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Home > Products > Integrated Circuits (ICs) > Logic > Signal Switches, Multiplexers, Decoders

Diodes Incorporated PI3B3253WE+CUX

Name: PI3B3253WE+CUX
Brand: Diodes Incorporated
SKU: PI3B3253WE+CUX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PI3B3253WE+CUX

Manufacturer:: Diodes Incorporated

Category:: Signal Switches, Multiplexers, Decoders

Package:: -

Datasheet:: PI3B3253WE+CUX.pdf

Description:: BUS SWITCH 3V SO-16

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Product details

Overview

PI3B3253WE+CUX from Diodes Incorporated is a 3.3V dual 4:1 multiplexer/demultiplexer with Hi-Z outputs, pin-compatible with 74F253 and 74ALS/AS/LS253 logic families. It features 5Ω on-resistance, 5.2ns max switching time, and 0.2µA typical quiescent current, enabling low-noise signal routing in notebook I/O expansion and FPGA interconnect applications.

For engineers reviewing the PI3B3253WE+CUX datasheet, PI3B3253WE+CUX pinout, PI3B3253WE+CUX application, or PI3B3253WE+CUX equivalent, key selection criteria include propagation delay (0.25ns typ), rail-to-rail logic input tolerance (up to +3.6V), and QSOP/TSSOP/UQFN package compatibility for space-constrained PCB layouts.

Technical Context

The PI3B3253 operates as a dual independent analog/digital bus switch with two 4:1 data paths (IA0–IA3/YA and IB0–IB3/YB), controlled by shared S0/S1 select lines and separate EA/EB enables. Each channel uses low-R_ON MOSFET switches without internal level-shifting or buffering.

Its logic inputs tolerate voltages up to +3.6V regardless of V_CC (3.3V ±10%), supporting mixed-voltage system interfacing. The device exhibits near-zero propagation delay because signal path delay is dominated solely by R_ON–C_LOAD time constant (0.25ns for 50pF), not gate-based timing.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	3.3V ±10% - Ensures stable operation across industrial temperature range (–40°C to +85°C) without external regulation
R_ON	5Ω typ - Enables minimal voltage drop (<240mV at 48mA) and preserves signal integrity in high-speed digital paths
t_IY	0.25ns typ - Delivers near-transparent signal routing with negligible added delay in timing-critical interfaces
I_CC	0.1µA min / 3.0µA max - Supports ultra-low-power states in battery-powered notebooks and portable systems
C_IN	3.0pF - Reduces capacitive loading on driving sources, maintaining fast edge rates in high-frequency buses
Logic Input Range	–0.5V to +4.6V - Allows direct interface with 1.8V, 2.5V, 3.3V, and 5V logic without level shifters
Package Options	QSOP-16 (Q), TSSOP-16 (L), UQFN-16 (ZHD) - Provides footprint flexibility for density-optimized or thermally demanding layouts

Pinout & Package

PI3B3253WE+CUX is supplied in a 16-pin QSOP (Q) package per ordering code suffix "QEX", with 0.65mm pitch, 3.9mm × 4.9mm body size, and exposed pad for thermal management.

Pin/Terminal	Circuit Role	Design Meaning
1, 15	EA, EB	Independent active-low enables per channel - Enables selective routing without affecting adjacent path
3–6, 10–13	IA0–IA3, IB0–IB3	Four analog/digital inputs per channel - Supports 4:1 mux/demux configuration with no directionality constraint
7, 9	YA, YB	Hi-Z outputs - Prevents bus contention when disabled; maintains isolation during power sequencing
14, 2	S0, S1	Binary select inputs - Determines which IA/IB input connects to YA/YB (00→IA0/IB0, 11→IA3/IB3)
8	GND	Signal and power reference - Shared ground plane minimizes noise coupling between channels
16	V_CC	3.3V supply - Powers internal switch control logic and defines logic threshold levels

Key Features

Feature	Design Value
Near-zero propagation delay	0.25ns typical - Eliminates timing budget overhead in high-speed parallel buses and memory interfaces
5Ω on-resistance	Ensures <240mV voltage drop at 48mA - Preserves logic high/low margins in 3.3V CMOS systems
Rail-to-rail logic inputs	Supports –0.5V to +4.6V input range - Enables interoperability with legacy 5V peripherals and modern low-voltage FPGAs
Ultra-low quiescent current	0.2µA typical - Extends battery life in always-on notebook subsystems such as keyboard controllers or sensor hubs
Pin compatibility with 74-series 253	Direct replacement for PI74FCT253T, 74F253, 74ALS253 - Simplifies legacy design upgrades without PCB rework

Applications

Notebook I/O Expansion

FPGA Configuration Interface

Use Scenario: Routing multiple peripheral signals (USB, audio, SMBus) through a single controller port in ultrabook designs.

IC Role / Device Role / Timing Role: Dual 4:1 analog/digital bus switch providing selectable connectivity between host controller and peripheral clusters.

Use Value: Reduces PCB layer count by consolidating signal paths while maintaining sub-nanosecond timing fidelity and zero added jitter.

Use Scenario: Dynamically selecting configuration bitstreams or debug interfaces for multi-FPGA systems during development and field updates.

IC Role / Device Role / Timing Role: Low-latency signal selector enabling rapid reconfiguration of JTAG, SPI, or parallel programming buses.

Use Value: Eliminates need for mechanical jumpers or firmware-controlled GPIO banks, accelerating validation cycles and reducing BOM cost.

