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

Diodes Incorporated PI3CH3305LEX

Name: PI3CH3305LEX
Brand: Diodes Incorporated
SKU: PI3CH3305LEX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PI3CH3305LEX

Manufacturer:: Diodes Incorporated

Category:: Signal Switches, Multiplexers, Decoders

Package:: 8-TSSOP (0.173", 4.40mm Width)

Datasheet:: PI3CH3305LEX.pdf

Description:: IC BUS SWITCH 1 X 1:1 8TSSOP

Quantity:: RFQ Add To RFQ list

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Inventory:2,500

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Product details

Overview

PI3CH3305LEX from Pericom Semiconductor is a 2-bit, high-bandwidth bus switch with active-high enable, supporting 1.8V/2.5V/3.3V supply operation, 500 MHz bandwidth, <0.3 ns propagation delay, and 5 Ω typical on-resistance. It enables hot-plug-capable signal routing in high-speed data paths such as PCIe lanes, USB 2.0 interconnects, and differential LVDS switching.

For engineers reviewing the PI3CH3305LEX datasheet, PI3CH3305LEX pinout, PI3CH3305LEX application, or PI3CH3305LEX equivalent, key selection criteria include rail-to-rail analog switching capability (0–5 V with 3.3 V supply), 8 kV HBM ESD rating, industrial temperature range (–40°C to +85°C), and dual-package availability (TSSOP-8 and MSOP-8).

Technical Context

The PI3CH3305LEX implements two independent, bidirectional, low-R_ON CMOS transmission gates controlled by a single active-high enable input per channel. Each switch operates without introducing ground bounce or added propagation delay beyond its intrinsic RC time constant (~0.3 ns for 10 pF load).

It supports beyond-rail analog switching: 0–5 V signals with 3.3 V supply, 0–3.3 V with 2.5 V supply, and tolerates 5 V I/O regardless of supply state (ON/OFF). Input logic thresholds scale with V_CC, enabling interoperability across mixed-voltage systems.

Key Specifications

Parameter	Value and Actual Design Meaning
Bandwidth	500 MHz – Enables full-speed switching of USB 2.0 (480 Mbps) and PCIe Gen1 (2.5 GT/s) signals without attenuation.
On-Resistance (R_ON)	4–8 Ω at 2.5 V / 1.8 V – Ensures minimal voltage drop and signal integrity degradation under 48 mA load.
Propagation Delay	<0.3 ns – Adds negligible timing skew in high-speed serial or parallel bus applications.
Supply Voltage Range	1.8 V / 2.5 V / 3.3 V – Supports multi-rail system integration without level shifters.
ESD Rating	8 kV HBM – Provides robust handling during board assembly and hot-insertion events.
Operating Temperature	–40°C to +85°C – Validated for industrial-grade embedded and telecom equipment deployment.

Pinout & Package

PI3CH3305LEX is packaged in an 8-pin TSSOP (Lead-free & Green, JEDEC MO-153 compliant), with 0.65 mm pitch and exposed pad not present. Pinout matches standard TSSOP-8 footprint and is identical to PI3CH3305LE.

Pin/Terminal	Circuit Role	Design Meaning
1, 7	EN1, EN2	Active-high enable inputs - independently control each 2-bit channel; driven HIGH to connect A↔B paths.
2, 5	A1, A2	Input/output port A side - bidirectional analog/digital signal terminals connected through switch when enabled.
3, 6	B1, B2	Input/output port B side - mirror of A ports; forms two independent A-B signal paths.
4	GND	Ground reference - must be low-impedance connection to minimize noise coupling into high-frequency paths.
8	V_CC	Power supply input - accepts 1.8 V, 2.5 V, or 3.3 V; powers internal logic and switch transistors.

Key Features

Feature	Design Value
Rail-to-rail analog switching	Supports 0–5 V signal swing with 3.3 V supply - eliminates need for external biasing in mixed-signal backplane interfaces.
Hot-insertion capability	Withstands 6 V transient at pins for ≤20 ns - enables safe live insertion into powered backplanes in telecom line cards.
Low capacitive loading	7.0 pF ON-state capacitance - preserves signal rise/fall times and minimizes reflections in >100 MHz traces.
5 V I/O tolerant	Inputs/outputs remain functional and undamaged with 5 V applied while V_CC = 0 V or active - simplifies power sequencing design.
Latch-up immunity	>200 mA per JESD17 - ensures robustness against transient current surges in noisy industrial environments.

Applications

PCIe Gen1 Lane Switching

USB 2.0 Port Multiplexing

Use Scenario: Dynamic reconfiguration of PCIe x1 lanes between CPU and peripheral slots in modular server blades.

IC Role / Device Role / Timing Role: Bidirectional, low-latency signal path selector enabling lane reallocation without reset or firmware intervention.

Use Value: Maintains full 2.5 GT/s data rate with <0.3 ns added skew and no DC blocking, preserving link training integrity.

Use Scenario: Sharing a single USB 2.0 controller between two host-facing ports in docking stations.

IC Role / Device Role / Timing Role: High-fidelity analog switch isolating D+/D− pairs during port arbitration to prevent signal contention.

Use Value: 500 MHz bandwidth and 5 Ω R_ON preserve eye diagram integrity at 480 Mbps; hot-plug tolerance prevents damage during cable insertion.

Differential LVDS Video Routing

Industrial Backplane Signal Bridging

Use Scenario: Selecting between two LVDS video sources (e.g., camera and display controller) feeding a single FPGA input bank.

