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Home > Products > Integrated Circuits (ICs) > Logic > Translators, Level Shifters

Diodes Incorporated PI6ULS5V9306UEX

Name: PI6ULS5V9306UEX
Brand: Diodes Incorporated
SKU: PI6ULS5V9306UEX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PI6ULS5V9306UEX

Manufacturer:: Diodes Incorporated

Category:: Translators, Level Shifters

Package:

Datasheet:: PI6ULS5V9306UEX.pdf

Description:: IC TRANSLTR BIDIRECTIONAL 8SOIC

Quantity:: RFQ Add To RFQ list

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Inventory:1,516

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Product details

Overview

PI6ULS5V9306 from Diodes Incorporated is a dual bidirectional I²C-bus and SMBus voltage-level translator with enable control, supporting 0.9 V–3.3 V (VREF1) and 1.8 V–5 V (VREF2) domains, ≤1.5 ns max propagation delay, 3.5 Ω typical ON-state resistance, and 4 kV HBM ESD rating. It enables seamless interconnection between mixed-voltage microcontrollers and sensors in embedded power management systems.

For engineers reviewing the PI6ULS5V9306 datasheet, PI6ULS5V9306 pinout, PI6ULS5V9306 application, or PI6ULS5V9306 equivalent, key selection criteria include bidirectional translation without direction pin, open-drain I/O compatibility with standard/fast/fast-plus I²C, EN-controlled isolation, flow-through pinout for PCB routing, and VREF1/VREF2 voltage flexibility across 0.9 V–5 V combinations.

Technical Context

The PI6ULS5V9306 implements passive MOSFET-based clamping architecture to achieve directionless bidirectional level shifting: when either SDA1 or SDA2 is pulled low, the internal switch conducts, establishing a low-R_ON path (<5.5 Ω) between ports while limiting voltage on the low-side to VREF1. Its symmetrical channel design ensures matched t_PLH/t_PHL (≤1.4 ns) across SCL/SDA pairs under varying VREF conditions.

EN logic controls conduction state: HIGH enables translation with <10.5 pF on-state capacitance; LOW forces high-impedance isolation on all four I/O pins (SCL1/SDA1/SCL2/SDA2), preventing bus contention and enabling lock-up-free multi-master arbitration. The device operates across -40°C to +85°C with no external direction control or timing overhead.

Key Specifications

Parameter	Value and Actual Design Meaning
VREF1 Range	0.9 V to 3.3 V - sets low-voltage domain reference for SCL1/SDA1 pullup and logic thresholds
VREF2 Range	1.8 V to 5 V - sets high-voltage domain reference for SCL2/SDA2 pullup and 5 V-tolerant I/O operation
Max Propagation Delay	≤1.5 ns - preserves signal integrity for standard-mode (100 kHz) and fast-mode (400 kHz) I²C timing budgets
ON-State Resistance	3.5 Ω typ - minimizes voltage drop and distortion during active translation, critical for low-VOL compliance
ESD Rating	4 kV HBM - protects downstream 0.9 V logic from ESD events on 5 V bus side without external TVS
Operating Temp	-40°C to +85°C - supports industrial temperature range without derating or thermal shutdown
I/O Type	Open-drain - compatible with standard I²C pullup topologies and SMBus-compatible devices

Pinout & Package

Available in multiple 8-pin packages including MSOP (U), SOIC (W), VSSOP (V), SSOP (SS), SOT28 (TA), and X2-DFN (HK); all share identical pin mapping and flow-through layout optimized for minimal trace stubs.

Pin/Terminal	Circuit Role	Design Meaning
1 GND	Ground reference	Common 0 V return for both VREF domains; must be low-inductance connection to minimize noise coupling
2 VREF1	Low-side supply reference	Sets logic thresholds and pullup voltage for SCL1/SDA1; must be stable and decoupled
3 SCL1	Low-voltage I²C clock	Open-drain input/output tied to VREF1 pullup; bidirectionally translated to SCL2 when EN = HIGH
4 SDA1	Low-voltage I²C data	Open-drain input/output tied to VREF1 pullup; bidirectionally translated to SDA2 when EN = HIGH
5 SDA2	High-voltage I²C data	Open-drain input/output tied to VREF2 pullup; 5 V tolerant; isolated when EN = LOW
6 SCL2	High-voltage I²C clock	Open-drain input/output tied to VREF2 pullup; 5 V tolerant; isolated when EN = LOW
7 VREF2	High-side supply reference	Sets logic thresholds and pullup voltage for SCL2/SDA2; powers EN input via internal biasing
8 EN	Enable control input	Active-HIGH logic; connects to VREF2 (not VREF1); disables all I/O paths to high-Z when LOW

