Diodes Incorporated PI3C3306UEX

Overview

PI3C3306UEX from Diodes Incorporated is a 2-bit, 2-port bus switch with individual active-LOW enables, operating at 2.5V or 3.3V supply, featuring 5Ω on-resistance, <0.25ns propagation delay, and >400MHz bandwidth for high-speed signal routing in PCIe, USB, and DDR interconnects.

For engineers reviewing the PI3C3306UEX datasheet, PI3C3306UEX pinout, PI3C3306UEX application, or PI3C3306UEX equivalent, key selection criteria include rail-to-rail 3.3V/2.5V switching, 5V I/O tolerance, hot-insertion support, and low ground-bounce noise in compact MSOP-8 packaging.

Technical Context

The PI3C3306UEX implements two independent analog switches controlled by separate active-LOW BE pins, enabling precise per-channel signal gating without propagation delay addition beyond RC time constant (≤0.25ns @ 50pF). Each switch connects A1↔B1 and A2↔B2 bidirectionally with no directionality constraint.

It supports mixed-voltage operation: logic inputs tolerate up to 5V regardless of VCC (2.5V or 3.3V), and output voltage tracks input rail-to-rail. Power sequencing requires VCC application before control or data signals to prevent latch-up.

Key Specifications

Pinout & Package

PI3C3306UEX is housed in an 8-pin Mini Small Outline Package (MSOP-U), 3.0mm × 3.0mm body, 0.65mm pitch, with exposed pad for thermal enhancement (JEDEC MO-187 variant).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBT3244DBQR and PI3CH4812LEX, PI3C3306UEX uniquely balances per-channel active-LOW control, 5V I/O tolerance, and proven 400MHz performance in MSOP-8 - making it optimal for mixed-voltage, dynamically reconfigurable interconnects where enable sequencing and robustness are critical.

Availability

PI3C3306UEX is available at Aetrix Electronics and suitable for PCIe lane routing, USB 2.0 switching, and DDR bus isolation requiring stable component supply across industrial, telecom, and embedded computing programs.

Supply support for PI3C3306UEX 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 manufacturer of discrete semiconductors and integrated circuits, specializing in high-performance analog, logic, and protection devices for industrial, computing, and communications markets.

The PI3C3306UEX belongs to Diodes' Pericom® high-speed logic portfolio, engineered specifically for low-latency, low-noise signal routing in next-generation serial interconnects and hot-pluggable systems.

FAQ

What is the maximum recommended load capacitance for maintaining <0.25ns propagation delay?

The datasheet specifies that the 0.25ns propagation delay value is characterized with CL = 50pF and RL = 500Ω. For loads exceeding 50pF, the RC time constant increases linearly with capacitance; at 100pF, expected delay rises to ~0.5ns. Maintain trace impedance and minimize stub length to avoid exceeding this limit in high-speed layouts.

Can PI3C3306UEX operate with VCC = 2.5V while interfacing to 3.3V logic signals?

Yes - its 5V-tolerant inputs allow A1, A2, B1, and B2 pins to accept 0–3.3V signals even when VCC = 2.5V. The output swing remains rail-to-rail (0–2.5V), so level translation occurs inherently. No external resistors or clamps are needed for this use case.

Is the MSOP-8 package (U) thermally equivalent to the TSSOP-8 (L) version?

No - the MSOP-8 (U) has higher thermal resistance (θJA ≈ 190°C/W vs. 160°C/W for TSSOP-8) due to smaller body size and reduced copper exposure. For continuous 120mA per channel operation, derate power dissipation by 20% or add thermal vias under the exposed pad to match TSSOP thermal performance.

How does the active-LOW enable affect power-up behavior in hot-insertion systems?

With BE1/BE2 pulled HIGH by default (e.g., via 10kΩ resistors to VCC), both switches remain OFF at power-up, preventing bus contention. This ensures all A/B ports stay in high-impedance state until firmware asserts LOW on the desired BE pin - satisfying JEDEC hot-plug initialization requirements.