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Diodes Incorporated PI6ULS5V9306WE
- Part No.:
- PI6ULS5V9306WE
- Manufacturer:
- Diodes Incorporated
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
PI6ULS5V9306WE.pdf
- Description:
- IC TRANSLTR BIDIRECTIONAL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,646
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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, 3.5 Ω typical ON-state resistance, <1.5 ns max propagation delay, and open-drain I/O for mixed-voltage microcontroller-to-sensor interfacing in industrial IoT edge nodes.
For engineers reviewing the PI6ULS5V9306 datasheet, PI6ULS5V9306 pinout, PI6ULS5V9306 application, or PI6ULS5V9306 equivalent, this device enables seamless level translation between 1.0 V and 5 V without direction pins, supports Standard/Fast/Fast-Plus I²C modes, and provides high-impedance isolation when EN = LOW - critical for bus arbitration and multi-master systems.
Technical Context
The PI6ULS5V9306 implements a passive clamping architecture using MOSFET-based bidirectional switches per channel (SCL/SDA), eliminating need for direction control logic. Its operation relies on internal reference biasing and voltage-dependent clamp activation to enforce level translation across asymmetric supply domains.
Each channel maintains matched electrical characteristics: identical ON-resistance (3.5–140 Ω depending on EN voltage), symmetric propagation delay (<1.4 ns), and 5 V-tolerant I/O pins. The EN input directly controls conduction state of both SCL and SDA paths simultaneously, enabling synchronized bus isolation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VREF1 Range | 0.9 V to 3.3 V - sets low-side logic threshold and pullup compatibility for 1.0 V–3.3 V I²C devices |
| VREF2 Range | 1.8 V to 5 V - defines high-side domain for interfacing with 2.5 V, 3.3 V, or 5 V controllers/sensors |
| Max Propagation Delay | <1.5 ns - ensures timing compliance with Fast-Mode Plus (1 MHz) I²C and multi-master arbitration |
| ON-State Resistance | 3.5 Ω typ. at VI(EN) = 4.5 V - minimizes voltage drop and signal distortion during active translation |
| ESD Protection | 4 kV HBM - protects downstream 1.0 V/1.2 V logic from ESD events on 5 V bus side |
| Operating Temperature | −40 °C to +85 °C - qualified for industrial ambient conditions without derating |
| I/O Configuration | Open-drain SCL1/SDA1/SCL2/SDA2 - compatible with standard I²C pullup topologies and SMBus protocols |
Pinout & Package
PI6ULS5V9306 is available in multiple 8-pin packages including MSOP (M), VSSOP (V), SSOP (SS), SOT28 (TA), and X2-DFN (HK); all share identical pin mapping and functional layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | Common return path for both voltage domains; must be low-impedance connection to system ground plane |
| 2 VREF1 | Low-voltage domain supply | Bias reference for SCL1/SDA1; determines logic HIGH threshold and pullup resistor selection on low side |
| 3 SCL1 | Low-side serial clock | Open-drain I²C clock line referenced to VREF1; requires external pullup to VREF1 |
| 4 SDA1 | Low-side serial data | Open-drain I²C data line referenced to VREF1; shares same pullup as SCL1 |
| 5 SDA2 | High-side serial data | Open-drain I²C data line referenced to VREF2; requires external pullup to VREF2 |
| 6 SCL2 | High-side serial clock | Open-drain I²C clock line referenced to VREF2; shares same pullup as SDA2 |
| 7 VREF2 | High-voltage domain supply | Bias reference for SCL2/SDA2; sets logic HIGH level and enables 5 V tolerance on high-side I/O |
| 8 EN | Enable control input | Active-HIGH switch control; must be pulled to VREF2 via ≥200 kΩ resistor to activate bidirectional path |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional translation without direction pin | Eliminates GPIO overhead and timing-critical control signals in resource-constrained MCU designs |
| Flow-through pinout | Enables straight PCB trace routing between SCL1↔SCL2 and SDA1↔SDA2, minimizing stub length and signal integrity degradation |
| Lock-up free isolation at EN = LOW | Guarantees complete electrical disconnect between domains - prevents leakage current and bus contention during sleep or fault states |
| 5 V-tolerant I/O ports | Allows direct interface with legacy 5 V peripherals while protecting sub-1.2 V logic from overvoltage stress |
| 11 pF EN input capacitance | Minimizes loading on enable control net, supporting clean digital switching even with long traces or weak drivers |
Applications
| Industrial Sensor Hub | Automotive Body Control Module |
|---|---|
|
Use Scenario: Interfacing 1.2 V MEMS accelerometers and 3.3 V microcontrollers in programmable logic controllers. IC Role / Device Role / Timing Role: Voltage-level translator enabling bidirectional I²C communication between mismatched supply domains while preserving Fast-Mode timing margins. Use Value: Eliminates discrete FET solutions requiring direction logic, reducing BOM count and PCB area by 40% versus discrete alternatives. |
Use Scenario: Connecting 5 V CAN transceiver status registers and 1.8 V automotive SoC I²C master in body electronics gateway. IC Role / Device Role / Timing Role: Isolates 5 V SMBus slave devices from low-voltage host during power sequencing and enables EN-controlled bus partitioning. Use Value: Provides guaranteed 4 kV HBM ESD protection on 5 V side, preventing latch-up in safety-critical vehicle subsystems. |
| Medical Wearable Data Logger | Smart Home Hub Controller |
|
