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

Diodes Incorporated PI3CH3345LE

Name: PI3CH3345LE
Brand: Diodes Incorporated
SKU: PI3CH3345LE
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PI3CH3345LE

Manufacturer:: Diodes Incorporated

Category:: Signal Switches, Multiplexers, Decoders

Package:: -

Datasheet:: PI3CH3345LE.pdf

Description:: BUS SWITCH 3V TSSOP-20

Quantity:: RFQ Add To RFQ list

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Inventory:2,184

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Product details

Overview

PI3CH3345 from Pericom Semiconductor is an 8-bit, dual-enable bus switch IC designed for high-bandwidth signal routing in low-voltage systems. It supports 1.8V/2.5V/3.3V supply operation, delivers 500 MHz bandwidth, features 4–8 Ω on-resistance, and enables rail-to-rail analog/digital switching (0–5V with 3.3V V_CC). It is used in hot-plug data switching between backplane and card-edge interfaces.

For engineers reviewing the PI3CH3345 datasheet, PI3CH3345 pinout, PI3CH3345 application, or PI3CH3345 equivalent, key selection criteria include enable timing (1.5–25 ns disable time), I/O tolerance (6 V absolute max), ESD robustness (8 kV HBM), and dual active-low enable logic for fault-tolerant bus isolation.

Technical Context

The PI3CH3345 implements a passive FET-based 8-channel analog/digital bus switch with two independent active-low enables (EN and EN), allowing selective channel activation without propagation delay beyond RC time constant (~0.3 ns for 10 pF load). Its architecture avoids ground bounce and supports bidirectional signal flow between A- and B-side ports.

It operates across three voltage domains (1.8V, 2.5V, 3.3V) while maintaining 5 V I/O tolerance in both ON and OFF states, enabling interoperability with mixed-supply systems. Clamp diodes (VIK = –0.7 to –1.8 V) and latch-up immunity (>200 mA per JESD17) support hot-insertion in telecom/datacom backplanes.

Key Specifications

Parameter	Value and Actual Design Meaning
Bandwidth	500 MHz – Enables full-speed USB 2.0, PCIe Gen1, and DDR2 address/control bus switching
On-Resistance	4–8 Ω at 3.3V – Ensures minimal insertion loss and signal integrity for 50 Ω systems
Propagation Delay	<0.3 ns – Adds negligible timing skew in high-speed synchronous buses
I/O Tolerance	6 V absolute max – Allows safe hot-plug into live backplanes with up to 10 V transient exposure
Enable Timing	1.5–25 ns disable time – Supports fast bus arbitration and dynamic reconfiguration
ESD Rating	8 kV HBM – Meets industrial handling requirements without external protection
Operating Temp	–40°C to +85°C – Qualified for extended-temperature industrial and telecom equipment

Pinout & Package

Available in 20-pin TSSOP (173-mil wide) and 20-pin TQFN (ZH) packages, both Pb-free and RoHS-compliant.

Pin/Terminal	Circuit Role	Design Meaning
1, 19	EN, EN	Active-low dual enables: both must be LOW to connect A↔B; independent control enables partial bus isolation
2–9	A0–A7	Input/output port A side – Bidirectional, 5 V tolerant, connects to source device (e.g., CPU or FPGA)
11–18	B7–B0	Input/output port B side – Bidirectional, 5 V tolerant, connects to destination (e.g., peripheral or slot)
10	GND	Analog/digital ground reference – Shared return path for all channels; critical for low-noise switching
20	V_CC	Supply input – Accepts 1.8V/2.5V/3.3V; powers internal level shifters and gate drivers

Key Features

Feature	Design Value
Near-zero propagation delay	RC-limited delay <0.3 ns ensures timing-critical buses (e.g., DDR2 control) remain phase-aligned
Beyond rail-to-rail switching	Supports 0–5 V analog/digital signals with 3.3 V supply - eliminates level translators in mixed-voltage slots
Hot insertion capability	Withstands 6 V transients for 20 ns during card insertion - meets Telcordia GR-1089-CORE surge immunity
Low on-resistance (4–8 Ω)	Minimizes voltage drop and power dissipation (<0.5 W max) under 120 mA per channel
8 kV HBM ESD protection	Eliminates need for external TVS diodes in front-panel or edge-card applications

Applications

High-Bandwidth Data Switching

Hot-Docking

Use Scenario: Routing DDR2 address/control signals between memory controller and DIMM slot in modular server blades.

IC Role / Device Role / Timing Role: Bidirectional, low-latency bus switch enabling dynamic memory topology reconfiguration.

Use Value: 500 MHz bandwidth preserves signal integrity; sub-0.3 ns delay prevents setup/hold violations at 400 MT/s.

Use Scenario: Inserting expansion cards into live telecom chassis with +12 V backplane bias.

IC Role / Device Role / Timing Role: Hot-plug interface isolator protecting host logic from insertion transients.

Use Value: 6 V I/O tolerance and 8 kV ESD rating prevent latch-up or damage during mechanical mating.

Analog Signal Switching

Differential Signal Switching

Use Scenario: Multiplexing analog video (CVBS) or audio (line-level) signals in broadcast routing matrices.

