Texas Instruments SN74CBTLV16292VR

Overview

SN74CBTLV16292VR from Texas Instruments is a 12-bit 1-of-2 high-speed FET multiplexer/demultiplexer with 4-Ω on-state resistance, rail-to-rail switching, and make-before-break operation. It supports partial-power-down via I_off, features internal 500-Ω pulldown resistors, and is used in high-speed data routing for memory expansion, bus isolation, and hot-swap interface applications.

For engineers reviewing the SN74CBTLV16292VR datasheet, SN74CBTLV16292VR pinout, SN74CBTLV16292VR application, or SN74CBTLV16292VR equivalent, key selection criteria include its 56-pin TVSOP (DGV) package, 2.3–3.6 V supply range, sub-nanosecond propagation delay (0.15 ns typical), I_off-enabled power-down isolation, and 128 mA continuous channel current capability.

Technical Context

This device implements a dual-port, 12-channel FET switch array with independent A/B1/B2 routing controlled by a single select (S) input. Each switch provides low-resistance bidirectional signal paths with rail-to-rail voltage handling and no DC blocking.

The architecture integrates make-before-break timing (≤2 ns) to prevent signal interruption during port switching, while I_off circuitry ensures <10 µA leakage when V_CC = 0 V and any I/O is biased between 0–3.6 V - enabling true partial-power-down operation without backflow current.

Key Specifications

Pinout & Package

SN74CBTLV16292VR is housed in a 56-pin Thin Very Small Outline Package (TVSOP, DGV), measuring 3.5 mm × 9.7 mm with 0.4 mm pitch and 1.2 mm maximum height. The package is RoHS-compliant, lead-finished with NiPdAu, and rated MSL Level-1 (260°C peak reflow).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar FET multiplexer/demultiplexer applications.

Compared with SN74CBTLV16292VR, SN74CBTLV3861RHLR offers compact packaging but reduced channel count and no RINT functionality, while SN74CBT16292DL provides identical logic but inferior thermal performance and larger PCB footprint - making SN74CBTLV16292VR optimal for high-density, thermally sensitive 12-bit routing with auxiliary path requirements.

Availability

SN74CBTLV16292VR is available at Aetrix Electronics and suitable for memory expansion interfaces, hot-swap backplane isolation, and PCI bus segmentation requiring stable component supply, long-term industrial lifecycle support, and RoHS-compliant TVSOP packaging.

Supply support for SN74CBTLV16292VR 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 logic and interface solutions.

The Widebus™ family - to which SN74CBTLV16292VR belongs - was engineered for ultra-low-latency, low-power signal routing in memory, bus, and test infrastructure applications demanding sub-nanosecond timing fidelity.

FAQ

What is the maximum operating frequency supported by the SN74CBTLV16292VR?

The SN74CBTLV16292VR does not specify a maximum clock frequency, but its 0.15 ns typical propagation delay (t_pd) and 4-Ω on-state resistance enable reliable operation with digital signals up to 5 GHz in small-signal conditions. Actual usable bandwidth depends on load capacitance and PCB layout; for 30 pF loads, the RC-limited bandwidth exceeds 3 GHz. The SN74CBTLV16292VR is designed for high-speed data routing rather than clock distribution.

Does the SN74CBTLV16292VR support level-shifting between different voltage domains?

No, the SN74CBTLV16292VR does not provide active level-shifting. It operates as a passive FET switch with rail-to-rail conduction, meaning signal swing is limited to 0 V to V_CC. Both sides of each switch must be biased within the same 2.3–3.6 V supply domain. For true level translation, a dedicated level shifter such as the TXB0108 must be used upstream or downstream of the SN74CBTLV16292VR.

How does the I_off feature protect the SN74CBTLV16292VR during partial power-down?

The I_off feature disables current flow through the FET channels when V_CC = 0 V, limiting leakage to ≤10 µA even if I/O pins are driven to 0–3.6 V. This prevents damaging back-current from powered subsystems into unpowered logic, enabling safe hot-swap and power-gating scenarios. The SN74CBTLV16292VR maintains isolation across all 12 channels simultaneously under these conditions.

Can unused B1 or B2 pins be left floating on the SN74CBTLV16292VR?

No - unused B1 or B2 pins must not be left floating. The SN74CBTLV16292VR integrates internal 500-Ω pulldown resistors on all B1/B2 terminals, which actively bias them to GND when not driven. This eliminates the need for external termination but requires that unconnected B1/B2 pins remain unpopulated or grounded via PCB trace - never pulled high or left open-circuit to avoid unintended current paths.

Is the SN74CBTLV16292VR pin-compatible with other members of the CBTLV family?

The SN74CBTLV16292VR shares functional pinout alignment with SN74CBTLV16292DL and SN74CBTLV16292GR (same 56-pin mapping for A/B1/B2/RINT/S/V_CC/GND), but mechanical compatibility requires matching package type: TVSOP (DGV) for SN74CBTLV16292VR, SSOP (DL) for DL variants, and TSSOP (DGG) for GR variants. PCB land patterns are not interchangeable due to differing body dimensions and pitch.