Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Diodes Incorporated PI4ULS3V08ZFEX

Name: PI4ULS3V08ZFEX
Brand: Diodes Incorporated
SKU: PI4ULS3V08ZFEX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: PI4ULS3V08ZFEX

Manufacturer:: Diodes Incorporated

Category:: Translators, Level Shifters

Package:

Datasheet:: PI4ULS3V08ZFEX.pdf

Description:: IC TRANSLTR BIDIRECTIONAL 36TQFN

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,854

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

PI4ULS3V08ZFEX from Diodes Incorporated (acquired Pericom Semiconductor) is an 8-bit universal bidirectional voltage-level shifter with automatic direction control, supporting independent 1.2V–3.6V operation on A and B ports. It enables asynchronous data translation between mismatched logic domains (e.g., 1.8V MCU ↔ 3.3V peripheral), delivers ≤7 ns propagation delay at 3.3V, supports 180 Mbps push-pull bus speeds, and features 12 mA drive capability per I/O - used in mobile baseband processor interconnects.

For engineers reviewing the PI4ULS3V08ZFEX datasheet, PI4ULS3V08ZFEX pinout, PI4ULS3V08ZFEX application, or PI4ULS3V08ZFEX equivalent, key selection criteria include dual-rail voltage flexibility, automatic direction sensing without external control, output impedance selection (300 Ω / 2.2 kΩ), test mode enablement, and industrial temperature support (−40°C to +85°C).

Technical Context

The PI4ULS3V08 operates as a dual-octal non-inverting transceiver with fully independent VCCA (1.2V–3.6V) and VCCB (1.2V–3.6V) rails, enabling true universal level shifting across any combination within that range. Direction detection is autonomous - no DIR pin required - and contention resolution tri-states both AX and BX when simultaneous bidirectional activity occurs.

Control logic (xOE, xSEL, TEST_EN, OUT_SEL) is powered by VCCB and supports configurable output loading (10–50 pF), selectable output impedance (low/high), and dedicated test modes for A→B or B→A forced translation. Timing performance scales with supply voltages: tPD improves from 7 ns (VCCA=VCCB=3.3V) to 8 ns (VCCA=1.5V/VCCB=1.2V), with fmax reaching 90 MHz under optimal conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Range	VCCA and VCCB independently configurable from 1.2V to 3.6V - enables mixed-voltage SoC-peripheral interfacing without external regulators.
Propagation Delay	≤7 ns (A↔B, VCCA=VCCB=3.3V) - supports high-speed serial buses like SDIO, eMMC, or low-latency sensor interfaces.
Max Data Rate	180 Mbps (push-pull) - exceeds requirements for UHS-I SD card signaling and MIPI I3C auxiliary channels.
Drive Strength	±12 mA per I/O at VCCO=3.0V - sufficient to drive 50 pF loads over PCB traces up to 10 cm without signal integrity degradation.
ESD Rating	2000V HBM, 200V MM - meets IEC 61000-4-2 Level 2 for handheld device front-end protection.
Operating Temp	−40°C to +85°C - qualified for industrial-grade embedded systems including automotive infotainment and portable medical monitors.

Pinout & Package

Package: 36-contact TQFN (5 mm × 6 mm, 0.5 mm pitch, exposed thermal pad).

Pin/Terminal	Circuit Role	Design Meaning
xOE (A/B)	Active-low 3-state output enable	Isolates A and B buses simultaneously; must be pulled up via resistor during power-up to ensure Hi-Z state.
xSEL (A/B)	Output loading selection	Selects capacitive load drive strength: CL ≤ 10/20/30/50 pF - optimizes timing margin vs. power trade-off.
xAx / xBx	Bi-directional data I/O (8-bit each side)	Auto-sensing direction; tri-states if A→B and B→A transitions overlap - prevents bus contention.
TEST_EN	Test mode activation	Enables forced unidirectional translation (A→B or B→A) for validation and debug; ties to GND in normal use.
OUT_SEL	Output impedance select	Switches between 300 Ω (fast edge) and 2.2 kΩ (reduced EMI) - critical for noise-sensitive RF coexistence designs.
VCCA / VCCB	Independent supply rails	Each powers its respective port's logic and I/O circuitry - eliminates level-shifting bottlenecks in heterogeneous SoC subsystems.
GND / TSTx	Ground / internal test pins	TSTx pins must be tied to GND in production; unused control inputs require termination to VCCI or GND per spec.

