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Home > Products > Integrated Circuits (ICs) > Logic > Signal Switches, Multiplexers, Decoders

Texas Instruments SN74CBTD3384PWRG4

Name: SN74CBTD3384PWRG4
Brand: Texas Instruments
SKU: SN74CBTD3384PWRG4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74CBTD3384PWRG4

Manufacturer:: Texas Instruments

Category:: Signal Switches, Multiplexers, Decoders

Package:: 24-TSSOP (0.173", 4.40mm Width)

Datasheet:: SN74CBTD3384PWRG4.pdf

Description:: IC BUS SWITCH 5 X 1:1 24TSSOP

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Product details

Overview

SN74CBTD3384PWRG4 from Texas Instruments is a 10-bit high-speed TTL-compatible bus switch IC with dual 5-bit independent channels, 5-Ω on-state resistance, 0.25 ns propagation delay, and integrated level-shifting diode enabling 5-V-to-3.3-V signal translation in mixed-voltage systems such as memory interface buffers.

For engineers reviewing the SN74CBTD3384PWRG4 datasheet, SN74CBTD3384PWRG4 pinout, SN74CBTD3384PWRG4 application, or SN74CBTD3384PWRG4 equivalent, key selection criteria include bidirectional low-R_ON switching, separate OE control per channel, ±128 mA continuous channel current rating, and TSSOP-24 package compatibility with high-density PCB layouts.

Technical Context

The SN74CBTD3384PWRG4 implements two independent 5-bit bidirectional analog switches controlled by dedicated OE inputs (1OE and 2OE), each enabling low-impedance connection between A- and B-side ports when asserted low. Its architecture integrates internal clamp diodes to V_CC, supporting level shifting without external components.

Switching is governed by TTL-compatible input thresholds (V_IL = 0.8 V, V_VIH = 2 V) and operates across 4.5–5.5 V supply range. Propagation delay (0.25 ns typical) is derived from R_ON–C_L time constant, not logic gate delay, making it suitable for high-frequency data path isolation and voltage-domain bridging.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	4.5 V to 5.5 V - Ensures stable operation in standard 5-V digital systems with ±10% tolerance.
R_ON	5 Ω typical - Enables minimal signal attenuation and negligible added propagation delay in high-speed data paths.
t_pd	0.25 ns typical - Reflects RC-limited delay of switch conduction, not logic propagation; supports >1 GHz edge-rate applications.
I_O Continuous	±128 mA per channel - Supports robust drive capability for terminated buses and fan-out to multiple loads.
V_IL/V_IH	0.8 V / 2.0 V - TTL-compatible control inputs allow direct interfacing with legacy 5-V logic without level translators.
C_io(OFF)	3.5 pF - Low off-state capacitance minimizes crosstalk and signal coupling between isolated ports.
Operating Temp	−40°C to +85°C - Qualified for industrial temperature range, suitable for embedded controllers and communications equipment.

Pinout & Package

TSSOP-24 (PW) package: 4.4 mm × 5.0 mm body, 0.65 mm pitch, 1.2 mm max height, lead-free (NIPDAU), moisture sensitivity Level-1.

Pin/Terminal	Circuit Role	Design Meaning
1OE, 2OE	Channel enable inputs	Active-low enables respective 5-bit switch banks; high-impedance state when high.
1A1–1A5, 2A1–2A5	Port A terminals	Input/output side of first/second 5-bit switch bank; bidirectional signal path.
1B1–1B5, 2B1–2B5	Port B terminals	Input/output side of first/second 5-bit switch bank; connected to A-side when OE low.
V_CC	Power supply	5-V supply rail; powers internal clamp diodes enabling 5-V-to-3.3-V level shifting.
GND	Ground reference	Common return path for all signals and internal circuitry; required for proper diode clamping.

Key Features

Feature	Design Value
Bidirectional 5-Ω switching	Enables transparent, low-loss signal routing in either direction without polarity constraints.
Dual independent OE controls	Allows selective activation of each 5-bit channel, supporting partial bus isolation and power-aware gating.
Integrated V_CC-clamp diodes	Permits level shifting from 5-V inputs to 3.3-V outputs without external diodes or resistors.
0.25 ns propagation delay	Minimizes timing skew in high-speed parallel interfaces like memory data buses and address latches.
TTL-compatible control inputs	Eliminates need for additional logic-level translators when driven by standard 5-V microcontrollers or FPGAs.