Use Scenario: Bridging ultra-low-power 0.9 V biosensor ASICs and 2.5 V application processor in battery-operated health monitors. IC Role / Device Role / Timing Role: Maintains sub-1 ns propagation delay to support 400 kHz I²C polling without compromising real-time sampling deadlines. Use Value: Enables use of 0.9 V logic to extend battery life >30% versus 1.2 V alternatives, while retaining full protocol compatibility. |
Use Scenario: Integrating 3.3 V environmental sensors (temperature/humidity) and 5 V Zigbee radio modules into unified home automation controller. IC Role / Device Role / Timing Role: Translates I²C signals between sensor hub and radio subsystem, with EN used to disable radio bus during firmware updates. Use Value: Prevents unintended radio wake-up during sensor read cycles via hardware-enforced bus isolation, reducing standby current by 12 µA. |
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 | Integrated auto-direction sensing; no EN pin; fixed 1.8 V/3.3 V or 2.5 V/5 V configurations | Lacks hardware-enable isolation; unsuitable where dynamic bus partitioning is required | Select when automatic direction detection is preferred and EN-controlled shutdown is unnecessary |
| PCA9306 | Lower VREF1 min (0.8 V); higher max propagation delay (2.5 ns); no EN pin; 3.5 V max VREF2 | Cannot support 5 V high-side domains; lacks hardware isolation capability | Choose only for cost-sensitive 1.0 V–3.3 V translation where 5 V tolerance and EN control are not needed |
Compared with TCA9617A and PCA9306, the PI6ULS5V9306 uniquely combines 5 V-tolerant I/O, hardware EN control for deterministic bus isolation, and support for 0.9 V low-voltage domains - making it the only option suitable for industrial edge nodes requiring both wide voltage range and fail-safe bus management.
Availability
PI6ULS5V9306 is available at Aetrix Electronics and suitable for industrial sensor hubs, automotive body control modules, medical wearable data loggers, and smart home hub controllers requiring stable component supply across extended temperature ranges and mixed-voltage architectures.
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 ICs for power management, signal integrity, and connectivity applications.
The PI6ULS5V9306 belongs to Diodes' high-speed interface translation product line, engineered specifically for robust, low-latency I²C/SMBus interoperability across heterogeneous voltage domains in industrial and automotive systems.
FAQ
What is the minimum VREF1 voltage supported by PI6ULS5V9306?
The absolute minimum VREF1 is 0.9 V per datasheet specifications. Operation below this voltage risks failure to meet VOL and VIH thresholds on the low side, especially under load. For reliable 0.9 V operation, external device VOL must be ≤0.15 V at 3 mA sink current, and system designers must verify VIL margin against translated levels per Figure 6 in DS41008 Rev 5-2.
Can PI6ULS5V9306 translate between 1.5 V and 5 V I²C buses?
Yes - the device explicitly supports 1.5 V VREF1 with 5 V VREF2 per its feature list and dynamic characterization tables. At this combination, typical ON-resistance is 6 Ω (VI(EN) = 4.5 V), propagation delay remains <1.4 ns, and 5 V tolerance on SCL2/SDA2 ensures safe interface with 5 V peripherals without level-shifting circuitry.
How should the EN pin be connected for reliable operation?
EN must be pulled to VREF2 through a ≥200 kΩ resistor, as specified in the Application Information section. This ensures proper biasing across temperature and supply variations. A 0.01 µF or 0.1 µF decoupling capacitor on VREF2 is recommended to suppress noise-induced false enable/disable transitions during high-frequency I²C activity.
Does PI6ULS5V9306 support Fast-Mode Plus (1 MHz) I²C operation?
Yes - the device guarantees <1.5 ns maximum propagation delay and supports rise/fall times compatible with 1 MHz clock rates when node capacitance is ≤50 pF and pullup resistors are sized per the datasheet's 10–15 mA drive strength tables. System-level validation is required due to dependency on PCB layout and external components.
PI6ULS5V9306WE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- ULS
- Package/Case:
- Packaging:
- Tube
- 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-SOIC (0.154", 3.90mm Width)
PI6ULS5V9306WE FAQ
1.How can I place an order for PI6ULS5V9306WE through Aetrix?
Please submit a Request for Quotation (RFQ) for PI6ULS5V9306WE 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 PI6ULS5V9306WE reliable?
The price and inventory of PI6ULS5V9306WE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI6ULS5V9306WE is usually 5 days.
3.What payment methods are accepted for PI6ULS5V9306WE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI6ULS5V9306WE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI6ULS5V9306WE?
PI6ULS5V9306WE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI6ULS5V9306WE 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 PI6ULS5V9306WE?
For technical support, including PI6ULS5V9306WE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI6ULS5V9306WE requirements.
6.How does Aetrix verify that PI6ULS5V9306WE is sourced from the original manufacturer or authorized distributors?
All PI6ULS5V9306WE 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 PI6ULS5V9306WE meets industry standards.
7.What is the process for return or replacement of PI6ULS5V9306WE?
All PI6ULS5V9306WE units undergo pre-shipment inspection (PSI). If there is an issue with PI6ULS5V9306WE, 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 PI6ULS5V9306WE part is unused and in its original packaging.
Return procedure for PI6ULS5V9306WE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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