Diodes Incorporated PI5C3309LE

Overview

PI5C3309LE from Diodes Incorporated is a 3:1 analog multiplexer/demultiplexer bus switch with 3-state output, designed for high-speed data routing in low-voltage digital systems. It features 5 Ω on-resistance, near-zero propagation delay (0.25 ns typical), and ultra-low quiescent current (0.2 µA typical), enabling direct bus connection without ground bounce in notebook and portable computing applications.

For engineers reviewing the PI5C3309LE datasheet, PI5C3309LE pinout, PI5C3309LE application, or PI5C3309LE equivalent, key selection criteria include its 5 Ω R_ON, 3-state output control, 0.25 ns t_IY propagation delay, ±1 µA I_IL/I_IH, and MSOP-8 package compatibility with space-constrained PCB layouts.

Technical Context

The PI5C3309LE 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 latches eliminates setup/hold timing constraints.

Switching is governed by TTL-compatible logic thresholds (V_IL ≤ 0.8 V, V_VIH ≥ 2.0 V) and supports rail-to-rail analog signal pass-through up to 7.0 V. The device operates across –40°C to +85°C ambient with V_CC = 4.5–5.5 V, and exhibits 3 pF input capacitance and 4 pF off-capacitance for minimal signal loading.

Key Specifications

Pinout & Package

Package: 8-pin MSOP (U), 118-mil width, lead-free and RoHS-compliant, with thermal pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 3:1 analog bus switch applications.

Compared with TS3L301DR and SN74CBT3305CPW, the PI5C3309LE uniquely combines sub-µA quiescent current, true 3-state output, and 5 Ω R_ON in a single MSOP-8 footprint-making it optimal for power- and space-constrained portable computing bus architectures.

Availability

PI5C3309LE is available at Aetrix Electronics and suitable for notebook computing, USB docking systems, embedded controller expansion, and industrial IoT sensor hub designs requiring stable component supply and long-term lifecycle continuity.

Supply support for PI5C3309LE 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 analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

The PI5C3309LE belongs to Diodes' Pericom-branded high-speed analog 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 that can be passed through the PI5C3309LE switches?

The PI5C3309LE supports analog/digital signal voltages from –0.5 V to +7.0 V on both inputs and outputs, independent of V_CC. This rail-to-rail capability allows it to handle mixed-voltage interfaces, such as 3.3 V logic driving 5 V peripherals, provided V_CC is set to the higher rail and all pins remain within absolute maximum ratings.

Does the PI5C3309LE require external pull-up or pull-down resistors on its select inputs?

No. The S0 and S1 inputs have TTL-compatible thresholds (V_IL ≤ 0.8 V, V_VIH ≥ 2.0 V) and internal input hysteresis (150 mV), allowing direct connection to standard CMOS or TTL GPIO outputs without external biasing. Input leakage is ±1 µA, eliminating need for pull resistors in most MCU-driven configurations.

Can the PI5C3309LE be used in hot-swap or live-insertion applications?

Yes-the device features powered-off protection: when V_CC = 0 V, all switches are inherently OFF, and I/O pins exhibit high impedance with ±0.5 V fault tolerance. This prevents back-powering or latch-up during live insertion, provided V_CC sequencing follows standard power-up order (V_CC before signal application).

Is the PI5C3309LE pin-compatible with earlier Pericom PI5C3309 variants?

Yes-PI5C3309LE shares identical pinout, electrical specifications, and MSOP-8 package with legacy PI5C3309 versions (e.g., PI5C3309UE). The "LE" suffix denotes lead-free/Green compliance per RoHS 3, with no functional or mechanical changes affecting PCB layout or firmware integration.