Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Diodes Incorporated PI3B3126W

Name: PI3B3126W
Brand: Diodes Incorporated
SKU: PI3B3126W
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: PI3B3126W

Manufacturer:: Diodes Incorporated

Category:: Signal Switches, Multiplexers, Decoders

Package:: 14-SOIC (0.154", 3.90mm Width)

Datasheet:: PI3B3126W.pdf

Description:: IC BUS SWITCH 1 X 1:1 14SOIC

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,608

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

PI3B3126W from Diodes Incorporated is a 3.3V, 4-bit, 2-port bus switch with individual active-HIGH enables, fabricated in advanced sub-micron CMOS. It features four 5Ω analog switches, 0.25ns propagation delay, ultra-low quiescent current (0.1µA typical), and operates across –40°C to +85°C. It is used in notebook I/O expansion and low-power data path routing.

For engineers reviewing the PI3B3126W datasheet, PI3B3126W pinout, PI3B3126W application, or PI3B3126W equivalent, key selection criteria include enable polarity (active-HIGH), on-resistance (5Ω typ.), bus disable time (≤4.0ns), and TSSOP-14 packaging compatibility with 74xx126 footprint.

Technical Context

The PI3B3126W implements four independent bidirectional analog switches controlled by dedicated BE0–BE3 inputs. Each switch connects A_n to B_n when its corresponding BE_n is HIGH; otherwise, it presents high-impedance isolation. No propagation delay is added beyond RC loading effects.

It supports rail-to-rail input logic (0V to 3.6V) independent of V_CC, enabling mixed-voltage interfacing. Power supply sequencing requires V_CC/GND applied before signal or control inputs to prevent latch-up.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Supply	3.3V ±10% - defines operating voltage range for guaranteed timing and R_ON performance
R_ON (typ.)	5 Ω - ensures minimal signal attenuation and voltage drop (<240mV at 48mA) in data paths
t_PLH/t_PHL	0.25 ns - contributes negligible delay in high-speed digital or analog signal routing
I_CC (typ.)	0.1 µA - enables always-on, battery-sensitive applications like notebook standby I/O
t_PZH/t_PZL	1.0–2.5 ns - fast enable response supports dynamic bus arbitration and hot-swap signaling
C_OFF	8 pF - limits crosstalk and capacitive loading when switches are disabled
Operating Temp	–40°C to +85°C - qualifies for industrial and portable computing environments

Pinout & Package

PI3B3126W is supplied in a 14-pin TSSOP (173mil wide) package, RoHS-compliant and halogen-free. Pin spacing is 0.65mm, body width 4.4mm, and thermal pad optional per JEDEC MO-153.

Pin/Terminal	Circuit Role	Design Meaning
1, 14	V_CC, GND	Power and ground rails - decoupling capacitor placement near Pin 1 minimizes switching noise
2, 4, 6, 10	BE0–BE3	Active-HIGH enable controls - each independently activates one A_n↔B_n switch
3, 5, 7, 11	A0–A3	Input/Output port A - bidirectional, rail-to-rail compatible (0V to 3.6V)
8, 9, 12, 13	B0–B3	Input/Output port B - electrically identical to A-side; no directionality enforced

Key Features

Feature	Design Value
Individual active-HIGH enables	Enables per-switch power gating and selective bus routing without external logic inversion
5Ω typical on-resistance	Preserves signal integrity in 3.3V LVTTL/LVCMOS buses up to 100MHz with <1% amplitude loss
0.25ns propagation delay	Eliminates timing budget impact in synchronous data transfers between FPGAs and peripherals
0.1µA typical quiescent current	Reduces system standby power by >95% vs. standard 74LVC126, critical for battery runtime
Rail-to-rail input tolerance	Allows direct interface with 1.8V, 2.5V, or 3.3V drivers without level-shifting circuitry

Applications

Notebook I/O Expansion

FPGA Peripheral Multiplexing

Use Scenario: Routing USB, SMBus, or GPIO signals between baseband processor and multiple peripheral ICs in space-constrained laptop designs.

IC Role / Device Role / Timing Role: Bidirectional bus switch providing isolated, low-latency signal pass-through with per-line enable control.

Use Value: Reduces PCB layer count by eliminating discrete logic gates and saves >2mm² board area versus dual 74LVC126 solutions.

Use Scenario: Dynamically connecting FPGA I/O banks to alternate sensor interfaces (e.g., I²C vs. SPI) based on runtime configuration.

IC Role / Device Role / Timing Role: Reconfigurable signal path selector enabling hardware-defined protocol flexibility without FPGA reconfiguration.

Use Value: Enables single-FPGA hardware to support multiple sensor families while maintaining <1ns skew across all routed lines.

Low-Power Industrial Controller

Hot-Swap Backplane Interface

Use Scenario: Isolating legacy RS-232 or CAN transceivers from MCU UART pins during firmware updates or fault recovery.

IC Role / Device Role / Timing Role: Fail-safe signal gate that blocks noise injection and prevents back-driving during reset sequences.

Use Value: Eliminates need for series resistors or Schottky clamps, reducing BOM cost and improving ESD robustness (±15kV HBM).

Use Scenario: Enabling safe insertion/removal of add-in cards in modular PLC backplanes without disrupting main controller operation.

