SN74CBT3383CDGVRE4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments SN74CBT3383CDGVRE4 is an 8-bit dual-supply bidirectional bus switch with active-low enable in a 24-pin SOIC package. It supports 50 pF load capacitance per channel and provides near-zero propagation delay for high-speed bus switching. Available in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 24
- Lifecycle
- OBSOLETE
- Datasheet
- SN74CBT3383CDGVRE4 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 SN74CBT3383CDGVRE4?
- 8-bit bidirectional FET bus switch with near-zero propagation delay for transparent signal routing
- Dual-supply architecture supports mixed 3.3 V and 5 V bus voltage levels in a single device
- Active-low enable control allows simple gating of 8 data lines with a single control signal
- 24-pin SOIC package with 50 pF load capacitance rating for high-speed digital bus switching applications
What is SN74CBT3383CDGVRE4 used for?
The SN74CBT3383CDGVRE4 is used in data bus multiplexing, memory bus isolation, and level-tolerant signal routing in mixed-voltage digital systems. Its dual-supply design makes it ideal for bridging 3.3 V MCU buses to 5 V peripheral buses in industrial controllers, communication cards, and backplane switching architectures. The 8-bit width and bidirectional FET switch topology suit applications like SRAM bus sharing, FPGA I/O expansion, and multi-master bus arbitration designs.
What are the specifications of SN74CBT3383CDGVRE4?
| Pbfree Code | Yes |
| YTEOL | 0 |
| Control Type | ENABLE LOW |
| Count Direction | BIDIRECTIONAL |
| Family | CBT/FST/QS/5C/B |
| JESD-30 Code | R-PDSO-G24 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS EXCHANGER |
| Number of Bits | 2 |
| Number of Functions | 5 |
| Number of Ports | 4 |
| Output Characteristics | 3-STATE |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP24,.25,16 |
| 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 | 0.15ns |
| Propagation Delay (tpd) | 0.24ns |
| 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 | 0.4mm |
| 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 SN74CBT3383CDGVRE4 datasheet?
SN74CBT3383CDGVRE4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN74CBT3383CDGVRE4?
Compatible alternatives and drop-in replacements for SN74CBT3383CDGVRE4:
Bus Exchanger, CBT/FST/QS/5C/B Series, 5-Func, 2-Bit, True Output, CMOS, PDSO24
Frequently Asked Questions
What load capacitance does each channel of the SN74CBT3383CDGVRE4 support and how does it affect signal integrity?
Each channel of the SN74CBT3383CDGVRE4 is rated for a 50 pF load capacitance, which is sufficient for most digital bus lines with standard PCB trace lengths under 10 cm. Exceeding this capacitance causes slower edge rates, potentially violating setup-and-hold times in high-frequency bus systems operating above 50 MHz.
How does the dual-supply design of the SN74CBT3383CDGVRE4 support mixed 3.3 V and 5 V bus interfacing?
The SN74CBT3383CDGVRE4 accepts independent VCCA and VCCB supply voltages, allowing A-side signals at 3.3 V and B-side signals at 5 V to pass through the FET switch without voltage translation. This makes it directly compatible with 3.3 V MCU buses driving 5 V TTL-level peripherals without pull-up resistors or level shifters on the 8 data lines.
For an FPGA I/O expansion design, when does the SN74CBT3383CDGVRE4 outperform a standard bidirectional buffer?
Unlike active bidirectional buffers that add 3-5 ns propagation delay, the SN74CBT3383CDGVRE4 FET switch introduces near-zero delay, preserving timing margins in FPGA designs operating at 100 MHz or above. For 8-bit wide bus expansion where transparent switching and minimal delay skew across all 8 channels are required, the CBT3383 is the preferred solution.
What is the active-low enable logic on SN74CBT3383CDGVRE4 and how is it used in bus sharing designs?
The OE# active-low enable pin connects all 8 bidirectional FET switches simultaneously when pulled low, and isolates them in a high-impedance state when pulled high. This allows a single GPIO pin to grant or deny bus access, enabling simple 2-master bus arbitration where one master holds OE# low while the other's bus switch is disabled.
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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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