Texas Instruments SN74CBTLV3383PW

Overview

SN74CBTLV3383PW from Texas Instruments is a low-voltage 10-bit FET bus-exchange switch in TSSOP-24 package, featuring 5 Ω typical on-state resistance, rail-to-rail signal switching (0 V to VCC), and Ioff partial-power-down protection. It operates from 2.3 V to 3.6 V and supports bidirectional data flow in high-speed communication boards and rack servers.

For engineers reviewing the SN74CBTLV3383PW datasheet, SN74CBTLV3383PW pinout, SN74CBTLV3383PW application, or SN74CBTLV3383PW equivalent, key selection criteria include its 0.15 ns propagation delay at 2.5 V, 128 mA continuous channel current rating, BE/BX dual-control logic for bus exchange mode, and guaranteed isolation during power-off states.

Technical Context

The SN74CBTLV3383PW implements ten independent FET-based bilateral switches with symmetrical source-drain conduction-enabling true bidirectional analog/digital signal routing without directionality constraints. Its functional modes are fully defined by two control inputs: BE (active-low enable) and BX (bus-exchange select), with three distinct states: disabled (BE = high), 10-bit pass-through (BE = low, BX = low), and 5-bit A/B pair swap (BE = low, BX = high).

It uses Ioff circuitry to block current backflow when VCC = 0 V, ensuring safe partial-power-down operation per JESD78. The device maintains <13.5 pF input-to-output capacitance and supports overvoltage tolerance up to 4.6 V on I/O pins regardless of VCC level-critical for mixed-supply system interfacing.

Key Specifications

Pinout & Package

TSSOP-24 package (7.80 mm × 4.40 mm, 1.2 mm max height), lead finish NIPDAU, moisture sensitivity level (MSL) Level-1 (unlimited floor life at ≤30 °C/60% RH).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBTLV3384PW and PI3CH480LE, the SN74CBTLV3383PW uniquely combines 10-bit density, programmable bus exchange, and Ioff protection in a single TSSOP-24 package-making it optimal for reconfigurable, hot-pluggable interconnects where signal routing flexibility and power-domain independence are mandatory.

Availability

SN74CBTLV3383PW is available at Aetrix Electronics and suitable for high-speed memory interconnect, rack-mount server backplane switching, and industrial communication board signal multiplexing requiring stable component supply across extended product lifecycles.

Supply support for SN74CBTLV3383PW 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 delivering analog and embedded processing solutions, with over 90 years of innovation in precision analog, power management, and logic devices.

The SN74CBTLV3383PW belongs to TI's CBTLV low-voltage logic family, engineered specifically for high-speed, low-latency signal routing in computing, communications, and industrial infrastructure where power efficiency and signal integrity are critical.

FAQ

What is the maximum operating frequency supported by the SN74CBTLV3383PW?

The SN74CBTLV3383PW is characterized for operation up to 200 MHz, verified via switching characteristics testing at 2.5 V and 3.3 V supply voltages. Its 0.15 ns minimum propagation delay and 13.5 pF input-to-output capacitance ensure signal integrity at these frequencies without added timing uncertainty. System-level bandwidth may vary based on PCB layout, termination, and load capacitance.

Does the SN74CBTLV3383PW support hot-swap applications?

Yes, the SN74CBTLV3383PW supports hot-swap applications through its Ioff feature, which limits leakage current to 10 µA max when VCC = 0 V. This prevents damaging backflow current during live insertion or removal in multi-rail systems. Proper decoupling and BE pin control sequencing are required to maintain isolation during transition states.

Can the SN74CBTLV3383PW be used with 5 V logic signals?

No-the SN74CBTLV3383PW I/O pins tolerate up to 4.6 V regardless of VCC, but it is not designed for sustained 5 V operation. Its absolute maximum VI rating is 4.6 V, and recommended operating conditions specify VCC between 2.3 V and 3.6 V. For 5 V systems, level-shifting or a 5 V–tolerant alternative is required.

How does the bus-exchange function work on the SN74CBTLV3383PW?

The bus-exchange function activates when BE = low and BX = high, causing the device to swap signal pairs: (1A1↔1B2), (1A2↔1B1), (2A1↔2B2), (2A2↔2B1), and (3A1↔3B2), etc. This 5-bit A/B pair reversal enables dynamic signal path reconfiguration without external logic. When BX = low and BE = low, it operates as a standard 10-bit pass-through switch.

What is the thermal performance of the SN74CBTLV3383PW in TSSOP package?

In the TSSOP-24 (PW) package, the SN74CBTLV3383PW has a junction-to-ambient thermal resistance (RθJA) of 90.1 °C/W and junction-to-board (RθJB) of 45.2 °C/W. These values assume standard JEDEC 2-layer board conditions. For continuous 128 mA per channel operation, derating is recommended above 70 °C ambient to maintain junction temperature below 125 °C.