Nexperia USA Inc. 74CBTLV3125PW,118

Overview

74CBTLV3125PW,118 from Nexperia is a 4-bit high-speed bus switch IC with independent output enable inputs (1OE–4OE), designed for bidirectional signal routing in low-voltage 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. It is used in memory expansion interfaces and hot-swap I/O buffering where minimal propagation delay (<0.31 ns) and low leakage (<±1 μA) are critical.

For engineers reviewing the 74CBTLV3125PW,118 datasheet, 74CBTLV3125PW,118 pinout, 74CBTLV3125PW,118 application, or 74CBTLV3125PW,118 equivalent, key selection criteria include its TSSOP14 package footprint, 4-channel independent enable control, guaranteed -40 °C to +125 °C operation, Schmitt-triggered OE inputs for noise immunity, and compliance with JEDEC JESD8-B/JESD36 standards.

Technical Context

This device implements four independent analog/digital bidirectional switches, each controlled by a dedicated OE input. Each switch exhibits rail-to-rail conduction, enabling full-swing signal pass-through without level shifting. The IOFF circuit actively disables outputs when VCC = 0 V, preventing backflow current during partial power-down sequences.

Its Schmitt-triggered OE inputs tolerate slow edge rates (up to 200 ns/V), ensuring reliable enable/disable timing across the full 2.3 V–3.6 V supply range. Dynamic performance is characterized by sub-nanosecond propagation delay (≤0.31 ns at 3.6 V) and fast enable/disable times (≤6.0 ns), making it suitable for high-speed address/data bus isolation in FPGA and microcontroller peripheral interfaces.

Key Specifications

Pinout & Package

TSSOP14 (SOT402-1) package: plastic thin shrink small outline, 14-lead, 4.4 mm body width, 0.65 mm lead pitch, exposed pad optional (non-functional ground connection).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBT3125PWR, the 74CBTLV3125PW,118 offers lower RON and higher bandwidth for tighter timing budgets; versus 74LVC1G3157GW,125, it provides integrated 4-channel control and smaller board area despite larger package.

Availability

74CBTLV3125PW,118 is available at Aetrix Electronics and suitable for industrial automation controllers, telecom baseband processing units, and automotive infotainment head units requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74CBTLV3125PW,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, analog, and MOSFET solutions for industrial, automotive, and computing markets.

The 74CBTLV series targets high-speed digital interface applications demanding low-latency, low-power, and robust partial-power-down behavior - specifically engineered for memory expansion, FPGA I/O buffering, and hot-swap subsystems.

FAQ

Can 74CBTLV3125PW,118 operate at 1.8 V supply?

No. The device is specified only for 2.3 V to 3.6 V operation per Table 5. At 1.8 V, VIH minimum (2.0 V at VCC ≥ 3.0 V) cannot be met, and RON increases significantly beyond datasheet limits. Use 74LVC1G3157 or 74AUP1G66 for true 1.8 V compatibility.

Is the exposed pad on TSSOP14 (SOT402-1) electrically connected?

No. Per Figure 20 and datasheet note, the exposed pad is a mechanical thermal enhancement feature only. It has no electrical function and must remain floating or be connected to GND solely for thermal improvement - no electrical tie is required or recommended for signal integrity.

What is the maximum capacitive load this switch can drive reliably?

Based on tpd = 0.31 ns max and typical CS(ON) = 14.3 pF, the switch maintains signal integrity up to 50 pF total load capacitance (including PCB trace and destination input). Beyond that, propagation delay increases nonlinearly; for >50 pF loads, verify timing margins using the RC model in Section 10.

How does the IOFF feature behave when VCC is ramping during power-up?

IOFF activates automatically when VCC drops below ~0.8 V, forcing outputs into high-impedance state before supply rails collapse. During power-up, outputs remain disabled until VCC exceeds 1.5 V (per functional table), ensuring no bus contention occurs - no external pull-up on OE is needed for IOFF activation.