Nexperia USA Inc. CBT3253AD,118

Overview

CBT3253AD,118 from Nexperia is a dual 1-of-4 FET bus switch IC with two independent single-pole, four-throw (SP4T) analog switches, 5 Ω typical ON resistance at 5 V, ±1 μA input leakage current, and operation over -40 °C to +85 °C. It enables bidirectional signal routing in high-speed digital buses, memory address multiplexing, and test access point switching.

For engineers reviewing the CBT3253AD,118 datasheet, CBT3253AD,118 pinout, CBT3253AD,118 application, or CBT3253AD,118 equivalent, this device serves as a low-latency, TTL-compatible analog switch for signal path selection in industrial control backplanes, FPGA I/O expansion, and legacy parallel interface consolidation.

Technical Context

The CBT3253AD implements two independent FET-based SP4T switches using transmission-gate architecture, each controlled by separate active-low output enable (1OE/2OE) and 2-bit binary select (S0/S1) inputs. Switch conduction is bidirectional with no polarity dependence on A/B terminals.

Each switch channel exhibits sub-nanosecond propagation delay (≤0.25 ns), ≤7 ns enable/disable timing, and maintains signal integrity up to 100 MHz due to low 18.6 pF on-state capacitance and 3.8 pF off-state capacitance. Control inputs tolerate 5.5 V regardless of VCC level, enabling mixed-voltage system interfacing.

Key Specifications

Pinout & Package

CBT3253AD,118 is housed in a 16-pin SO16 plastic small outline package (SOT109-1), 3.9 mm body width, 1.27 mm lead pitch, with gull-wing leads and pin 1 index marker.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBT3253PWR and 74LVC2G53DP, the CBT3253AD,118 delivers optimal balance of low power (3 μA ICC), dual SP4T integration, and industry-standard SO16 packaging - making it ideal for compact, multi-channel signal routing where power efficiency and pin compatibility are critical.

Availability

CBT3253AD,118 is available at Aetrix Electronics and suitable for industrial backplane switching, FPGA I/O expansion, and memory address multiplexing requiring stable component supply, full traceability, and lifecycle continuity.

Supply support for CBT3253AD,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 essential efficiency technologies, delivering high-performance logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.

The CBT3253A belongs to Nexperia's advanced bus switch product line, engineered specifically for low-latency, bidirectional signal routing in 5 V digital systems where minimal propagation delay and robust ESD performance are mandatory.

FAQ

What is the maximum continuous current per switch channel?

The CBT3253AD,118 supports up to 128 mA continuous current per switch channel, as specified in the Absolute Maximum Ratings table. This rating applies under recommended operating conditions (VCC = 4.5 V to 5.5 V, Tamb = -40 °C to +85 °C) and assumes proper PCB thermal design with adequate copper pour on VCC and GND planes.

Can the control inputs operate at 3.3 V while VCC is at 5 V?

Yes - the control inputs (S0, S1, 1OE, 2OE) are overvoltage tolerant up to 5.5 V regardless of VCC level. When VCC = 5 V, these inputs accept 3.3 V logic levels directly without external level shifters, satisfying VIH ≥ 2.0 V and VIL ≤ 0.8 V per the Recommended Operating Conditions table.

Is the device suitable for analog signal switching below 1 MHz?

Yes - the CBT3253AD,118 supports analog signal routing with bandwidth exceeding 100 MHz due to its low 18.6 pF on-state capacitance and 5 Ω RON. For signals below 1 MHz, THD remains negligible (<0.01%), and crosstalk is suppressed to <-60 dB by the 3.8 pF off-state capacitance, making it appropriate for audio routing and sensor multiplexing.

Does the SO16 package (SOT109-1) have thermal pad or exposed die attach?

No - the SOT109-1 package used for CBT3253AD,118 is a standard plastic small outline package without an exposed thermal pad or die attach paddle. Thermal dissipation relies solely on lead-frame conduction through the 16 gull-wing leads; junction-to-ambient thermal resistance is 110 K/W per the package outline documentation.