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

Diodes Incorporated PI3B3861LE

Name: PI3B3861LE
Brand: Diodes Incorporated
SKU: PI3B3861LE
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PI3B3861LE

Manufacturer:: Diodes Incorporated

Category:: Signal Switches, Multiplexers, Decoders

Package:: 24-TSSOP (0.173", 4.40mm Width)

Datasheet:: PI3B3861LE.pdf

Description:: IC BUS SWITCH 10 X 1:1 24TSSOP

Quantity:: RFQ Add To RFQ list

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Inventory:1,407

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Product details

Overview

PI3B3861LE from Pericom Semiconductor is a 3.3V, 10-bit, 2-port bus switch with 5Ω on-resistance, active-low Bus Enable (BE) control, 4.5ns max switching time, and ultra-low 0.1μA quiescent current-designed for high-speed signal routing in notebook memory buses.

For engineers reviewing the PI3B3861LE datasheet, PI3B3861LE pinout, PI3B3861LE application, or PI3B3861LE equivalent, key selection criteria include guaranteed 5Ω R_ON, rail-to-rail logic input tolerance up to +3.6V, near-zero propagation delay contribution, and QSOP-24 packaging compatibility with space-constrained portable systems.

Technical Context

The PI3B3861LE implements ten independent bilateral analog switches controlled by a single active-low BE signal, enabling simultaneous connection or isolation of A0–A9 and B0–B9 ports. Its CMOS design ensures no added ground bounce or propagation delay beyond RC time constant (~0.25ns for 50pF load).

It operates across –40°C to +85°C ambient with V_CC = 3.3V ±10%, supports TTL-level logic inputs regardless of supply voltage (up to +3.6V), and features clamp diodes (V_IK = –1.2V) for ESD protection on all I/O pins.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC	3.3V ±10% - defines compatible power rail and noise margin for low-voltage system integration
R_ON	5Ω typical - enables direct connection of high-speed digital signals without signal degradation
t_SW	4.5ns max - ensures sub-nanosecond switching for DDR/SDRAM address/data bus isolation
I_Q	0.1μA typical - reduces standby power in battery-powered notebooks and portable devices
C_IN	3.0pF - minimizes capacitive loading on driving logic, preserving signal integrity
VIH/VIL	2.0V / 0.8V - guarantees reliable logic recognition even with marginal driver output swing
Operating Temp	–40°C to +85°C - validated for industrial-grade embedded and mobile computing environments

Pinout & Package

Package: 24-pin QSOP (150-mil wide), Pb-free & RoHS-compliant, body dimensions 3.99mm × 8.74mm × 1.75mm (L × W × H), 0.635mm pitch.

Pin/Terminal	Circuit Role	Design Meaning
BE	Active-low bus enable control	Drives all 10 switches ON when LOW; isolates A/B ports when HIGH
A0–A9	Port A data terminals	Bidirectional I/O pins connected to source-side bus (e.g., CPU/memory controller)
B0–B9	Port B data terminals	Bidirectional I/O pins connected to destination-side bus (e.g., SDRAM module)
V_CC	Positive supply	3.3V power input with decoupling required within 1cm of pin 12
GND	Ground reference	Common return path for all internal logic and switch conduction paths
NC	No-connect	Pin 1 is unconnected; must remain floating or grounded per layout guidelines

Key Features

Feature	Design Value
Near-zero propagation delay contribution	RC time constant <0.25ns (5Ω × 50pF) - avoids timing skew in synchronous memory interfaces
Rail-to-rail logic input tolerance	Inputs accept 0V to +3.6V regardless of V_CC - simplifies level-shifting between mixed-voltage subsystems
Ultra-low quiescent current	0.1μA typical - extends battery life in always-on notebook standby modes
Clamp diode protection	V_IK = –1.2V - suppresses negative transients during hot-plug or ESD events
QSOP-24 footprint	Standard 150-mil width - enables drop-in replacement in legacy designs using PI3B3245/PI3B3257 footprints

Applications

DDR Memory Bus Isolation

Notebook Display Interface Switching

Use Scenario: Isolating CPU address/data lines from SDRAM during power-down sequences to prevent leakage current and bus contention.

IC Role / Device Role / Timing Role: Bidirectional 10-bit bus switch enabling/disabling memory channel connectivity under firmware control.

Use Value: Eliminates need for discrete MOSFET arrays while maintaining <5Ω signal path resistance and <4.5ns switching latency.

Use Scenario: Routing LVDS or FPD-Link video data between GPU and dual-panel displays in clamshell laptops.

IC Role / Device Role / Timing Role: High-speed analog switch managing display port multiplexing without introducing jitter or skew.

Use Value: Preserves signal integrity via 3.0pF input capacitance and 16.0pF on-state capacitance, minimizing eye diagram degradation.

