Diodes Incorporated PI3C3384QE

Overview

PI3C3384QE from Pericom Semiconductor is a 2.5V/3.3V, 10-bit, 2-port bus switch with near-zero propagation delay (0.25 ns), 5 Ω typical on-resistance, and 400+ MHz bandwidth, used for high-speed data path switching in hot-insertion-capable backplane and docking interfaces.

For engineers reviewing the PI3C3384QE datasheet, PI3C3384QE pinout, PI3C3384QE application, or PI3C3384QE equivalent, key selection criteria include rail-to-rail 2.5V/3.3V operation, 5V I/O tolerance, dual independent bus enable control (BEA/BEB), and QSOP-24 packaging for space-constrained board layouts.

Technical Context

The PI3C3384QE implements two independent 5-bit switch banks (A0–A4/B0–B4 and A5–A9/B5–B9), each controlled by separate active-low BEA and BEB signals, enabling selective connection of either bus segment or full 10-bit pass-through. Its CMOS transmission-gate architecture ensures no added logic delay beyond RC time constant (≤0.25 ns @ 50 pF).

It supports hot insertion via controlled power-up sequencing, 5V-tolerant I/Os, and rail-to-rail analog switching across 2.5V or 3.3V supply rails. Quiescent current is 260–500 µA, and output drive capability is rated to ±120 mA per pin under DC conditions.

Key Specifications

Pinout & Package

PI3C3384QE is housed in a Pb-free, green-compliant 24-pin QSOP package (150-mil width), with 0.635 mm lead pitch and JEDEC MO-137B/AE compliant footprint.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bus switching applications.

Compared with PI3C3384QE, PI3C3245QE offers reduced channel count and simplified control but lacks dual-enable flexibility, while SN74CBT3245APW trades voltage versatility and hot-insertion robustness for broader distributor availability in standard logic families.

Availability

PI3C3384QE is available at Aetrix Electronics and suitable for PCI Express slot switching, hot-swappable docking stations, and industrial backplane data routing requiring stable component supply and long-term lifecycle assurance.

Supply support for PI3C3384QE 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

Pericom Semiconductor was a fabless provider specializing in high-speed interface, timing, and signal-integrity solutions before its acquisition by Diodes Incorporated in 2016.

The PI3C3384QE belongs to Pericom's high-bandwidth bus switch product line, designed specifically for low-latency, hot-insertion-capable data path isolation in computing and docking infrastructure.

FAQ

What is the maximum operating frequency supported by PI3C3384QE?

The PI3C3384QE is characterized for >400 MHz bandwidth, supporting NRZ data rates up to approximately 1.6 Gbps. This is validated by its 5 Ω on-resistance and 10 pF on-capacitance, yielding an RC time constant well below 0.25 ns under 50 pF load conditions.

Can PI3C3384QE operate with a 2.5V supply while interfacing to 5V logic?

Yes. The device supports 2.5V or 3.3V VCC operation and features 5V-tolerant I/Os on all A and B pins. Inputs and outputs function correctly at 0–5V swing regardless of supply voltage, eliminating need for external level shifters in mixed-voltage systems.

How does the dual bus enable (BEA/BEB) improve hot-insertion reliability?

BEA and BEB allow independent control of upper and lower 5-bit segments, enabling staged bus engagement during hot insertion. This prevents simultaneous switching transients across all 10 bits, reducing ground bounce and supply droop that could destabilize adjacent circuits during live card mating.

Is PI3C3384QE pin-compatible with earlier Pericom bus switches like PI3C3383?

No. PI3C3383 is a 24-pin 8-bit switch with different pin assignment (single BE, no BEB), whereas PI3C3384QE uses BEA/BEB and splits A/B signals across both sides of the QSOP-24 package. Pin mapping differs significantly-direct replacement requires PCB redesign.