Texas Instruments SN74CBTLV3384PW

Overview

SN74CBTLV3384PW from Texas Instruments is a low-voltage 10-bit FET bus switch in TSSOP-24 package, featuring 5-Ω on-state resistance, rail-to-rail switching, and I_off partial-power-down support. It operates from 2.3 V to 3.6 V and delivers sub-nanosecond propagation delay (0.15 ns typ at 2.5 V), enabling high-speed data path isolation in DDR memory interfaces and PCIe signal routing.

For engineers reviewing the SN74CBTLV3384PW datasheet, SN74CBTLV3384PW pinout, SN74CBTLV3384PW application, or SN74CBTLV3384PW equivalent, key selection criteria include verified 5-Ω r_on, dual 5-bit independent enable control, I_off leakage <10 µA at V_CC = 0 V, ESD robustness (2000-V HBM), and TSSOP-24 thermal performance (θ_JA = 88°C/W).

Technical Context

The SN74CBTLV3384PW implements two independent 5-bit FET-based analog switches with separate OE inputs, allowing flexible configuration as either two 5-bit or one 10-bit bus switch. Its CMOS-compatible control logic supports V_IH = 2.0 V min at V_CC = 3.6 V and V_IL = 0.8 V max, ensuring reliable interfacing with 2.5-V and 3.3-V logic families.

Rail-to-rail analog switching enables bidirectional signal pass-through across A/B ports without level translation. The I_off circuitry actively blocks current backflow when V_CC = 0 V, maintaining isolation between powered and unpowered system domains - critical for hot-swap and partial-power-down architectures.

Key Specifications

Pinout & Package

TSSOP-24 package (PW), 7.9 mm × 4.5 mm × 1.2 mm max height, 0.65-mm lead pitch, RoHS-compliant NIPDAU finish, MSL Level-1 (unlimited reflow).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBTLV3384PW, SN74CBT3384PW trades I_off safety for higher voltage tolerance, while 74LVC1G3157GW sacrifices integration density and timing performance for minimal footprint - neither offers drop-in replacement capability due to pin count, enable architecture, or power-domain compatibility differences.

Availability

SN74CBTLV3384PW is available at Aetrix Electronics and suitable for DDR2 memory isolation, PCIe sideband routing, and FPGA configuration bus switching requiring stable component supply, long-term industrial temperature support, and guaranteed I_off-enabled power sequencing.

Supply support for SN74CBTLV3384PW 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 connectivity technologies, with over 50 years of innovation in high-reliability interface solutions.

The SN74CBTLV3384PW belongs to TI's CBTLV low-voltage bus switch family, engineered specifically for high-speed digital system interconnects requiring minimal propagation delay, rail-to-rail signal fidelity, and robust partial-power-down behavior.

FAQ

What is the maximum continuous current rating per channel for the SN74CBTLV3384PW?

The SN74CBTLV3384PW supports a continuous channel current of 128 mA per switch path, validated under recommended operating conditions (V_CC = 2.3 V to 3.6 V, T_A = −40°C to +85°C). This rating assumes proper PCB thermal design using the TSSOP-24 package's 88°C/W junction-to-ambient thermal resistance and adequate copper pour area.

Does the SN74CBTLV3384PW require external pull-up resistors on its OE pins?

Yes - to ensure high-impedance state during power-up or power-down, OE pins of the SN74CBTLV3384PW must be tied to V_CC via external pull-up resistors. The minimum resistor value depends on the driving circuit's current-sinking capability; TI recommends verifying against the device's I_OL specification (64 mA max) to avoid excessive loading.

Can the SN74CBTLV3384PW operate with a 2.5-V supply and interface with 3.3-V logic signals?

Yes - the SN74CBTLV3384PW supports rail-to-rail switching and accepts input voltages from 0 V to V_CC. At V_CC = 2.5 V, it safely passes 3.3-V signals on A/B ports because its absolute maximum input voltage is 4.6 V, and its I/O structure is designed for overvoltage-tolerant analog pass-through without damage or latch-up.

How does the I_off feature of the SN74CBTLV3384PW protect system-level power domains?

The I_off feature of the SN74CBTLV3384PW limits leakage current to <10 µA when V_CC = 0 V and any I/O terminal is biased between 0 V and 3.6 V. This prevents back-current flow from powered subsystems into unpowered ones - a critical safeguard in multi-rail systems like server motherboards where CPU, memory, and I/O rails power up/down asynchronously.

What is the typical on-state resistance (r_on) of the SN74CBTLV3384PW and how does it vary with supply voltage?

The SN74CBTLV3384PW has a typical on-state resistance of 5 Ω at V_CC = 2.5 V and 24 mA test current, and 5 Ω at V_CC = 3.3 V under identical conditions. This flat r_on profile across the 2.3–3.6 V range ensures consistent signal attenuation and timing behavior regardless of supply tolerance or droop, simplifying high-speed timing margin analysis.