PCI Express Lane Sharing

Embedded Controller Debug Port Multiplexing

Use Scenario: Sharing PCIe x1 lanes between Wi-Fi module and Bluetooth coexistence circuitry in ultrabook platforms.

IC Role / Device Role / Timing Role: Low-latency bidirectional switch enabling dynamic reconfiguration of high-speed serial links.

Use Value: Achieves 4.5ns max enable/disable timing-fast enough to support PCIe L1 substate transitions without link reset.

Use Scenario: Selecting between JTAG and SWD debug interfaces on ARM-based SoC development boards.

IC Role / Device Role / Timing Role: Logic-controlled signal router allowing single debug header to serve multiple protocol modes.

Use Value: Reduces PCB layer count by replacing mechanical DIP switches with 0.1μA static power consumption.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 10-bit bus switch applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
PI3B3245LEX	8-bit, same R_ON (5Ω), identical QSOP-20 package	Limited to 8-bit buses; lacks two address/data lines	Select when system requires only 8-bit isolation and board space is constrained
SN74CBT3245APW	8-bit, 5V-tolerant inputs, higher R_ON (7Ω), TSSOP-20	Supports mixed 3.3V/5V I/O but adds 2Ω conduction loss and 0.5ns delay penalty	Choose for legacy 5V-compatible designs where voltage translation is needed

Compared with PI3B3861LE, PI3B3245LEX offers footprint compatibility at reduced bit-width, while SN74CBT3245APW trades off on-resistance and speed for broader voltage interoperability-making PI3B3861LE optimal for compact, high-fidelity 10-bit 3.3V memory routing.

Availability

PI3B3861LE is available at Aetrix Electronics and suitable for DDR memory bus isolation, notebook display interface switching, and PCIe lane sharing requiring stable component supply and long-term lifecycle assurance.

Supply support for PI3B3861LE 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 computing and communications markets.

The PI3B3861LE belongs to Pericom's NanoSwitch™ family-engineered specifically for low-R_ON, low-capacitance, low-power bus switching in portable and space-constrained embedded systems.

FAQ

What is the maximum allowable input voltage on BE, A0–A9, or B0–B9 pins?

The PI3B3861LE accepts logic inputs from 0V to +3.6V regardless of V_CC level, enabling direct interfacing with 3.3V or 5V drivers without external level shifters. This rail-to-rail input tolerance is specified in the Absolute Maximum Ratings table and verified across temperature.

Does the device introduce measurable propagation delay in signal paths?

No-the PI3B3861LE contributes negligible propagation delay beyond the RC time constant of its 5Ω on-resistance and load capacitance (e.g., ~0.25ns for 50pF). System-level delay is dominated by driving and receiving circuits, not the switch itself, as confirmed in the Switching Characteristics section.

Can PI3B3861LE be used in hot-swap applications?

Yes-its built-in clamp diodes (V_IK = –1.2V) and specified absolute maximum ratings for input voltage (–0.5V to +4.6V) support controlled hot-plug operation. However, proper power sequencing (V_CC/GND applied before signals) is mandatory to avoid latch-up, per Applications Information.

Is there a lead-free and RoHS-compliant version available?

Yes-the PI3B3861LE is manufactured in Pb-free & Green (RoHS-compliant) QSOP-24 packaging, as confirmed in the Ordering Information table (code PI3B3861QE). Pericom's packaging documentation (PD-1203, Rev H) certifies full compliance with JEDEC MO-137B/AE standards.

PI3B3861LE Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 24-TSSOP (0.173", 4.40mm Width)

Packaging:: Tube

Product Status:: Obsolete

Type:: Bus Switch

Circuit:: 10 x 1:1

Independent Circuits:: 1

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:: 24-TSSOP

PI3B3861LE FAQ

1.How can I place an order for PI3B3861LE through Aetrix?

Please submit a Request for Quotation (RFQ) for PI3B3861LE 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 PI3B3861LE reliable?

The price and inventory of PI3B3861LE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI3B3861LE is usually 5 days.

3.What payment methods are accepted for PI3B3861LE?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI3B3861LE transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PI3B3861LE?

PI3B3861LE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PI3B3861LE 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 PI3B3861LE?

For technical support, including PI3B3861LE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI3B3861LE requirements.

6.How does Aetrix verify that PI3B3861LE is sourced from the original manufacturer or authorized distributors?

All PI3B3861LE 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 PI3B3861LE meets industry standards.

7.What is the process for return or replacement of PI3B3861LE?

All PI3B3861LE units undergo pre-shipment inspection (PSI). If there is an issue with PI3B3861LE, 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 PI3B3861LE part is unused and in its original packaging.

Return procedure for PI3B3861LE:

1.Submit a request within 90 days.

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

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