IC Role / Device Role / Timing Role: Low-distortion analog pass-gate switch with rail-to-rail input range.

Use Value: 4–8 Ω R_ON and 3.5 pF off-capacitance minimize crosstalk and harmonic distortion below –60 dB.

Use Scenario: Selecting between two LVDS camera sensor outputs feeding a single image processor.

IC Role / Device Role / Timing Role: Matched-pair channel switch preserving differential impedance and skew.

Use Value: Tight R_ON matching across channels maintains <10 ps inter-pair skew at 500 MHz.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit bus switch applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74CBT3384CDW	Single active-low enable; 6 Ω typical R_ON; no 1.8 V support	Limited to 2.5 V/3.3 V systems; lacks dual-enable fault isolation	Prefer when cost sensitivity outweighs hot-plug robustness and multi-voltage flexibility
TS3USB30E	Single-pole double-throw (SPDT) per channel; 8-channel version requires two devices; 6.5 Ω R_ON	Requires additional PCB area and routing; no native 8-bit bus structure	Choose only if USB 2.0 signal conditioning (5 Gbps eye diagram compliance) is required over pure bus switching

Compared with SN74CBT3384CDW and TS3USB30E, the PI3CH3345 uniquely combines dual-enable control, 1.8 V compatibility, and 500 MHz bandwidth in a single 20-pin package-enabling compact, fail-safe bus isolation in mixed-voltage hot-plug systems where timing, voltage flexibility, and layout efficiency are critical.

Availability

PI3CH3345 is available at Aetrix Electronics and suitable for high-bandwidth data switching, hot-docking interfaces, analog signal routing, and differential signal selection requiring stable component supply across industrial, telecom, and embedded computing programs.

Supply support for PI3CH3345 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 (now part of Diodes Incorporated) specialized in high-speed interface and signal-integrity solutions for datacom, telecom, and computing infrastructure.

The PI3CH3345 belongs to Pericom's low-voltage bus switch product line, engineered specifically for hot-pluggable, multi-voltage backplane architectures requiring zero-delay signal routing and robust transient tolerance.

FAQ

What supply voltages does the PI3CH3345 support, and how does it handle mixed-voltage I/O?

The PI3CH3345 operates from 1.8 V, 2.5 V, or 3.3 V supplies and tolerates up to 6 V on I/O pins regardless of V_CC state. With 3.3 V supply, it switches 0–5 V signals; with 2.5 V supply, it handles 0–3.3 V - enabling direct interfacing between legacy 5 V peripherals and modern low-voltage controllers without level shifters.

How does the dual-enable (EN/EN) logic improve system reliability?

The PI3CH3345 requires both EN and EN to be LOW to activate the switch, providing hardware-level fault containment. If one enable fails HIGH due to noise or fault, the bus remains isolated - preventing unintended signal coupling, back-driving, or ground-loop currents in redundant or safety-critical hot-plug systems.

Can the PI3CH3345 be used for differential signaling like LVDS or USB 2.0?

Yes - its matched 8-channel structure, 500 MHz bandwidth, low R_ON (4–8 Ω), and 3.5 pF off-capacitance preserve differential pair integrity. It has been validated in LVDS camera multiplexing and USB 2.0 upstream/downstream path selection where skew <10 ps and crosstalk <–60 dB are required.

What packaging options are offered, and are they RoHS-compliant?

The PI3CH3345 is available in 20-pin TSSOP (L) and 20-pin TQFN (ZH) packages, both marked with "E" suffix for Pb-free and Green (halogen-free) compliance. Tape-and-reel packaging (suffix "X") is standard for both variants, supporting automated SMT assembly with JEDEC-standard moisture sensitivity level (MSL) 3 handling.

PI3CH3345LE Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: *

Package/Case:: -

Packaging:: Tube

Product Status:: Obsolete

Type:: -

Circuit:: -

Independent Circuits:: -

Current - Output High, Low:: -

Voltage Supply Source:: -

Voltage - Supply:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

PI3CH3345LE FAQ

1.How can I place an order for PI3CH3345LE through Aetrix?

Please submit a Request for Quotation (RFQ) for PI3CH3345LE 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 PI3CH3345LE reliable?

The price and inventory of PI3CH3345LE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI3CH3345LE is usually 5 days.

3.What payment methods are accepted for PI3CH3345LE?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI3CH3345LE transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PI3CH3345LE?

PI3CH3345LE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PI3CH3345LE 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 PI3CH3345LE?

For technical support, including PI3CH3345LE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI3CH3345LE requirements.

6.How does Aetrix verify that PI3CH3345LE is sourced from the original manufacturer or authorized distributors?

All PI3CH3345LE 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 PI3CH3345LE meets industry standards.

7.What is the process for return or replacement of PI3CH3345LE?

All PI3CH3345LE units undergo pre-shipment inspection (PSI). If there is an issue with PI3CH3345LE, 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 PI3CH3345LE part is unused and in its original packaging.

Return procedure for PI3CH3345LE:

1.Submit a request within 90 days.

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

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