Nexperia USA Inc. 74CBTLV3861PW,118

Overview

74CBTLV3861PW,118 from Nexperia is a 10-bit CMOS bus switch with active-low output enable (OE), designed for high-speed bidirectional data routing in low-voltage digital systems. It provides rail-to-rail switching across A and B ports, 5 Ω typical ON-state resistance at 3.3 V, IOFF-enabled partial power-down protection, and operates from 2.3 V to 3.6 V over –40 °C to +125 °C. Used in PCIe Gen1/2 signal multiplexing, memory interface isolation, and hot-swap I/O buffering.

For engineers reviewing the 74CBTLV3861PW,118 datasheet, 74CBTLV3861PW,118 pinout, 74CBTLV3861PW,118 application, or 74CBTLV3861PW,118 equivalent, key selection criteria include guaranteed sub-5 ns enable/disable timing, <0.31 ns propagation delay, IOFF leakage <±50 μA at VCC = 0 V, Schmitt-triggered OE input for noise immunity, and TSSOP24 package compatibility with 0.65 mm pitch PCB layouts.

Technical Context

This device implements a passive FET-based analog switch architecture-no internal logic or level-shifting-enabling true rail-to-rail signal pass-through with minimal distortion. Each of the ten independent A–B channels features matched ON-resistance (<8 Ω max at 2.5 V, <11 Ω max at 3.3 V) and low OFF-state capacitance (5.2 pF typical), supporting high-fidelity signal integrity up to 406 MHz (–3 dB bandwidth).

The IOFF circuitry actively disables all switches when VCC = 0 V, blocking backflow current even if A/B ports are biased to valid logic levels. Schmitt-trigger action on OE ensures clean transition control across the full 2.3–3.6 V supply range, eliminating sensitivity to slow-rising enable signals in noisy industrial environments.

Key Specifications

Pinout & Package

TSSOP24 (SOT355-1) package: plastic thin shrink small outline, 24-pin, 4.4 mm body width, 0.65 mm lead pitch, 1.1 mm max height. Pin 1 index marked; exposed pad not electrically connected.

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, the 74CBTLV3861PW,118 uniquely delivers synchronized 10-bit switching, IOFF safety, and extended 125 °C operation-making it the only choice for thermally demanding, power-gated embedded systems requiring deterministic bus isolation.

Availability

74CBTLV3861PW,118 is available at Aetrix Electronics and suitable for PCIe Gen1 routing, DDR memory isolation, and industrial hot-swap I/O buffering requiring stable component supply across automotive and industrial temperature grades.

Supply support for 74CBTLV3861PW,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 headquartered in Nijmegen, Netherlands, specializing in high-performance logic, analog, and discrete components for automotive, industrial, and consumer markets.

The 74CBTLV series targets low-voltage, high-speed digital interconnect applications-designed specifically for signal integrity preservation in dense PCB layouts with strict power and thermal constraints.

FAQ

What is the maximum recommended load capacitance for maintaining specified propagation delay?

The datasheet specifies test conditions using 30 pF (2.3–2.7 V) and 50 pF (3.0–3.6 V) loads. At 50 pF and 3.3 V, tpd remains ≤0.31 ns. Exceeding 50 pF increases RC delay nonlinearly; for >60 pF loads, derating curves in Figure 11 show tpd degradation beyond spec limits.

Can OE be left floating during normal operation?

No. OE must be actively driven LOW to enable or HIGH to disable. If left floating, undefined logic levels may cause partial switching or increased ICC. The datasheet mandates pull-up to VCC via resistor (value determined by driver sink capability) to ensure high-impedance OFF-state during power-up/down.

Does the 74CBTLV3861PW,118 support mixed-voltage operation between A and B ports?

No. The device does not provide level shifting. Both A and B ports operate within the same VCC-referenced voltage domain (0 V to VCC). Applying voltages outside [0 V, VCC] risks violating absolute maximum ratings and may trigger clamping diodes or damage the switch FETs.

How is thermal performance affected in the TSSOP24 package at 125 °C ambient?

For SOT355-1, total power dissipation derates linearly at 12.4 mW/K above 110 °C. At 125 °C ambient, Ptot drops to ~482 mW (500 mW − 15 K × 12.4 mW/K). This remains sufficient for typical operation (ICC < 50 μA, ISW < 128 mA per channel), provided PCB copper area meets JEDEC Std. 51-7 guidelines.