Nexperia USA Inc. 74CBTLV3245BQ-Q10X

Overview

74CBTLV3245BQ-Q10X from Nexperia is an automotive-qualified 8-bit bidirectional bus switch with active-low output enable (OE), designed for high-speed signal routing in 2.3 V to 3.6 V systems. It features 5 Ω typical ON-state resistance, rail-to-rail switching, and IOFF partial power-down protection. Used in infotainment data buses and ADAS sensor interface multiplexing where low-latency, low-leakage signal isolation is required.

For engineers reviewing the 74CBTLV3245BQ-Q10X datasheet, 74CBTLV3245BQ-Q10X pinout, 74CBTLV3245BQ-Q10X application, or 74CBTLV3245BQ-Q10X equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification, sub-0.3 ns propagation delay at 3.3 V, DHVQFN20 package with side-wettable flanks for AOI, and IOFF-enabled hot-swap capability in powered-down subsystems.

Technical Context

This device implements eight independent CMOS transmission-gate switches controlled by a single OE input. Each channel operates bidirectionally with no internal direction control-signal flow follows voltage potential between A and B ports. Schmitt-trigger inputs on OE ensure robust timing margin against slow-rising control signals in noisy automotive environments.

The IOFF circuit actively disables all switches when VCC = 0 V, limiting backflow current to ±50 μA across A/B ports. Its ON-resistance remains stable below 11 Ω over -40 °C to +125 °C at 3.3 V supply, enabling consistent impedance matching in high-frequency data paths up to 406 MHz (-3 dB bandwidth).

Key Specifications

Pinout & Package

DHVQFN20 package (SOT764-1): 2.5 mm × 4.5 mm × 0.85 mm body, no leads, side-wettable flanks for automated optical inspection (AOI) of solder joints. Exposed thermal pad (GND(1)) is electrically isolated unless explicitly connected to system ground.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBT3245QPWRQ1, the 74CBTLV3245BQ-Q10X offers lower static current and superior manufacturability via side-wettable flanks; versus 74LVC2G66DP-Q100, it delivers 4× channel density in one footprint, reducing interconnect complexity and signal skew in multi-lane interfaces.

Availability

74CBTLV3245BQ-Q10X is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS sensor hubs, and body control modules requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for 74CBTLV3245BQ-Q10X 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 leading semiconductor manufacturer specializing in high-performance, high-reliability logic, analog, and discrete components, with core expertise in automotive-grade silicon solutions.

The 74CBTLV series targets high-speed, low-power bus switching in automotive and industrial applications, emphasizing signal integrity, power-domain isolation, and AEC-Q100-compliant robustness.

FAQ

Does 74CBTLV3245BQ-Q10X support hot-swap operation?

Yes. Its IOFF circuitry actively disables all switches and limits backflow current to ±50 μA when VCC = 0 V, allowing safe insertion/removal while A/B ports remain powered. This meets automotive hot-swap requirements for modular ECUs and serviceable infotainment modules without system reset.

What is the maximum data rate supported by this bus switch?

The device supports signal integrity up to 406 MHz (-3 dB bandwidth at 3.3 V), corresponding to NRZ data rates exceeding 800 Mbps with acceptable eye opening. Real-world performance depends on PCB layout, load capacitance, and termination; measured propagation delay is ≤0.31 ns at 3.3 V.

Can OE be driven directly from a 1.8 V microcontroller GPIO?

No. The VIH threshold is 2.0 V minimum at VCC = 3.0–3.6 V, so a 1.8 V logic HIGH fails to guarantee reliable enable activation. A level shifter or pull-up to VCC is required to meet the 2.0 V VIH specification and avoid metastable switching behavior.

Is the exposed thermal pad (GND(1)) required to be soldered?

No. Terminal 1 is electrically isolated and has no internal connection. If soldered, the land must remain floating or be tied to system ground-no electrical requirement exists, but grounding improves thermal dissipation and EMI performance in high-density layouts.