Texas Instruments SN74CB3Q3384ADGVR

Overview

SN74CB3Q3384ADGVR from Texas Instruments is a 10-bit FET bus switch optimized for high-bandwidth, low-voltage (2.3 V to 3.6 V) applications. It features dual 5-bit sections with independent output-enable controls (1OE/2OE), 3 Ω typical ON-state resistance, <0.15 ns propagation delay, and 5-V tolerant I/Os supporting rail-to-rail 0–5 V signaling - enabling use in PCI interface isolation and memory interleaving systems.

For engineers reviewing the SN74CB3Q3384ADGVR datasheet, SN74CB3Q3384ADGVR pinout, SN74CB3Q3384ADGVR application, or SN74CB3Q3384ADGVR equivalent, key selection criteria include its 24-pin TVSOP package, partial-power-down Ioff support, 500 MHz bandwidth capability, and bidirectional zero-distortion signal gating for high-speed digital interconnects.

Technical Context

The SN74CB3Q3384ADGVR implements a charge-pump-enhanced FET architecture to maintain flat, low ON-state resistance (ron ≈ 3 Ω) across 0–5 V signal swing and full VCC range (2.3–3.6 V). Its dual 5-bit structure allows independent enable control per section, supporting flexible bus segmentation or combined 10-bit operation.

It delivers bidirectional, near-zero-propagation-delay switching with 4 pF typical OFF-state I/O capacitance and supports hot-swap and partial-power-down modes via Ioff circuitry that blocks backflow when VCC = 0 V - critical for system-level power sequencing integrity in multi-rail embedded platforms.

Key Specifications

Pinout & Package

SN74CB3Q3384ADGVR is housed in a 24-pin Thin Very Small Outline Package (TVSOP, DGV), 4.4 mm × 6.6 mm footprint, 1.2 mm max height, with 0.4 mm lead pitch and moisture sensitivity level 1 (260°C reflow unlimited).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CB3Q3384ADGVR, SN74CBT3384CPW offers lower cost but sacrifices 5-V tolerance and power-down safety; PI3CHD3245LEX extends voltage range and ESD rating but lacks published bandwidth characterization - making SN74CB3Q3384ADGVR optimal for bandwidth-critical, mixed-voltage, hot-swap-sensitive designs.

Availability

SN74CB3Q3384ADGVR is available at Aetrix Electronics and suitable for PCI interface isolation, memory interleaving, and low-distortion signal gating requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for industrial and communications equipment.

Supply support for SN74CB3Q3384ADGVR 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 decades of expertise in high-speed interface solutions.

The SN74CB3Q3384ADGVR belongs to TI's CB3Q family of high-bandwidth FET bus switches, engineered specifically for broadband communications, networking infrastructure, and data-intensive computing where signal integrity, low latency, and mixed-voltage interoperability are essential.

FAQ

What is the maximum signal frequency supported by SN74CB3Q3384ADGVR?

The SN74CB3Q3384ADGVR is characterized for high-bandwidth operation up to 500 MHz, as confirmed in TI's application report SCDA008. This performance is enabled by its low 3 Ω ON-state resistance and 4 pF OFF-state I/O capacitance, which jointly minimize RC time constants and preserve signal rise/fall times. The device maintains this capability across its full 2.3–3.6 V VCC range and 0–5 V signal swing.

Does SN74CB3Q3384ADGVR support hot-swap or partial-power-down operation?

Yes, SN74CB3Q3384ADGVR includes dedicated Ioff circuitry that limits reverse current to 1 µA maximum when VCC = 0 V, enabling safe insertion and removal in live systems. This feature is explicitly validated per JESD 78 Class II latch-up standards and allows the device to isolate powered and unpowered domains without damaging backflow - a core requirement for hot-swap backplane and modular server applications.

Can SN74CB3Q3384ADGVR interface between 3.3-V and 5-V logic domains?

Yes, SN74CB3Q3384ADGVR supports 0–5.5 V signaling on all I/O pins regardless of VCC (2.3–3.6 V), making it fully 5-V tolerant. When VCC = 3.3 V, it reliably passes 0–5 V signals bidirectionally with rail-to-rail switching and <0.15 ns propagation delay - eliminating need for external level translators in mixed-voltage interfaces such as FPGA-to-legacy-peripheral connections.

What is the recommended power-up sequence for SN74CB3Q3384ADGVR?

To ensure high-impedance state at power-up, OE pins (1OE and 2OE) must be held high via pull-up resistors to VCC; TI specifies minimum resistor value based on driver sink capability. VCC should be applied before or concurrently with control/data signals. No strict sequencing between VCC and GND is required, but grounding must be established prior to VCC application per standard PCB design practice.

Is SN74CB3Q3384ADGVR pin-compatible with other packages in the same family?

SN74CB3Q3384ADGVR (TVSOP-24) shares identical pinout and functionality with SN74CB3Q3384ADBQR (SSOP-24) and SN74CB3Q3384APWR (TSSOP-24), as confirmed by TI's package drawings and logic diagrams. All three variants use the same 24-pin arrangement, signal mapping, and electrical specifications - allowing direct PCB footprint substitution where thermal or board-space constraints permit.