Key Features

Feature	Design Value
No direction pin required	Enables automatic bidirectional translation using passive clamping-eliminates GPIO overhead and firmware complexity
Flow-through pinout	Linear SCL1–SDA1–SDA2–SCL2 arrangement minimizes crossing traces and reduces parasitic capacitance on high-speed I²C lines
5 V-tolerant I/O ports	Allows direct interface to 5 V microcontrollers or peripherals without external level-shifting components on high-side bus
Lock-up free isolation	EN = LOW places all four I/O pins in true high-impedance state-prevents bus contention during hot-swap or power sequencing
Low 3.5 Ω R_ON	Maintains VOL < 0.4 V at 15 mA sink current-ensures reliable logic LOW detection across full VREF1/VREF2 operating ranges

Applications

Industrial Sensor Hub

Automotive Body Control Module

Use Scenario: Interfacing 1.2 V MEMS accelerometers and 3.3 V MCU in a factory-floor vibration monitor.

IC Role / Device Role / Timing Role: Bidirectional I²C translator isolating low-voltage sensor domain from higher-voltage host controller while preserving 400 kHz fast-mode timing.

Use Value: Eliminates need for discrete FET translators or direction-control logic; maintains sub-1.5 ns propagation delay to meet I²C timing margins.

Use Scenario: Connecting 1.8 V infotainment SoC to 5 V CAN transceiver diagnostic port over SMBus.

IC Role / Device Role / Timing Role: Voltage-level translator enabling communication between mixed-supply subsystems with EN-controlled bus isolation during sleep mode.

Use Value: 5 V-tolerant SDA2/SCL2 pins interface directly to legacy automotive peripherals; EN pin synchronizes with system power-down sequence.

Server Power Sequencing Controller

Medical Patient Monitor

Use Scenario: Linking 0.9 V FPGA configuration I²C bus to 3.3 V PMBus-compliant DC-DC controllers in a rack-mounted PSU.

IC Role / Device Role / Timing Role: Dual-channel translator supporting independent voltage domains with precise VOL control to ensure PMBus command reliability.

Use Value: Low 3.5 Ω R_ON guarantees VOL ≤ 0.3 V at 15 mA-meets PMBus v1.3 VOL specification for robust command acknowledgment.

Use Scenario: Bridging 1.5 V wearable biosensor ASIC to 2.5 V display driver IC in a portable ECG unit.

IC Role / Device Role / Timing Role: Isolated I²C bridge enabling safe, low-noise communication between ultra-low-power analog front-end and digital display subsystem.

Use Value: 4 kV HBM ESD protection on all pins prevents latch-up in clinical environments; EN pin allows dynamic bus disable during battery-swapping.

Equivalent & Alternatives

The following parts are listed as comparable options for similar I²C voltage-level translation applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TCA9617A	Active push-pull output; requires external direction control for unidirectional modes; higher quiescent current (25 µA vs. 5 µA)	Designed for buffered I²C repeater applications with longer trace lengths; not suitable for simple point-to-point translation	Select when bus capacitance exceeds 400 pF or when driving >20 cm traces; avoid if EN-controlled isolation is required
PCA9306	Passive FET-based like PI6ULS5V9306 but lacks EN pin; fixed bidirectional operation; higher R_ON (7 Ω typ)	Used in always-on I²C bridges where continuous translation is acceptable; no bus gating capability	Select only when EN functionality is unnecessary and system-level isolation is handled elsewhere

Compared with TCA9617A and PCA9306, the PI6ULS5V9306 uniquely combines EN-controlled isolation, sub-1.5 ns propagation delay, and 3.5 Ω R_ON in a passive architecture-making it optimal for space-constrained, low-power, and dynamically isolated I²C interconnects.