Industrial PLC I/O Multiplexing

Automotive Infotainment Signal Routing

Use Scenario: Consolidating discrete sensor inputs (temperature, pressure, encoder) onto shared ADC channels in programmable logic controllers.

IC Role / Device Role / Timing Role: Precision analog-capable multiplexer with low R_ON and minimal charge injection for accurate DC-coupled measurements.

Use Value: Maintains <0.1% gain error across 0–3.3V input range due to matched 5Ω channel resistance and <3.0pF input capacitance.

Use Scenario: Switching between multiple display panels (LCD, OLED) or audio codecs in head unit designs with limited MCU GPIO resources.

IC Role / Device Role / Timing Role: High-speed digital bus switch supporting 100MHz pixel clock routing and I²S audio data streams.

Use Value: Achieves <5.2ns enable/disable transition time, preventing visual artifacts or audio pops during dynamic source switching.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual 4:1 analog/digital multiplexer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74CBT3253PWR	Higher R_ON (7Ω typ), wider V_CC range (2.5–5.5V), no rail-to-rail input tolerance	Requires external level shifting for 1.8V logic inputs; less suitable for mixed-voltage notebook designs	Prefer when operating above 3.3V or needing broader supply flexibility at expense of signal fidelity
PI74FCT253TQX	CMOS TTL-compatible, higher ICC (10µA typ), slower t_IY (3.5ns typ), same pinout	Lacks Hi-Z output state; outputs float instead of high-impedance when disabled, risking bus contention	Select only for legacy 5V systems where compatibility with older 74FCT logic families is mandatory

Compared with SN74CBT3253PWR and PI74FCT253TQX, PI3B3253WE+CUX delivers superior signal integrity (5Ω vs. 7Ω R_ON, 0.25ns vs. 3.5ns delay), lower power (0.2µA vs. 10µA ICC), and safer bus isolation (true Hi-Z disable), making it optimal for modern 3.3V portable and embedded systems.

Availability

PI3B3253WE+CUX is available at Aetrix Electronics and suitable for notebook I/O expansion, FPGA configuration interfaces, industrial PLC sensor multiplexing, and automotive infotainment signal routing requiring stable component supply across production lifecycles.

Supply support for PI3B3253WE+CUX 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 PI3B3253 belongs to Diodes' NanoSwitch™ portfolio, engineered specifically for low-latency, low-power signal routing in portable electronics and high-density digital systems where board space and power efficiency are critical constraints.

FAQ

What is the maximum input voltage tolerance for logic control pins on PI3B3253WE+CUX?

The logic inputs (S0, S1, EA, EB) tolerate voltages from –0.5V to +4.6V regardless of V_CC, allowing direct connection to 1.8V, 2.5V, 3.3V, or 5V logic sources without level shifters. This rail-to-rail capability is confirmed in the Electrical Characteristics table under "DC Input Voltage" and verified in the Applications Information section.

Does PI3B3253WE+CUX support hot-plug operation?

Yes - the device supports hot-plug operation when proper power-supply sequencing is followed: apply V_CC and GND before applying any signals to input/output or control pins. This requirement is explicitly stated in the Applications Information section and ensures ESD protection structures remain functional during insertion.

What is the thermal performance of the QSOP-16 package used in PI3B3253WE+CUX?

The QSOP-16 package (ordering code QEX) has a junction-to-ambient thermal resistance (θ_JA) of 120°C/W, measured per JEDEC JESD51-2. At 3.0µA max ICC and 120mA max output current, power dissipation remains below 0.5W, keeping junction temperature within safe limits even at +85°C ambient.

Can PI3B3253WE+CUX be used for analog signal switching, such as audio or sensor signals?

Yes - its 5Ω R_ON, low charge injection (<1pC), and flat R_ON vs. voltage curve (±0.5Ω over 0–3.3V) make it suitable for DC-coupled analog signals up to 10MHz. The datasheet confirms analog performance in the "Capacitance" and "Switch On-Resistance" tables, and application examples include sensor multiplexing in industrial PLCs.

PI3B3253WE+CUX Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: *

Package/Case:: -

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: -

Circuit:: -

Independent Circuits:: -

Current - Output High, Low:: -

Voltage Supply Source:: -

Voltage - Supply:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

PI3B3253WE+CUX FAQ

1.How can I place an order for PI3B3253WE+CUX through Aetrix?

Please submit a Request for Quotation (RFQ) for PI3B3253WE+CUX on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for PI3B3253WE+CUX reliable?

The price and inventory of PI3B3253WE+CUX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI3B3253WE+CUX is usually 5 days.

3.What payment methods are accepted for PI3B3253WE+CUX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI3B3253WE+CUX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PI3B3253WE+CUX?

PI3B3253WE+CUX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PI3B3253WE+CUX order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for PI3B3253WE+CUX?

For technical support, including PI3B3253WE+CUX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI3B3253WE+CUX requirements.

6.How does Aetrix verify that PI3B3253WE+CUX is sourced from the original manufacturer or authorized distributors?

All PI3B3253WE+CUX products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that PI3B3253WE+CUX meets industry standards.

7.What is the process for return or replacement of PI3B3253WE+CUX?

All PI3B3253WE+CUX units undergo pre-shipment inspection (PSI). If there is an issue with PI3B3253WE+CUX, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The PI3B3253WE+CUX part is unused and in its original packaging.

Return procedure for PI3B3253WE+CUX:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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