Diodes Incorporated PI3C3305UEX

Overview

PI3C3305UEX 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 PI3C3305UEX datasheet, PI3C3305UEX pinout, PI3C3305UEX application, or PI3C3305UEX equivalent, key selection criteria include enable polarity (active-HIGH), rail-to-rail switching capability, hot-insertion support, and MSOP-8 package compatibility with space-constrained PCB layouts.

Technical Context

The PI3C3305UEX implements two independent analog/digital bidirectional pass-gate switches controlled by separate BE1/BE2 inputs. Each gate connects A1↔B1 or A2↔B2 with no added logic delay-only RC-limited delay from 5 Ω R_ON and load capacitance.

It supports mixed-voltage operation: control inputs tolerate up to 5 V regardless of V_CC (2.5 V or 3.3 V), enabling interfacing between legacy 5 V logic and modern low-voltage buses while maintaining hot-plug robustness via controlled enable sequencing.

Key Specifications

Pinout & Package

PI3C3305UEX 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-187AA).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 2-bit bus switch applications.

Compared with SN74CBT3244DBQR and PI3C3245LEX, the PI3C3305UEX uniquely supports dual-supply (2.5 V/3.3 V), offers lowest R_ON (5 Ω), and fits compact MSOP-8-making it optimal for space- and voltage-flexible high-speed routing where minimal delay and hot-swap safety are critical.

Availability

PI3C3305UEX is available at Aetrix Electronics and suitable for PCIe lane multiplexing, USB 2.0 signal switching, and hot-swappable module interfaces requiring stable component supply across industrial, telecom, and embedded computing programs.

Supply support for PI3C3305UEX 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, high-reliability components for power management, signal integrity, and protection applications.

The PI3C3305UEX belongs to Diodes' Pericom® high-speed interface product line, engineered specifically for low-latency, rail-to-rail signal routing in next-generation data-intensive systems such as servers, storage, and programmable logic platforms.

FAQ

What is the maximum signal frequency supported by PI3C3305UEX?

The PI3C3305UEX is characterized for >400 MHz bandwidth, verified via S-parameter measurements and eye-diagram testing at 480 Mbps (USB 2.0). Its 5 Ω R_ON and 3.5 pF input capacitance maintain signal integrity up to 500 MHz in typical 50 Ω impedance environments with proper termination.

Can PI3C3305UEX operate with 2.5 V supply and 5 V input signals simultaneously?

Yes. The device supports 2.5 V V_CC while accepting 0–5 V logic levels on all control (BE1/BE2) and I/O (A/B) pins. This allows direct interfacing with 5 V microcontrollers or FPGAs without external level shifters-verified per DC Electrical Characteristics table in DS40259 Rev 1-2.

Is PI3C3305UEX pin-compatible with PI3C3306UEX?

No. Although both use identical MSOP-8 packaging and pinout, PI3C3305UEX has active-HIGH enables (BE1/BE2), whereas PI3C3306UEX uses active-LOW enables. Swapping them requires inverting enable logic in firmware or hardware-confirmed by truth table differences in DS40259 Section 3.

Does PI3C3305UEX require external pull-up resistors on enable pins?

No pull-up is required for normal operation. However, a weak pull-up (≥10 kΩ) on BE1/BE2 is recommended at power-up to ensure high-impedance default state before firmware initialization-per Note 2 in the Truth Table section of DS40259, which cites "pull-up resistor for power-up protection".