Applications

Memory Interface Buffering	PCI/PCI-X Bus Isolation
Use Scenario: Isolating DDR SDRAM data lines between 5-V controller and 3.3-V memory module while maintaining signal integrity. IC Role / Device Role / Timing Role: Bidirectional bus switch providing low-R_ON path with sub-nanosecond delay and integrated level shifting. Use Value: Eliminates discrete level shifters and reduces board space; preserves timing margins under fast edge rates.	Use Scenario: Segmenting PCI bus segments to prevent noise coupling and support hot-plug detection in industrial backplanes. IC Role / Device Role / Timing Role: High-speed analog switch enabling dynamic bus partitioning with independent channel enables. Use Value: Prevents ground bounce and signal reflection across domains; supports <10 ns disable time for clean bus arbitration.
FPGA I/O Voltage Translation	Legacy Microcontroller Expansion
Use Scenario: Interfacing 5-V peripheral sensors to 3.3-V FPGA I/O banks in industrial automation controllers. IC Role / Device Role / Timing Role: Level-shifting bus switch translating control/data signals without adding logic delay. Use Value: Maintains deterministic timing for synchronous sensor reads; avoids setup/hold violations from translator latency.	Use Scenario: Expanding address/data bus of an 8051-based system with external peripherals operating at different voltage rails. IC Role / Device Role / Timing Role: TTL-compatible switch enabling selective connection of memory-mapped peripherals. Use Value: Provides software-controllable bus segmentation using existing 5-V control signals-no firmware changes needed.

Memory Interface Buffering

PCI/PCI-X Bus Isolation

Use Scenario: Isolating DDR SDRAM data lines between 5-V controller and 3.3-V memory module while maintaining signal integrity.

IC Role / Device Role / Timing Role: Bidirectional bus switch providing low-R_ON path with sub-nanosecond delay and integrated level shifting.

Use Value: Eliminates discrete level shifters and reduces board space; preserves timing margins under fast edge rates.

Use Scenario: Segmenting PCI bus segments to prevent noise coupling and support hot-plug detection in industrial backplanes.

IC Role / Device Role / Timing Role: High-speed analog switch enabling dynamic bus partitioning with independent channel enables.

Use Value: Prevents ground bounce and signal reflection across domains; supports <10 ns disable time for clean bus arbitration.

FPGA I/O Voltage Translation

Legacy Microcontroller Expansion

Use Scenario: Interfacing 5-V peripheral sensors to 3.3-V FPGA I/O banks in industrial automation controllers.

IC Role / Device Role / Timing Role: Level-shifting bus switch translating control/data signals without adding logic delay.

Use Value: Maintains deterministic timing for synchronous sensor reads; avoids setup/hold violations from translator latency.

Use Scenario: Expanding address/data bus of an 8051-based system with external peripherals operating at different voltage rails.

IC Role / Device Role / Timing Role: TTL-compatible switch enabling selective connection of memory-mapped peripherals.

Use Value: Provides software-controllable bus segmentation using existing 5-V control signals-no firmware changes needed.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74CBT3384PWR	No integrated V_CC clamp diodes; requires external level-shifting circuitry for 5-V-to-3.3-V use.	Not suitable for level-shifting applications without added components; lower cost where voltage domains match.	Select when both sides operate at same voltage and lowest possible R_ON (3 Ω) is prioritized over integration.
SN74LVC1G3157DCKR	Single-pole double-throw (SPDT) switch; 5-V tolerant inputs but no built-in level-shifting diodes.	Supports only 1-bit switching per device; requires 10 units to match SN74CBTD3384PWRG4's 10-bit capacity.	Choose for low-channel-count, space-constrained designs where flexibility in signal routing outweighs density.

Compared with SN74CBTD3384PWRG4, SN74CBT3384PWR offers lower on-resistance but lacks level-shifting capability, while SN74LVC1G3157DCKR provides voltage-tolerant switching at single-bit granularity-neither matches the integrated dual-5-bit, level-shifting functionality of SN74CBTD3384PWRG4 in compact TSSOP-24 form.

