Nexperia USA Inc. 74CBTLV3125DS,118

Overview

74CBTLV3125DS,118 from Nexperia is a 4-bit high-speed bus switch IC with independent output enable inputs (1OE–4OE), rail-to-rail data I/O switching, 5 Ω typical ON-resistance at 3.3 V, and operation across 2.3 V to 3.6 V supply. It enables low-latency signal routing in memory expansion, FPGA I/O bridging, and hot-swap peripheral interfaces.

For engineers reviewing the 74CBTLV3125DS,118 datasheet, 74CBTLV3125DS,118 pinout, 74CBTLV3125DS,118 application, or 74CBTLV3125DS,118 equivalent, key selection criteria include guaranteed 0.31 ns max propagation delay at 3.6 V, IOFF-enabled partial power-down protection, Schmitt-triggered OE inputs for noise immunity, and -40 °C to +125 °C temperature rating in SSOP16 package.

Technical Context

This device implements four independent bilateral analog switches controlled by dedicated OE pins, each supporting bidirectional signal flow between A and B ports without directionality constraints. Its CMOS transmission-gate architecture delivers rail-to-rail voltage handling and minimal charge injection.

The IOFF circuit actively disables all switches when VCC = 0 V, blocking backflow current up to ±50 μA - critical for live-insertion systems. Schmitt-triggered OE inputs ensure clean enable/disable transitions even with slow-rising control signals across the full 2.3–3.6 V VCC range.

Key Specifications

Pinout & Package

74CBTLV3125DS,118 uses the SOT519-1 (SSOP16) package: plastic shrink small outline, 16 leads, 3.9 mm body width, 0.635 mm lead pitch, 1.73 mm max height.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 4-bit bus switch applications.

Compared with SN74CBT3125PWR and 74LVC1G3157GW,125, the 74CBTLV3125DS,118 uniquely combines quad-channel integration, guaranteed IOFF, and sub-0.35 ns propagation delay - making it optimal for compact, thermally demanding, and power-sequenced industrial bus architectures.

Availability

74CBTLV3125DS,118 is available at Aetrix Electronics and suitable for memory expansion interfaces, FPGA I/O bridging, and hot-swap peripheral hubs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74CBTLV3125DS,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 logic, analog, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in industrial and consumer electronics.

The 74CBTLV3125 belongs to Nexperia's advanced bus switch product line, engineered specifically for low-latency, low-power, and power-sequencing-resilient signal routing in high-density embedded systems.

FAQ

Can 74CBTLV3125DS,118 operate with 2.5 V and 3.3 V supplies simultaneously?

Yes - the device operates over a continuous 2.3 V to 3.6 V supply range and supports rail-to-rail I/O. Both A and B ports handle signals spanning 0 V to VCC, enabling seamless interfacing between 2.5 V and 3.3 V domains without level shifters. Input thresholds scale with VCC, maintaining compatibility across the full voltage window.

What is the recommended pull-up resistor value for OE pins during power-up?

A 10 kΩ pull-up resistor to VCC is recommended for each OE pin. This ensures the switch remains in high-impedance OFF-state during power ramp-up while limiting current to <330 μA at 3.6 V. The minimum value depends on the driver's sink capability but must exceed 4.7 kΩ to avoid excessive static current in enabled states.

Does 74CBTLV3125DS,118 support hot-plug detection via IOFF?

No - IOFF is a passive leakage-blocking feature activated only when VCC = 0 V. It does not generate status signals or interrupt outputs. Hot-plug detection requires external circuitry (e.g., voltage supervisors or GPIO monitoring); IOFF simply prevents damage during unplanned power loss or insertion.

How does the Schmitt trigger on OE inputs improve system robustness?

The Schmitt trigger provides ≥0.3 V hysteresis on each OE input, rejecting noise spikes and slow-rising edges that could cause metastability or partial switching. This eliminates need for RC filters on enable lines and ensures deterministic ON/OFF transitions even with noisy power rails or long PCB traces - critical in motor-drive or power-conversion environments.