Nexperia USA Inc. CBT3253DS,112

Overview

CBT3253DS,112 from Nexperia is a dual 1-of-4 TTL-compatible FET multiplexer/demultiplexer in SSOP16 (SOT519-1) package, featuring 5 Ω typical ON-resistance, <0.25 ns propagation delay through the switch path, and ±1 μA input leakage current. It enables bidirectional signal routing between two independent A/B port pairs under independent select (S0/S1) and output-enable (1OE/2OE) control, used in high-speed digital bus switching and I/O expansion circuits.

For engineers reviewing the CBT3253DS,112 datasheet, CBT3253DS,112 pinout, CBT3253DS,112 application, or CBT3253DS,112 equivalent, key selection criteria include its 5 Ω low-ON-resistance switch performance, TTL-level compatibility with overvoltage-tolerant control inputs up to 5.5 V, -40 °C to +85 °C industrial temperature range, and SO/TSSOP/SSOP package variants for board space optimization.

Technical Context

The CBT3253DS,112 implements two independent 1-of-4 analog/digital switches using FET-based transmission gates, each controlled by shared S0/S1 address lines and dedicated active-low OE pins (1OE, 2OE). Its architecture supports simultaneous or isolated channel selection without crosstalk, with disable states placing all B-port terminals in high-impedance mode regardless of select inputs.

Switch operation is defined by static ON-resistance (5–7 Ω at VI = 0 V, II = 64 mA), dynamic timing (tpd ≤ 6.2 ns, ten ≤ 6.4 ns), and low capacitive loading (Cio(on) = 18.6 pF, CI = 4.5 pF), enabling clean signal integrity in 5 V TTL systems with minimal ground bounce or propagation delay penalty.

Key Specifications

Pinout & Package

CBT3253DS,112 is packaged in SSOP16 (SOT519-1), a 16-pin plastic shrink small outline package with 0.65 mm lead pitch and 4.4 mm body width, optimized for high-density PCB layouts while maintaining hand-solderability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBT3253PWR and 74LVC253PW,118, the CBT3253DS,112 uniquely combines 5 V TTL compatibility, 5.5 V overvoltage-tolerant controls, and industrial temperature range-making it the only option for robust 5 V bus switching without external level-shifting or derating.

Availability

CBT3253DS,112 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, PCIe lane failover, legacy bus signal switching, and automated test equipment signal routing requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CBT3253DS,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 focused on high-volume, high-reliability logic, analog, and discrete components, serving automotive, industrial, and consumer markets with scalable manufacturing and rigorous quality standards.

The CBT3253 series belongs to Nexperia's high-speed logic portfolio designed specifically for low-latency, low-distortion signal routing in 5 V digital systems-prioritizing ON-resistance, propagation delay, and robustness over power efficiency or multi-supply flexibility.

FAQ

What is the maximum continuous current per switch channel in CBT3253DS,112?

The CBT3253DS,112 supports 128 mA continuous current per switch channel, as specified in the Absolute Maximum Ratings table. This rating applies under recommended operating conditions (VCC = 4.5–5.5 V, Tamb = -40 °C to +85 °C) and assumes proper PCB thermal design with adequate copper pour for heat dissipation.

Can CBT3253DS,112 operate with control inputs above VCC?

Yes - the S0, S1, 1OE, and 2OE inputs are overvoltage tolerant up to 5.5 V regardless of VCC level, enabling safe interfacing with higher-voltage control signals (e.g., 5 V GPIO driving a 3.3 V system with level translator omission). This is explicitly guaranteed in the datasheet's Features section and Table 2.

Is CBT3253DS,112 pin-compatible with other CBT3253 package variants?

Yes - the CBT3253DS,112 (SSOP16/SOT519-1), CBT3253D (SO16/SOT109-1), and CBT3253PW (TSSOP16/SOT403-1) share identical pin numbering and electrical functionality. Mechanical footprint differs, but schematic symbol and netlist remain interchangeable across all three packages.

Does CBT3253DS,112 require external pull-up or pull-down resistors on unused control inputs?

Yes - per Section 8 of the datasheet, all unused control inputs (S0, S1, 1OE, 2OE) must be held at either VCC or GND to ensure predictable operation and prevent floating nodes from inducing unintended switching or increased supply current. Typical practice uses 10 kΩ pull-up to VCC or pull-down to GND.