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Diodes Incorporated PI6ULS5V9306ZEEX
- Part No.:
- PI6ULS5V9306ZEEX
- Manufacturer:
- Diodes Incorporated
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
PI6ULS5V9306ZEEX.pdf
- Description:
- IC TRANSLTR BIDIRECTIONAL 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,045
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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) supply domains. It enables seamless level translation between mixed-voltage I²C subsystems-e.g., 1.2 V microcontroller to 3.3 V sensor-without direction pins, with ≤1.5 ns propagation delay and 3.5 Ω ON-state resistance.
For engineers reviewing the PI6ULS5V9306 datasheet, PI6ULS5V9306 pinout, PI6ULS5V9306 application, or PI6ULS5V9306 equivalent, key selection criteria include bidirectional open-drain compatibility, EN-controlled isolation, VREF1/VREF2 voltage pairing flexibility, and ESD robustness (4 kV HBM) in compact 8-pin TDFN2x3 (ZE) packaging.
Technical Context
The PI6ULS5V9306 implements passive FET-based clamping architecture for true bidirectional translation: when SDA1 or SCL1 is pulled low, the internal switch conducts, pulling the corresponding SDA2/SCL2 low; when high, voltage at the low-side port is clamped to VREF1 while the high-side port rises to VREF2 via external pullups. No direction pin or clock synchronization is required.
EN input controls conduction state: HIGH enables translation (SCL1↔SCL2, SDA1↔SDA2), LOW forces all I/O pins into high-impedance isolation-preventing bus contention during power sequencing or fault conditions. The device supports standard-mode (100 kHz), fast-mode (400 kHz), and fast-mode plus (1 MHz) I²C timing across all supported VREF combinations.
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; determines minimum system logic threshold and VOL compliance. |
| VREF2 Range | 1.8 V to 5 V: sets high-voltage domain reference for SCL2/SDA2; enables interoperability with legacy 3.3 V/5 V peripherals. |
| Max Propagation Delay | <1.5 ns: ensures timing budget margin for fast-mode I²C (400 kHz) with multiple masters and distributed capacitance. |
| ON-State Resistance | 3.5 Ω typical: minimizes voltage drop and signal distortion during active translation, critical for low-VOL integrity. |
| ESD Rating | 4 kV HBM: protects downstream 1.2 V/1.5 V logic from handling-induced transients without external TVS diodes. |
| Operating Temperature | −40 °C to +85 °C: validated for industrial and automotive cabin-temperature embedded systems. |
| I/O Configuration | Open-drain SCL1/SDA1/SCL2/SDA2: matches native I²C bus topology; requires external pullup resistors on both sides. |
Pinout & Package
PI6ULS5V9306 is packaged in an 8-pin TDFN2x3 (ZE) footprint-2.0 mm × 3.0 mm, 0.5 mm pitch, exposed thermal pad-optimized for space-constrained PCB layouts and thermal dissipation in dense I²C routing paths.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | Common return path for both VREF domains; must be low-inductance connection to minimize noise coupling. |
| 2 VREF1 | Low-voltage supply reference | Sets logic thresholds and clamp voltage for SCL1/SDA1; powers internal bias circuitry for low-side translation. |
| 3 SCL1 | Low-voltage I²C clock | Open-drain bidirectional clock line referenced to VREF1; requires external pullup to VREF1. |
| 4 SDA1 | Low-voltage I²C data | Open-drain bidirectional data line referenced to VREF1; shares same pullup as SCL1. |
| 5 SDA2 | High-voltage I²C data | Open-drain bidirectional data line referenced to VREF2; requires separate pullup to VREF2. |
| 6 SCL2 | High-voltage I²C clock | Open-drain bidirectional clock line referenced to VREF2; shares same pullup as SDA2. |
| 7 VREF2 | High-voltage supply reference | Sets logic thresholds and clamp voltage for SCL2/SDA2; powers high-side bias network. |
| 8 EN | Enable control input | Active-HIGH logic control; ties to VREF2 for automatic enable; drives high-impedance isolation when LOW. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional translation without direction pin | Eliminates GPIO overhead and firmware complexity in mixed-voltage I²C systems-no state management or timing-sensitive direction toggling required. |
| Flow-through pinout (SCL1–SCL2, SDA1–SDA2 aligned) | Reduces PCB trace length and crosstalk risk by enabling straight-through routing between adjacent ports on same board layer. |
| Lock-up free isolation at EN = LOW | Guarantees complete electrical disconnect between domains-prevents back-powering, leakage current, or bus contention during sleep or reset states. |
| 5 V-tolerant I/O ports | Allows direct interface to 5 V peripherals without external level-shifting components, simplifying BOM and layout for legacy system upgrades. |
| 11 pF EN input capacitance | Minimizes loading on enable control lines-enables reliable operation even with long traces or weak drivers driving EN. |
Applications
| Industrial Sensor Hub | Automotive Body Control Module |
|---|---|
Use Scenario: Interfacing 1.2 V ARM Cortex-M0+ MCU with 3.3 V temperature/humidity sensors and 5 V EEPROM over shared I²C bus. IC Role / Device Role / Timing Role: Voltage translator enabling bidirectional data exchange while maintaining I²C timing compliance across three voltage domains. Use Value: Eliminates need for discrete MOSFET translators or dual-supply buffers-reducing component count, board area, and signal integrity risk. | Use Scenario: Connecting 1.8 V infotainment SoC to 5 V lighting controller and 2.5 V door-lock actuator via isolated I²C segments. IC Role / Device Role / Timing Role: EN-controlled bus isolator allowing selective activation of subsystems during wake/sleep transitions without bus lockup. Use Value: Prevents cross-domain leakage and ensures deterministic power-down sequencing-critical for ASIL-B functional safety compliance. |
