Diodes Incorporated PI3C3305UE

Overview

PI3C3305UE from Diodes Incorporated is a 2-bit, 2-port bus switch with individual active-HIGH enables, operating at 2.5 V or 3.3 V supply. It features 5 Ω on-resistance, <0.25 ns propagation delay (A↔B), >400 MHz bandwidth, and 5 V I/O tolerance-designed for high-speed signal routing in PCIe, USB, and memory interface applications.

For engineers reviewing the PI3C3305UE datasheet, PI3C3305UE pinout, PI3C3305UE application, or PI3C3305UE equivalent, key selection criteria include per-gate enable control, rail-to-rail switching, hot-insertion support, low ground bounce, and MSOP-8 packaging compatibility with space-constrained PCB layouts.

Technical Context

The PI3C3305UE implements two independent analog/digital bidirectional CMOS transmission gates, each controlled by a dedicated active-HIGH Bus Enable (BE) input. Switch conduction is governed solely by gate voltage and channel resistance-no internal logic or level-shifting circuitry is present.

It operates across 2.5 V ±10 % or 3.3 V ±10 % supply rails, supports 5 V-tolerant I/O regardless of VCC, and maintains sub-1 ns enable/disable timing (tPZH/tPLZ ≤ 6.5 ns at 3.3 V). The device introduces no added propagation delay beyond RC time constant (RON × CL), validated up to 50 pF load.

Key Specifications

Pinout & Package

PI3C3305UE is housed in an 8-pin Mini Small Outline Package (MSOP), 3.0 mm × 3.0 mm body, 0.65 mm 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 PI3C3245LEX, the PI3C3305UE uniquely delivers per-channel active-HIGH enables in MSOP-8, enabling direct microcontroller GPIO control without inverters or additional logic-critical for compact, low-latency hot-swap designs.

Availability

PI3C3305UE is available at Aetrix Electronics and suitable for PCIe lane switching, USB 2.0 routing, and DDR memory bus isolation requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for PI3C3305UE 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 power management solutions for industrial, computing, and communications markets.

The PI3C3305UE belongs to Diodes' Pericom® high-speed interface product line, engineered specifically for low-latency, low-noise signal routing in next-generation data-intensive systems where timing predictability and signal fidelity are non-negotiable.

FAQ

Can PI3C3305UE operate with 2.5 V supply while interfacing with 5 V signals?

Yes. The device supports 2.5 V or 3.3 V VCC and tolerates –0.5 V to +5.5 V on all A/B/BE pins regardless of supply voltage. This allows safe 5 V signal routing through a 2.5 V–powered switch without level shifters or clamping diodes-verified per DC Electrical Characteristics table in DS40259 Rev 1-2.

What is the maximum recommended load capacitance for maintaining <400 MHz bandwidth?

Maximum recommended load capacitance is 50 pF, as validated in switching characterization tests (CL = 50 pF, RL = 500 Ω). At this load, propagation delay remains ≤0.25 ns and bandwidth exceeds 400 MHz. Exceeding 50 pF increases RC time constant and degrades high-frequency response per Figure 3 and note 3 in the datasheet.

Does PI3C3305UE require external pull-up resistors on BE pins?

No external pull-ups are required for normal operation. However, a pull-up resistor is recommended on each BE pin for power-up protection to ensure switches remain disabled (Hi-Z) during VCC ramp-up-explicitly noted in the Truth Table footnote 2 of DS40259 Rev 1-2.

How does PI3C3305UE differ from PI3C3306UE in system-level implementation?

PI3C3305UE uses active-HIGH enables (BE = HIGH → conduct), while PI3C3306UE uses active-LOW enables (BE = LOW → conduct). This affects control logic design: PI3C3305UE connects directly to GPIOs without inversion, whereas PI3C3306UE requires either inverted drive signals or external inverters to achieve equivalent functionality.