Availability

PI6ULS5V9306 is available at Aetrix Electronics and suitable for industrial sensor hubs, automotive body control modules, server power sequencing controllers, and medical patient monitors requiring stable component supply across extended temperature and mixed-voltage environments.

Supply support for PI6ULS5V9306 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 semiconductor company specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and connectivity applications.

The PI6ULS5V9306 belongs to Diodes' high-speed I²C translation product line, engineered specifically for reliable, low-latency, and EN-gated interoperability between heterogeneous voltage domains in embedded and industrial systems.

FAQ

What is the minimum VREF1 voltage supported by the PI6ULS5V9306?

The absolute minimum VREF1 is 0.9 V per datasheet specifications, but operation below 1.2 V requires careful validation of VOL compliance on the low-voltage side. At VREF1 = 0.9 V, external devices must tolerate up to 0.15 V VOL (at 3 mA pass current) to avoid false logic LOW interpretation-system designers should verify VIL/VOL margins using the provided VOL requirement table.

Can the PI6ULS5V9306 translate between 1.8 V and 5 V I²C buses at 400 kHz?

Yes-the device supports 1.8 V (VREF1) to 5 V (VREF2) translation with ≤1.4 ns propagation delay in both directions, fully compliant with I²C fast-mode timing. Achieving 400 kHz requires proper pullup resistor sizing (e.g., ≤1.53 kΩ on 5 V side at 10 mA sink) and total bus capacitance ≤400 pF; layout best practices (short traces, minimized stubs) are essential to maintain rise/fall times.

How does the EN pin interface with VREF2, and what happens if it's left floating?

The EN pin must be actively driven to VREF2 (not VREF1) and pulled up through a high-value resistor (typically 200 kΩ) to VREF2. Leaving EN floating risks undefined switching behavior and potential bus contention; the datasheet explicitly prohibits floating EN. When EN = LOW, all four I/O pins enter high-impedance state-no current flows, and no voltage is passed between sides.

Is the PI6ULS5V9306 suitable for automotive applications?

The standard PI6ULS5V9306 is not AEC-Q100 qualified; however, Diodes offers automotive-grade variants (e.g., PI6ULS5V9306Q) with PPAP documentation, IATF 16949 manufacturing, and extended temperature screening. For non-automotive designs, the device meets industrial requirements (-40°C to +85°C) and includes 4 kV HBM ESD protection-sufficient for most non-safety-critical vehicular subsystems.

PI6ULS5V9306UEX Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: ULS

Package/Case:

Packaging:: Tape & Reel (TR)

Product Status:: Active

Translator Type:: Voltage Level

Channel Type:: Bidirectional

Number of Circuits:: 1

Channels per Circuit:: 2

Voltage - VCCA:: 1 V ~ 3.3 V

Voltage - VCCB:: 1.8 V ~ 5.5 V

Input Signal:: -

Output Signal:: -

Output Type:: Open Drain

Data Rate:: -

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

Grade:: -

Qualification:: -

Features:: Auto-Direction Sensing

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC (0.154", 3.90mm Width)

PI6ULS5V9306UEX FAQ

1.How can I place an order for PI6ULS5V9306UEX through Aetrix?

Please submit a Request for Quotation (RFQ) for PI6ULS5V9306UEX 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 PI6ULS5V9306UEX reliable?

The price and inventory of PI6ULS5V9306UEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI6ULS5V9306UEX is usually 5 days.

3.What payment methods are accepted for PI6ULS5V9306UEX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI6ULS5V9306UEX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PI6ULS5V9306UEX?

PI6ULS5V9306UEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PI6ULS5V9306UEX 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 PI6ULS5V9306UEX?

For technical support, including PI6ULS5V9306UEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI6ULS5V9306UEX requirements.

6.How does Aetrix verify that PI6ULS5V9306UEX is sourced from the original manufacturer or authorized distributors?

All PI6ULS5V9306UEX 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 PI6ULS5V9306UEX meets industry standards.

7.What is the process for return or replacement of PI6ULS5V9306UEX?

All PI6ULS5V9306UEX units undergo pre-shipment inspection (PSI). If there is an issue with PI6ULS5V9306UEX, 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 PI6ULS5V9306UEX part is unused and in its original packaging.

Return procedure for PI6ULS5V9306UEX:

1.Submit a request within 90 days.

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

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