Nexperia USA Inc. LSF0202DCH

Overview

LSF0202DCH from Nexperia is a 2-bit bidirectional multi-voltage level translator supporting open-drain and push-pull interfaces, with up-translation ≤100 MHz and down-translation ≥100 MHz at ≤30 pF load. It features no direction pin, 5 V-tolerant I/Os, and independent channel voltage translation (e.g., 0.95 V ↔ 3.3 V or 1.8 V ↔ 5.0 V), enabling interoperability between mixed-voltage I²C, SMBus, and GPIO subsystems in telecom infrastructure.

For engineers reviewing the LSF0202DCH datasheet, LSF0202DCH pinout, LSF0202DCH application, or LSF0202DCH equivalent, key selection criteria include per-channel reference voltage flexibility, absence of direction control logic, hot-insertion capability, and guaranteed operation from –40 °C to +125 °C across all supported packages.

Technical Context

The LSF0202DCH implements passive FET-based bidirectional translation without internal level-shifting circuitry-voltage translation is defined solely by external refA/refB pins and pull-up configurations. Its EN pin enables high-impedance isolation of both A- and B-side channels simultaneously, critical for bus arbitration and power sequencing.

Unlike unidirectional translators, it supports simultaneous up- and down-translation on each channel depending on signal edge polarity and relative voltage levels, with propagation delays as low as 0.3 ns (tPLH/tPHL) under 15 pF load and 2.3 V refA. Static R_ON ranges from 3 Ω to 7 Ω depending on V_refA, directly impacting signal rise/fall integrity in high-speed digital interfaces.

Key Specifications

Pinout & Package

VSSOP8 package (SOT765-1): plastic very thin shrink small outline, 8 leads, body width 2.3 mm, lead pitch 0.5 mm.

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 LSF0202DCH provides superior flexibility through independent reference inputs, active enable control, and higher bandwidth-making it the preferred choice for telecom and industrial systems requiring dynamic voltage domain management and hot-swap capability.

Availability

LSF0202DCH is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and server BMC designs requiring stable component supply across extended temperature ranges and mixed-voltage interface challenges.

Supply support for LSF0202DCH 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 delivering high-performance logic, analog, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in industrial and computing applications.

The LSF series targets high-speed, low-power bidirectional voltage translation for modern mixed-signal systems-designed specifically to replace discrete MOSFET solutions in I²C, SMBus, MDIO, and GPIO interconnects.

FAQ

What is the maximum capacitive load the LSF0202DCH can drive while maintaining 100 MHz down-translation?

The LSF0202DCH guarantees ≥100 MHz down-translation only at ≤30 pF total capacitive load, as specified in the datasheet. At 50 pF, down-translation drops to ≥50 MHz. Exceeding 30 pF requires signal integrity validation including trace length, termination, and noise margin analysis.

Can refA and refB be set to the same voltage, and what effect does that have?

Yes, refA and refB may be tied to identical voltages (e.g., both at 3.3 V), resulting in unity-gain translation with minimal voltage offset. This configuration preserves logic thresholds symmetrically but forfeits the device's core advantage of asymmetric domain bridging-useful only for simple bus buffering with enhanced drive strength.

Is the LSF0202DCH compatible with open-drain I²C buses operating at 1.8 V and 3.3 V simultaneously?

Yes-the LSF0202DCH natively supports open-drain topologies. Configure refA = 1.8 V (A-side) and refB = 3.3 V (B-side), with external pull-ups on the 3.3 V side only. The device automatically adapts to rising/falling edges without direction control, meeting I²C Fast-mode Plus timing at ≤30 pF load.

Does the EN pin affect leakage current when asserted low?

When EN = LOW, all I/O pins enter high-impedance state with leakage current ≤5 μA per pin (typical), as confirmed in Table 7. This ensures negligible standby power draw and prevents unintended bus loading during system sleep or fault isolation modes.