Nexperia USA Inc. 74LVC4245AD-Q100J

Overview

74LVC4245AD-Q100 from Nexperia is an automotive-grade octal dual-supply translating transceiver with 3-state bus-compatible outputs in both directions, enabling bidirectional level translation between 3 V (VCC(B): 1.5–3.6 V) and 5 V (VCC(A): 1.5–5.5 V) buses. It features independent DIR and active-low OE controls, Schmitt-trigger inputs for noise immunity, and AEC-Q100 Grade 1 qualification (−40 °C to +125 °C). It is used in automotive infotainment backplane interfaces where mixed-voltage subsystems require isolated, direction-controlled data exchange.

For engineers reviewing the 74LVC4245AD-Q100 datasheet, 74LVC4245AD-Q100 pinout, 74LVC4245AD-Q100 application, or 74LVC4245AD-Q100 equivalent, key selection criteria include dual-supply voltage flexibility, guaranteed 3-state isolation during suspend mode, propagation delay ≤8.5 ns (Bn→An at 3.3 V), 5 V-tolerant control inputs up to 5.5 V, and DHVQFN24 package compatibility with AOI-enabled solder joint inspection.

Technical Context

This transceiver implements a true bidirectional, direction-controlled level-shifting architecture: DIR selects data flow direction (A→B or B→A), while OE (active LOW) independently places all outputs in high-impedance state regardless of DIR or supply status. Its dual-supply design enforces VCCA ≥ VCCB during normal operation but allows zero-current isolation when either supply drops to 0 V - critical for automotive power sequencing.

Schmitt-trigger inputs on DIR, OE, and all data lines provide hysteresis (typ. 0.3–0.5 V) to tolerate slow-rising signals and reduce noise-induced switching. The device complies with JEDEC JESD8B/JESD36 for 3.3 V logic interfacing and supports TTL-level recognition at 3.3 V, making it interoperable with legacy 5 V peripherals without external resistors.

Key Specifications

Pinout & Package

DHVQFN24 (SOT815-1) package: 3.5 × 5.5 × 0.85 mm body, side-wettable flanks for automated optical inspection (AOI) of solder joints; thermally enhanced for automotive under-hood applications.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-supply translating transceiver applications.

Compared with SN74AVC4T245QPWRQ1 and TXB0108PWR, the 74LVC4245AD-Q100 uniquely delivers octal width, explicit DIR control for deterministic timing, 5 V-tolerant logic inputs, and full AEC-Q100 Grade 1 qualification - making it the sole choice for production automotive 8-bit parallel bus translation where timing predictability and qualification are mandatory.

Availability

74LVC4245AD-Q100 is available at Aetrix Electronics and suitable for automotive infotainment interfaces, ADAS sensor hubs, body control gateways, and electric power steering subsystems requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for 74LVC4245AD-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 technologies, delivering high-performance logic, analog, and MOSFET solutions optimized for automotive, industrial, and mobile markets.

The 74LVC4245A-Q100 belongs to Nexperia's automotive-qualified LVC logic family, designed specifically for robust, low-power level translation in harsh-temperature vehicle subsystems where mixed-voltage interoperability and AEC-Q100 compliance are non-negotiable.

FAQ

Can 74LVC4245AD-Q100 operate with VCC(A) = 3.3 V and VCC(B) = 1.8 V?

Yes - the device supports VCC(A) from 1.5 V to 5.5 V and VCC(B) from 1.5 V to 3.6 V, with VCC(A) ≥ VCC(B) required during normal operation. At VCC(A) = 3.3 V and VCC(B) = 1.8 V, it translates between 3.3 V logic and 1.8 V logic domains while maintaining 24 mA drive strength on the A-side and 5 V tolerance on control inputs. Propagation delay increases slightly (typ. 5.0 ns Bn→An) but remains within specification.

What happens to outputs when VCC(A) = 0 V but VCC(B) is active?

When VCC(A) = 0 V and VCC(B) is powered, all A-side outputs enter high-impedance state automatically, and no current flows from B-side to A-side - satisfying the "suspend mode" requirement. B-side outputs remain functional and can drive 3 V logic, while DIR and OE retain valid logic thresholds referenced to VCC(B). This enables safe partial-power-down scenarios in automotive modules.

Is the DHVQFN24 package of 74LVC4245AD-Q100 compatible with standard reflow profiles?

Yes - the SOT815-1 DHVQFN24 package is qualified for lead-free reflow per JEDEC J-STD-020 Rev. E, with peak temperature up to 260 °C. Its side-wettable flanks do not alter thermal mass or profile requirements; standard automotive-grade reflow profiles (e.g., IPC-7531 Class 3) apply. No special stencil or placement adjustments are needed beyond standard QFN guidelines.

Does 74LVC4245AD-Q100 support hot insertion between live 3 V and 5 V buses?

It supports controlled hot insertion: 5 V-tolerant inputs (up to 5.5 V) and overvoltage-safe control pins allow connection to a live 5 V bus while VCC(B) is ramping. However, simultaneous hot insertion into both live buses is not recommended - OE should be held HIGH (disabled) until both supplies stabilize and DIR is set, preventing bus contention during power-up transients.