Texas Instruments SN74CBTS16211DGVR

Overview

SN74CBTS16211DGVR from Texas Instruments is a 24-bit FET bus switch with Schottky diode clamping, designed for high-speed TTL-compatible signal routing in memory and data-path applications. It features 5-Ω on-state resistance, 0.25 ns propagation delay at 5 V, dual 12-bit or single 24-bit configurable operation, and operates from –40°C to 85°C in a 56-pin TVSOP package.

For engineers reviewing the SN74CBTS16211DGVR datasheet, SN74CBTS16211DGVR pinout, SN74CBTS16211DGVR application, or SN74CBTS16211DGVR equivalent, this page delivers verified electrical specs, real-world switching behavior, thermal performance (θ_JA = 48°C/W), I/O voltage tolerance (–0.5 V to 7 V), and precise pin-function mapping for reliable PCB integration and signal integrity validation.

Technical Context

The SN74CBTS16211DGVR implements two independent 12-bit FET-based analog switches controlled by separate OE inputs (1OE and 2OE), enabling selective connection of A-port to B-port with minimal RC delay. Its low on-resistance (5–7 Ω) and integrated Schottky clamps suppress undershoot transients on bidirectional data lines.

Each switch channel supports TTL-compatible logic levels (V_IL ≤ 0.8 V, V_VIH ≥ 2 V) and operates across 4 V to 5.5 V supply range. The device exhibits 3 µA typical ICC quiescent current and 5.5 pF off-state capacitance, ensuring low loading on driven buses during disable states.

Key Specifications

Pinout & Package

SN74CBTS16211DGVR uses a 56-pin Thin Very Small Outline Package (TVSOP, DGV), 7.9 mm × 4.4 mm footprint, 1.2 mm max height, JEDEC MO-194 compliant, with exposed pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBT16211DGVR, the SN74CBTS16211DGVR adds robust undershoot protection without sacrificing speed or pin compatibility; versus SN74LVC16244ADGVR, it provides true bidirectional switching with lower propagation delay and no direction-control overhead.

Availability

SN74CBTS16211DGVR is available at Aetrix Electronics and suitable for memory bus isolation, hot-swap backplane interfaces, test access multiplexing, and legacy system bus expansion requiring stable component supply and industrial temperature support.

Supply support for SN74CBTS16211DGVR 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 delivering analog, embedded processing, and connectivity solutions with deep expertise in high-speed interface design and industrial-grade reliability.

The SN74CBTS16211DGVR belongs to TI's Widebus™ family of high-speed bus switches, engineered specifically for low-latency, bidirectional signal routing in memory subsystems, test equipment, and modular computing architectures.

FAQ

What is the maximum continuous current rating per channel for the SN74CBTS16211DGVR?

The SN74CBTS16211DGVR supports a continuous channel current of 128 mA per switch path, validated across its full operating temperature range (–40°C to 85°C). This rating ensures reliable conduction without thermal runaway when used within recommended V_CC (4–5.5 V) and ambient conditions. Exceeding this current may trigger thermal shutdown or degrade long-term reliability. The SN74CBTS16211DGVR datasheet specifies this value under absolute maximum ratings and confirms it applies uniformly to all 24 channels.

Does the SN74CBTS16211DGVR require external pull-up or pull-down resistors on its OE inputs?

No, the SN74CBTS16211DGVR does not require external pull-up or pull-down resistors on 1OE or 2OE inputs. Its control inputs are TTL-compatible with defined V_IL ≤ 0.8 V and V_VIH ≥ 2 V thresholds, and TI recommends tying unused OE inputs directly to V_CC or GND to prevent floating states. The SN74CBTS16211DGVR internal structure ensures stable logic interpretation without external biasing, simplifying PCB layout and reducing BOM count.

Can the SN74CBTS16211DGVR operate with a 3.3-V supply?

No, the SN74CBTS16211DGVR is not rated for 3.3-V operation. Its recommended V_CC range is strictly 4 V to 5.5 V, and the absolute minimum supply voltage is 4 V per the datasheet's recommended operating conditions. Operating below 4 V risks undefined switching behavior, increased r_on, and failure to meet timing specs such as 0.25 ns t_pd. For 3.3-V systems, consider TI's LVC-family alternatives-not the SN74CBTS16211DGVR.

How does the Schottky clamping in the SN74CBTS16211DGVR improve system robustness?

The Schottky clamping diodes in the SN74CBTS16211DGVR limit negative input undershoot to –1.2 V (at –18 mA), preventing damage to downstream receivers and reducing false triggering caused by transmission-line reflections. This eliminates the need for discrete external clamps in high-speed bus designs, directly improving signal fidelity on long or unterminated traces. The SN74CBTS16211DGVR integrates this protection across all 24 I/O pins without adding capacitance or delay.

Is the SN74CBTS16211DGVR pin-compatible with other packages in the same family?

Yes, the SN74CBTS16211DGVR shares identical pinout and functionality with SN74CBTS16211DL (SSOP) and SN74CBTS16211DGGR (TSSOP), differing only in package dimensions and thermal metrics (θ_JA = 48°C/W for DGV vs. 64°C/W for DGG). All three variants use the same 56-pin arrangement, enabling direct PCB footprint substitution where board space and thermal constraints allow. The SN74CBTS16211DGVR maintains full electrical and logical equivalence across these package options.