Nexperia USA Inc. CBT3253D,112

Overview

CBT3253D,112 from Nexperia is a dual 1-of-4 TTL-compatible FET multiplexer/demultiplexer in SO16 package, featuring 5 Ω typical ON-resistance, <0.25 ns propagation delay, and ±1 μA input leakage. It operates from -40 °C to +85 °C at 4.5–5.5 V supply and supports bidirectional signal routing in high-speed digital logic interfaces.

For engineers reviewing the CBT3253D,112 datasheet, CBT3253D,112 pinout, CBT3253D,112 application, or CBT3253D,112 equivalent, key selection criteria include low ON-resistance for minimal signal distortion, TTL-level compatibility without level-shifting, overvoltage-tolerant control inputs up to 5.5 V, and high-impedance OFF-state isolation independent of select lines.

Technical Context

The CBT3253D implements two independent 1-of-4 analog/digital switches using low-threshold FETs, enabling bidirectional signal flow between common A ports (1A, 2A) and four B-port channels per section (1B1–1B4, 2B1–2B4). Select lines S0/S1 decode binary addresses while OE pins (1OE, 2OE) provide independent channel enable/disable control with active-LOW logic.

Each switch exhibits sub-7 Ω ON-resistance at 5 V supply and 64 mA test current, with off-state capacitance as low as 3.8 pF (B port) and on-state capacitance of 18.6 pF. Propagation delay is dominated by RC time constant of R_ON and load capacitance, not gate delay, preserving signal integrity in data path switching.

Key Specifications

Pinout & Package

CBT3253D,112 uses the SOT109-1 plastic small outline package (SO16), 16-pin, 3.9 mm body width, with gull-wing leads and standard 1.27 mm pitch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar FET multiplexer applications.

Compared with SN74CBT3253PWR and 74LVC1G3157GW, the CBT3253D,112 uniquely delivers dual 1-of-4 routing, overvoltage-tolerant controls, and sub-0.25 ns propagation delay in a standard SO16 package-making it optimal for high-density, mixed-voltage industrial bus switching where timing and isolation are critical.

Availability

CBT3253D,112 is available at Aetrix Electronics and suitable for PCI Express clock routing, industrial PLC peripheral multiplexing, and embedded memory address decoding requiring stable component supply and long-term industrial temperature support.

Supply support for CBT3253D,112 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 manufacturability in high-volume applications.

The CBT3253 belongs to Nexperia's BiCMOS bus switch family, engineered specifically for low-distortion, high-speed signal routing in industrial, computing, and communications infrastructure where TTL compatibility and robust ESD performance are mandatory.

FAQ

Can CBT3253D,112 operate with 3.3 V control signals while powered at 5 V?

Yes. The S0, S1, 1OE, and 2OE inputs are overvoltage tolerant up to 5.5 V, allowing safe interfacing with 3.3 V logic families even when VCC is 5 V. Input thresholds remain fixed at 0.8 V (VIL) and 2.0 V (VIH), ensuring reliable recognition of 3.3 V logic levels without external resistors or translators.

What is the maximum continuous current per switch channel?

The absolute maximum continuous switch current is 128 mA per channel, as specified in Table 4 (Limiting Values). At this current, R_ON remains ≤7 Ω (typical 5 Ω), and power dissipation stays within the 500 mW total device limit. Derating is recommended above 85 °C ambient.

Does CBT3253D,112 support hot-swap or live-insertion?

It supports limited hot-swap capability due to its -1.2 V input clamping voltage and 2000 V HBM ESD rating, but lacks dedicated hot-swap control features like slew-rate limiting or fault reporting. External series resistors and local decoupling are advised to manage inrush and transient currents during live insertion.

Is there any risk of signal corruption when both OE pins are HIGH simultaneously?

No. When either 1OE or 2OE is HIGH, its associated section enters high-impedance OFF-state regardless of S0/S1 states. Both sections being disabled simultaneously fully isolates all A and B ports - no sneak paths or leakage-induced logic contention occurs, as confirmed by Table 3 (Function Selection).