SN74CBT3384APWRE4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The SN74CBT3384APWRE4 is a dual 5-bit CMOS FET bus switch providing low-resistance bidirectional signal routing with two active-low enable controls. It switches 3.3 V or 5 V signals with sub-1 Ω on-resistance and passes signals up to 200 MHz. Available in a 24-pin TSSOP package from Texas Instruments, in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 24
- Lifecycle
- OBSOLETE
- Datasheet
- SN74CBT3384APWRE4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SN74CBT3384APWRE4?
- Dual 5-bit bus-switch architecture with separate active-low enables allows independent control of two 5-bit data paths in a single 24-pin TSSOP package
- Near-zero propagation delay with sub-1 Ω on-resistance supports high-speed data buses up to 200 MHz without signal integrity degradation
- Bidirectional, voltage-transparent switching passes 3.3 V or 5 V signals with no logic translation, enabling direct data-bus muxing between ICs on mixed-voltage boards
What is SN74CBT3384APWRE4 used for?
The SN74CBT3384APWRE4 is widely used in CPU and memory bus architectures where a high-speed 10-bit data path must be switched between two sources—such as shared data buses in dual-processor server boards and high-speed memory expansion modules. Its FET-based architecture eliminates static power consumption on idle channels, making it suitable for power-sensitive embedded systems that need to multiplex peripheral data buses between a microcontroller and an FPGA. The device also fits VMEbus and PCI backplane designs where low on-resistance and minimal propagation delay are mandatory.
What are the specifications of SN74CBT3384APWRE4?
| YTEOL | 0 |
| Control Type | ENABLE LOW |
| Count Direction | UNIDIRECTIONAL |
| Family | CBT/FST/QS/5C/B |
| JESD-30 Code | R-PDSO-G24 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS DRIVER |
| Number of Bits | 5 |
| Number of Functions | 2 |
| Number of Ports | 2 |
| Output Characteristics | 3-STATE |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP24,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 0.003mA |
| Prop. Delay@Nom-Sup | 0.35ns |
| Propagation Delay (tpd) | 0.35ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 4V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| HTS Code | 8542.39.00.60 |
Where can I find the SN74CBT3384APWRE4 datasheet?
SN74CBT3384APWRE4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN74CBT3384APWRE4?
Compatible alternatives and drop-in replacements for SN74CBT3384APWRE4:
Bus Driver, CBT/FST/QS/5C/B Series, 2-Func, 5-Bit, True Output, CMOS, PDSO24
Bus Driver, CBT/FST/QS/5C/B Series, 2-Func, 5-Bit, True Output, CMOS, PDSO24
Bus Driver, CBT/FST/QS/5C/B Series, 2-Func, 1-Bit, True Output, CMOS, PDSO8
Bus Driver, CBT/FST/QS/5C/B Series, 2-Func, 1-Bit, True Output, CMOS, PDSO8
Bus Driver, CBT/FST/QS/5C/B Series, 2-Func, 1-Bit, True Output, CMOS, PDSO8
Bus Driver, CBT/FST/QS/5C/B Series, 2-Func, 2-Bit, True Output, CMOS, PDSO8
Frequently Asked Questions
What on-resistance does the SN74CBT3384APWRE4 exhibit, and why does it matter for high-speed bus design?
The SN74CBT3384APWRE4 features a typical FET on-resistance below 5 Ω at 3.3 V, which combined with a 50 pF load capacitance creates an RC time constant well under 1 ns—allowing signal transition times compatible with data buses operating up to 200 MHz without significant waveform degradation.
How do the two active-low enable pins on the SN74CBT3384APWRE4 allow independent bus arbitration in a dual-port memory design?
Each of the two 5-bit switch sections has its own active-low OE pin, so a bus arbiter can assert OE1 to connect CPU A to the memory bus while keeping OE2 deasserted to disconnect CPU B—implementing a simple 10-bit bus multiplexer with no glitch between the two data paths when enables are interleaved.
Can the SN74CBT3384APWRE4 pass 5 V logic signals on a 3.3 V powered system board?
Yes—the device is designed to pass analog bus voltages up to 5.5 V through the FET switches regardless of the VCC supply voltage, enabling bidirectional translation-free bridging between 5 V legacy peripherals and 3.3 V processors on mixed-voltage PCBs without requiring separate level-shifter ICs.
What is the total bit-width of the SN74CBT3384APWRE4 and how does that map to common data bus widths?
The device provides 10 switch channels organized as two independent 5-bit sections, allowing two separate 5-bit nibbles—or one combined 10-bit sub-bus—to be switched simultaneously, fitting naturally into 8-bit, 10-bit, and 16-bit data path designs in embedded processors and DSP memory interfaces.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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