Texas Instruments SN74CBTLV3384DW

Overview

SN74CBTLV3384DW from Texas Instruments is a low-voltage 10-bit FET bus switch in SOIC-24 package, featuring 5-Ω typical on-state resistance, rail-to-rail switching across dual 5-bit channels, and Ioff partial-power-down support. It enables high-speed bidirectional data routing in memory expansion, processor interconnect, and hot-swap-capable backplane interfaces.

For engineers reviewing the SN74CBTLV3384DW datasheet, SN74CBTLV3384DW pinout, SN74CBTLV3384DW application, or SN74CBTLV3384DW equivalent, key selection criteria include guaranteed 2.3–3.6 V operation, sub-0.25 ns propagation delay at 3.3 V, Ioff leakage <10 µA during power-off, and SOIC-24 thermal resistance of 46°C/W - critical for dense logic interface designs requiring signal integrity and power sequencing robustness.

Technical Context

The SN74CBTLV3384DW implements two independent 5-bit FET-based analog switches controlled by separate OE inputs, enabling flexible configuration as either dual 5-bit or single 10-bit bus switches. Its CMOS-compatible control logic accepts VIH ≥2.0 V (at VCC = 3.6 V) and VIL ≤0.8 V, with rail-to-rail analog pass capability on all A/B I/O ports.

Each switch channel exhibits matched on-resistance (ron = 5–15 Ω depending on voltage/current), low off-capacitance (Cio(OFF) = 10 pF), and fast enable/disable timing (ten/tdis = 1–4.3 ns). The device meets JESD 17 latch-up immunity (>250 mA) and exceeds JESD 22 ESD ratings (2000-V HBM, 200-V MM).

Key Specifications

Pinout & Package

SN74CBTLV3384DW is housed in a 24-pin SOIC (DW) package measuring 15.4 mm × 7.5 mm × 2.35 mm, with standard 1.27 mm lead pitch and RoHS-compliant NiPdAu finish. The package supports manual soldering and reflow per JEDEC Level-1 profile.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBTLV3384DW, SN74CBT3384DW offers higher voltage tolerance but sacrifices Ioff safety and low-voltage compatibility, while SN74LVC1G3157DCKR provides lower capacitance and smaller footprint at the cost of channel count and independent bank control - making SN74CBTLV3384DW optimal for 10-bit synchronized bus isolation in mixed-supply industrial systems.

Availability

SN74CBTLV3384DW is available at Aetrix Electronics and suitable for memory expansion, processor bus isolation, and hot-swap backplane applications requiring stable component supply, long-term industrial lifecycle support, and RoHS-compliant sourcing.

Supply support for SN74CBTLV3384DW 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 solutions, with over 90 years of innovation in industrial, automotive, and communications markets.

The SN74CBTLV3384DW belongs to TI's CBTLV low-voltage bus switch family, engineered for high-speed, low-distortion signal routing in space-constrained, power-sensitive digital systems.

FAQ

What is the maximum data rate supported by the SN74CBTLV3384DW?

The SN74CBTLV3384DW achieves 0.15–0.25 ns propagation delay at 3.3 V, supporting clean signal transmission up to 1+ GHz in well-terminated point-to-point configurations. Real-world data rate depends on trace length, load capacitance, and driver strength - but the device reliably handles DDR2/DDR3 address/control buses and PCIe Gen1 sideband signals without added jitter.

Does the SN74CBTLV3384DW require external pull-up resistors on OE pins?

Yes - to ensure high-impedance state during power-up or power-down, OE pins must be tied to VCC through a pull-up resistor. TI specifies minimum resistance based on driver sink capability; a 10-kΩ resistor is commonly used and verified to maintain valid logic thresholds across −40°C to 85°C while minimizing quiescent current in the SN74CBTLV3384DW.

Can the SN74CBTLV3384DW be used with 1.8 V logic signals?

No - the SN74CBTLV3384DW requires VCC between 2.3 V and 3.6 V and does not support 1.8 V operation. Input thresholds scale with VCC (VIH ≥2.0 V at 3.6 V), so 1.8 V signals fall below guaranteed recognition levels. For 1.8 V systems, consider TI's SN74AVC series or level-shifting alternatives instead of the SN74CBTLV3384DW.

How does Ioff functionality protect the SN74CBTLV3384DW during partial power-down?

Ioff limits current flow to <10 µA when VCC = 0 V, regardless of voltage applied to A/B ports. This prevents back-driving powered circuitry through the SN74CBTLV3384DW's FET channels - a critical safeguard in modular systems where one board remains live while another is powered down or removed, avoiding latch-up or damage to upstream drivers.

Is the SN74CBTLV3384DW pin-compatible with other packages in the same family?

Yes - SN74CBTLV3384DW (SOIC-24), SN74CBTLV3384DWR (same SOIC-24 tape-and-reel), SN74CBTLV3384DBQR (SSOP-24), and SN74CBTLV3384DGVR (TVSOP-24) share identical pinout and electrical behavior. Mechanical differences affect thermal performance and PCB layout, but no schematic or firmware changes are needed when migrating between these SN74CBTLV3384DW-compatible variants.