Texas Instruments SN74CBTLVR16292VR

Overview

SN74CBTLVR16292VR from Texas Instruments is a 12-bit 1-of-2 high-speed FET multiplexer/demultiplexer with rail-to-rail switching, 25-Ω on-chip series resistors on all I/O ports, and make-before-break operation. It supports partial-power-down mode via Ioff (≤10 µA at VCC = 0), features internal 500-Ω pulldown resistors, and delivers ≤0.25 ns propagation delay (tpd) at 3.3 V for low-jitter signal routing in high-speed digital interconnects.

For engineers reviewing the SN74CBTLVR16292VR datasheet, SN74CBTLVR16292VR pinout, SN74CBTLVR16292VR application, or SN74CBTLVR16292VR equivalent, key selection criteria include its 56-pin TVSOP (DGV) package, 2.3–3.6 V supply range, 30–47 Ω typical on-state resistance (ron), −40°C to 85°C operating temperature, and compatibility with hot-swap and power-gated systems requiring Ioff isolation.

Technical Context

This device implements dual 12-bit bidirectional analog/digital switches controlled by a single select (S) input: when S is low, A-port connects to B1-port and RINT connects to B2-port; when S is high, A-port connects to B2-port and RINT connects to B1-port. Each switch path uses low-threshold FETs enabling rail-to-rail signal pass-through without level translation.

The architecture integrates 25-Ω series resistors per I/O terminal to suppress overshoot/undershoot, eliminates need for external termination, and ensures latch-up immunity (>250 mA per JESD 17). Its Ioff circuitry blocks current backflow during partial power-down, providing true isolation when VCC = 0 while I/O pins tolerate 0–3.6 V.

Key Specifications

Pinout & Package

SN74CBTLVR16292VR is housed in a 56-pin Thin Very Small Outline Package (TVSOP, DGV), measuring 11.4 mm × 4.4 mm × 1.2 mm (JEDEC MO-194 compliant), with 0.4 mm lead pitch and exposed pad not present. The package supports fine-pitch PCB layout and automated optical inspection.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed bidirectional multiplexer applications.

Compared with SN74CBTLVR16292VR, the DGG-packaged SN74CBT16292DGGR offers identical electrical performance but requires thermal derating above 65°C ambient, while the SN74CBTLV3245PWR sacrifices routing flexibility and MBB safety for higher density and lower ron in simpler 8-bit applications.

Availability

SN74CBTLVR16292VR is available at Aetrix Electronics and suitable for high-speed memory interconnects, PCIe sideband routing, hot-swappable backplane interfaces, and automated test equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for SN74CBTLVR16292VR 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 SN74CBTLVR16292VR belongs to TI's Widebus™ family of advanced bus switches, designed specifically for low-latency, rail-to-rail signal routing in memory subsystems, communications infrastructure, and test instrumentation where signal fidelity and power sequencing robustness are critical.

FAQ

What is the maximum continuous current rating per channel for SN74CBTLVR16292VR?

The SN74CBTLVR16292VR supports a continuous channel current of 128 mA per switch path, as specified in its absolute maximum ratings. This rating applies under recommended operating conditions (VCC = 2.3–3.6 V, TA = −40°C to 85°C) and assumes proper PCB thermal design. Exceeding this current may degrade ron stability or trigger thermal shutdown in sustained operation.

Does SN74CBTLVR16292VR require external termination resistors?

No, SN74CBTLVR16292VR does not require external termination resistors. Each I/O port integrates an equivalent 25-Ω series resistor to dampen reflections and suppress overshoot/undershoot. This built-in termination eliminates the need for discrete resistors on A, B1, and B2 ports, simplifying layout and reducing BOM cost in high-speed parallel bus applications.

How does the Ioff feature of SN74CBTLVR16292VR protect the system during partial power-down?

The Ioff feature of SN74CBTLVR16292VR limits current flow to ≤10 µA when VCC = 0 V, preventing damaging back-current from live I/O traces into a powered-down section. This isolation ensures safe hot-swap operation and enables independent power domain sequencing in complex systems - a capability confirmed in the device's electrical characteristics table and functional description.

What is the significance of the RINT pin on SN74CBTLVR16292VR?

The RINT pin on SN74CBTLVR16292VR is a dedicated reference terminal switched inversely to the A-port: when A connects to B1, RINT connects to B2, and vice versa. It is intended for impedance matching, bias voltage injection, or reference signal routing in differential or calibrated analog-digital hybrid paths - a unique capability not found in standard bus switches.

Is SN74CBTLVR16292VR compatible with 2.5 V and 3.3 V logic families simultaneously?

Yes, SN74CBTLVR16292VR operates across a 2.3–3.6 V supply range and supports rail-to-rail switching, allowing it to interface transparently between 2.5 V and 3.3 V logic domains. Its VIH/VIL thresholds scale with VCC, and its 25-Ω series resistors ensure consistent signal damping regardless of voltage level - verified in the recommended operating conditions and electrical characteristics tables.