IC Role / Device Role / Timing Role: Low-skew, matched-pair analog switch maintaining differential impedance and common-mode range.

Use Value: 7.0 pF C_ON and sub-0.3 ns delay ensure <1% jitter addition at 100 MHz pixel clocks; rail-to-rail support handles 0–3.3 V LVDS swings.

Use Scenario: Isolating legacy parallel bus segments (e.g., ISA or CompactPCI) during hot-swap of mezzanine cards.

IC Role / Device Role / Timing Role: Voltage-tolerant, low-R_ON isolation gate preventing backfeeding and ground loop formation.

Use Value: 5 V I/O tolerance and –40°C to +85°C operation allow direct placement on backplane edge connectors; 8 kV ESD protects against field-induced transients.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 2-bit bus switch applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TS3A227EYZR	Single-supply only (2.3–3.6 V); 6 Ω R_ON; 300 MHz bandwidth; no 1.8 V support.	Lacks 1.8 V operation and 500 MHz bandwidth - unsuitable for low-voltage high-speed designs like mobile baseband interfaces.	Prefer PI3CH3305LEX where 1.8 V compatibility, 500 MHz, or hot-plug robustness are required.
SN74CBTLV3245APW	Octal (8-bit), not 2-bit; 3.3 V only; 4 Ω R_ON; 350 MHz bandwidth; no 5 V I/O tolerance.	Higher channel count but fixed 3.3 V supply and lower bandwidth - better for wide-bus buffering than precision 2-channel routing.	Choose PI3CH3305LEX for compact 2-channel, multi-supply, or hot-plug-critical use cases.

Compared with TS3A227EYZR and SN74CBTLV3245APW, the PI3CH3305LEX uniquely combines 1.8/2.5/3.3 V flexibility, 500 MHz bandwidth, 5 V I/O tolerance, and hot-plug resilience - making it optimal for space-constrained, multi-voltage, high-reliability signal routing.

Availability

PI3CH3305LEX is available at Aetrix Electronics and suitable for PCIe lane switching, USB 2.0 multiplexing, and industrial backplane bridging requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for PI3CH3305LEX 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

Pericom Semiconductor (acquired by Diodes Incorporated in 2016) specialized in high-speed interface ICs, clock management, and signal-integrity solutions for datacom, telecom, and computing markets.

The PI3CH3305LEX belongs to Pericom's CH-series low-voltage bus switch family, engineered specifically for hot-plug-capable, high-bandwidth analog/digital signal routing in dense, mixed-voltage PCB layouts.

FAQ

Can PI3CH3305LEX operate with 1.8 V supply while switching 3.3 V signals?

No. The device supports "beyond rail-to-rail" switching only within defined supply–signal combinations: 0–5 V signals require ≥3.3 V supply; 0–3.3 V signals require ≥2.5 V supply. With 1.8 V supply, maximum signal swing is 0–1.8 V. This limitation is specified in the Absolute Maximum Ratings and Electrical Characteristics tables for each V_CC condition.

Is PI3CH3305LEX pin-compatible with PI3CH3305UE (MSOP-8 package)?

Yes. Both PI3CH3305LEX (TSSOP-8) and PI3CH3305UE (MSOP-8) share identical pin numbering, function mapping, and electrical specifications. The only difference is package type and thermal characteristics - TSSOP offers higher power dissipation margin (0.5 W vs. 0.35 W for MSOP), making it preferred for sustained high-current operation.

Does PI3CH3305LEX require external pull-up or pull-down resistors on EN pins?

No. The EN inputs have CMOS-compatible thresholds that scale with V_CC (e.g., VIH = 1.2 V min at 1.8 V supply). Driving EN directly from a compatible logic source (e.g., FPGA GPIO, microcontroller output) is sufficient. External resistors are unnecessary unless needed for specific power-up default states in system-level reset sequencing.

What is the maximum continuous current per switch channel?

The absolute maximum DC output current is 120 mA per channel, as stated in the Maximum Ratings table. However, the recommended operating limit is 48 mA (per R_ON test condition), ensuring thermal stability and maintaining R_ON ≤ 8 Ω across temperature. Sustained operation above 48 mA may increase junction temperature and degrade long-term reliability.

PI3CH3305LEX Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 8-TSSOP (0.173", 4.40mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: Bus Switch

Circuit:: 1 x 1:1

Independent Circuits:: 2

Current - Output High, Low:: -

Voltage Supply Source:: Single Supply

Voltage - Supply:: 2.25V ~ 3.6V

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-TSSOP

PI3CH3305LEX FAQ

1.How can I place an order for PI3CH3305LEX through Aetrix?

Please submit a Request for Quotation (RFQ) for PI3CH3305LEX 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 PI3CH3305LEX reliable?

The price and inventory of PI3CH3305LEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI3CH3305LEX is usually 5 days.

3.What payment methods are accepted for PI3CH3305LEX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI3CH3305LEX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PI3CH3305LEX?

PI3CH3305LEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PI3CH3305LEX 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 PI3CH3305LEX?

For technical support, including PI3CH3305LEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI3CH3305LEX requirements.

6.How does Aetrix verify that PI3CH3305LEX is sourced from the original manufacturer or authorized distributors?

All PI3CH3305LEX 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 PI3CH3305LEX meets industry standards.

7.What is the process for return or replacement of PI3CH3305LEX?

All PI3CH3305LEX units undergo pre-shipment inspection (PSI). If there is an issue with PI3CH3305LEX, 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 PI3CH3305LEX part is unused and in its original packaging.

Return procedure for PI3CH3305LEX:

1.Submit a request within 90 days.

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

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