3V supply. This enables reliable operation with qSPI clocks up to 100MHz and SDIO signals compliant with UHS-I SDR104 (208MB/s), provided PCB layout maintains controlled impedance and minimizes stub length.

Does the PI3A27518Q2ZDWEX require external pull-up or pull-down resistors on its control pins?

No external biasing is required: IN1, IN2, and EN̅ have CMOS-compatible input thresholds (V_IL ≤ 0.2V_DD, V_IH ≥ 0.8V_DD) and ≤2.5μA leakage. Direct connection to FPGA/GPIO outputs meeting 1.8V/3.3V logic levels is sufficient; floating inputs must be avoided per datasheet absolute maximum ratings.

Can the PI3A27518Q2ZDWEX operate with 1.8V and 3.3V supplies simultaneously on different channels?

No - V_DD is a single-supply pin powering all six channels. The device operates across 1.65V–3.6V, but all channels share the same rail. Mixed-voltage routing requires external level shifters on signal paths; the switch itself does not translate logic or analog levels between domains.

How is break-before-make timing enforced in the PI3A27518Q2ZDWEX?

Break-before-make is implemented internally via analog timing circuitry that delays NO/NC turn-on until COM disconnect is complete. Measured t_D is 4.0–20.0ns at 3.3V, independent of external control slew rate - ensuring no overlap even with slow GPIO edges or noisy supply conditions.