Texas Instruments SN74CBT16210CDGGR

Overview

SN74CBT16210CDGGR from Texas Instruments is a 20-bit FET bus switch IC organized as two independent 10-bit bidirectional switches, featuring 3 Ω typical ON-state resistance, <0.24 ns propagation delay at 4 V, and −2 V undershoot protection on A/B ports. It operates from 4 V to 5.5 V and supports mixed-voltage signaling (0.8 V to 5 V) for PCI interface and memory interleaving applications.

For engineers reviewing the SN74CBT16210CDGGR datasheet, SN74CBT16210CDGGR pinout, SN74CBT16210CDGGR application, or SN74CBT16210CDGGR equivalent, key selection criteria include Ioff-enabled partial-power-down capability, 5.5 pF OFF-state I/O capacitance, TTL/CMOS-compatible control inputs, and TSSOP-48 package compatibility with high-density PCB layouts.

Technical Context

The SN74CBT16210CDGGR implements dual 10-bit FET-based analog/digital bus switches with separate 1OE and 2OE enable controls. Each switch channel provides near-zero propagation delay via low-impedance MOSFET paths and integrated undershoot-protection circuitry that actively clamps A/B port voltages down to −2 V while maintaining OFF-state isolation.

It supports full 0–5.5 V data I/O signaling across all logic families, features Ioff current limiting (<10 µA at VCC = 0 V), and maintains high-impedance isolation during power sequencing when OE is pulled up to VCC. The device meets JESD 78 Class II latch-up immunity (>100 mA) and JESD 22 ESD ratings (2000-V HBM, 1000-V CDM).

Key Specifications

Pinout & Package

TSSOP-48 package (DGG), 12.6 mm × 6.2 mm × 1.2 mm body, 0.5 mm pitch, moisture sensitivity level 1 (260°C peak reflow), RoHS-compliant NiPdAu lead finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBTD16210DGGR and SN74LVC16244ADGGR, the SN74CBT16210CDGGR uniquely delivers bidirectional, low-ron, mixed-voltage switching without bus-hold artifacts or unidirectional constraints-making it irreplaceable for PCI isolation, memory interleaving, and analog gating where signal integrity and voltage agility are critical.

Availability

SN74CBT16210CDGGR is available at Aetrix Electronics and suitable for PCI interface design, memory interleaving systems, and low-distortion analog signal gating requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for SN74CBT16210CDGGR 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 over 90 years of innovation in high-reliability, high-performance components.

The SN74CBT16210CDGGR belongs to TI's Widebus™ family of high-speed FET bus switches, engineered specifically for low-latency, low-distortion bidirectional signal routing in computing, communications, and industrial control infrastructure.

FAQ

What is the maximum undershoot voltage the SN74CBT16210CDGGR can tolerate on its A and B ports?

The SN74CBT16210CDGGR tolerates up to −2 V undershoot on both A and B ports, enforced by integrated active undershoot-protection circuitry that senses negative excursions and maintains OFF-state integrity. This specification is verified per test conditions in the SCDS115C datasheet, with VCC = 5.5 V and switch OFF. The protection operates independently of VCC level within the 4–5.5 V operating range, making SN74CBT16210CDGGR suitable for hot-swap and noisy industrial environments where transient negative spikes occur.

Does the SN74CBT16210CDGGR support partial-power-down operation, and how is it implemented?

Yes, the SN74CBT16210CDGGR supports partial-power-down operation via its Ioff feature, which limits reverse current to ≤10 µA when VCC = 0 V and I/O voltages range from 0 to 5.5 V. This is achieved through internal transistor biasing that disables conduction paths during power-off, preventing damaging backflow into powered subsystems. The SN74CBT16210CDGGR maintains high-impedance isolation between A and B ports under these conditions, satisfying JESD 78 Class II latch-up immunity requirements and enabling safe use in modular, multi-rail systems.

What is the typical ON-state resistance of the SN74CBT16210CDGGR, and how does it affect signal integrity?

The SN74CBT16210CDGGR has a typical ON-state resistance (ron) of 3 Ω at VCC = 4.5 V and IO = 30 mA, confirmed across multiple test conditions in the SCDS115C datasheet. This low ron minimizes voltage drop and duty-cycle distortion across switched signals, preserving logic thresholds and analog waveform fidelity. For example, at 64 mA current, ron remains ≤6 Ω-ensuring <384 mV drop in worst-case digital paths and supporting clean pass-through of DC-coupled analog signals up to 100 MHz without measurable attenuation or phase shift.

Can the SN74CBT16210CDGGR be used with 1.8-V or 2.5-V logic families, and what ensures compatibility?

Yes, the SN74CBT16210CDGGR supports 0–5.5 V signaling on all data I/Os (A and B ports), explicitly covering 0.8-V, 1.2-V, 1.5-V, 1.8-V, 2.5-V, 3.3-V, and 5-V logic families. Compatibility is ensured by voltage-independent FET switch architecture-no internal level-shifting or threshold dependencies-and by control inputs (1OE/2OE) that accept TTL or 5-V/3.3-V CMOS logic levels. The SN74CBT16210CDGGR thus enables seamless interconnection between heterogeneous voltage domains without external translators or voltage-margin concerns.

What package type and thermal characteristics apply to the SN74CBT16210CDGGR?

The SN74CBT16210CDGGR uses a 48-pin TSSOP package (DGG), measuring 12.6 mm × 6.2 mm × 1.2 mm with 0.5 mm pitch and NiPdAu lead finish. Its thermal impedance is θJA = 70°C/W (JEDEC standard board), enabling reliable operation at up to 85°C ambient when dissipating ≤150 mW. The package complies with JEDEC MO-153, is RoHS-compliant, and rated MSL-1 (unlimited floor life at ≤30°C/60% RH). These attributes make SN74CBT16210CDGGR suitable for compact, thermally constrained industrial and telecom PCB layouts.