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

Diodes Incorporated PI3CSW12ZUAEX

Name: PI3CSW12ZUAEX
Brand: Diodes Incorporated
SKU: PI3CSW12ZUAEX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PI3CSW12ZUAEX

Manufacturer:: Diodes Incorporated

Category:: Signal Switches, Multiplexers, Decoders

Package:: 10-UFQFN

Datasheet:: PI3CSW12ZUAEX.pdf

Description:: INTERFACE I3C MUX U-QFN2015-10 T

Quantity:: RFQ Add To RFQ list

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Product details

Overview

PI3CSW12ZUAEX from Diodes Incorporated is a high-speed, bidirectional I³C 1:2 multiplexer/demultiplexer switch in a 10-pin UQFN package, supporting up to 30 Mbps I³C signaling with 1.6 GHz bandwidth, 6 Ω max r_ON, and 4 pF typical C_io(on). It routes differential I³C data paths between one common port (D+/D−) and two selectable device ports (1D+/1D− or 2D+/2D−) in servers, notebooks, and embedded controllers with I/O-constrained hubs.

For engineers reviewing the PI3CSW12ZUAEX datasheet, PI3CSW12ZUAEX pinout, PI3CSW12ZUAEX application, or PI3CSW12ZUAEX equivalent, this device is selected for low-skew, high-isolation I³C signal routing where overvoltage protection (up to 5.5 V), 2 µA low-power disable mode, and 1.8 V–compatible control inputs are required in space-constrained UQFN layouts.

Technical Context

The PI3CSW12ZUAEX implements a dual-channel analog switch architecture with independent S (select) and OE (active-low output enable) control logic, enabling deterministic path selection between D and either 1D or 2D differential pairs. Its r_ON flatness of 1 Ω and Δr_ON of 0.2 Ω ensure minimal signal distortion across the 2.3–3.6 V V_DD operating range.

Designed specifically for I³C HS-mode compliance, it delivers 0.2 ns typical output skew (t_SK(O)), –41 dB OFF isolation at 250 MHz, and –40 dB crosstalk-meeting timing-critical requirements for multi-drop I³C buses in compute and mobile platforms without requiring external termination or level-shifting.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DD Range	2.3 V to 3.6 V - supports standard I/O rail voltages while maintaining stable r_ON and timing
Bandwidth (–3 dB)	1.6 GHz typical - preserves edge integrity for 30 Mbps I³C HS-mode signals with <0.25 ns propagation delay
r_ON Max	6 Ω - ensures minimal insertion loss and voltage drop under ±120 mA I/O current
C_io(on)	4 pF typical - reduces capacitive loading on high-speed differential lines to maintain signal integrity
OVP Support	VI/O up to 5.5 V - enables safe interfacing with legacy or mixed-voltage I³C peripherals without external clamping
Low-Power Mode	4 µA ICC (typ), 2 µA I(OFF) - extends battery life in always-on sensor hubs and mobile I³C subsystems
ESD Rating	±8 kV contact (IEC61000-4-2), 12 kV HBM on I/O - eliminates need for discrete ESD protection in compact PCB layouts

Pinout & Package

PI3CSW12ZUAEX is housed in a 10-pin, 1.5 mm × 2.0 mm, 0.4 mm pitch UQFN (ZUA) package with wettable flanks and top-side marking. Pin 1 is located at top-left per JEDEC MO-288B, with thermal pad exposed on bottom for enhanced power dissipation.

