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

Diodes Incorporated PI3C3125LE+DLX

Name: PI3C3125LE+DLX
Brand: Diodes Incorporated
SKU: PI3C3125LE+DLX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PI3C3125LE+DLX

Manufacturer:: Diodes Incorporated

Category:: Signal Switches, Multiplexers, Decoders

Package:: 14-TSSOP (0.173", 4.40mm Width)

Datasheet:: PI3C3125LE+DLX.pdf

Description:: IC BUS SWITCH 4 X 1:1 14TSSOP

Quantity:: RFQ Add To RFQ list

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Inventory:2,875

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Product details

Overview

PI3C3125LE+DLX from Diodes Incorporated is a 2.5V/3.3V, 4-bit, 2-port bus switch with individual active-low enables, featuring 5Ω ON-resistance, near-zero propagation delay (0.25 ns), and >400MHz bandwidth. It operates rail-to-rail, supports hot insertion, and is used in high-speed data routing between memory buses and peripheral interfaces in embedded computing systems.

For engineers reviewing the PI3C3125LE+DLX datasheet, PI3C3125LE+DLX pinout, PI3C3125LE+DLX application, or PI3C3125LE+DLX equivalent, key selection criteria include enable polarity (active-low), 14-pin TSSOP (L) package compatibility, 5V I/O tolerance, and 2.5V supply operation for low-power signal switching.

Technical Context

The PI3C3125LE+DLX implements four independent bilateral analog switches with CMOS transmission-gate architecture, each controlled by a dedicated /BE pin. Its 5Ω R_ON and <10pF channel capacitance enable minimal signal distortion at frequencies up to 400MHz.

It uses a single 2.5V supply (±10% over –40°C to +85°C), tolerates 5V on A/B I/O pins regardless of V_CC, and achieves bus disable times ≤6.5 ns - critical for hot-docking handshaking and glitch-free state transitions.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	2.5V ±10% - enables direct integration into 2.5V logic domains without level-shifting.
ON Resistance	5Ω typ. - ensures minimal voltage drop (<120mV at 24mA) and preserves signal integrity across switched paths.
Propagation Delay	0.25 ns typ. - contributes negligible timing skew in high-speed parallel bus applications.
I/O Voltage Tolerance	5V tolerant on A/B pins - allows interoperability with legacy 5V peripherals while powered from 2.5V.
Bandwidth	>400MHz - supports DDR2/DDR3 address/control bus switching and PCIe sideband signal routing.
Enable Polarity	Active-low (/BE0–/BE3) - matches standard 74LVC125 control logic for drop-in replacement in existing designs.
Quiescent Current	260 µA max. - reduces standby power in always-on system management interfaces.

Pinout & Package

PI3C3125LE+DLX is packaged in a 14-pin TSSOP (L), 173-mil wide, RoHS-compliant, lead-free, green-qualified body with exposed pad thermal performance suitable for industrial ambient conditions.

Pin/Terminal	Circuit Role	Design Meaning
VCC	Power Supply	2.5V supply input; powers internal logic and switch transistors.
GND	Ground Reference	Return path for all signals and supply current; must be low-impedance for noise immunity.
A0–A3	Input Bus Port A	Unidirectional or bidirectional data inputs connected to source-side logic (e.g., CPU address lines).
B0–B3	Output Bus Port B	Switched outputs routed to destination-side logic (e.g., memory controller inputs).
/BE0–/BE3	Individual Enable Inputs	Active-low controls per-channel conduction; enables selective isolation of individual data bits during hot-plug events.

Key Features

Feature	Design Value
Rail-to-rail analog switching	Supports full-swing 0–2.5V or 0–3.3V signals without clipping or distortion.
Hot-insertion capability	Prevents bus contention and ground bounce during live card insertion via high-impedance disable state.
5V-tolerant I/O	Allows connection to 5V peripherals without external clamping diodes or level shifters.
Low ON-capacitance (10pF)	Minimizes loading on driving sources and preserves edge rates in >200MHz digital signals.
Industry-standard 74XX125 pinout	Enables mechanical and logical drop-in replacement for legacy bus buffers in existing PCB layouts.

Applications

Memory Expansion Interface

PCIe Sideband Signal Switching

Use Scenario: Adding dual-channel LPDDR4 memory modules to a SoC-based edge AI module with shared address/control bus.

IC Role / Device Role / Timing Role: Bidirectional 4-bit bus switch isolating memory channel A/B under firmware control during runtime reconfiguration.

Use Value: Enables dynamic memory topology changes without power cycle, leveraging <6.5ns disable time to prevent metastability.

Use Scenario: Routing WAKE#, PERST#, and CLKREQ# signals between host CPU and hot-pluggable M.2 NVMe modules.

IC Role / Device Role / Timing Role: Individual-enable-controlled signal bridge ensuring glitch-free assertion/deassertion during PCIe link training.

Use Value: Eliminates need for discrete pull-up networks and avoids false resets during hot-dock sequences.

Industrial Hot-Swap Backplane

Test Access Port Multiplexing

Use Scenario: Isolating JTAG and UART debug ports across multiple field-replaceable compute blades in a 19-inch rack system.