| Server Baseboard Management | Medical Patient Monitor |
Use Scenario: Bridging 3.3 V BMC processor to 1.5 V DDR memory SPD EEPROM and 5 V fan controller on same I²C bus. IC Role / Device Role / Timing Role: High-speed level shifter supporting fast-mode plus (1 MHz) for rapid SPD readout during boot diagnostics. Use Value: Achieves sub-microsecond propagation delay-preserving timing margins under high-capacitance server backplane loads. | Use Scenario: Isolating 1.0 V wearable sensor ASIC from 3.3 V display driver and 5 V USB-to-I²C bridge in portable diagnostic device. IC Role / Device Role / Timing Role: Low-VREF1 capable translator (down to 0.9 V) enabling ultra-low-power sensor subsystems. Use Value: Maintains VOL < 0.15 V at 0.9 V VREF1-ensuring reliable logic-low detection by sensitive analog front-end ICs. |
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 |
|---|---|---|---|
| TXS0102DCUR | 2-channel auto-directional translator; no EN pin; fixed 1.65 V–5.5 V VCCA/VCCB range; higher Ron (≈8 Ω). | Lacks hardware enable-requires software-controlled bus arbitration; less flexible for power-gated subsystems. | Prefer when EN control is unnecessary and cost sensitivity outweighs isolation needs. |
| PCA9306DCUR | 2-channel bidirectional translator; no EN pin; supports 1.2 V–3.3 V and 1.8 V–5.5 V; 6 Ω Ron; no 0.9 V VREF1 support. | Cannot translate below 1.2 V-unsuitable for sub-1.2 V ultra-low-power MCUs or sensors. | Choose for legacy 1.8 V/3.3 V systems where 0.9 V operation is not required. |
Compared with TXS0102DCUR and PCA9306DCUR, the PI6ULS5V9306 uniquely delivers EN-controlled isolation, 0.9 V VREF1 support, and 3.5 Ω Ron-making it optimal for power-aware, multi-voltage I²C systems requiring deterministic bus segmentation and minimal signal degradation.
Availability
PI6ULS5V9306 is available at Aetrix Electronics and suitable for industrial sensor hubs, automotive body control modules, server baseboard management, and medical patient monitors requiring stable component supply across extended temperature ranges and mixed-voltage I²C interfaces.
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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, energy-efficient solutions for industrial, computing, and automotive markets.
The PI6ULS5V9306 belongs to Diodes' ULTRA LOW VOLTAGE TRANSLATOR product line-designed specifically for robust, low-latency I²C/SMBus bridging in battery-powered and thermally constrained embedded systems.
FAQ
What is the minimum VREF1 voltage supported by PI6ULS5V9306?
The PI6ULS5V9306 supports VREF1 down to 0.9 V per datasheet DS41008 Rev 5-2. Operation below this voltage is not characterized and may result in unreliable VOL or translation failure. For 0.9 V use, external VREF2-side devices must meet strict VOL requirements (≤0.15 V at 3 mA pass current) to ensure logic-low recognition.
Can PI6ULS5V9306 translate between 1.5 V and 5 V I²C buses?
Yes-PI6ULS5V9306 explicitly supports 1.5 V VREF1 with 5 V VREF2 per its voltage pairing table. This configuration enables translation from 1.5 V microcontrollers to legacy 5 V peripherals while maintaining fast-mode timing (≤1.5 ns delay) and 3.5 Ω Ron for low signal distortion.
Is external pullup resistance required on both sides of the translator?
Yes-both SCL1/SDA1 and SCL2/SDA2 require external pullup resistors to their respective VREF supplies. Pullup values depend on bus capacitance, sink current, and target frequency; recommended minima range from 172 Ω (15 mA drive) to 2.96 kΩ (3 mA drive) based on VREF combinations per DS41008 Tables 1–3.
Does PI6ULS5V9306 support Fast-Mode Plus (1 MHz) I²C operation?
Yes-the device is specified for Fast-Mode Plus operation with ≤1.5 ns propagation delay and supports up to 1 MHz clock rates when used with appropriate pullup resistors and controlled node capacitance (<50 pF). System-level validation is required due to dependency on external RC time constants.
PI6ULS5V9306ZEEX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- ULS
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-WFDFN Exposed Pad
PI6ULS5V9306ZEEX FAQ
1.How can I place an order for PI6ULS5V9306ZEEX through Aetrix?
Please submit a Request for Quotation (RFQ) for PI6ULS5V9306ZEEX 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 PI6ULS5V9306ZEEX reliable?
The price and inventory of PI6ULS5V9306ZEEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI6ULS5V9306ZEEX is usually 5 days.
3.What payment methods are accepted for PI6ULS5V9306ZEEX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI6ULS5V9306ZEEX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI6ULS5V9306ZEEX?
PI6ULS5V9306ZEEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI6ULS5V9306ZEEX 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 PI6ULS5V9306ZEEX?
For technical support, including PI6ULS5V9306ZEEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI6ULS5V9306ZEEX requirements.
6.How does Aetrix verify that PI6ULS5V9306ZEEX is sourced from the original manufacturer or authorized distributors?
All PI6ULS5V9306ZEEX 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 PI6ULS5V9306ZEEX meets industry standards.
7.What is the process for return or replacement of PI6ULS5V9306ZEEX?
All PI6ULS5V9306ZEEX units undergo pre-shipment inspection (PSI). If there is an issue with PI6ULS5V9306ZEEX, 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 PI6ULS5V9306ZEEX part is unused and in its original packaging.
Return procedure for PI6ULS5V9306ZEEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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