Nexperia USA Inc. CBT3253APW,112

Overview

CBT3253APW,112 from Nexperia is a dual 1-of-4 FET bus switch IC used for bidirectional signal routing in high-speed digital systems. It features two independent 4-channel multiplexer/demultiplexer paths, 5 Ω typical ON resistance at 5 V, <0.25 ns propagation delay, and operates from -40 °C to +85 °C with 4.5–5.5 V supply. It enables TTL-level compatible switching in memory address/data bus isolation and FPGA I/O expansion.

For engineers reviewing the CBT3253APW,112 datasheet, CBT3253APW,112 pinout, CBT3253APW,112 application, or CBT3253APW,112 equivalent, key selection criteria include dual-path 1-of-4 selectability, sub-1 Ω R_ON variation across channels, overvoltage-tolerant control inputs up to 5.5 V, and TSSOP16 package compatibility with high-density PCB layouts.

Technical Context

The CBT3253A implements two independent analog/digital bus switches using low-threshold NMOS FETs, each controlled by dedicated active-low output enable (1OE/2OE) and 2-bit binary select (S0/S1) inputs. Switching is fully bidirectional with no internal directionality - signal flow depends solely on external voltage potential across A and B terminals.

Each channel supports continuous 128 mA current per switch, with static leakage ≤±1 μA and input capacitance of 4.5 pF on control pins and 11.4 pF on A-port pins. The device uses latch-up protected silicon meeting JEDEC JESD78 Class II Level A (>100 mA), and ESD robustness per HBM >2000 V and CDM >1000 V.

Key Specifications

Pinout & Package

TSSOP16 package (SOT403-1): 16-pin thin shrink small outline, 4.4 mm body width, 0.65 mm lead pitch, exposed pad not present, RoHS-compliant plastic construction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBT3253CPWR and 74LVC2G53DP,125, the CBT3253APW,112 delivers superior 5 V performance with lowest R_ON, best ESD robustness, and native support for industrial temperature range - making it optimal for high-reliability 5 V bus switching where signal fidelity and thermal stability are critical.

Availability

CBT3253APW,112 is available at Aetrix Electronics and suitable for memory bus isolation, FPGA I/O expansion, and automated test equipment requiring stable component supply, long-term lifecycle assurance, and consistent TSSOP16 packaging.

Supply support for CBT3253APW,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 essential semiconductors including logic, discrete, and MOSFET devices.

The CBT3253A belongs to Nexperia's advanced bus switch product line, engineered specifically for low-latency, low-distortion signal routing in 5 V digital infrastructure - emphasizing robustness, minimal timing skew, and seamless integration into dense PCB layouts.

FAQ

What is the maximum allowable voltage on control inputs (S0, S1, 1OE, 2OE) when VCC = 4.5 V?

The control inputs are overvoltage tolerant up to 5.5 V regardless of VCC level. This allows interfacing with 5 V logic families even when the device operates at minimum 4.5 V supply, eliminating need for external level shifters in mixed-voltage systems.

Can CBT3253APW,112 be used to switch analog signals such as audio or sensor outputs?

Yes - its bidirectional, low-R_ON (5 Ω), low-C_off (3.8 pF), and flat R_ON vs. voltage profile support analog signals up to ~10 MHz. However, it is not specified for rail-to-rail analog swing; input voltage must remain within -0.5 V to VCC + 0.5 V per absolute maximum ratings.

Is there a thermal pad or exposed die attach pad on the TSSOP16 (SOT403-1) package?

No - the SOT403-1 package for CBT3253APW,112 has no exposed thermal pad. Thermal dissipation relies on copper traces connected to pins 8 (GND) and 16 (VCC); recommended layout includes ≥25 mm² copper pour tied to these pins for sustained 128 mA operation.

How does the device behave when both 1OE and 2OE are HIGH?

When either 1OE or 2OE is HIGH, its corresponding channel is fully disconnected - no conduction occurs between 1A/1Bn or 2A/2Bn. With both HIGH, both channels are open-circuited, presenting >1 GΩ isolation and <4 pF off-capacitance between all A and B terminals.