Texas Instruments SN74CBT16210DLR

Overview

SN74CBT16210DLR from Texas Instruments is a 20-bit FET bus switch IC in SSOP-48 package, featuring 5 Ω typical on-state resistance, TTL-compatible control inputs (VIH = 2 V, VIL = 0.8 V), and dual 10-bit independent switching channels with separate OE pins. It enables high-speed bidirectional signal routing in memory expansion, data multiplexing, and hot-swap I/O isolation applications.

For engineers reviewing the SN74CBT16210DLR datasheet, SN74CBT16210DLR pinout, SN74CBT16210DLR application, or SN74CBT16210DLR equivalent, key selection criteria include its 0.25 ns propagation delay at 5 V, ±1 µA input leakage, 5–7 Ω on-resistance across 4–5.5 V supply range, and compatibility with 3.3 V/5 V mixed-voltage systems requiring low-capacitance switching.

Technical Context

The SN74CBT16210DLR implements two independent 10-bit FET-based transmission gates controlled by dedicated OE inputs, supporting either dual 10-bit or unified 20-bit bus switching modes. Its architecture delivers near-zero propagation delay via low-R_ON FETs and maintains high-impedance isolation when OE is high.

Each channel operates with TTL-level compatible control logic, supports bidirectional signal flow without direction pins, and exhibits 5.5 pF off-state capacitance - critical for minimizing signal integrity degradation in high-frequency data paths up to 100 MHz.

Key Specifications

Pinout & Package

SN74CBT16210DLR uses a 48-pin SSOP (DL) package measuring 12.6 mm × 6.1 mm × 2.3 mm (max height), JEDEC MO-153 compliant, with 0.5 mm pitch and Q1 pin-1 quadrant orientation in tape-and-reel delivery.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBT16210DLR, SN74CBTD16210DGGR adds bus-hold but shares identical pinout and switching performance, whereas SN74LVC16245ADGGR requires redesign for voltage domain and direction control - making the former a closer functional alternative for industrial 5 V bus isolation.

Availability

SN74CBT16210DLR is available at Aetrix Electronics and suitable for memory expansion interfaces, data multiplexing systems, hot-swap I/O isolation, and legacy bus bridging requiring stable component supply across industrial design cycles.

Supply support for SN74CBT16210DLR 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 SN74CBT16210DLR belongs to TI's Widebus™ family of high-speed FET bus switches, designed specifically for low-latency, low-distortion signal routing in 5 V digital systems requiring minimal propagation delay and high off-isolation.

FAQ

What is the maximum operating voltage for SN74CBT16210DLR?

The SN74CBT16210DLR has an absolute maximum supply voltage rating of 7 V, but its recommended operating range is strictly 4 V to 5.5 V. Operating outside this range risks violating the specified on-resistance, propagation delay, and leakage current parameters - the SN74CBT16210DLR must be powered within 4–5.5 V to guarantee compliance with its published electrical characteristics.

Does SN74CBT16210DLR support bidirectional signal flow without additional control signals?

Yes, the SN74CBT16210DLR supports true bidirectional signal flow on all 20 channels without direction pins or external logic. Each A–B path functions as a passive transmission gate - signals pass identically in either direction when the corresponding OE pin is asserted low, making the SN74CBT16210DLR ideal for bus-sharing and memory-mapped I/O applications.

Can SN74CBT16210DLR be used in 3.3 V systems?

The SN74CBT16210DLR is not rated for standalone 3.3 V operation: its minimum recommended VCC is 4 V, and TTL-compatible inputs require VIH ≥ 2 V, which may not be reliably met from 3.3 V logic. While it may function at 3.3 V in some cases, TI does not characterize or guarantee performance - use SN74CBT16210DLR only in 4–5.5 V systems to ensure full specification compliance.

How many ground pins does SN74CBT16210DLR have, and why are they important?

The SN74CBT16210DLR features four dedicated ground pins (Pins 8, 17, 35, and 44) distributed across the SSOP-48 package. This layout reduces ground impedance, minimizes switching noise coupling, and stabilizes threshold voltages for the 20 independent FET channels - critical for maintaining consistent r_ON and t_pd across all bits in high-speed operation.

Is SN74CBT16210DLR pin-compatible with other members of the Widebus™ family?

The SN74CBT16210DLR shares the same 48-pin SSOP (DL) footprint and pin assignment with SN74CBT16210DL and SN74CBT16210DL.A, but is not pin-compatible with TSSOP (DGG) or TVSOP (DGV) variants like SN74CBT16210DGGR - those use different package outlines and land patterns despite identical logic functionality and pin naming.