Diodes Incorporated PI4ULS5V202XVEX

Overview

PI4ULS5V202XVEX 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 ultra-compact UDFN-8 (1.2 × 1.6 mm) package. It enables I²C/SMBus voltage translation between 1.2 V and 5.5 V domains without direction control, ideal for space-constrained mobile and embedded interfaces.

For engineers reviewing the PI4ULS5V202XVEX datasheet, PI4ULS5V202XVEX pinout, PI4ULS5V202XVEX application, or PI4ULS5V202XVEX equivalent, key selection criteria include dual-rail voltage flexibility (1.2–5.5 V per port), EN-controlled tri-state operation, open-drain compatibility (2 Mb/s), low bit-to-bit skew (<5 ns), and RoHS/Green compliance in an ultra-tiny DFN package.

Technical Context

The PI4ULS5V202XVEX implements auto-sensing bidirectional translation using one-shot edge detectors per channel to determine signal direction dynamically-eliminating need for external direction control logic. Each I/O pair (A1/B1 and A2/B2) operates independently with rail-to-rail input/output thresholds referenced to its respective supply (VCCA or VCCB).

It supports both push-pull (20 Mb/s max) and open-drain (2 Mb/s max) configurations, with propagation delays ≤20 ns and part-to-part skew ≤5 ns across all tested VCCA/VCCB combinations. The EN pin-referenced to VCCA-enables full I/O tri-state with sub-1 µA leakage in disable mode.

Key Specifications

Pinout & Package

Package: UDFN-8 (XV), 1.2 mm × 1.6 mm, 0.4 mm pitch, exposed thermal pad (non-electrical), RoHS/Green compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TXS0102DCUR and PCA9306DCUR, the PI4ULS5V202XVEX uniquely combines ultra-compact UDFN-8 packaging, EN-controlled tri-state, full 1.2–5.5 V dual-rail flexibility, and integrated pull-ups-making it optimal for next-gen miniaturized, power-aware, and bus-shared embedded systems.

Availability

PI4ULS5V202XVEX is available at Aetrix Electronics and suitable for I²C/SMBus interface bridging, mobile camera module design, and low-power wearable sensor hub development requiring stable component supply and long-term lifecycle assurance.

Supply support for PI4ULS5V202XVEX 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 components for consumer, computing, industrial, and automotive markets.

The PI4ULS5V202 belongs to Diodes' Pericom® logic and interface product line, engineered specifically for low-latency, space-constrained voltage translation in portable and embedded systems with mixed-voltage architectures.

FAQ

What is the function of the EN pin on PI4ULS5V202XVEX?

The EN pin is an active-high enable input referenced to VCCA. When driven low, it places all I/O pins (A1, A2, B1, B2) into high-impedance tri-state mode, reducing supply current to ≤1 µA per rail. This enables dynamic bus isolation in multi-master I²C systems and supports power-gating strategies in battery-operated devices.

Can PI4ULS5V202XVEX translate between 1.2 V and 5.5 V simultaneously?

Yes. VCCA and VCCB can be set independently within 1.2 V to 5.5 V-verified across all combinations including 1.2 V ↔ 5.5 V. Propagation delay remains ≤20 ns and MDR stays at 20 Mb/s (push-pull), with rise/fall times adjusted per rail (e.g., tRA ≤30 ns, tRB ≤15 ns at VCCA=1.2 V, VCCB=5.5 V).

Does PI4ULS5V202XVEX require external pull-up resistors for I²C operation?

No. It integrates 10 kΩ pull-up resistors on all four I/O lines (A1, A2, B1, B2), referenced to their respective supply rails (VCCA or VCCB). These meet standard I²C bus requirements; external resistors are optional only if lower effective resistance (e.g., <10 kΩ) is needed for faster rise times.

Is PI4ULS5V202XVEX qualified for automotive applications?

The PI4ULS5V202XVEX is not AEC-Q100 qualified. Diodes offers automotive-grade variants (e.g., PI4ULS5V202QVEX) with PPAP capability, IATF 16949 manufacturing, and extended temperature range (−40 °C to +125 °C). For automotive use, contact Diodes or Aetrix for qualified alternatives.