Texas Instruments SN74CBTLV16212DLR

Overview

SN74CBTLV16212DLR from Texas Instruments is a 24-bit high-speed bus switch with break-before-make switching, 4-Ω on-state resistance, rail-to-rail data I/O capability, and I_off support for partial-power-down mode. It operates as either a 24-bit bus switch or 12-bit bus exchanger across four signal ports (A1/A2/B1/B2), enabling dynamic data path routing in memory expansion and FPGA interconnect applications.

For engineers reviewing the SN74CBTLV16212DLR datasheet, SN74CBTLV16212DLR pinout, SN74CBTLV16212DLR application, or SN74CBTLV16212DLR equivalent, key selection criteria include its 56-pin SSOP package, 2.3–3.6 V supply range, sub-nanosecond propagation delay (0.15 ns typ at 2.5 V), and guaranteed isolation during power-off via I_off.

Technical Context

The SN74CBTLV16212DLR implements a CMOS FET-based analog switch architecture with three select inputs (S0–S2) controlling bidirectional signal routing between A- and B-side ports. Its break-before-make logic prevents momentary short-circuit current during state transitions, critical for hot-swap and live-insertion systems.

Each of the 24 switch channels features rail-to-rail voltage handling (−0.5 V to 4.6 V), 128 mA continuous channel current rating, and <10 µA I_off leakage when V_CC = 0 V - ensuring robust signal integrity and backflow protection in mixed-voltage or powered-down subsystems.

Key Specifications

Pinout & Package

SN74CBTLV16212DLR is housed in a 56-pin Shrink Small-Outline Package (SSOP-DL), measuring 11.4 mm × 11.2 mm × 2.0 mm (max height), with 0.5 mm lead pitch and NIPDAU lead finish. The package complies with JEDEC MO-194 and is rated MSL Level-1 (260°C peak reflow).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBTLV3861RGYR and SN74CBT16212DGGR, the SN74CBTLV16212DLR uniquely combines 24-bit exchange capability, I_off-enabled power management, and 2.5/3.3 V operation - making it optimal for modern low-voltage, dynamically reconfigurable embedded systems.

Availability

SN74CBTLV16212DLR is available at Aetrix Electronics and suitable for memory expansion interfaces, FPGA I/O multiplexing, hot-swap backplane interconnects, and legacy bus protocol translation requiring stable component supply and long-term industrial availability.

Supply support for SN74CBTLV16212DLR 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 components.

The SN74CBTLV16212DLR belongs to TI's Widebus™ family of high-speed bus switches, engineered specifically for low-latency, low-distortion signal routing in memory, FPGA, and backplane applications demanding rail-to-rail performance and power-aware design.

FAQ

What is the maximum operating frequency supported by the SN74CBTLV16212DLR?

The SN74CBTLV16212DLR does not specify a maximum clock frequency, but its 0.15 ns typical propagation delay at 2.5 V implies usable operation beyond 5 GHz for single-event switching. System-level bandwidth depends on trace impedance, load capacitance, and signal integrity design - the device's 4–8 Ω r_on and 8 pF off-capacitance help maintain rise/fall times under 100 ps in well-designed layouts. For sustained high-speed bus operation, derating per application note SCBA004 is recommended.

Does the SN74CBTLV16212DLR require external pull-up or pull-down resistors on its S0/S1/S2 control inputs?

No, the SN74CBTLV16212DLR does not require external biasing on S0/S1/S2 - however, TI explicitly requires all unused control inputs to be held at V_CC or GND to prevent floating states that may cause undefined switching behavior or increased ICC. This is specified in Note 3 of the recommended operating conditions. The SN74CBTLV16212DLR's CMOS inputs draw only ±1 µA, so direct connection to system rails is sufficient and preferred over resistor networks.

Can the SN74CBTLV16212DLR be used to switch analog signals such as audio or sensor outputs?

Yes, the SN74CBTLV16212DLR supports rail-to-rail analog signal switching from −0.5 V to V_CC + 0.5 V, making it suitable for DC-coupled analog signals within that range. Its 4–8 Ω r_on introduces minimal gain error (<0.1% at 1 kΩ load), and 8 pF off-capacitance limits bandwidth degradation. However, it is not characterized for THD, noise, or crosstalk in audio-frequency applications - for precision analog use, TI recommends dedicated analog switches like the TMUX series. The SN74CBTLV16212DLR excels in digital bus routing, not high-fidelity analog paths.

What is the thermal performance of the SN74CBTLV16212DLR in its SSOP-DL package?

The SN74CBTLV16212DLR in the DL package has a junction-to-ambient thermal resistance (θ_JA) of 56°C/W under standard JEDEC test conditions. At maximum ambient temperature (85°C) and worst-case power dissipation (ICC ≈ 10 µA + ∆ICC ≈ 310 µA total), self-heating remains below 0.02°C - confirming negligible thermal impact. For high-current switching (128 mA per channel), localized heating is managed by the four GND pins and copper pour; PCB layout per TI's DGV/DL package guidelines is essential to maintain reliability.

Is the SN74CBTLV16212DLR pin-compatible with other members of the CBTLV16212 family?

Yes, the SN74CBTLV16212DLR shares identical pinout and functionality with SN74CBTLV16212DL (tube), SN74CBTLV16212GR (TSSOP), and SN74CBTLV16212VR (TVSOP) - all are 56-pin, functionally identical variants differing only in package type and reel/tube packaging. The top-side marking "CBTLV16212" is consistent across DL, DGG, and DGV packages. No PCB redesign is needed when migrating between these variants, provided land patterns match respective package drawings (MO-194 for DL/DGG, MO-153 for DGV).