Nexperia USA Inc. 74CBTLV3861BQ,118

Overview

74CBTLV3861BQ,118 from Nexperia is a 10-bit CMOS bus switch with active-low output enable (OE), designed for high-speed bidirectional signal routing in low-voltage digital systems. It provides rail-to-rail switching across A and B ports, features 5 Ω typical ON-state resistance at 3.3 V, supports 2.3 V to 3.6 V supply operation, and includes IOFF circuitry for partial power-down protection. It is used in memory expansion interfaces and hot-swap I/O buffering applications.

For engineers reviewing the 74CBTLV3861BQ,118 datasheet, 74CBTLV3861BQ,118 pinout, 74CBTLV3861BQ,118 application, or 74CBTLV3861BQ,118 equivalent, key selection criteria include guaranteed sub-5 ns enable/disable timing, ±1000 V CDM ESD rating, -40 °C to +125 °C extended temperature operation, and DHVQFN24 thermal-enhanced package compatibility with high-density PCB layouts.

Technical Context

This device implements a 10-channel analog bus switch topology with Schmitt-triggered OE input, enabling robust noise immunity across its full 2.3–3.6 V VCC range. Each channel exhibits rail-to-rail conduction when enabled and true high-impedance OFF-state isolation when disabled - critical for signal integrity in mixed-supply domains.

The IOFF circuit ensures leakage current remains below ±50 μA during power-down, preventing backflow through powered-down sections. Its dynamic performance includes 0.20 ns typical propagation delay (VCC = 3.3 V) and 406 MHz -3 dB bandwidth, confirming suitability for high-speed parallel data paths up to 200 Mbps.

Key Specifications

Pinout & Package

DHVQFN24 (SOT815-1) package: 3.5 × 5.5 × 0.85 mm body, 24-terminal no-lead quad flat design with exposed thermal pad; optimized for thermal dissipation and high-density routing on compact PCBs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 10-bit bus switch applications.

Compared with SN74CBT3861PWR and 74LVC1G3157GW,125, the 74CBTLV3861BQ,118 uniquely combines 10-channel integration, IOFF protection, Schmitt-triggered control, and DHVQFN thermal performance - making it the sole option for space-constrained, hot-pluggable, or mixed-power-domain designs requiring guaranteed sub-5 ns timing.

Availability

74CBTLV3861BQ,118 is available at Aetrix Electronics and suitable for memory expansion interfaces, hot-swap I/O buffering, low-voltage FPGA I/O translation, and high-speed parallel test access requiring stable component supply across industrial temperature ranges.

Supply support for 74CBTLV3861BQ,118 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, and energy-efficient components for automotive, industrial, computing, consumer, and communications markets.

The 74CBTLV series targets high-speed digital interconnect applications, emphasizing low-latency switching, robust ESD resilience, and seamless integration into mixed-voltage system architectures.

FAQ

What is the maximum allowable voltage on A/B pins when VCC = 0 V?

The absolute maximum rating permits -0.5 V to VCC + 0.5 V on A/B pins. With VCC = 0 V, this means -0.5 V to +0.5 V. Exceeding this range risks permanent damage per IEC 60134 limiting values. The IOFF circuit actively clamps leakage but does not extend safe operating voltage beyond these limits.

Can OE be driven directly from a 1.8 V logic output?

No. The VIH minimum is 2.0 V at VCC ≥ 3.0 V and 1.7 V at VCC ≤ 2.7 V. A 1.8 V driver falls below both thresholds and may result in undefined switching behavior. A level shifter or pull-up to VCC is required to ensure reliable HIGH detection.

Is the exposed thermal pad (pin 1 index area) required to be soldered?

No. Per datasheet note, the pad has no electrical or mechanical requirement to be soldered. If soldered, it must remain electrically floating or be connected to GND - never to VCC or signal nets - to avoid compromising thermal or electrical performance.

How does the 74CBTLV3861BQ,118 behave during power-up when OE is unconnected?

With OE floating, the Schmitt-trigger input may settle unpredictably, risking momentary channel activation. To guarantee high-impedance OFF-state during power sequencing, OE must be pulled up to VCC via an external resistor - minimum value determined by the driving source's sink capability, typically 10 kΩ.