Diodes Incorporated PI5C3305UEX

Overview

PI5C3305UEX from Pericom Semiconductor is a 2-bit bus switch IC with individually controlled 5Ω analog switches, active-HIGH enables (BE1/BE2), near-zero propagation delay (0.25 ns), and ultra-low quiescent current (0.2 μA typical). It directly connects A1↔B1 and A2↔B2 when enabled, eliminating ground bounce and added timing skew-used in notebook I/O isolation and low-power peripheral multiplexing.

For engineers reviewing the PI5C3305UEX datasheet, PI5C3305UEX pinout, PI5C3305UEX application, or PI5C3305UEX equivalent, key selection criteria include individual enable control per channel, 5Ω on-resistance at 4.5V, 50pF load-compatible switching, and MSOP-8 footprint compatibility with space-constrained portable designs.

Technical Context

The PI5C3305UEX implements two independent single-pole single-throw (SPST) CMOS analog switches, each controlled by its own logic-level BE pin. Switch conduction is bidirectional, with no polarity constraint between A and B terminals, and operates across VCC = 4V–5.5V.

Its architecture avoids latch-up and introduces no DC offset or signal inversion; all logic inputs exhibit 250 mV hysteresis for noise immunity, and output leakage remains ≤±1 μA in high-impedance state over –40°C to +85°C ambient.

Key Specifications

Pinout & Package

PI5C3305UEX is housed in an 8-pin MSOP (U package code), 118-mil wide, Pb-free and RoHS-compliant surface-mount package with exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBT3244DBQR and TS3A27518EGET, PI5C3305UEX uniquely balances per-channel control, sub-μA quiescent draw, and noise-immune enables-making it optimal for portable I/O gating where timing, power, and layout simplicity are co-constrained.

Availability

PI5C3305UEX is available at Aetrix Electronics and suitable for notebook I/O isolation, portable peripheral multiplexing, and embedded display interface routing requiring stable component supply and long-term lifecycle support.

Supply support for PI5C3305UEX 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 of high-speed signal integrity solutions, specializing in clock management, interface bridging, and analog switching-acquired by Diodes Incorporated in 2017.

The PI5C3305 belongs to Pericom's low-voltage bus switch product line, engineered specifically for power-sensitive portable computing and peripheral interface consolidation.

FAQ

What is the maximum capacitive load the PI5C3305UEX can drive while maintaining specified timing?

The device is characterized for 50 pF load capacitance, with propagation delay guaranteed at 0.25 ns (max) under that condition. Driving >50 pF increases RC time constant linearly-e.g., 100 pF yields ~0.5 ns delay-but remains functional up to 100 pF with minor timing margin reduction. Layout parasitics must be included in total load calculation.

Can PI5C3305UEX operate with VCC = 3.3 V?

No-absolute maximum ratings specify VCC down to –0.5 V, but operational specifications (RON, tPD, VIH/VIL) are only guaranteed over VCC = 4 V to 5.5 V. At 3.3 V, RON rises significantly (>15 Ω), VIH threshold becomes ambiguous, and timing margins collapse; use PI5C3257 or similar 3.3 V–optimized switches instead.

Is there a recommended pull-up resistor value for the BE pins during power-up?

Yes-a 10 kΩ pull-down resistor is recommended on each BE pin to ensure default OFF state during power ramp, per Note 2 in the truth table. Pull-ups are not advised; BE is active-HIGH and requires clean LOW assertion at startup to prevent unintended conduction before firmware initialization.

Does PI5C3305UEX support hot-swap or live-insertion applications?

It supports hot-swap in the sense that all pins tolerate –0.5 V to +7.0 V with respect to GND, and outputs enter high-impedance state when disabled. However, no built-in current limiting or slew-rate control exists-external series resistors (e.g., 10–33 Ω) are required on A/B lines to limit inrush during live insertion into powered backplanes.