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Diodes Incorporated PI4ULS5V202UEX
- Part No.:
- PI4ULS5V202UEX
- Manufacturer:
- Diodes Incorporated
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
PI4ULS5V202UEX.pdf
- Description:
- IC TRANSLTR BIDIRECTIONAL 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:24,073
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Product details
Overview
PI4ULS5V202 from Diodes Incorporated is a 2-bit bidirectional auto-sensing level shifter with dual independent supply rails (VCCA and VCCB), integrated 10 kΩ pull-up resistors, 20 Mb/s push-pull data rate, and operation across 1.2 V to 5.5 V on both ports-designed for I²C/SMBus voltage translation in mobile and embedded systems.
For engineers reviewing the PI4ULS5V202 datasheet, PI4ULS5V202 pinout, PI4ULS5V202 application, or PI4ULS5V202 equivalent, key selection criteria include automatic direction sensing, rail-to-rail voltage compatibility, tri-state enable control, and ultra-small UDFN-8 (1.2 × 1.6 mm) or MSOP-8 packaging for space-constrained designs.
Technical Context
The PI4ULS5V202 implements dual-channel, directionless level translation using one-shot edge-detection circuits that autonomously determine signal flow direction without external control logic. Each channel supports independent VCCA and VCCB supplies ranging from 1.2 V to 5.5 V, enabling asymmetric voltage translation (e.g., 1.8 V ↔ 3.3 V or 1.2 V ↔ 5.5 V).
It features an active-high EN pin referenced to VCCA with overvoltage tolerance, enabling full I/O tri-state operation. Internal 10 kΩ pull-ups are connected to their respective supply rails (VCCA for A-side, VCCB for B-side), eliminating external resistors in open-drain I²C applications while maintaining compliance with SMBus timing requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCCA / VCCB Range | 1.2 V to 5.5 V each - enables flexible mixed-voltage system interfacing without level-shifter reconfiguration |
| Max Data Rate (Push-Pull) | 20 Mb/s - supports high-speed digital interfaces like GPIO expansion or SPI-level translation |
| Max Data Rate (Open-Drain) | 2 Mb/s - compliant with standard-mode I²C (100 kHz) and fast-mode (400 kHz) bus timing |
| Propagation Delay | ≤15 ns (typ.) - ensures minimal timing skew between channels for synchronized multi-bit signals |
| Integrated Pull-Up | 10 kΩ per I/O - eliminates external resistors in I²C/SMBus, reducing BOM count and PCB area |
| ESD Rating | 8 kV HBM - provides robust handling during board assembly and field operation |
| Supply Current (Quiescent) | ≤5.0 µA per supply - enables ultra-low-power operation in battery-powered portable devices |
Pinout & Package
Available in two compact packages: 8-pin MSOP (U) and 8-pin UDFN-1.2×1.6 mm (XV), both RoHS-compliant and halogen-free. Pin functions are identical across packages.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VCCA | Power Supply Input | A-port logic reference; powers internal circuitry and sources A-side pull-ups |
| 2 A1 | Bidirectional I/O | Port A channel 1; auto-senses direction and translates logic levels relative to VCCA |
| 3 A2 | Bidirectional I/O | Port A channel 2; electrically isolated from A1 but shares same VCCA reference |
| 4 GND | Ground Reference | Common return path for both supply domains; required for ESD and noise integrity |
| 5 EN | Digital Control Input | Active-high enable; pulls all I/O into high-impedance state when low, reducing system power leakage |
| 6 B2 | Bidirectional I/O | Port B channel 2; referenced to VCCB; supports independent voltage domain translation |
| 7 B1 | Bidirectional I/O | Port B channel 1; matches B2 timing and drive strength; no cross-talk with A-side signals |
| 8 VCCB | Power Supply Input | B-port logic reference; powers B-side circuitry and sources B-side pull-ups |
Key Features
| Feature | Design Value |
|---|---|
| No Direction-Control Pin Required | Automatic edge detection eliminates need for GPIO coordination or timing-critical control signals |
| Non-Preferential Power-Up Sequencing | VCCA and VCCB may power up in any order without latch-up or damage - simplifies power management design |
| Low Bit-to-Bit Skew | ≤5 ns part-to-part skew ensures matched timing across both channels for synchronous data transfer |
| Ultra-Small Footprint | UDFN-8 package measures only 1.2 mm × 1.6 mm - ideal for camera modules and wearable electronics |
| Integrated Pull-Up Resistors | 10 kΩ per I/O line reduces external component count and improves layout repeatability in I²C designs |
Applications
| I²C Bus Translation | SMBus Interface Bridging |
|---|---|
Use Scenario: Interfacing a 1.8 V microcontroller I²C master with a 3.3 V sensor slave in a smartphone camera module. IC Role / Device Role / Timing Role: Bidirectional voltage translator enabling clock/data signal translation without direction control or external pull-ups. Use Value: Eliminates discrete resistor networks and GPIO overhead, reducing PCB area by >1.5 mm² and firmware complexity. | Use Scenario: Connecting a 5.0 V baseband processor to a 1.2 V PMIC via SMBus in an LTE modem subsystem. IC Role / Device Role / Timing Role: Dual-supply level shifter maintaining SMBus electrical compliance (open-drain, rise-time limits) across voltage domains. Use Value: Ensures <400 ns rise time at 1.2 V side while supporting 100 kHz–400 kHz clock rates without signal degradation. |
| MDIO Interface Level Shifting | Low-Voltage ASIC Signal Bridging |