IC Role / Device Role / Timing Role: 4-bit bidirectional switch enabling one debug host to access any blade's test interface via FPGA-configured /BE lines.

Use Value: Reduces connector count and PCB layer count by consolidating debug routing through shared backplane traces.

Use Scenario: Sharing a single SWD/JTAG probe across four microcontroller test points on a multi-core automotive ECU board.

IC Role / Device Role / Timing Role: Low-latency, low-R_ON switch selecting between ARM Cortex-M cores without signal degradation.

Use Value: Maintains SWD clock integrity up to 24MHz due to <5Ω R_ON and <10pF C_ON, avoiding protocol timeouts.

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
SN74CBT3125PWR	5V-only supply (4.5–5.5V); no 2.5V operation; 6Ω R_ON; active-high enables.	Requires level-shifting for 2.5V systems; unsuitable for hot-insertion due to lack of 5V-tolerant I/O in 2.5V mode.	Select only if design is 5V-only and enable polarity aligns with control logic.
PI3CH4812LE	8-bit, 3.3V-only supply; 8Ω R_ON; integrated ESD protection (±8kV HBM); same TSSOP-14 package.	Higher channel count but higher R_ON and no 2.5V support; better for ESD-sensitive environments.	Choose when 8-bit width and enhanced ESD are required, and 3.3V supply is fixed.

Compared with SN74CBT3125PWR and PI3CH4812LE, PI3C3125LE+DLX uniquely supports 2.5V operation with 5V I/O tolerance and active-low enables - making it optimal for mixed-voltage hot-plug subsystems where supply headroom and legacy compatibility are constrained.

Availability

PI3C3125LE+DLX is available at Aetrix Electronics and suitable for memory expansion interfaces, PCIe sideband routing, industrial hot-swap backplanes, and test access port multiplexing requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for PI3C3125LE+DLX 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, specializing in high-performance, energy-efficient components for industrial, computing, and communications markets.

The PI3C3125 series belongs to Diodes' Pericom high-speed interface product line, engineered specifically for low-latency, hot-pluggable signal routing in memory, storage, and modular computing architectures.

FAQ

What is the maximum operating frequency supported by PI3C3125LE+DLX?

The device supports signal bandwidth exceeding 400MHz, verified by S-parameter characterization and eye-diagram testing at 2.5V supply. This enables reliable switching of DDR2/DDR3 address/control signals and PCIe sideband clocks up to 100MHz fundamental with clean harmonics.

Can PI3C3125LE+DLX operate with a 3.3V supply?

Yes - the PI3C3125LE+DLX is fully specified for both 2.5V (±10%) and 3.3V (±10%) operation per DS40194 Rev 2-2. At 3.3V, R_ON drops to 4Ω typ., and I/O tolerance remains 5V, preserving compatibility across dual-supply platforms.

Is the PI3C3125LE+DLX pin-compatible with the PI3C3126 variant?

No - PI3C3125 uses a 14-pin TSSOP with /BE0–/BE3 on pins 1–4 and 11–14; PI3C3126 uses a 16-pin QSOP with BE0–BE3 on pins 1–4 and 13–16, plus two NC pins. Pinouts differ due to active-low vs. active-high enable polarity and package constraints.

Does PI3C3125LE+DLX require external pull-up resistors on /BE pins?

Yes - per the datasheet truth table note, a pull-up resistor is recommended on each /BE pin for power-up protection to ensure all switches remain disabled until firmware asserts a valid low-level enable, preventing unintended bus contention during startup.

PI3C3125LE+DLX Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 14-TSSOP (0.173", 4.40mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: Bus Switch

Circuit:: 4 x 1:1

Independent Circuits:: 4

Current - Output High, Low:: -

Voltage Supply Source:: Single Supply

Voltage - Supply:: 2.97V ~ 3.63V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-TSSOP

PI3C3125LE+DLX FAQ

1.How can I place an order for PI3C3125LE+DLX through Aetrix?

Please submit a Request for Quotation (RFQ) for PI3C3125LE+DLX 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 PI3C3125LE+DLX reliable?

The price and inventory of PI3C3125LE+DLX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI3C3125LE+DLX is usually 5 days.

3.What payment methods are accepted for PI3C3125LE+DLX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI3C3125LE+DLX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PI3C3125LE+DLX?

PI3C3125LE+DLX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PI3C3125LE+DLX 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 PI3C3125LE+DLX?

For technical support, including PI3C3125LE+DLX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI3C3125LE+DLX requirements.

6.How does Aetrix verify that PI3C3125LE+DLX is sourced from the original manufacturer or authorized distributors?

All PI3C3125LE+DLX 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 PI3C3125LE+DLX meets industry standards.

7.What is the process for return or replacement of PI3C3125LE+DLX?

All PI3C3125LE+DLX units undergo pre-shipment inspection (PSI). If there is an issue with PI3C3125LE+DLX, 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 PI3C3125LE+DLX part is unused and in its original packaging.

Return procedure for PI3C3125LE+DLX:

1.Submit a request within 90 days.

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

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