Key Features

Feature	Design Value
Automatic direction control	Eliminates need for external DIR signal and associated timing constraints - simplifies PCB routing and firmware logic.
Dual independent supply rails	Permits asymmetric voltage translation (e.g., 1.2V FPGA core ↔ 3.3V PMIC interface) without external bias networks.
Configurable output impedance	300 Ω / 2.2 kΩ selection reduces ringing on long traces or mitigates crosstalk in dense mobile PCB layouts.
Multi-level output loading support	Four selectable CL thresholds (10/20/30/50 pF) allow precise timing closure across varying trace lengths and fan-out counts.
Industrial temperature range	Validated operation from −40°C to +85°C ensures reliability in battery-powered edge devices deployed outdoors or in vehicles.

Applications

Mobile Baseband Interconnect

eMMC/SDIO Host Interface

Use Scenario: Connecting a 1.8V application processor to a 3.3V eMMC 5.1 flash memory in smartphones.

IC Role / Device Role / Timing Role: Bidirectional level shifter handling CMD/DAT lines with automatic direction detection and <7 ns tPD at 3.3V.

Use Value: Enables direct interface without glue logic or clock-domain synchronization, reducing BOM count and layout area.

Use Scenario: Bridging a 1.2V SoC SDIO controller to a 1.8V Wi-Fi module in compact IoT gateways.

IC Role / Device Role / Timing Role: Voltage translator supporting 180 Mbps push-pull signaling and 50 pF load drive per line.

Use Value: Maintains full SDIO 3.0 timing margins while eliminating level-shifter IC count and associated power sequencing complexity.

Automotive Infotainment Display Link

Industrial Sensor Hub Interface

Use Scenario: Interfacing a 2.5V display controller ASIC to a 3.3V LVDS timing generator in automotive head units.

IC Role / Device Role / Timing Role: Dual-rail translator with −40°C to +85°C operation and 2000V HBM ESD protection.

Use Value: Ensures robust signal integrity across wide temperature swings and electrostatic-prone cabin environments.

Use Scenario: Aggregating multiple 1.8V I²C sensors (temperature, humidity, pressure) into a 3.3V microcontroller-based sensor hub.

IC Role / Device Role / Timing Role: 8-bit bidirectional shifter with configurable output loading and tri-state contention management.

Use Value: Prevents bus lock-up during concurrent sensor reads/writes and supports mixed-voltage I²C pull-up configurations.

Equivalent & Alternatives

The following parts are listed as comparable options for similar bidirectional level shifting applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TXS0108E	8-bit, 1.65V–3.6V VCCA/VCCB; no output impedance selection; fixed 50 pF loading; 64-ball BGA package.	Lacks OUT_SEL and xSEL pins - less flexible for EMI-critical or variable-load designs; requires more PCB area.	Choose TXS0108E only if BGA assembly capability exists and output impedance tuning is unnecessary.
SN74AVC8T245	8-bit, 1.2V–3.6V; requires explicit DIR control; higher ICC (20 μA vs. 10 μA); 24-pin TSSOP package.	No automatic direction sensing - adds firmware overhead and timing risk in high-speed burst transfers.	Select SN74AVC8T245 only when deterministic direction control is preferred and board space permits larger TSSOP footprint.

Compared with TXS0108E and SN74AVC8T245, PI4ULS3V08ZFEX uniquely combines automatic direction control, dual-rail flexibility down to 1.2V, output impedance selection, and compact 5×6 mm TQFN - making it optimal for space-constrained, noise-sensitive, and firmware-light mobile and industrial designs.

Availability

PI4ULS3V08ZFEX is available at Aetrix Electronics and suitable for mobile baseband interconnects, eMMC/SDIO host interfaces, and automotive infotainment display links requiring stable component supply, RoHS-compliant packaging, and long-term lifecycle assurance.

Supply support for PI4ULS3V08ZFEX 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 acquired Pericom Semiconductor in 2017 and integrates its high-performance interface solutions into its broad analog and mixed-signal portfolio.

