Nexperia USA Inc. 74CBTLV3257BQ,115

Overview

74CBTLV3257BQ,115 from Nexperia is a quad 1-of-2 high-speed analog multiplexer/demultiplexer in DHVQFN16 package, operating from 2.3 V to 3.6 V, featuring 5 Ω typical ON-resistance, <0.25 ns propagation delay, and rail-to-rail signal switching - used in high-density FPGA I/O expansion and low-voltage data path routing.

For engineers reviewing the 74CBTLV3257BQ,115 datasheet, 74CBTLV3257BQ,115 pinout, 74CBTLV3257BQ,115 application, or 74CBTLV3257BQ,115 equivalent, this page delivers verified functional behavior, thermal-enhanced QFN package details, Schmitt-trigger control tolerance, IOFF partial power-down support, and real-world demux/mux timing constraints for 3.3 V logic systems.

Technical Context

This device implements four independent bidirectional analog switches, each selectable via shared S (select) and OE (output enable) inputs. Its CMOS transmission-gate architecture enables rail-to-rail voltage handling across all I/O ports with no level-shifting requirement.

Schmitt-trigger action on S and OE inputs ensures robust operation with slow-rising/falling control signals across the full 2.3–3.6 V supply range. The IOFF circuit actively disables outputs during power-down, preventing backflow current when VCC = 0 V.

Key Specifications

Pinout & Package

DHVQFN16 (SOT763-1) package: 2.5 × 3.5 × 0.85 mm body, 16-terminal no-lead thermal-enhanced quad flat design with exposed thermal pad (non-soldered or floating GND).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar analog multiplexer/demultiplexer applications.

Compared with SN74CBTLV3257PWR and 74LVC1G3157GW,125, the 74CBTLV3257BQ,115 delivers superior thermal management via DHVQFN, guaranteed 125 °C operation, and true quad integration - making it optimal for compact, high-reliability embedded systems requiring minimal component count and maximum signal fidelity.

Availability

74CBTLV3257BQ,115 is available at Aetrix Electronics and suitable for PCIe Gen3 routing, FPGA I/O expansion, automotive camera switching, and industrial PLC analog multiplexing requiring stable component supply across extended temperature ranges.

Supply support for 74CBTLV3257BQ,115 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 automotive, industrial, and computing markets.

The 74CBTLV3257 belongs to Nexperia's advanced bus switch family, engineered specifically for low-voltage, high-bandwidth signal routing in space-constrained and thermally aggressive applications.

FAQ

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

The datasheet specifies test conditions using 30–50 pF load capacitance (CL) with 500 Ω termination. At CL = 50 pF and VCC = 3.3 V, tpd remains ≤5.3 ns. Exceeding 50 pF increases RC delay nonlinearly; for >60 pF loads, derating curves in Figure 10 must be consulted to confirm timing margin.

Can the 74CBTLV3257BQ,115 be used with 1.8 V logic control signals?

No - the minimum VCC is 2.3 V, and VIH requires ≥2.0 V at VCC ≥2.7 V. Driving S/OE with 1.8 V violates the 2.0 V VIH threshold and risks unreliable switching. A level shifter (e.g., TXS0102) is required for 1.8 V controller interfacing.

Is the exposed thermal pad on the DHVQFN package electrically connected?

No - the thermal pad (terminal 1 index area) has no electrical function. It may remain floating or be connected to GND for thermal improvement, but soldering is optional and imposes no electrical requirement per datasheet Note (1) in Section 6.1.

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

IOFF activates automatically when VCC drops below ~0.8 V, disabling outputs before supply collapse. During power-up, OE must be held HIGH (via pull-up) until VCC stabilizes above 2.3 V to prevent unintended channel conduction - per recommendation in Section 1 of the datasheet.