Nexperia USA Inc. LSF0108PW-Q100J

Overview

LSF0108PW-Q100 from Nexperia is an AEC-Q100 Grade 1 qualified 8-channel bidirectional multi-voltage level translator supporting open-drain and push-pull interfaces, with up-translation to ≤100 MHz (CL = 30 pF) and down-translation ≥100 MHz (CL = 30 pF), 5 V-tolerant I/O pins, and operation from −40 °C to +125 °C. It enables voltage translation between 0.95 V–5.0 V pairs without direction control, used in automotive I²C, SMBus, and GPIO interconnects.

For engineers reviewing the LSF0108PW-Q100 datasheet, LSF0108PW-Q100 pinout, LSF0108PW-Q100 application, or LSF0108PW-Q100 equivalent, key selection criteria include channel-wise independent voltage pairing, absence of direction pin, flow-through TSSOP20 layout, hot-insertion support, and automotive-grade ESD robustness (HBM >2000 V, CDM >1000 V).

Technical Context

The LSF0108PW-Q100 implements passive FET-based bidirectional level shifting with no internal active logic or direction control-voltage translation is determined solely by external pull-up configurations and reference voltages (refA/refB). Each of its eight A/B channel pairs operates independently, allowing mixed-voltage domain bridging such as 1.8 V ↔ 3.3 V on one pair and 1.2 V ↔ 5.0 V on another.

It supports both open-drain (e.g., I²C, SMBus) and push-pull (e.g., GPIO, UART) signaling via configurable external pull-ups and low R_ON (≤7 Ω typical at 1.0 V refA), with high-impedance I/O when EN = LOW. Propagation delays are load- and voltage-dependent: t_PLH/t_PHL range from 0.75 ns to 2.1 ns across V_refA = 1.5 V–2.3 V and C_L = 15–50 pF.

Key Specifications

Pinout & Package

TSSOP20 package (SOT360-1): plastic thin shrink small outline, 20-pin, 4.4 mm body width, 0.65 mm pitch, side-wettable flanks omitted (not DHVQFN); optimized for automated optical inspection and compact PCB routing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TXS0108E-Q1 and SN74AVC8T245-Q1, the LSF0108PW-Q100 uniquely delivers pinless bidirectionality, open-drain readiness, and sub-µA standby - making it the only choice for automotive I²C expansion where direction pin scarcity and bus contention risk are design constraints.

Availability

LSF0108PW-Q100 is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC I/O expansion, and telecom baseband processor interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LSF0108PW-Q100 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 focused on essential efficiency-enhancing components, delivering high-performance logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.

The LSF series targets automotive and industrial bidirectional level translation, designed specifically to eliminate direction pins and simplify mixed-voltage system integration while meeting AEC-Q100 Grade 1 reliability standards.

FAQ

What is the maximum capacitive load the LSF0108PW-Q100 supports at 100 MHz translation?

The LSF0108PW-Q100 supports ≤100 MHz up-translation and ≥100 MHz down-translation only at ≤30 pF total capacitive load, as verified in the datasheet's dynamic characteristics table. At 50 pF, maximum supported frequency drops to 50 MHz for both directions. Exceeding 30 pF degrades timing margin and may cause setup/hold violations in high-speed interfaces like PMBus or MDIO.

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

Yes, refA and refB may be set to identical voltages (e.g., both at 3.3 V), resulting in unity-gain translation with minimal voltage offset. In this configuration, the device behaves as a low-R_ON bidirectional switch (RON ≈ 3–4 Ω), preserving signal integrity for same-voltage domain buffering-useful for driving heavy capacitive loads or extending trace lengths without repeaters.

Does the LSF0108PW-Q100 require external pull-up resistors, and if so, where?

Yes-external pull-up resistors are mandatory on the B-side (B1–B8) for open-drain operation (e.g., I²C), and optionally on the A-side for push-pull edge-rate control. The datasheet specifies R_PU = 200 kΩ in test circuits; actual values depend on bus speed and capacitance-typical I²C designs use 2.2 kΩ to 10 kΩ on the higher-voltage side to meet rise-time requirements.

How does the EN pin behave during power sequencing, and is there a recommended power-up order?

The EN pin must be held LOW until both refA and refB rails are fully stabilized; applying HIGH before reference voltages settle risks undefined channel states and potential shoot-through. Nexperia recommends powering GND, refA, and refB first, then asserting EN after ≥100 µs stabilization-no external reset circuitry is needed, as the device enters high-Z state automatically on power-up if EN remains un-driven or pulled LOW.