Availability

SN74CBTD3384PWRG4 is available at Aetrix Electronics and suitable for memory interface buffering, PCI bus isolation, FPGA I/O translation, and legacy microcontroller expansion requiring stable component supply and industrial-temperature operation.

Supply support for SN74CBTD3384PWRG4 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 'CBTD3384 product line delivers high-speed, low-R_ON bus switches designed specifically for voltage-domain bridging and signal isolation in mixed-supply digital systems.

FAQ

What is the maximum continuous current rating per channel of the SN74CBTD3384PWRG4?

The SN74CBTD3384PWRG4 supports ±128 mA continuous channel current per switch path. This rating ensures reliable operation when driving terminated transmission lines or multiple CMOS inputs, and is validated across the full −40°C to +85°C industrial temperature range specified for the SN74CBTD3384PWRG4.

Does the SN74CBTD3384PWRG4 support true bidirectional signal flow?

Yes, the SN74CBTD3384PWRG4 implements passive analog switches with no intrinsic directionality-signals pass equally well from A-to-B or B-to-A when the corresponding OE input is low. This bidirectional behavior is inherent to its MOSFET-based switch architecture and is explicitly confirmed in the function table and logic diagram of the SN74CBTD3384PWRG4 datasheet.

Can the SN74CBTD3384PWRG4 be used for 3.3-V-to-5-V level shifting?

No-the integrated clamp diodes in the SN74CBTD3384PWRG4 are configured to shift 5-V inputs down to 3.3-V outputs only. The device does not support reverse-level shifting (3.3-V-to-5-V) because the diode orientation and internal structure are unidirectional; attempting this may result in improper clamping or damage if output voltages exceed V_CC + 0.5 V.

What is the recommended handling for unused OE inputs on the SN74CBTD3384PWRG4?

All unused OE inputs on the SN74CBTD3384PWRG4 must be tied to either V_CC or GND to prevent floating states that can cause increased ICC, erratic switching, or ESD susceptibility. TI's application report SCBA004 explicitly mandates this practice for proper SN74CBTD3384PWRG4 operation and reliability.

Is the SN74CBTD3384PWRG4 pin-compatible with other packages in the CBTD3384 family?

Yes-the SN74CBTD3384PWRG4 shares identical pinout and signal mapping with other 24-pin variants including SN74CBTD3384DBR (SSOP) and SN74CBTD3384DWR (SOIC), as confirmed by the top-view diagrams and function tables in the SCDS025R datasheet. This allows drop-in replacement across DB, DW, and PW packages when footprint and thermal requirements permit.

SN74CBTD3384PWRG4 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74CBTD

Package/Case:: 24-TSSOP (0.173", 4.40mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Type:: Bus Switch

Circuit:: 5 x 1:1

Independent Circuits:: 2

Current - Output High, Low:: -

Voltage Supply Source:: Single Supply

Voltage - Supply:: 4.5V ~ 5.5V

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 24-TSSOP

SN74CBTD3384PWRG4 FAQ

1.How can I place an order for SN74CBTD3384PWRG4 through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74CBTD3384PWRG4 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for SN74CBTD3384PWRG4 reliable?

The price and inventory of SN74CBTD3384PWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74CBTD3384PWRG4 is usually 5 days.

3.What payment methods are accepted for SN74CBTD3384PWRG4?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74CBTD3384PWRG4 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74CBTD3384PWRG4?

SN74CBTD3384PWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74CBTD3384PWRG4 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for SN74CBTD3384PWRG4?

For technical support, including SN74CBTD3384PWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74CBTD3384PWRG4 requirements.

6.How does Aetrix verify that SN74CBTD3384PWRG4 is sourced from the original manufacturer or authorized distributors?

All SN74CBTD3384PWRG4 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SN74CBTD3384PWRG4 meets industry standards.

7.What is the process for return or replacement of SN74CBTD3384PWRG4?

All SN74CBTD3384PWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74CBTD3384PWRG4, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The SN74CBTD3384PWRG4 part is unused and in its original packaging.

Return procedure for SN74CBTD3384PWRG4:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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