Nexperia USA Inc. 74CBTLVD3245BQ-Q1X

Overview

74CBTLVD3245BQ-Q1X from Nexperia is an automotive-grade 8-bit bidirectional level-shifting bus switch with active-low output enable (OE), designed for voltage translation between 3.0 V and 3.6 V domains. It features 5 Ω typical ON-state resistance, rail-to-rail switching, IOFF partial power-down protection, and AEC-Q100 Grade 1 qualification (−40 °C to +125 °C). It is used in automotive infotainment backplane interconnects requiring low-latency, low-capacitance signal routing.

For engineers reviewing the 74CBTLVD3245BQ-Q1X datasheet, 74CBTLVD3245BQ-Q1X pinout, 74CBTLVD3245BQ-Q1X application, or 74CBTLVD3245BQ-Q1X equivalent, key selection criteria include its 0.22 ns max propagation delay, 2.5 pF OFF-state capacitance, Schmitt-triggered OE input for noise immunity, and DHVQFN20 package with side-wettable flanks for AOI-compatible solder joint inspection.

Technical Context

This device implements eight independent analog MOSFET switches controlled by a single active-low OE input. Each channel provides bidirectional, rail-to-rail conduction with no internal level-shifting circuitry-voltage translation occurs passively via I/O port biasing. The IOFF circuit ensures sub-50 µA leakage when VCC = 0 V, enabling safe hot-insertion and partial power-down operation.

It uses CMOS process technology with Schmitt-trigger inputs on OE to tolerate slow edge rates up to 200 ns/V, and meets JESD8-B/JESD36 interface standards for 3.0–3.6 V systems. The DHVQFN20 package supports thermal performance up to 125 °C ambient with linear derating above 111 °C.

Key Specifications

Pinout & Package

DHVQFN20 package (SOT764-1), 2.5 mm × 4.5 mm × 0.85 mm body, side-wettable flanks for automated optical inspection (AOI).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit bidirectional bus switch applications.

Compared with SN74CBT3245QPWRQ1 and 74LVC2G66DP-Q100, the 74CBTLVD3245BQ-Q1X uniquely combines AEC-Q100 Grade 1, IOFF, DHVQFN20 with AOI support, and sub-0.25 ns propagation delay-making it the only option qualified for high-speed, safety-critical 3.3 V bus switching in modern automotive ECUs.

Availability

74CBTLVD3245BQ-Q1X is available at Aetrix Electronics and suitable for automotive infotainment backplanes, ADAS sensor multiplexing, and body control module I/O expansion requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74CBTLVD3245BQ-Q1X 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, reliable components for automotive, industrial, and consumer markets, with leadership in logic, MOSFETs, and ESD protection.

The 74CBTLVD3245BQ-Q1X belongs to Nexperia's automotive-qualified CBTLV logic family, engineered specifically for low-latency, low-power, high-reliability voltage-domain bridging in next-generation vehicle electronics.

FAQ

What is the maximum allowable voltage difference between A-port and B-port during switching?

The device does not impose a fixed voltage differential limit between A and B ports. Operation is valid as long as both ports remain within −0.5 V to VCC + 0.5 V (per Table 4), and the switch current stays within ±128 mA. In practice, simultaneous connection of 3.3 V and 3.6 V domains is supported, but sustained reverse bias beyond diode drop may increase leakage.

Can the 74CBTLVD3245BQ-Q1X be used for unidirectional signal translation?

Yes-it functions identically in either direction due to symmetrical FET structure. When used unidirectionally (e.g., A→B only), the B-port must still be terminated or driven to avoid floating nodes, and the same 3.0–3.6 V supply constraints apply. No configuration change is needed.

How does the IOFF feature behave when VCC is ramping during power-up?

IOFF activates automatically when VCC drops below ~1.0 V and remains active until VCC exceeds ~1.5 V. During power-up, the switch remains in high-impedance state until VCC stabilizes within specification, preventing glitch-induced backfeed into partially powered subsystems-a key requirement for ASIL-B compliant designs.

Is the DHVQFN20 package compatible with standard reflow profiles for lead-free soldering?

Yes-the SOT764-1 package is qualified for IPC/JEDEC J-STD-020D moisture sensitivity level 3 and supports peak reflow temperatures up to 260 °C. Its side-wettable flanks are optimized for standard stencil printing and convection reflow, with recommended preheat ramp rate ≤3 °C/s and time above liquidus of 60–90 seconds.