Nexperia USA Inc. CBT3253DS,118

Overview

CBT3253DS,118 from Nexperia is a dual 1-of-4 TTL-compatible FET multiplexer/demultiplexer in SSOP16 package (SOT519-1), delivering 5 Ω ON-resistance, <0.25 ns propagation delay, and ±1 μA input leakage across -40 °C to +85 °C. It routes two independent A/B data paths under S0/S1 select control with independent 1OE/2OE enables, used in high-speed digital signal routing for FPGA I/O expansion and legacy bus isolation.

For engineers reviewing the CBT3253DS,118 datasheet, CBT3253DS,118 pinout, CBT3253DS,118 application, or CBT3253DS,118 equivalent, key selection criteria include TTL-level compatibility, sub-1 ns enable/disable timing, overvoltage-tolerant control inputs up to 5.5 V, and latch-up immunity exceeding 100 mA per JEDEC JESD78 Class II Level A.

Technical Context

The CBT3253DS,118 implements two independent bidirectional analog/digital switches using low-threshold FETs, each with separate output-enable (1OE, 2OE) and 2-bit binary select (S0, S1) logic. Switch conduction occurs only when both OE pins are LOW, decoupling path selection from enable state.

Its static characteristics specify 3.6–4.2 V pass voltage at 5.0 V supply and 5–7 Ω typical ON resistance at 64 mA, while dynamic behavior guarantees ≤6.4 ns enable time and ≤7.0 ns disable time into 50 pF load - critical for glitch-free bus switching in mixed-voltage systems.

Key Specifications

Pinout & Package

CBT3253DS,118 uses the SOT519-1 SSOP16 package (body width 5.3 mm, lead pitch 0.65 mm), optimized for space-constrained PCB layouts while maintaining thermal performance up to 500 mW total power dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual 1-of-4 multiplexer applications.

Compared with SN74CBT3253PWR and 74LVC253PW, CBT3253DS,118 offers superior overvoltage protection (5.5 V tolerant controls), lower propagation delay (<0.25 ns vs. ≥10 ns), and proven latch-up immunity - making it the preferred choice for robust industrial bus switching where signal integrity and fault resilience are critical.

Availability

CBT3253DS,118 is available at Aetrix Electronics and suitable for FPGA I/O expansion, PCIe slot multiplexing, legacy bus isolation, and automated test equipment requiring stable component supply across extended temperature ranges.

Supply support for CBT3253DS,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 specializing in high-performance, reliable logic, analog, and discrete components for automotive, industrial, and consumer applications.

CBT3253DS,118 belongs to Nexperia's BiCMOS Bus Switch family, engineered specifically for low-latency, bidirectional signal routing in mixed-voltage digital systems where timing predictability and electrical robustness are non-negotiable.

FAQ

Is CBT3253DS,118 pin-compatible with CBT3253D (SO16) and CBT3253PW (TSSOP16)?

Yes - all three variants share identical pin configuration and electrical specifications. The only difference is package type: CBT3253DS,118 uses SSOP16 (SOT519-1), while CBT3253D uses SO16 (SOT109-1) and CBT3253PW uses TSSOP16 (SOT403-1). PCB footprint must match the specific package variant selected.

Can CBT3253DS,118 operate with 3.3 V logic levels on its control inputs?

No - its control inputs (S0, S1, 1OE, 2OE) require TTL-compatible thresholds: VIH ≥2.0 V and VIL ≤0.8 V, but the device itself must be powered by 4.5–5.5 V. For true 3.3 V operation, consider SN74CBT3253PWR, which supports 3.3 V VCC and retains TTL input compatibility.

What is the maximum capacitive load the CBT3253DS,118 can drive while maintaining specified timing?

The datasheet specifies dynamic parameters (tpd, ten, tdis) are characterized with 50 pF load capacitance. Driving loads >50 pF increases propagation and enable/disable delays nonlinearly due to RC time constant effects; for >100 pF, timing margins must be verified empirically or with SPICE simulation using the 18.6 pF on-state capacitance and 5 Ω R_ON.

Does CBT3253DS,118 support hot-swap or live-insertion applications?

It supports controlled hot-swap via independent OE pins: asserting 1OE or 2OE HIGH places the corresponding switch bank in high-impedance OFF-state before power sequencing, preventing backdrive. However, it lacks built-in current limiting or soft-start, so external series resistors or dedicated hot-swap controllers are recommended for full compliance.