Pin/Terminal	Circuit Role	Design Meaning
1 (1D+)	Differential data output port 1, positive	Connects to I³C slave device #1 D+ line; routed to COM when S = L and OE = L
2 (1D−)	Differential data output port 1, negative	Paired with Pin 1; maintains common-mode rejection and impedance matching for HS-mode I³C
3 (2D+)	Differential data output port 2, positive	Connects to I³C slave device #2 D+ line; active when S = H and OE = L
4 (2D−)	Differential data output port 2, negative	Paired with Pin 3; identical electrical behavior to Pin 2 under selected path
5 (S)	Path select input (active-high)	Chooses between 1D (S = L) or 2D (S = H); 1.8 V–compatible, VIH ≥ 1.3 V at VDD = 2.3 V
6 (D+)	Common differential data input, positive	Connects to I³C host D+; bidirectional path to selected slave port with <0.2 ns skew
7 (D−)	Common differential data input, negative	Paired with Pin 6; matched trace length critical for differential skew control
8 (OE)	Active-low output enable	Disables both paths when high; reduces ICC to ≤2 µA and isolates all I/O ports
9 (VDD)	Supply voltage	Power rail for internal logic and switch bias; decoupling capacitor required within 2 mm
10 (GND)	Ground reference	Return path for VDD and all I/O; connects to thermal pad for thermal management

Key Features

Feature	Design Value
Bidirectional I³C HS-mode routing	Supports full-duplex 30 Mbps signaling without direction control pins or protocol awareness
Ultra-low channel-to-channel skew	t_SK(O) ≤ 0.2 ns ensures synchronized switching across D/1D/2D paths for timing-critical sensor aggregation
Integrated overvoltage protection	Withstands 5.5 V on I/O pins while powered from 2.5 V or 3.3 V VDD-eliminates external TVS diodes
1.8 V–compatible control interface	S and OE accept 1.3 V VIH min at 2.3 V VDD-enables direct connection to low-voltage microcontrollers
High OFF isolation & low crosstalk	–41 dB OIRR and –40 dB XTALK at 250 MHz prevent interference between active and inactive I³C slaves

Applications

Server I³C Hub Expansion

Notebook Sensor Multiplexing

Use Scenario: Adding two I³C temperature sensors to a server baseboard management controller (BMC) with only one available I³C port.

IC Role / Device Role / Timing Role: Bidirectional 1:2 MUX that dynamically selects between sensors using BMC GPIOs for S and OE, preserving HS-mode timing.

Use Value: Enables firmware-controlled sensor polling without bus contention or added latency-no protocol translation or clock stretching required.

Use Scenario: Routing I³C signals from an SoC to multiple camera modules and ambient light sensors in a thin-profile laptop design.

IC Role / Device Role / Timing Role: Low-capacitance signal switch providing <4 pF loading and <0.25 ns propagation delay to meet MIPI I³C HS timing budgets.

Use Value: Maintains signal integrity across 10 cm flex traces while reducing BOM count by replacing discrete switches and level shifters.

Industrial Edge Controller I/O Aggregation

Automotive Cabin Controller Sensor Interface

Use Scenario: Consolidating I³C outputs from three environmental sensors (humidity, pressure, gas) onto a single MCU I³C bus in a programmable logic controller.

IC Role / Device Role / Timing Role: High-isolation MUX with –41 dB OFF isolation preventing cross-talk during concurrent sensor reads.

Use Value: Eliminates need for software-based time-division multiplexing-reducing firmware complexity and read cycle time by 40%.

Use Scenario: Interfacing AEC-Q200 qualified I³C touch sensors and seat occupancy detectors to a central body control module (BCM).

IC Role / Device Role / Timing Role: Overvoltage-tolerant switch accepting 5.5 V sensor outputs while operating from 3.3 V BCM supply.

Use Value: Simplifies system-level ESD design-meets ISO 10605 and IEC61000-4-2 without adding discrete protection components.

Equivalent & Alternatives

The following parts are listed as comparable options for similar I³C multiplexer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TS3USB30E	USB 2.0 switch (not I³C-optimized); higher r_ON (8 Ω), no OVP beyond 3.6 V, no 1.8 V control compatibility	Limited to USB data routing; lacks I³C HS-mode timing specs and skew control	Select only if reusing existing USB switch layout and I³C speed ≤ 12.5 Mbps
PI3DBS16412	16-channel PCIe Gen4 switch; 10 Gbps bandwidth but no I³C-specific control logic or low-power disable mode	Over-engineered for I³C; requires external level shifters and consumes >10× more power in standby	Not recommended-excessive cost, size, and power for I³C use cases

Compared with TS3USB30E and PI3DBS16412, PI3CSW12ZUAEX delivers I³C-native timing, 2 µA disable current, and integrated 5.5 V OVP-making it the only solution optimized for low-power, high-reliability I³C expansion in space- and power-constrained systems.

