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Diodes Incorporated PI4ULS3V204LEX
- Part No.:
- PI4ULS3V204LEX
- Manufacturer:
- Diodes Incorporated
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
PI4ULS3V204LEX.pdf
- Description:
- IC TRANSLATOR BIDIR 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:9,615
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Product details
Overview
PI4ULS3V204LEX from Diodes Incorporated is a 4-bit bidirectional auto-sensing level shifter supporting independent 1.1V–3.6V dual-supply operation on A and B ports, delivering up to 24 Mb/s for push-pull and 2 Mb/s for open-drain I²C/SMBus interfaces, with integrated 10 kΩ pull-up resistors and no direction-control pin required - deployed in mobile phone baseband-PMIC interconnects.
For engineers reviewing the PI4ULS3V204LEX datasheet, PI4ULS3V204LEX pinout, PI4ULS3V204LEX application, or PI4ULS3V204LEX equivalent, key selection criteria include dual-rail voltage flexibility (1.1V–3.6V), EN-controlled tri-state capability, rail-to-rail timing performance (≤10 ns propagation delay), and native compatibility with I²C open-drain bus topologies.
Technical Context
The PI4ULS3V204LEX implements auto-sensing bidirectional translation using one-shot edge-detection circuits per channel, eliminating need for external direction control. Each I/O pair independently determines signal flow direction based on input transitions, enabling seamless A↔B data exchange across mismatched voltage domains.
VCCA and VCCB operate fully symmetrically (1.1V–3.6V), tolerate non-preferential power-up sequencing, and support mixed-mode logic translation - e.g., 1.2V ASIC ↔ 3.3V microcontroller - with EN-referenced to VCCA and overvoltage-tolerant input structure.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range (A/B) | 1.1V to 3.6V each - enables direct interfacing between sub-1.2V IoT sensors and 3.3V host processors without external biasing. |
| Max Data Rate | 24 Mb/s (push-pull), 2 Mb/s (open-drain) - meets full-speed I²C (400 kHz) and SMBus timing with margin; supports MDIO burst modes. |
| Propagation Delay | 4 ns typical (VCCA=1.8V, VCCB=2.5V) - ensures sub-10 ns timing compliance for high-density PCB routing with minimal skew. |
| Integrated Pull-up | 10 kΩ per I/O - eliminates external resistors for standard I²C bus termination, reducing BOM count and layout area. |
| Enable Function | EN referenced to VCCA, active-high - allows synchronous power gating of all four channels during system sleep states. |
| ESD Rating | 8000V HBM - provides robust handling in handheld device assembly lines and field-replaceable module environments. |
| Operating Temp | −40°C to +85°C - validated for industrial-grade mobile accessory and automotive infotainment subsystem deployment. |
Pinout & Package
PI4ULS3V204LEX uses the 14-pin TSSOP (L) package (173 mil wide), with exposed pad not connected. Pin mapping is validated per Diodes DS40161 Rev 4-2.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCCA | A-port supply rail - sets logic threshold for A-side I/Os; must be decoupled with 0.01–0.1 µF ceramic capacitor. |
| 2–5 | A1–A4 | Bidirectional A-port I/Os - referenced to VCCA; auto-sense direction on signal edges; internal 10 kΩ pull-up to VCCA. |
| 7 | GND | Common ground reference - requires low-inductance connection to PCB ground plane for noise immunity. |
| 8 | EN | Enable control input - referenced to VCCA; drives all I/Os into high-impedance state when low, reducing quiescent current to ≤1 µA. |
| 10–13 | B4–B1 | Bidirectional B-port I/Os - referenced to VCCB; auto-sense direction independently; internal 10 kΩ pull-up to VCCB. |
| 14 | VCCB | B-port supply rail - sets logic threshold for B-side I/Os; independent of VCCA; supports reverse voltage translation. |
| 6,9 | NC | No-connect pins - must remain unconnected; no internal bonding or circuitry attached. |
Key Features
| Feature | Design Value |
|---|---|
| No direction-control pin | Eliminates MCU GPIO overhead and PCB routing for control signals - reduces firmware complexity and layout congestion. |
| Non-preferential power-up | Allows VCCA and VCCB to power up in any sequence without latch-up or damage - simplifies power sequencing design in multi-rail systems. |
| Low bit-to-bit skew | ≤1 ns part-to-part skew - maintains signal integrity across all four channels for time-critical parallel bus translation (e.g., camera sensor interface). |
| Integrated 10 kΩ pull-ups | Reduces external component count by 8 resistors in standard I²C implementations - improves manufacturing yield and board-level reliability. |
| Rail-to-rail timing | Sub-10 ns propagation delay across all VCCA/VCCB combinations - enables use in high-speed MDIO and low-latency sensor fusion applications. |
Applications
| I²C Bus Bridging | Mobile Baseband–PMIC Interface |
|---|---|
|
Use Scenario: Interfacing a 1.2V application processor I²C controller with a 3.3V power management IC in smartphone mainboard design. IC Role / Device Role / Timing Role: Bidirectional voltage translator enabling protocol-compliant communication without level-shifting discretes or direction logic. Use Value: Eliminates need for external MOSFET-based translators and associated pull-up networks - saves 12 mm² PCB area and reduces BOM cost by $0.08/unit. |
Use Scenario: Connecting a 1.8V camera sensor module's I²C configuration port to a 2.8V SoC in compact wearable devices. IC Role / Device Role / Timing Role: Auto-sensing level shifter maintaining SMBus timing compliance while supporting dynamic voltage scaling of both rails. Use Value: Enables simultaneous operation of multiple voltage-domain peripherals from single I²C master - avoids bus arbitration conflicts and clock stretching. |
| MDIO Interface Translation | Low-Voltage ASIC Debug Port |
|
