Nexperia USA Inc. CBT3245APW,112

Overview

CBT3245APW,112 from Nexperia is a 8-bit bus switch with 3-state outputs, designed for high-speed data path control in digital systems. It features 1.65 V to 3.6 V supply voltage, 4.5 ns propagation delay at 3.3 V, and supports hot insertion. Used in PCIe add-in card interface buffering and FPGA I/O expansion.

For engineers reviewing the CBT3245APW,112 datasheet, CBT3245APW,112 pinout, CBT3245APW,112 application, or CBT3245APW,112 equivalent, key selection factors include its bidirectional switching capability, low on-resistance (5 Ω typical), rail-to-rail signal pass-through, and TSSOP-20 package compatibility with high-density PCB layouts.

Technical Context

This device implements eight independent single-pole double-throw (SPDT) analog switches controlled by a single enable input (OE). Each switch channel passes signals without level translation between 1.65 V and 3.6 V logic domains.

It operates with no DC path between ports when disabled, exhibits <1 µA off-state leakage at 25 °C, and maintains <0.5 ns skew across all channels under matched load conditions.

Key Specifications

Pinout & Package

TSSOP-20 package: 6.5 mm × 4.4 mm body, 0.65 mm pitch, thermally enhanced exposed pad (not electrically connected).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bus switching applications.

Compared with SN74CBTD3384PWR and 74LVC245APW,118, CBT3245APW,112 uniquely supports true bidirectional, level-agnostic switching with verified hot-insertion behavior-critical for reconfigurable I/O and modular backplane designs requiring zero-bus-contention operation.

Availability

CBT3245APW,112 is available at Aetrix Electronics and suitable for FPGA I/O expansion, PCIe add-in card interface, and industrial PLC backplane applications requiring stable component supply and long-term lifecycle support.

Supply support for CBT3245APW,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 standard logic, discrete, and MOSFET solutions for automotive, industrial, and computing markets.

The CBT3245APW,112 belongs to Nexperia's advanced bus switch product line, engineered specifically for high-speed, low-distortion signal routing in mixed-voltage digital systems with stringent hot-swap and timing requirements.

FAQ

What is the maximum data rate supported by CBT3245APW,112?

The CBT3245APW,112 supports data rates up to 100 MHz in parallel bus configurations, based on its 4.5 ns propagation delay and <0.5 ns channel skew. This enables reliable operation in DDR2 SDRAM address/control buses and FPGA configuration interfaces without added timing margin.

Can CBT3245APW,112 operate with 1.8 V and 3.3 V signals on opposite sides simultaneously?

Yes. The device is fully bidirectional and voltage-agnostic: a 1.8 V signal applied to the A-side will appear unaltered on the B-side even when V_CC = 3.3 V, and vice versa. No level translation circuitry is required.

Is the exposed pad on the TSSOP-20 package electrically connected?

No. The exposed pad on CBT3245APW,112's TSSOP-20 package is a thermal pad only, not electrically connected to any internal node. It must be soldered to a copper pour for thermal dissipation but left floating electrically.

Does CBT3245APW,112 require external pull-up or pull-down resistors on its I/O pins?

No. The device has no internal termination; external resistors are optional and application-dependent. They are commonly used on the B-side for open-drain bus arbitration or to define default states during OE deassertion, but not required for basic switching operation.