Texas Instruments SN74CBT16210CDL

Overview

SN74CBT16210CDL 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) in PCI interface and memory interleaving applications.

For engineers reviewing the SN74CBT16210CDL datasheet, SN74CBT16210CDL pinout, SN74CBT16210CDL application, or SN74CBT16210CDL equivalent, key selection criteria include Ioff-enabled partial-power-down capability, 5.5 pF typical OFF-state I/O capacitance, dual OE control for independent 10-bit switching, and SSOP-48 package compatibility with industrial temperature range (−40°C to 85°C).

Technical Context

The SN74CBT16210CDL implements TTL-compatible CMOS control logic with two independent output-enable inputs (1OE, 2OE), each controlling a 10-bit FET switch array. Its active undershoot-protection circuitry monitors A/B port voltages and forces OFF-state isolation when undershoot exceeds −2 V.

Each switch channel exhibits near-zero propagation delay due to low ron (3 Ω typ.) and minimal parasitic capacitance (Cio(OFF) = 5.5 pF typ.), enabling high-fidelity signal gating for digital buses. The device supports Ioff mode to prevent backflow current during partial power-down, meeting JESD 78 Class II latch-up performance (>100 mA).

Key Specifications

Pinout & Package

SN74CBT16210CDL uses a 48-pin SSOP (DL) package with 0.5-mm pitch, 12.4 mm × 6.2 mm body size, and 1.2-mm maximum height per JEDEC MO-153. Pin 1 is located in Quadrant Q1 per tape-and-reel orientation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBTD16210DGGR and 74ALVC164245DGGR, the SN74CBT16210CDL uniquely combines bidirectional operation, −2 V undershoot hardening, and 5.5 pF OFF-capacitance-making it the only option qualified for PCI-compliant hot-plug isolation without added protection components.

Availability

SN74CBT16210CDL is available at Aetrix Electronics and suitable for PCI interface design, memory interleaving systems, and low-distortion signal gating applications requiring stable component supply across industrial temperature ranges.

Supply support for SN74CBT16210CDL 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 high-reliability IC design.

The SN74CBT16210CDL belongs to TI's Widebus™ family of high-speed FET bus switches, engineered specifically for low-distortion, bidirectional signal routing in computing, communications, and industrial backplane architectures.

FAQ

What is the maximum undershoot voltage the SN74CBT16210CDL can withstand on its A and B ports?

The SN74CBT16210CDL provides active undershoot protection up to −2 V on both A and B ports, as verified in the SCDS115C datasheet Section 5. This protection is implemented via internal sensing circuitry that forces the switch into a guaranteed OFF state during transient events, preventing false conduction or damage without requiring external diodes.

Does the SN74CBT16210CDL support partial-power-down operation, and how is it implemented?

Yes, the SN74CBT16210CDL supports partial-power-down via its Ioff feature, which limits current to 10 µA max when VCC = 0 V and VI/O = 0–5.5 V. This ensures no damaging back-current flows through the device during power sequencing, enabling safe hot-swap and multi-rail system designs as specified in the absolute maximum ratings table.

What is the typical ON-state resistance (ron) of the SN74CBT16210CDL, and how does it affect signal integrity?

The SN74CBT16210CDL has a typical ON-state resistance of 3 Ω, measured at VCC = 4.5 V with IO = 30 mA. This low ron minimizes voltage drop (<90 mV at 30 mA) and preserves signal amplitude across the switch, directly contributing to high-fidelity data transmission in 20-bit parallel buses such as PCI and memory interfaces.

Can the SN74CBT16210CDL interface between different logic voltage domains, and what are its supported I/O voltage levels?

Yes, the SN74CBT16210CDL supports bidirectional signal translation across 0.8-V, 1.2-V, 1.5-V, 1.8-V, 2.5-V, 3.3-V, and 5-V logic families. Its data I/Os tolerate 0–5.5 V regardless of VCC, and control inputs accept TTL or 3.3-V/5-V CMOS levels-enabling seamless interconnection without external level shifters.

What package type and thermal characteristics apply to the SN74CBT16210CDL?

The SN74CBT16210CDL uses a 48-pin SSOP (DL) package with θJA = 63°C/W. Its dimensions are 12.4 mm × 6.2 mm × 1.2 mm max height, compliant with JEDEC MO-153. The four GND pins and exposed pad-free construction optimize thermal dissipation for continuous operation at −40°C to 85°C ambient.