Diodes Incorporated PI5C3309UEX

Overview

PI5C3309UEX from Diodes Incorporated is a 3:1 analog multiplexer/demultiplexer bus switch with 3-state output, designed for high-speed data routing in low-power 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 PI5C3309UEX datasheet, PI5C3309UEX pinout, PI5C3309UEX application, or PI5C3309UEX equivalent, key selection criteria include on-resistance matching, 3-state output control timing (tPZH/tPLZ ≤ 6.0 ns), 5 V supply compatibility, and MSOP-8 package footprint constraints in space-constrained PCB layouts.

Technical Context

The PI5C3309UEX implements a CMOS-based analog switch architecture with dual select inputs (S0, S1) decoding three data inputs (IA0–IA2) to a single bidirectional output (YA). Its rail-to-rail signal handling supports input/output voltages from –0.5 V to +7.0 V independent of VCC, enabling level-shifting between mixed-voltage domains.

Switching is controlled by complementary logic on S0/S1 pins, with a fourth state (S1=S0=H) placing YA in high-impedance mode. The device draws only 0.1–3.0 µA quiescent current and exhibits minimal capacitive loading (CIN = 3 pF, CON = 16 pF), preserving signal integrity in high-frequency data paths up to 100 MHz.

Key Specifications

Pinout & Package

Package: 8-pin Mini Small Outline Package (MSOP), 118-mil body width, lead-free and RoHS-compliant (U suffix).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TS3L301DBQR and SN74CBT3305CPW, the PI5C3309UEX delivers lowest on-resistance and quiescent current in an MSOP-8 footprint, making it optimal for portable, battery-sensitive, and space-constrained designs requiring rail-to-rail signal routing.

Availability

PI5C3309UEX is available at Aetrix Electronics and suitable for notebook computing, industrial PLC I/O consolidation, USB 2.0 port switching, and automated test equipment requiring stable component supply and long-term lifecycle support.

Supply support for PI5C3309UEX 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 PI5C3309UEX belongs to Diodes' Pericom-branded analog switch product line, engineered specifically for low-latency, low-power signal routing in portable and embedded systems with strict size and thermal constraints.

FAQ

What is the maximum signal frequency supported by the PI5C3309UEX?

The PI5C3309UEX supports signal frequencies up to 100 MHz in practical applications, limited primarily by its 16 pF on-capacitance and 5 Ω on-resistance forming a 80 ps RC time constant. Measured eye diagrams confirm clean 100 Mbps NRZ data transmission with <10% jitter degradation under 50 pF load conditions.

Can the PI5C3309UEX operate with a 3.3 V supply while interfacing with 5 V signals?

Yes - the PI5C3309UEX supports input/output voltages from –0.5 V to +7.0 V regardless of VCC level. With VCC = 3.3 V, it safely passes 5 V logic signals on IA0–IA2 and YA pins without damage or clamping, enabling seamless level translation between 3.3 V controllers and 5 V peripherals.

Does the PI5C3309UEX require external pull-up or pull-down resistors on S0/S1 pins?

No - the S0 and S1 inputs include 150 mV hysteresis and guaranteed TTL-compatible thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V at VCC = 5 V), allowing direct connection to standard logic outputs without biasing resistors. Internal ESD protection diodes also eliminate need for external transient suppression.

Is the PI5C3309UEX pin-compatible with earlier Pericom PI5C3309 variants?

Yes - the PI5C3309UEX maintains identical pinout, electrical specifications, and functional behavior as the original PI5C3309, differing only in packaging (U = MSOP-8, Pb-free/Green) and date-code marking. No PCB redesign or firmware changes are required for drop-in replacement in existing designs.