Nexperia USA Inc. LSF0204PWJ

Overview

LSF0204PWJ from Nexperia is a 4-channel bidirectional multi-voltage level translator supporting open-drain and push-pull interfaces, with up/down translation rates up to 100 MHz at ≤30 pF load, no direction pin required, and 5 V-tolerant I/O for TTL compatibility - deployed in telecom infrastructure I²C and SMBus interconnects.

For engineers reviewing the LSF0204PWJ datasheet, LSF0204PWJ pinout, LSF0204PWJ application, or LSF0204PWJ equivalent, key selection criteria include per-channel voltage pair flexibility (e.g., 1.2 V ↔ 3.3 V), EN-referenced refA/refB architecture, low R_ON (≤7 Ω), and operation across –40 °C to +125 °C.

Technical Context

The LSF0204PWJ implements passive FET-based bidirectional translation without direction control logic, using separate reference voltages refA and refB to define input/output domains per channel. Its enable (EN) input is referenced to refA, and internal 400 kΩ pull-up ensures defined state during power sequencing.

It supports simultaneous mixed-voltage signaling across four independent A/B pairs, with dynamic performance validated for down-translation ≥100 MHz (CL = 15–30 pF) and up-translation ≤100 MHz (CL = 15–30 pF), while maintaining <5.5 ns typical propagation delay in 1.8 V ↔ 3.3 V translation.

Key Specifications

Pinout & Package

TSSOP14 (SOT402-1) package: plastic thin shrink small outline, 14 leads, 4.4 mm body width, lead pitch 0.65 mm, exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TXS0104E, LSF0204PWJ offers superior voltage-domain flexibility and lower standby current but requires explicit EN control; versus LSF0108, it delivers identical per-channel performance in a space-optimized 14-pin layout ideal for compact telecom modules.

Availability

LSF0204PWJ is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PMBus monitoring, and personal computing SDIO interfacing requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LSF0204PWJ 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

Nexperia is a global semiconductor expert specializing in high-performance, reliable standard-logic and analog devices, with leadership in automotive-qualified and industrial-grade components.

The LSF series targets high-speed, flexible voltage translation in mixed-rail digital systems - designed specifically for seamless interoperability between next-gen low-voltage processors and legacy or higher-voltage peripherals.

FAQ

What is the minimum allowed refA voltage for reliable EN activation?

The EN input threshold is defined as 0.7×VrefA for VrefA = 1.5 V to 4.5 V, and 0.8×VrefA for VrefA = 1.0 V to 1.5 V. Therefore, with VrefA = 1.0 V, EN asserts HIGH at ≥0.8 V. Operation below 1.0 V refA is not characterized and violates recommended conditions.

Can refA and refB be set to the same voltage?

Yes - refA and refB may be tied together to the same supply (e.g., both at 3.3 V) to configure the device as a simple 4-bit buffer with 5 V-tolerant I/O. In this mode, EN still controls channel enable/disable, and R_ON remains ≤3.5 Ω.

Is the LSF0204PWJ compatible with I²C clock stretching?

Yes - its bidirectional, passive-FET architecture inherently supports clock stretching. The device does not insert active logic delay or require clock synchronization, preserving the open-drain nature and arbitration behavior of I²C buses.

How does capacitive load affect maximum operating frequency?

f_max degrades with increasing load: at CL = 15 pF, down-translation supports ≥120 MHz; at CL = 30 pF, ≥120 MHz; at CL = 50 pF, ≥100 MHz. Layout must minimize trace capacitance to sustain rated speed in high-frequency applications like SDIO.