Texas Instruments SN74CBT16292DL

Overview

SN74CBT16292DL from Texas Instruments is a 12-bit 1-of-2 high-speed FET multiplexer/demultiplexer with internal 500-Ω pulldown resistors, TTL-compatible control inputs, 4-Ω on-state resistance, and make-before-break switching. It routes bidirectional signals between port A and either B1 or B2 under S-input control, supporting hot-swap and bus-isolation applications in telecom backplanes and industrial I/O modules.

For engineers reviewing the SN74CBT16292DL datasheet, SN74CBT16292DL pinout, SN74CBT16292DL application, or SN74CBT16292DL equivalent, key selection criteria include its 4-Ω r_on, 0.25 ns propagation delay at 5 V, –40°C to 85°C operating range, SSOP-56 package, and integrated pulldown resistors eliminating external biasing.

Technical Context

This device implements a dual-path 12-bit analog switch matrix using NMOS pass transistors with TTL-level S-input decoding. Its internal 500-Ω pulldown resistors on RINT outputs ensure defined logic states when unconnected, while the make-before-break timing (≤2 ns) prevents signal interruption during port switching.

The architecture supports bidirectional signal flow with minimal distortion: on-state resistance remains ≤7 Ω across 4–5.5 V supply and full temperature range, and channel leakage is limited to ±5 µA at V_CC = 5.5 V, enabling reliable operation in low-noise data acquisition and memory expansion paths.

Key Specifications

Pinout & Package

SN74CBT16292DL uses a 56-pin SSOP (Shrink Small-Outline Package) with 0.635 mm pitch, 13.9 mm × 7.9 mm body size, and 1.2 mm max height. Pin 1 is located in quadrant Q1 per JEDEC MO-194 standard.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBT16292DGGR, the SN74CBT16292DL provides superior thermal performance (θ_JA = 56°C/W vs. 64°C/W) and mechanical robustness in vibration-prone environments, while SN74CBT3245APW trades bit-width and integrated biasing for reduced footprint-making SN74CBT16292DL optimal for mission-critical 12-bit isolation where reliability outweighs size constraints.

Availability

SN74CBT16292DL is available at Aetrix Electronics and suitable for telecom backplane switching, industrial I/O module isolation, and memory expansion interfaces requiring stable component supply across extended product lifecycles.

Supply support for SN74CBT16292DL 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 90 years of innovation in industrial, automotive, and communications markets.

The SN74CBT16292DL belongs to TI's Widebus™ family of high-speed FET switches, designed specifically for low-distortion, bidirectional signal routing in 5-V digital systems requiring minimal propagation delay and guaranteed signal integrity.

FAQ

What is the maximum continuous current rating per channel for the SN74CBT16292DL?

The SN74CBT16292DL supports a continuous channel current of 128 mA per switch path. This rating is validated across the full operating temperature range (–40°C to 85°C) and ensures reliable conduction without thermal runaway or parameter drift, making SN74CBT16292DL suitable for driving moderate-load digital buses and sensor interface lines.

Does the SN74CBT16292DL require external pull-up or pull-down resistors on its B-port outputs?

No, the SN74CBT16292DL integrates internal 500-Ω pulldown resistors on the RINT node, which connects to the unused B-port bank during operation. This eliminates the need for external biasing components on B1 or B2 outputs, reducing BOM cost and PCB area while ensuring defined logic states during hot-swap events or idle conditions.

Can the SN74CBT16292DL operate with a 3.3-V supply voltage?

No, the SN74CBT16292DL has a minimum recommended V_CC of 4 V per its datasheet. Operating below 4 V risks violating VIH/VIL thresholds and degrading r_on performance. For 3.3-V systems, consider TI's SN74CBTD16210 or similar 3.3-V–optimized Widebus devices instead of SN74CBT16292DL.

How does the make-before-break feature of the SN74CBT16292DL improve system reliability?

With a maximum make-before-break time of 2 ns, the SN74CBT16292DL guarantees that the new signal path is established before the old one is broken. This prevents momentary open circuits on critical control lines such as resets or clocks, eliminating glitches that could cause microcontroller lockups or state machine corruption-directly enhancing reliability in telecom and industrial control systems using SN74CBT16292DL.

Is the SN74CBT16292DL RoHS compliant and lead-free?

Yes, the SN74CBT16292DL is RoHS compliant with lead-free NIPDAU (Nickel/Palladium/Gold) terminal finish and meets JEDEC MSL Level-1 moisture sensitivity requirements. Its packaging documentation confirms compliance with EU Directive 2011/65/EU, and the part marking "CBT16292" on the SSOP-56 body aligns with TI's standardized RoHS labeling for SN74CBT16292DL.