Texas Instruments SN74CBT162292DL

Overview

SN74CBT162292DL from Texas Instruments is a 12-bit 1-of-2 FET multiplexer/demultiplexer with internal 500-Ω pulldown resistors, TTL-compatible control inputs, and 25-Ω series resistors on A-port I/Os. It provides make-before-break switching, isolation under power-off conditions, and supports high-speed data routing in bus-switching applications such as memory expansion and processor interconnects.

For engineers reviewing the SN74CBT162292DL datasheet, SN74CBT162292DL pinout, SN74CBT162292DL application, or SN74CBT162292DL equivalent, key selection criteria include on-state resistance (37–63 Ω), propagation delay (≤1.9 ns at VCC = 4 V), 56-pin SSOP package compatibility, and internal pulldown resistor integration eliminating external bias components.

Technical Context

This device implements a dual-path bidirectional analog switch architecture using NMOS pass transistors with integrated gate control logic. The S input selects between two B-port banks (B1/B2) for each of 12 A-port channels, while RINT connects to the unselected bank-enabling deterministic signal termination without external resistors.

Each A-port terminal includes an equivalent 25-Ω series resistor to suppress transmission-line overshoot/undershoot, and the 500-Ω internal pulldowns ensure defined logic states on B ports during power-down or floating conditions-critical for hot-swap and partial-power-down systems.

Key Specifications

Pinout & Package

SN74CBT162292DL is housed in a 56-pin SSOP (Shrink Small Outline Package) with 0.5 mm pitch, 13.9–14.1 mm body width, and 1.2 mm max height. Pin 1 is marked by a corner chamfer and located at top-left when viewed from top with marking side up.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBT162292DL, SN74CBTD16210DL adds 3-state capability at the expense of pulldown integration and lower speed, while SN74CBT16212DL matches DC specs but omits tmbb guarantee-making SN74CBT162292DL uniquely suitable for hot-swap and contention-sensitive bus routing.

Availability

SN74CBT162292DL is available at Aetrix Electronics and suitable for memory expansion interfaces, processor bus multiplexing, hot-swappable module interconnects, and legacy system signal routing requiring stable component supply across industrial temperature ranges.

Supply support for SN74CBT162292DL 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 company specializing in analog, embedded processing, and logic solutions, with over 50 years of leadership in high-reliability interface ICs.

The SN74CBT162292DL belongs to TI's Widebus™ family of high-speed FET bus switches, designed specifically for low-latency, low-distortion signal routing in memory, processor, and backplane interconnect applications.

FAQ

What is the maximum operating frequency supported by the SN74CBT162292DL?

The SN74CBT162292DL does not specify a maximum clock frequency, but its 1.9 ns propagation delay (tpd) and 2 ns make-before-break time (tmbb) support reliable operation in parallel bus systems running up to 500 MHz effective data rates. Actual usable frequency depends on load capacitance, trace impedance, and system-level timing margins-notably, CL = 50 pF is used in characterization, and performance scales inversely with capacitive loading.

Does the SN74CBT162292DL require external pull-down resistors on its B ports?

No, the SN74CBT162292DL integrates internal 500-Ω pulldown resistors on all B1 and B2 ports, eliminating the need for external components. This feature ensures defined logic-low states during power-down, standby, or unselected conditions-reducing BOM count and improving reliability in hot-swap and partial-power-down systems.

Can the SN74CBT162292DL be used in mixed-voltage applications (e.g., 5-V A port and 3.3-V B port)?

Yes, the SN74CBT162292DL supports input voltages from –0.5 V to 7 V on all I/O pins, making it compatible with mixed-voltage domains. Its 25-Ω series resistors on A ports further enhance robustness against overshoot when driving 3.3-V receivers from 5-V sources-no level shifters or external termination required for basic interoperability.

What is the thermal performance of the SN74CBT162292DL in its SSOP package?

The SN74CBT162292DL in the DL (SSOP) package has a thermal impedance θJA of 56°C/W, measured per JESD 51-7. At maximum recommended supply (5.5 V) and full 12-channel conduction, typical power dissipation remains below 15 mW-ensuring junction temperatures stay well within limits even in enclosed industrial enclosures without forced airflow.

Is the SN74CBT162292DL pin-compatible with other devices in the CBT16xxx family?

No, the SN74CBT162292DL is not pin-compatible with most other CBT16xxx devices due to its unique 56-pin layout, dual-B-bank architecture, and RINT terminal. For example, SN74CBT16212DL uses the same package but differs in pin mapping and lacks RINT-requiring PCB redesign for substitution. Always verify pinout diagrams before replacement.