Texas Instruments SN74CBTLV3253PW

Overview

SN74CBTLV3253PW from Texas Instruments is a dual 1-of-4 low-voltage FET multiplexer/demultiplexer in TSSOP-16 package, featuring 5 Ω typical ON-state resistance, rail-to-rail I/O switching, and I_off support for partial-power-down operation. It enables high-speed signal routing in 2-channel, 4:1 configurations for data path management in enterprise computing and wired networking systems.

For engineers reviewing the SN74CBTLV3253PW datasheet, SN74CBTLV3253PW pinout, SN74CBTLV3253PW application, or SN74CBTLV3253PW equivalent, key selection criteria include its 2.3–3.6 V supply range, sub-1 ns propagation delay at 3.3 V, ±128 mA channel current rating, and guaranteed isolation during power-off via I_off.

Technical Context

The SN74CBTLV3253PW implements two independent 1-of-4 analog switches using low-threshold FETs, each controlled by active-low OE and 2-bit S1/S0 select logic. Its rail-to-rail I/O supports voltage translation across the full 0–3.6 V range without level-shifting circuitry.

Functional modes are defined by OE (enable/disable), S1/S0 (channel selection), and I_off behavior: when V_CC = 0 V, leakage remains ≤15 µA per I/O terminal, preventing backdrive in powered-down subsystems while maintaining high-impedance isolation.

Key Specifications

Pinout & Package

TSSOP-16 package (5.00 mm × 4.40 mm), 0.65 mm pitch, exposed pad not present, RoHS-compliant NiPdAu finish, MSL Level-1 (260 °C, unlimited reflow).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBTLV3253PW, SN74CBTLV3253PWR offers identical performance with assured long-term supply, while QS3253M trades off temperature range and I_off safety for lower unit cost in non-critical environments.

Availability

SN74CBTLV3253PW is available at Aetrix Electronics and suitable for datacenter interconnect, wired networking switch, and industrial video encoder applications requiring stable component supply and guaranteed long-term sourcing.

Supply support for SN74CBTLV3253PW 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 SN74CBTLV3253PW belongs to TI's CBTLV logic family, designed specifically for high-speed, low-voltage signal routing in enterprise infrastructure and industrial control systems where power sequencing reliability and signal fidelity are critical.

FAQ

What is the maximum operating frequency supported by the SN74CBTLV3253PW?

The SN74CBTLV3253PW does not specify a hard maximum frequency limit, but its 0.15–0.25 ns propagation delay at 3.3 V and 5 Ω R_on enable reliable operation up to 500 MHz for digital signals and 6 Gbps for HDMI 2.0 TMDS lanes. Performance depends on PCB layout, load capacitance, and termination; keep trace lengths short and use 30 pF test loads per datasheet conditions.

Does the SN74CBTLV3253PW support hot-swap or live-insertion scenarios?

Yes, the SN74CBTLV3253PW supports hot-swap via its I_off feature: when V_CC = 0 V, leakage remains ≤15 µA per I/O terminal, preventing damaging back-current flow. This allows safe insertion into powered-backplane systems, provided OE is held high during power-up and proper decoupling is used per Section 9 of the datasheet.

Can the SN74CBTLV3253PW be used to route analog signals such as audio or sensor outputs?

Yes, the SN74CBTLV3253PW is suitable for analog signal routing including audio and sensor outputs due to its rail-to-rail I/O capability (–0.5 V to 4.6 V), low 5 Ω R_on, and flat on-resistance vs. voltage curve. For audio, THD remains <0.01% at 1 kHz; for sensors, offset error is <1 mV with matched trace impedance.

What is the difference between SN74CBTLV3253PW and SN74CBTLV3253PWR?

SN74CBTLV3253PW is the tube-packaged, obsolete version; SN74CBTLV3253PWR is the tape-and-reel variant (2000 pcs/reel) with active status and identical electrical specifications. Both share the same TSSOP-16 package, pinout, and performance - PWR is TI's recommended version for new designs and volume production.

How should unused control inputs be handled on the SN74CBTLV3253PW?

All unused control inputs (S0, S1, 1OE, 2OE) on the SN74CBTLV3253PW must be tied to either V_CC or GND to prevent floating states that cause increased ICC, noise susceptibility, or undefined channel selection. TI recommends pull-up resistors to V_CC for OE pins to ensure default high-Z state during power-up, per Implications of Slow or Floating CMOS Inputs application note.