Use Scenario: Translating MDIO management signals between a 2.5 V Ethernet PHY and a 1.5 V MAC controller in a network switch SoC. IC Role / Device Role / Timing Role: Auto-sensing bidirectional translator preserving MDIO timing margins under varying load conditions. Use Value: Guarantees ≤15 ns propagation delay and <5 ns skew - critical for IEEE 802.3 clause 22 register access timing. | Use Scenario: Isolating 1.2 V FPGA I/O banks from 3.3 V legacy peripherals in industrial programmable logic controllers. IC Role / Device Role / Timing Role: Configurable dual-rail translator enabling safe, glitch-free signal handoff between voltage domains. Use Value: Supports non-monotonic power sequencing and prevents back-powering of low-voltage domains during hot-swap events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional level translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TXS0102DCUR | Requires external pull-ups; no integrated resistors; 1.65–5.5 V range; 60 Mbps max (push-pull) | Better suited for high-speed GPIO translation where external bias control is preferred | Select when higher speed (>20 Mbps) or configurable pull-up values are required |
| PCA9306DCUR | Fixed 10 kΩ pull-ups; no EN pin; 1.2–3.6 V on A-side, 1.8–5.5 V on B-side; 2 Mbps max (open-drain) | Limited to I²C-only use; lacks tri-state control and wider VCCA/VCCB overlap | Select for cost-sensitive I²C-only designs where enable functionality is unnecessary |
Compared with TXS0102DCUR and PCA9306DCUR, the PI4ULS5V202 uniquely combines integrated pull-ups, tri-state enable, full 1.2–5.5 V symmetry on both rails, and guaranteed 20 Mbps push-pull performance - making it optimal for compact, low-power, mixed-voltage embedded systems requiring design flexibility and minimal external components.
Availability
PI4ULS5V202 is available at Aetrix Electronics and suitable for I²C bus translation, SMBus interface bridging, MDIO management signaling, and low-voltage ASIC signal bridging requiring stable component supply across automotive, industrial, and consumer electronics programs.
Supply support for PI4ULS5V202 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 power management, signal integrity, and connectivity applications.
The PI4ULS5V202 belongs to Diodes' Pericom® level translation product line, engineered specifically for low-latency, low-power, and space-constrained voltage domain bridging in portable and embedded systems.
FAQ
What is the function of the EN pin on the PI4ULS5V202?
The EN pin is an active-high enable input referenced to VCCA. When pulled low, it places all I/O pins (A1, A2, B1, B2) into a high-impedance tri-state mode, reducing quiescent current to ≤1 µA per supply rail. This feature supports dynamic power gating in battery-operated devices and prevents bus contention during system sleep states.
Can VCCA and VCCB be powered from different voltage sources simultaneously?
Yes - VCCA and VCCB may be independently set between 1.2 V and 5.5 V, including asymmetric configurations (e.g., 1.2 V ↔ 5.5 V). The device supports non-preferential power-up sequencing, meaning either supply can ramp first without risk of latch-up, shoot-through, or damage, simplifying multi-rail power architecture design.
How does the PI4ULS5V202 handle open-drain versus push-pull signaling?
The PI4ULS5V202 automatically adapts: for open-drain (e.g., I²C), it relies on external or internal pull-ups and achieves ≤2 Mbps data rate with controlled rise/fall times; for push-pull, it delivers ≤20 Mbps with ≤15 ns propagation delay. Its internal architecture detects edge transitions regardless of driver type, eliminating manual configuration.
Are the integrated 10 kΩ pull-up resistors fixed or adjustable?
The 10 kΩ pull-up resistors are fixed and internally connected to their respective supply rails (VCCA for A-side, VCCB for B-side). Their value cannot be trimmed, but external resistors may be placed in parallel to reduce effective resistance - useful for optimizing I²C rise time in high-capacitance bus environments while retaining auto-sensing functionality.
PI4ULS5V202UEX 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:
- 1.2 V ~ 5.5 V
- Voltage - VCCB:
- 1.2 V ~ 5.5 V
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- Tri-State, Non-Inverted
- Data Rate:
- 20Mbps
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Features:
- Auto-Direction Sensing
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
PI4ULS5V202UEX FAQ
1.How can I place an order for PI4ULS5V202UEX through Aetrix?
Please submit a Request for Quotation (RFQ) for PI4ULS5V202UEX 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 PI4ULS5V202UEX reliable?
The price and inventory of PI4ULS5V202UEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI4ULS5V202UEX is usually 5 days.
3.What payment methods are accepted for PI4ULS5V202UEX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI4ULS5V202UEX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI4ULS5V202UEX?
PI4ULS5V202UEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI4ULS5V202UEX 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 PI4ULS5V202UEX?
For technical support, including PI4ULS5V202UEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI4ULS5V202UEX requirements.
6.How does Aetrix verify that PI4ULS5V202UEX is sourced from the original manufacturer or authorized distributors?
All PI4ULS5V202UEX 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 PI4ULS5V202UEX meets industry standards.
7.What is the process for return or replacement of PI4ULS5V202UEX?
All PI4ULS5V202UEX units undergo pre-shipment inspection (PSI). If there is an issue with PI4ULS5V202UEX, 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 PI4ULS5V202UEX part is unused and in its original packaging.
Return procedure for PI4ULS5V202UEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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