Diodes Incorporated PI5C3309UE

Overview

PI5C3309UE from Diodes Incorporated is a 3:1 analog multiplexer/demultiplexer bus switch with 3-state output, designed for high-speed data path selection in low-voltage digital systems. It features 5 Ω typical on-resistance, near-zero propagation delay (0.25 ns), ultra-low quiescent current (0.2 µA typical), and operates from 4.5 V to 5.5 V supply. It is used in notebook PC I/O expansion and peripheral switching where minimal signal degradation and power efficiency are critical.

For engineers reviewing the PI5C3309UE datasheet, PI5C3309UE pinout, PI5C3309UE application, or PI5C3309UE equivalent, key selection criteria include on-resistance matching, 3-state output control timing (tPZH/tPLZ ≤ 6.0 ns), bus select speed (tSY ≤ 6.6 ns), and MSOP-8 package compatibility with space-constrained PCB layouts.

Technical Context

The PI5C3309UE implements a CMOS-based analog bus switch architecture with dual select inputs (S0, S1) controlling three independent input paths (IA0–IA2) to a single bidirectional output (YA). Its 3-state output enables bus sharing without contention, and the absence of internal logic gates eliminates propagation delay beyond RC time constant effects.

It supports rail-to-rail analog/digital signal switching up to ±0.5 V beyond supply rails (–0.5 V to +7.0 V), with input capacitance of 3 pF and off-capacitance of 4 pF-critical for minimizing signal integrity loss in high-frequency data buses like USB 1.1 or legacy PCI local bus segments.

Key Specifications

Pinout & Package

PI5C3309UE is housed in an 8-pin Mini Small Outline Package (MSOP), 118-mil wide, lead-free and RoHS-compliant (U package code).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBT3244DBQR and PI3CH400UE, the PI5C3309UE uniquely balances 3:1 selection, sub-ns timing, and 0.2 µA quiescent current-making it optimal for power-sensitive, space-constrained notebook I/O routing where minimal delay and zero standby penalty are mandatory.

Availability

PI5C3309UE is available at Aetrix Electronics and suitable for notebook I/O multiplexing, legacy peripheral bus switching, and embedded controller interface expansion requiring stable component supply and long-term lifecycle support.

Supply support for PI5C3309UE 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, energy-efficient solutions for consumer, computing, industrial, and automotive markets.

The PI5C3309UE belongs to Diodes' Pericom-branded analog bus switch product line, engineered specifically for low-latency, low-power signal routing in portable and embedded computing platforms.

FAQ

What is the maximum signal voltage range supported by PI5C3309UE?

The PI5C3309UE supports input/output signal voltages from –0.5 V to +7.0 V relative to ground, independent of VCC. This rail-to-rail capability allows safe switching of analog signals (e.g., audio, sensor outputs) and overvoltage-tolerant digital signals such as 3.3 V or 5 V logic levels-even when VCC is at 5 V. The absolute maximum rating ensures robustness against transient overshoots in shared-bus environments.

Does PI5C3309UE require external pull-up or pull-down resistors on its select pins?

No external biasing resistors are required on S0 or S1. The device specifies guaranteed VIH (≥2.0 V) and VIL (≤0.8 V) thresholds with hysteresis (150 mV), ensuring clean logic recognition across temperature and voltage variations. Inputs draw only ±1 µA, so standard TTL/CMOS drivers directly interface without loading concerns-enabling direct connection to microcontroller GPIO or FPGA output pins.

Can PI5C3309UE be used in hot-swap applications?

Yes-the PI5C3309UE supports hot-swap operation due to its powered-off protection: when VCC = 0 V, all switches remain in high-impedance state, and inputs/outputs tolerate –0.5 V to +7.0 V. Its 4 pF off-capacitance and 3 pF input capacitance minimize glitch coupling during insertion, and the 0.25 ns propagation delay ensures no metastability risk. However, VCC sequencing must precede signal application to avoid latch-up.

Is PI5C3309UE qualified for automotive applications?

No-the PI5C3309UE is not AEC-Q100 qualified and is intended for commercial-grade applications only. Diodes Incorporated explicitly states that automotive-qualified versions require PPAP capability and IATF 16949 manufacturing-neither of which applies to this part. For automotive infotainment or body control modules, engineers must select designated AEC-Q100 parts such as the PI5C3309Q (if available) or alternate qualified bus switches.