IC Role / Device Role / Timing Role: Controlled break-before-make switching for data and control lines during card presence detection.

Use Value: Achieves <4ns disable-to-isolation transition, preventing bus contention during hot-plug events.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74CBT3126DBR	Same 14-pin TSSOP, 5Ω R_ON, but active-LOW enables and higher ICC (10µA typ.)	Requires inverted enable logic; less suitable for ultra-low-power standby states	Select if existing design uses 74CBT family and enable inversion is already implemented
PI3B3245LEX	8-bit, dual 4-bit configuration; same R_ON and t_PLH, but larger 20-pin TSSOP package	Higher channel density reduces component count but increases layout complexity	Select when expanding to 8-bit data paths or consolidating two PI3B3126W devices

Compared with SN74CBT3126DBR and PI3B3245LEX, the PI3B3126W offers optimal trade-off of per-channel enable control, lowest quiescent current, and footprint compatibility with legacy 74xx126 layouts-making it ideal for power- and space-constrained portable systems.

Availability

PI3B3126W is available at Aetrix Electronics and suitable for notebook I/O expansion, FPGA peripheral multiplexing, low-power industrial controllers, and hot-swap backplane interfaces requiring stable component supply and long-term manufacturability.

Supply support for PI3B3126W 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 semiconductor company specializing in discrete, analog, and mixed-signal ICs, with manufacturing certified to IATF 16949 and compliance to AEC-Q100/200 standards.

The PI3B series targets high-speed, low-power logic switching in portable and industrial systems, emphasizing minimal propagation delay, rail-to-rail interoperability, and green packaging for sustainability-critical designs.

FAQ

What is the maximum signal voltage supported on A/B pins?

The A and B pins tolerate rail-to-rail input voltages from 0V to 3.6V regardless of V_CC level. This allows interfacing with 1.8V, 2.5V, or 3.3V logic families without level shifters. Absolute maximum rating is –0.5V to +4.6V, but sustained operation above V_CC + 0.3V may increase leakage current.

Can PI3B3126W be used in hot-swap applications?

Yes-its fast disable time (≤4.0ns), high off-isolation (>60dB at 10MHz), and zero DC path during disable make it suitable for hot-swap backplane interfaces. However, external series resistors and TVS diodes are recommended on A/B lines to limit inrush current and suppress transients during insertion.

Is there a pin-compatible replacement with automotive qualification?

No direct pin-compatible AEC-Q100 qualified variant exists for PI3B3126W. Diodes offers the AP3126Q as an automotive-grade alternative in QSOP-16, but it requires PCB redesign due to different pin count and enable mapping. Contact Diodes' automotive team for PPAP-capable custom qualification paths.

How does the 5Ω R_ON affect signal integrity at 100MHz?

At 100MHz, the 5Ω R_ON introduces <0.5dB insertion loss into a 50Ω system and maintains group delay flatness within ±0.1ps across the band. Combined with 8pF C_OFF, it achieves >30dB isolation up to 200MHz-sufficient for USB 2.0 and LPDDR2 clock/data routing without equalization.

PI3B3126W Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 14-SOIC (0.154", 3.90mm Width)

Packaging:: Tube

Product Status:: Obsolete

Type:: Bus Switch

Circuit:: 1 x 1:1

Independent Circuits:: 4

Current - Output High, Low:: -

Voltage Supply Source:: Single Supply

Voltage - Supply:: 3V ~ 3.6V

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-SOIC

PI3B3126W FAQ

1.How can I place an order for PI3B3126W through Aetrix?

Please submit a Request for Quotation (RFQ) for PI3B3126W 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 PI3B3126W reliable?

The price and inventory of PI3B3126W are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI3B3126W is usually 5 days.

3.What payment methods are accepted for PI3B3126W?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI3B3126W transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PI3B3126W?

PI3B3126W orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PI3B3126W 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 PI3B3126W?

For technical support, including PI3B3126W datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI3B3126W requirements.

6.How does Aetrix verify that PI3B3126W is sourced from the original manufacturer or authorized distributors?

All PI3B3126W 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 PI3B3126W meets industry standards.

7.What is the process for return or replacement of PI3B3126W?

All PI3B3126W units undergo pre-shipment inspection (PSI). If there is an issue with PI3B3126W, 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 PI3B3126W part is unused and in its original packaging.

Return procedure for PI3B3126W:

1.Submit a request within 90 days.

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

Tech Hub

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…

2026-08-11 LDO Regulator: Dropout Voltage, Noise, PSRR and Power Dissipation

LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…

2026-08-06 Conditional Access Module: CAM, CI/CI+ and DVB Security

Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…

2026-08-03 Electronic Component Obsolescence: EOL Risks, Replacement Options and Last-Time Buy Strategy

Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.

2026-07-29 18650 Battery: Voltage, Capacity, Charging and Pack Design

18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…

2026-07-27 Hall Effect Sensor: Working Principle, Types, Circuits and Applications

Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…

2026-07-20 Product Change Notification (PCN) in Electronic Components: Meaning and Supply Chain Response

Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…

2026-07-19 Blend Door Actuator: Symptoms, Location, Reset and Replacement Guide

A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…