Texas Instruments SN74CBTLV3383DWE4

Overview

SN74CBTLV3383DWE4 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 I_off partial-power-down protection. It functions as either a 10-bit bus switch or a 5-bit bidirectional 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 SN74CBTLV3383DWE4 datasheet, SN74CBTLV3383DWE4 pinout, SN74CBTLV3383DWE4 application, or SN74CBTLV3383DWE4 equivalent, this device supports sub-0.25 ns propagation delay at 3.3 V, ±128 mA channel current, and operates across –40°C to +85°C with ESD robustness per JESD22 (±2000-V HBM).

Technical Context

The SN74CBTLV3383DWE4 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 and BX is low, A1–A5 connect to B1–B5 respectively; when BX is high, A1–A5 swap to B2–B1, A2–A5 to B1–B4 - enabling 5-bit signal pair inversion without external routing.

Its I_off specification limits leakage to ≤10 µA when V_CC = 0 V and I/O pins are biased 0–3.6 V, ensuring isolation during power sequencing. The device supports overvoltage-tolerant I/O up to 4.6 V independent of V_CC, and exhibits <13.5 pF input-to-output capacitance in OFF state for minimal crosstalk in dense PCB layouts.

Key Specifications

Pinout & Package

SN74CBTLV3383DWE4 is packaged in a 24-pin SOIC (DW) with 15.4 mm × 7.50 mm body size, 1.27 mm pitch, and RoHS-compliant NiPdAu lead finish. 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 SN74CBTLV3383DWE4, SN74CBT3383CDW lacks I_off and rail-to-rail capability, limiting use in modern low-voltage systems; PI3CH400QE offers superior signal integrity for clocks but cannot replicate the 10-bit bidirectional exchange functionality essential for memory and interconnect applications.

Availability

SN74CBTLV3383DWE4 is available at Aetrix Electronics and suitable for rack server backplanes, telecom line cards, and gaming console interconnects requiring stable component supply, long-term lifecycle support, and traceable sourcing for industrial OEM programs.

Supply support for SN74CBTLV3383DWE4 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 leader specializing in analog, embedded processing, and logic solutions, with decades of expertise in high-speed interface ICs and industrial-grade reliability.

The SN74CBTLV3383DWE4 belongs to TI's CBTLV low-voltage bus-switch family, designed specifically for high-bandwidth, low-latency signal routing in next-generation computing and communications infrastructure.

FAQ

What is the maximum continuous current per channel for SN74CBTLV3383DWE4?

The SN74CBTLV3383DWE4 supports a maximum continuous channel current of ±128 mA, as specified in its Absolute Maximum Ratings table. This rating applies under recommended operating conditions (V_CC = 2.3 V to 3.6 V, T_A = –40°C to +85°C) and ensures reliable conduction without thermal derating in standard SOIC-DW packaging. Exceeding this limit risks permanent damage.

Does SN74CBTLV3383DWE4 support true bidirectional signal flow?

Yes, SN74CBTLV3383DWE4 provides symmetrical bidirectional operation: each FET switch conducts equally well from A to B or B to A, with matched on-state resistance (<8 Ω typical) and propagation delay (<0.25 ns) in both directions. This enables seamless integration in systems where signal direction changes dynamically, such as memory arbitration or protocol bridging.

How does the I_off feature function in SN74CBTLV3383DWE4?

The I_off feature in SN74CBTLV3383DWE4 disables current flow between I/O terminals when V_CC = 0 V, limiting leakage to ≤10 µA even if pins are biased from 0 V to 3.6 V. This prevents backfeed into unpowered domains during hot-swap events or partial power-down, making SN74CBTLV3383DWE4 suitable for PCIe, server backplane, and modular system designs requiring robust power sequencing.

Can SN74CBTLV3383DWE4 operate with signals exceeding its V_CC supply voltage?

Yes, SN74CBTLV3383DWE4 supports overvoltage-tolerant I/O up to 4.6 V regardless of V_CC level (2.3 V–3.6 V), as confirmed in its Absolute Maximum Ratings. This allows safe interfacing with higher-voltage peripherals or legacy 5-V logic without external clamping, provided V_CC remains within spec and I_off is not engaged.

What package type is used for SN74CBTLV3383DWE4?

SN74CBTLV3383DWE4 uses the SOIC (DW) package: a 24-pin surface-mount outline measuring 15.4 mm × 7.50 mm with 1.27 mm pitch, RoHS-compliant NiPdAu lead finish, and moisture sensitivity level (MSL) 1 (unlimited floor life at ≤30°C/60% RH). It ships in tubes of 25 units and is compatible with standard reflow profiles up to 260°C peak.