Texas Instruments SN74CBTLV3383DWR

Overview

SN74CBTLV3383DWR from Texas Instruments is a low-voltage 10-bit FET bus-exchange switch operating from 2.3 V to 3.6 V, featuring 5 Ω typical on-state resistance, rail-to-rail signal switching, and Ioff partial-power-down support. It functions as either a 10-bit bus switch or a 5-bit bus exchanger (A/B pair swapping), enabling dynamic signal path reconfiguration in high-speed digital interconnects for rack servers and communication boards.

For engineers reviewing the SN74CBTLV3383DWR datasheet, SN74CBTLV3383DWR pinout, SN74CBTLV3383DWR application, or SN74CBTLV3383DWR equivalent, key selection criteria include its 0.15 ns propagation delay at 2.5 V, ±128 mA continuous channel current rating, bidirectional I/O capability, and SOIC-24 package compatibility with industrial temperature range (–40°C to +85°C) operation.

Technical Context

The SN74CBTLV3383DWR implements ten independent FET-based bilateral switches controlled by two logic inputs: BE (active-low enable) and BX (bus-exchange select). When BE is low, the device enables signal flow; BX then determines whether A1–A5 connect to B1–B5 (BX = L) or to B2–B1/B1–B5 swapped (BX = H), supporting both transparent and crossbar routing modes.

Its architecture supports rail-to-rail analog/digital signal handling across the full supply range (0 V to VCC), with Ioff protection limiting backflow current to ≤10 µA when VCC = 0 V and I/O pins are biased up to 3.6 V - critical for hot-swap and multi-rail system isolation during power sequencing.

Key Specifications

Pinout & Package

SN74CBTLV3383DWR uses a 24-pin SOIC (DW) package measuring 15.4 mm × 7.50 mm, with standard 1.27 mm pitch and gull-wing leads. Pin 1 is located at the top-left corner adjacent to the index notch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBTLV3384DWR and PI3CH480ELEX, the SN74CBTLV3383DWR uniquely combines bus-exchange capability, Ioff protection, and sub-0.3 ns propagation delay in a standard SOIC-24 footprint - making it optimal for reconfigurable high-speed interconnects requiring both flexibility and safety.

Availability

SN74CBTLV3383DWR is available at Aetrix Electronics and suitable for rack server backplanes, communication board signal multiplexing, and industrial PLC I/O modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SN74CBTLV3383DWR 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

Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets.

The SN74CBTLV3383DWR belongs to TI's CBTLV (CrossBar Transistor Logic Very-Low-Voltage) family, engineered specifically for high-speed, low-latency signal routing in space-constrained, multi-rail digital systems where power sequencing and signal integrity are critical.

FAQ

What is the maximum operating frequency supported by the SN74CBTLV3383DWR?

The SN74CBTLV3383DWR is characterized and tested up to 200 MHz, with propagation delay as low as 0.15 ns at 2.5 V supply. This frequency rating reflects validated performance under specified load conditions (e.g., 50 pF capacitance), ensuring reliable operation in DDR, PCIe Gen1, and parallel memory interfaces without signal degradation. The SN74CBTLV3383DWR achieves this via its 5 Ω typical on-resistance and optimized FET gate drive.

Does the SN74CBTLV3383DWR support hot-swap or partial-power-down operation?

Yes, the SN74CBTLV3383DWR fully supports partial-power-down via its Ioff feature: when VCC = 0 V, leakage current remains ≤10 µA even if I/O pins are biased up to 3.6 V. This prevents damaging back-current during hot-insertion or staggered power sequencing. The SN74CBTLV3383DWR maintains high-impedance isolation in this state, making it suitable for modular rack systems and field-replaceable units.

How does the bus-exchange function work on the SN74CBTLV3383DWR?

The SN74CBTLV3383DWR implements bus exchange using two control inputs: BE (active-low enable) and BX (exchange select). When BE is low, BX = L routes A1–A5 to B1–B5 directly; BX = H swaps pairs so A1 connects to B2, A2 to B1, etc. This 5-bit crossbar behavior is implemented in hardware with no latency penalty. The SN74CBTLV3383DWR's pinout and truth table confirm deterministic, glitch-free switching between modes.

What package type and dimensions does the SN74CBTLV3383DWR use?

The SN74CBTLV3383DWR is packaged in a 24-pin SOIC (DW) body measuring 15.4 mm × 7.50 mm with 1.27 mm lead pitch. It complies with JEDEC MS-013 and is RoHS-compliant with NiPdAu lead finish. The SN74CBTLV3383DWR's land pattern requires 10.75 mm × 15.7 mm pad layout (A0/B0), and it ships in tape-and-reel format (2000 units/reel) with MSL Level-1 rating for unlimited floor life.

Can the SN74CBTLV3383DWR handle analog signals, or is it digital-only?

The SN74CBTLV3383DWR supports both analog and digital signals due to its FET-based bilateral switch architecture and rail-to-rail operation (0 V to VCC). Each channel exhibits matched on-resistance and low charge injection (<10 pC), enabling clean analog switching for audio, sensor, or reference voltage routing. The SN74CBTLV3383DWR's bidirectional symmetry and flat r(on) vs. voltage curve ensure minimal THD and signal distortion across its full operating range.