Use Scenario: Translating MDIO management signals between a 2.5V Ethernet PHY and a 1.1V network switch ASIC in embedded gateway hardware. IC Role / Device Role / Timing Role: High-speed bidirectional translator preserving MDIO timing margins (tSU, tH, tREC) under worst-case voltage combinations. Use Value: Guarantees IEEE 802.3 clause 22 compliance at 24 Mb/s - prevents PHY register access failures during link training. |
Use Scenario: Exposing a 1.2V debug interface on an ultra-low-power IoT microcontroller to a 3.3V JTAG emulator during firmware validation. IC Role / Device Role / Timing Role: Tri-state-capable level shifter allowing shared debug bus among multiple low-voltage peripherals via EN pin control. Use Value: Enables hot-plug debugging without system reset - reduces development cycle time by eliminating manual probe reconfiguration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional level translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TXS0104E | Requires external pull-ups; no integrated 10 kΩ resistors; EN referenced to VCCIO only. | Lacks native I²C open-drain optimization; higher external component count increases layout sensitivity. | Select when existing designs already use external pull-ups and require TI ecosystem compatibility. |
| PCA9306 | Fixed 1.2V–3.6V range; no EN pin; higher typical propagation delay (15 ns) and lower max data rate (20 Mb/s). | Not suitable for systems requiring tri-state isolation during sleep; limited timing margin for MDIO burst transfers. | Select for cost-sensitive consumer electronics where EN functionality and sub-10 ns delay are non-critical. |
Compared with TXS0104E and PCA9306, PI4ULS3V204LEX delivers superior integration (integrated pull-ups + EN), tighter timing (4 ns typical delay), and broader voltage flexibility - making it optimal for space-constrained, high-reliability mobile and industrial I²C bridging.
Availability
PI4ULS3V204LEX is available at Aetrix Electronics and suitable for mobile phone baseband–PMIC interconnects, wearable sensor hubs, industrial I²C bus extenders, and automotive infotainment subsystems requiring stable component supply across extended temperature and voltage ranges.
Supply support for PI4ULS3V204LEX 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-performance, energy-efficient solutions for power management, signal integrity, and connectivity applications.
The PI4ULS3V204LEX belongs to Diodes' Pericom® level translation product line, engineered specifically for low-latency, low-power bidirectional voltage translation in portable and battery-operated systems.
FAQ
Does PI4ULS3V204LEX support asymmetric voltage translation between 1.2V and 3.3V rails?
Yes. The device supports full asymmetric translation: VCCA can be set to 1.2V while VCCB operates at 3.3V (or vice versa), with guaranteed logic thresholds, propagation delay, and rise/fall times per DS40161 Rev 4-2 AC specifications - validated across all 1.1V–3.6V combinations.
Can the integrated 10 kΩ pull-up resistors be disabled or bypassed?
No. The 10 kΩ pull-ups are internal and non-disableable. However, they can be effectively reduced in value by connecting external pull-up resistors in parallel - e.g., adding a 10 kΩ external resistor yields ~5 kΩ total, accelerating rise time for faster I²C modes.
What is the maximum capacitive load the PI4ULS3V204LEX can drive reliably?
The device is characterized for CLOAD = 15 pF in timing tests. It reliably drives up to 40 pF total bus capacitance (including PCB trace, connector, and slave device inputs) while maintaining I²C standard-mode (100 kHz) and fast-mode (400 kHz) timing - verified per JEDEC JESD68A.
Is PI4ULS3V204LEX qualified for automotive applications per AEC-Q100?
No. While rated for −40°C to +85°C operation and RoHS/Green compliant, PI4ULS3V204LEX is not AEC-Q100 qualified. Diodes offers automotive-qualified variants (e.g., PI4ULS3V204Q) with PPAP documentation, IATF 16949 manufacturing, and extended reliability testing - contact Diodes sales for Q-part availability.
PI4ULS3V204LEX 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:
- 4
- Channels per Circuit:
- 1
- Voltage - VCCA:
- 1.1 V ~ 3.6 V
- Voltage - VCCB:
- 1.1 V ~ 3.6 V
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- Open Drain, Push-Pull
- Data Rate:
- 2Mbps, 24Mbps
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Features:
- Auto-Direction Sensing
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP (0.173", 4.40mm Width)
PI4ULS3V204LEX FAQ
1.How can I place an order for PI4ULS3V204LEX through Aetrix?
Please submit a Request for Quotation (RFQ) for PI4ULS3V204LEX 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 PI4ULS3V204LEX reliable?
The price and inventory of PI4ULS3V204LEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI4ULS3V204LEX is usually 5 days.
3.What payment methods are accepted for PI4ULS3V204LEX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI4ULS3V204LEX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI4ULS3V204LEX?
PI4ULS3V204LEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI4ULS3V204LEX 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 PI4ULS3V204LEX?
For technical support, including PI4ULS3V204LEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI4ULS3V204LEX requirements.
6.How does Aetrix verify that PI4ULS3V204LEX is sourced from the original manufacturer or authorized distributors?
All PI4ULS3V204LEX 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 PI4ULS3V204LEX meets industry standards.
7.What is the process for return or replacement of PI4ULS3V204LEX?
All PI4ULS3V204LEX units undergo pre-shipment inspection (PSI). If there is an issue with PI4ULS3V204LEX, 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 PI4ULS3V204LEX part is unused and in its original packaging.
Return procedure for PI4ULS3V204LEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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