The PI4ULS3V08 belongs to Pericom's Ultra-Low-Voltage Shifter (ULS) product line, engineered specifically for power- and space-constrained mobile platforms requiring seamless voltage domain bridging without direction-control overhead.

FAQ

What is the minimum recommended pull-up resistor value for xOE?

The minimum pull-up resistor value for xOE is determined by the current-sinking capability of the driver driving it. Per the datasheet, xOE should be tied to VCC through a pull-up resistor to ensure high-impedance state during power-up/down; typical values range from 10 kΩ to 100 kΩ depending on VCCB and system noise immunity requirements.

Can PI4ULS3V08ZFEX translate between 1.2V and 3.6V simultaneously?

Yes - VCCA and VCCB are fully independent and can be set to any voltage between 1.2V and 3.6V, including 1.2V on one side and 3.6V on the other. The device guarantees correct logic-level translation and timing performance across this full range, validated per electrical characteristics tables.

Does TEST_EN affect normal operation when left unconnected?

No - TEST_EN is an active-high control input referenced to VCCB. In normal operation, it must be tied to GND. Leaving it floating may cause undefined behavior or unintended entry into test mode, potentially disrupting bidirectional data flow; therefore, hard grounding is mandatory per design guidelines.

How does output impedance selection impact signal integrity?

OUT_SEL selects between 300 Ω (low-Z) for fast edge rates and minimal propagation delay, or 2.2 kΩ (high-Z) to reduce ringing and crosstalk on long or unterminated traces. This allows designers to optimize for speed in short-reach interfaces or EMI robustness in noisy, multi-layer PCB environments.

PI4ULS3V08ZFEX 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:: 2

Channels per Circuit:: 4

Voltage - VCCA:: 1.2 V ~ 3.6 V

Voltage - VCCB:: 1.2 V ~ 3.6 V

Input Signal:: -

Output Signal:: -

Output Type:: Tri-State, Non-Inverted

Data Rate:: 180Mbps

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

Grade:: -

Qualification:: -

Features:: Auto-Direction Sensing

Mounting Type:: Surface Mount

Supplier Device Package:: 36-WFQFN Exposed Pad

PI4ULS3V08ZFEX FAQ

1.How can I place an order for PI4ULS3V08ZFEX through Aetrix?

Please submit a Request for Quotation (RFQ) for PI4ULS3V08ZFEX 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 PI4ULS3V08ZFEX reliable?

The price and inventory of PI4ULS3V08ZFEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI4ULS3V08ZFEX is usually 5 days.

3.What payment methods are accepted for PI4ULS3V08ZFEX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI4ULS3V08ZFEX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PI4ULS3V08ZFEX?

PI4ULS3V08ZFEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PI4ULS3V08ZFEX 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 PI4ULS3V08ZFEX?

For technical support, including PI4ULS3V08ZFEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI4ULS3V08ZFEX requirements.

6.How does Aetrix verify that PI4ULS3V08ZFEX is sourced from the original manufacturer or authorized distributors?

All PI4ULS3V08ZFEX 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 PI4ULS3V08ZFEX meets industry standards.

7.What is the process for return or replacement of PI4ULS3V08ZFEX?

All PI4ULS3V08ZFEX units undergo pre-shipment inspection (PSI). If there is an issue with PI4ULS3V08ZFEX, 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 PI4ULS3V08ZFEX part is unused and in its original packaging.

Return procedure for PI4ULS3V08ZFEX:

1.Submit a request within 90 days.

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

Tech Hub

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…

2026-08-11 LDO Regulator: Dropout Voltage, Noise, PSRR and Power Dissipation

LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…

2026-08-06 Conditional Access Module: CAM, CI/CI+ and DVB Security

Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…

2026-08-03 Electronic Component Obsolescence: EOL Risks, Replacement Options and Last-Time Buy Strategy

Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.

2026-07-29 18650 Battery: Voltage, Capacity, Charging and Pack Design

18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…

2026-07-27 Hall Effect Sensor: Working Principle, Types, Circuits and Applications

Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…

2026-07-20 Product Change Notification (PCN) in Electronic Components: Meaning and Supply Chain Response

Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…

2026-07-19 Blend Door Actuator: Symptoms, Location, Reset and Replacement Guide

A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…