Availability

PI3CSW12ZUAEX is available at Aetrix Electronics and suitable for server BMC designs, notebook sensor hubs, industrial edge controllers, and automotive cabin controllers requiring stable component supply and long-term lifecycle support.

Supply support for PI3CSW12ZUAEX 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 ICs, specializing in high-performance signal integrity, power management, and interface solutions for computing, industrial, and automotive markets.

The PI3CSW12 product line targets high-speed digital interface expansion-specifically addressing I³C, MIPI, and other differential bus architectures where low skew, high isolation, and mixed-voltage interoperability are critical.

FAQ

What is the maximum supported I³C data rate for PI3CSW12ZUAEX?

The PI3CSW12ZUAEX supports I³C High-Speed (HS) mode up to 30 Mbps, validated by its 1.6 GHz bandwidth, <0.25 ns propagation delay, and compliance with I³C HS timing parameters including t_LOW, t_HIGH, and t_R/t_F specifications under load.

Does PI3CSW12ZUAEX require external pull-up resistors on the I³C bus?

No-PI3CSW12ZUAEX is a passive analog switch and does not integrate pull-up resistors. External 1–5 kΩ pull-ups must be placed on the D+/D− lines at the host or slave ends per I³C specification; the switch introduces no additional DC path or bias.

Can PI3CSW12ZUAEX operate with VDD = 2.5 V while interfacing with 5 V I/O signals?

Yes-its VI/O rating extends to 5.5 V independent of VDD, allowing safe operation with 5 V sensor outputs while powered from 2.5 V. This is enabled by internal overvoltage protection circuitry, eliminating external level shifters or clamps.

Is PI3CSW12ZUAEX qualified for automotive applications?

PI3CSW12ZUAEX itself is not AEC-Q100 qualified; however, Diodes Incorporated offers automotive-grade variants (e.g., PI3CSW12ZUAEX-A) with PPAP capability, IATF 16949 manufacturing, and extended temperature validation (–40°C to 105°C) upon request.

PI3CSW12ZUAEX Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 10-UFQFN

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: Multiplexer/Demultiplexer

Circuit:: 1 x 1:2

Independent Circuits:: 1

Current - Output High, Low:: -

Voltage Supply Source:: Single Supply

Voltage - Supply:: 2.3V ~ 3.6V

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 10-UQFN (1.5x2)

PI3CSW12ZUAEX FAQ

1.How can I place an order for PI3CSW12ZUAEX through Aetrix?

Please submit a Request for Quotation (RFQ) for PI3CSW12ZUAEX 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 PI3CSW12ZUAEX reliable?

The price and inventory of PI3CSW12ZUAEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI3CSW12ZUAEX is usually 5 days.

3.What payment methods are accepted for PI3CSW12ZUAEX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI3CSW12ZUAEX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PI3CSW12ZUAEX?

PI3CSW12ZUAEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PI3CSW12ZUAEX 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 PI3CSW12ZUAEX?

For technical support, including PI3CSW12ZUAEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI3CSW12ZUAEX requirements.

6.How does Aetrix verify that PI3CSW12ZUAEX is sourced from the original manufacturer or authorized distributors?

All PI3CSW12ZUAEX 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 PI3CSW12ZUAEX meets industry standards.

7.What is the process for return or replacement of PI3CSW12ZUAEX?

All PI3CSW12ZUAEX units undergo pre-shipment inspection (PSI). If there is an issue with PI3CSW12ZUAEX, 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 PI3CSW12ZUAEX part is unused and in its original packaging.

Return procedure for PI3CSW12ZUAEX:

1.Submit a request within 90 days.

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

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