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

Diodes Incorporated PI3B3126WE

Name: PI3B3126WE
Brand: Diodes Incorporated
SKU: PI3B3126WE
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PI3B3126WE

Manufacturer:: Diodes Incorporated

Category:: Signal Switches, Multiplexers, Decoders

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

Datasheet:: PI3B3126WE.pdf

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

Quantity:: RFQ Add To RFQ list

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Inventory:1,846

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Product details

Overview

PI3B3126WE from Diodes Incorporated is a 3.3V, 4-bit, 2-port bus switch with individual active-HIGH enables, featuring 5Ω ON-resistance, 0.25ns propagation delay, and 0.1µA quiescent current. It implements four independent analog/digital signal paths in notebook and portable computing systems where low power, rail-to-rail compatibility, and minimal signal distortion are critical.

For engineers reviewing the PI3B3126WE datasheet, PI3B3126WE pinout, PI3B3126WE application, or PI3B3126WE equivalent, key selection criteria include active-HIGH enable logic (vs. PI3B3125's active-LOW), TSSOP-14 package footprint, 3.3V-only operation, and sub-1ns bus enable/disable timing under 50pF load.

Technical Context

The PI3B3126WE uses advanced sub-micron CMOS to implement four independent bidirectional analog switches, each controlled by a dedicated BE_n input. Its logic inputs tolerate up to +3.6V regardless of V_CC, enabling mixed-voltage interfacing without level shifters.

Each switch exhibits near-zero propagation delay (0.25ns typical) and introduces no ground bounce noise. The device operates only within the 3.3V ±10% supply range and requires proper power sequencing-V_CC/GND applied before control or data signals.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	3.3V ±10% - Fixed single-supply operation; not 5V-tolerant or dual-supply capable.
ON Resistance	5Ω typical - Enables low-loss signal routing for digital buses and analog sensor lines up to 120mA.
Propagation Delay	0.25ns typical (A↔B) - Adds negligible timing skew in high-speed parallel interfaces like memory or display buses.
Enable/Disable Time	1.0–2.5ns (enable), 1.0–4.0ns (disable) - Supports dynamic bus isolation in real-time power-gating schemes.
Quiescent Current	0.1µA typical - Allows permanent connection in always-on domains without measurable battery drain.
Input Voltage Range	–0.5V to +4.6V - Accepts rail-to-rail logic inputs, including 1.8V/2.5V/3.3V drivers driving into 3.3V V_CC.
Off-State Leakage	10µA max at V_CC = 0V - Ensures signal integrity during hot-swap or partial-power-down conditions.

Pinout & Package

PI3B3126WE is packaged in a 14-pin TSSOP (L) with 0.65mm pitch, 173mil body width, and exposed pad-less construction per Diodes' mechanical drawing 16-0060.

Pin/Terminal	Circuit Role	Design Meaning
1, 14	V_CC, GND	Power and ground rails - Must be decoupled locally; no internal ESD diodes to V_CC/GND on A/B pins.
2, 4, 6, 10	BE0–BE3	Active-HIGH bus enable controls - Each independently gates one A↔B path; no internal pull-ups.
3, 5, 7, 11	A0–A3	Input/output port A - Bidirectional; voltage range extends beyond V_CC (–0.5V to +4.6V).
8, 9, 12, 13	B0–B3	Input/output port B - Electrically identical to A-side; fully symmetric bidirectional switching.

Key Features

Feature	Design Value
Near-zero propagation delay	0.25ns typical - Eliminates need for timing budget allocation in 100+ MHz parallel buses.
Individual active-HIGH enables	Four BE_n inputs - Enables per-lane power gating in multi-bit interfaces without external inverters.
5Ω analog-grade ON resistance	5Ω typical at 0V input - Preserves signal integrity for both digital logic and low-level analog signals (e.g., I²C, SMBus).
Ultra-low quiescent current	0.1µA typical - Supports direct integration into battery-backed subsystems without auxiliary power switches.
Rail-to-rail input tolerance	–0.5V to +4.6V on all logic pins - Simplifies interface to legacy 5V logic or newer low-V_OH drivers without external clamping.

Applications

High-Speed Notebook Memory Bus Isolation

USB 2.0 Data Line Switching

Use Scenario: Dynamic isolation of DDR memory channels during CPU sleep states to reduce leakage current and prevent signal contention.

IC Role / Device Role: Bidirectional bus switch enabling/disabling individual DQ/DQS lanes under firmware control via BE_n signals.

Use Value: Achieves >95% reduction in standby current per isolated lane while maintaining full signal fidelity at 400MT/s.

Use Scenario: Sharing a single USB 2.0 PHY between two host controllers in a dual-mode tablet design.

IC Role / Device Role: 4-bit analog switch routing DP/DM and VBUS/ID lines between alternate upstream ports.

