Nexperia USA Inc. 74CBTLV3244PW,118

Overview

74CBTLV3244PW,118 from Nexperia is a dual 4-bit bus switch IC with independent active-low output enables (1OE, 2OE), enabling selective routing of eight bidirectional data lines (1A1–1A4/1B1–1B4 and 2A1–2A4/2B1–2B4) in high-speed digital systems. It operates from 2.3 V to 3.6 V, delivers ≤5 Ω ON-state resistance at 3.3 V, supports rail-to-rail switching, and features IOFF partial power-down protection for hot-swap and mixed-voltage applications such as memory expansion interfaces.

For engineers reviewing the 74CBTLV3244PW,118 datasheet, 74CBTLV3244PW,118 pinout, 74CBTLV3244PW,118 application, or 74CBTLV3244PW,118 equivalent, key selection criteria include guaranteed sub-5 Ω RON at 3.3 V, <0.31 ns propagation delay, Schmitt-triggered enable inputs for noise immunity, -40 °C to +125 °C operation, and TSSOP20 package compatibility with high-density PCB layouts.

Technical Context

This device implements two independent 4-channel single-pole single-throw (SPST) analog bus switches, each controlled by a dedicated active-low enable input. Switch conduction is bidirectional and voltage-agnostic across A/B ports, supporting logic-level translation between domains operating within the same supply rail.

IOFF circuitry actively disables all channels when VCC = 0 V, limiting backflow current to ±50 μA and preventing damage during partial power-down sequences. Schmitt-trigger inputs on both nOE pins provide hysteresis (typ. 0.3 V) to tolerate slow-rising/falling control signals without oscillation.

Key Specifications

Pinout & Package

TSSOP20 (SOT360-1) package: 20-pin plastic thin shrink small outline, 4.4 mm body width, 0.65 mm pitch, 1.1 mm max height. Pin 1 index located at top-left corner; GND (pin 10) and VCC (pin 20) are dedicated power terminals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBT3244PWR and 74LVC2G66GW,125, the 74CBTLV3244PW,118 uniquely combines dual independent 4-bit enables, 125 °C operation, and IOFF protection-making it the only option for thermally demanding, hot-pluggable, or mixed-voltage bus architectures requiring precise per-bank control.

Availability

74CBTLV3244PW,118 is available at Aetrix Electronics and suitable for memory expansion interfaces, hot-swappable module backplanes, LVDS signal multiplexing, and multi-source display data routing requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for 74CBTLV3244PW,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 focused on high-volume, high-reliability logic, discrete, and MOSFET solutions, with leadership in automotive-grade and industrial-standard components.

The 74CBTLV series targets high-speed digital interconnect applications requiring low-latency, low-distortion analog switching with robust power management-designed specifically for memory subsystems, FPGA I/O expansion, and modular computing platforms.

FAQ

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

Per Absolute Maximum Ratings (Table 4), A/B port voltages may range from -0.5 V to VCC + 0.5 V. With VCC = 0 V, this permits -0.5 V to +0.5 V - exceeding this range risks latch-up or permanent damage. IOFF limits leakage but does not extend safe operating voltage beyond these limits.

Can 74CBTLV3244PW,118 be used to switch analog sensor signals below 100 kHz?

Yes - its rail-to-rail analog pass-through, low 4.0 Ω RON, and 14.3 pF ON-capacitance preserve signal fidelity for DC-coupled analog signals up to ~100 MHz. For sub-100 kHz sensors, THD and noise contributions are negligible; ensure source impedance remains <1 kΩ to avoid RC filtering effects.

Is there a recommended PCB layout practice for minimizing crosstalk between adjacent switch channels?

Route A/B pairs differentially with tight coupling and ground guard traces between banks. Place 100 nF ceramic decoupling capacitors within 3 mm of VCC (pin 20) and GND (pin 10). Avoid routing high-speed signals parallel to unused switch pins; terminate unused enables (1OE/2OE) to GND or VCC to prevent floating inputs.

Does the device support mixed-voltage operation - e.g., 2.5 V A-port and 3.3 V B-port?

No - the 74CBTLV3244PW,118 requires a single VCC supply (2.3–3.6 V) powering all internal logic and switch FETs. While A/B ports can pass signals spanning 0 V to VCC, connecting ports to different supply domains risks violating the VSW limit (0 V to VCC) and may cause excessive leakage or latch-up.