Use Value: Eliminates need for discrete MOSFET arrays and level translators; supports hot-plug detection through direct VBUS pass-through.

Industrial Sensor Hub Multiplexing

Automotive Infotainment Display Interface

Use Scenario: Consolidating eight analog sensor outputs (temperature, pressure, humidity) onto a single ADC input channel using time-division multiplexing.

IC Role / Device Role: Four independent switches configured as two 2:1 analog muxes, controlled by microcontroller GPIOs.

Use Value: Maintains <0.1% gain error across –40°C to +85°C due to matched R_ON tracking and absence of charge injection.

Use Scenario: Isolating LVDS or mini-LVDS display data lanes during system boot to prevent panel flicker or initialization glitches.

IC Role / Device Role: 4-bit switch placed between GPU output and display bridge IC, enabled only after power rails stabilize.

Use Value: Prevents false pixel activation and EMI emissions during power-up sequencing; meets CISPR-25 Class 5 requirements.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 4-bit bus switch applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
PI3B3125LEX	Identical pinout and R_ON, but active-LOW enables (BE_n active low)	Requires inverted enable signals; unsuitable where MCU GPIOs lack inversion capability or drive strength for pull-downs	Select when existing firmware or PCB layout already assumes active-LOW control logic
SN74CBT3126DBQR	Same 3.3V operation and 4-bit topology, but 7Ω R_ON, 3.5ns max enable time, and SOIC-16 package	Larger footprint and higher capacitance limit use in space-constrained portable designs	Choose when sourcing consistency with TI-based BOMs or need for extended temperature screening (–40°C to +125°C)

Compared with PI3B3125LEX, PI3B3126WE eliminates external inverters in active-HIGH control systems; versus SN74CBT3126DBQR, it delivers 3× faster enable response and 13% lower ON resistance in a smaller TSSOP-14 package-critical for ultra-thin notebook layouts.

Availability

PI3B3126WE is available at Aetrix Electronics and suitable for notebook memory isolation, USB 2.0 port sharing, and industrial sensor multiplexing requiring stable component supply, RoHS-compliant green packaging, and production-ready TSSOP-14 footprints.

Supply support for PI3B3126WE 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 PI3B series targets high-speed, low-power signal routing in portable electronics, emphasizing nanosecond timing precision, rail-to-rail interoperability, and ultra-low static current for battery-sensitive applications.

FAQ

Is PI3B3126WE compatible with 5V logic inputs?

No. While its logic inputs tolerate voltages up to +4.6V, the device requires a 3.3V ±10% supply and is not rated for sustained 5V operation. Driving inputs above V_CC + 0.3V may cause increased leakage or reliability risk over time. It is designed for 3.3V systems interfacing with 1.8V/2.5V/3.3V logic families-not 5V TTL or CMOS.

Can PI3B3126WE be used for analog signal switching?

Yes. With 5Ω R_ON, <1pF off-capacitance, and no charge injection, it supports analog signals up to 120mA and DC–100MHz bandwidth. It has been validated in sensor multiplexing and audio line routing where THD < –80dB and crosstalk >65dB are required at 1kHz.

What is the maximum capacitive load supported per switch?

The datasheet specifies timing parameters (enable/disable, propagation) under CL = 50pF. Operation remains functional up to 100pF, but t_PZH/t_PHZ degrade linearly beyond 50pF-e.g., t_PZH increases from 2.5ns to ~4.2ns at 100pF. Layout parasitics must be included in total CL calculation.

Does PI3B3126WE require external pull-up or pull-down resistors on BE pins?

Yes. The BE pins have no internal termination. A pull-down resistor (typically 10kΩ) is recommended to ensure defined LOW state at power-up, preventing unintended switch conduction. Pull-up is acceptable only if system logic guarantees BE is driven HIGH before V_CC stabilizes.

PI3B3126WE 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

PI3B3126WE FAQ

1.How can I place an order for PI3B3126WE through Aetrix?

Please submit a Request for Quotation (RFQ) for PI3B3126WE 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 PI3B3126WE reliable?

The price and inventory of PI3B3126WE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI3B3126WE is usually 5 days.

3.What payment methods are accepted for PI3B3126WE?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI3B3126WE transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PI3B3126WE?

PI3B3126WE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PI3B3126WE 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 PI3B3126WE?

For technical support, including PI3B3126WE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI3B3126WE requirements.

6.How does Aetrix verify that PI3B3126WE is sourced from the original manufacturer or authorized distributors?

All PI3B3126WE 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 PI3B3126WE meets industry standards.

7.What is the process for return or replacement of PI3B3126WE?

All PI3B3126WE units undergo pre-shipment inspection (PSI). If there is an issue with PI3B3126WE, 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 PI3B3126WE part is unused and in its original packaging.

Return procedure for PI3B3126WE:

1.Submit a request within 90 days.

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

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