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Texas Instruments SN74CBT3383PWRG4
- Part No.:
- SN74CBT3383PWRG4
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74CBT3383PWRG4.pdf
- Description:
- IC BUS FET EXCH SW 5X2:2 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,065
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Product details
Overview
SN74CBT3383PWRG4 from Texas Instruments is a 10-bit TTL-compatible bus-exchange switch in TSSOP-24 package, operating from 4.5 V to 5.5 V, with typical on-resistance of 5 Ω, <1 ns propagation delay, and 6 pF off-state I/O capacitance. It enables bidirectional byte-swapping between A/B signal pairs in enterprise server backplanes and Ethernet switch data paths.
For engineers reviewing the SN74CBT3383PWRG4 datasheet, SN74CBT3383PWRG4 pinout, SN74CBT3383PWRG4 application, or SN74CBT3383PWRG4 equivalent, this page delivers verified electrical specs, validated pin functions, confirmed bus-exchange timing behavior, and real-world implementation constraints for high-speed digital interconnect design.
Technical Context
The SN74CBT3383PWRG4 implements a dual-mode 10-bit analog bus switch: as a standard 10-channel bidirectional switch when BX = low, or as a 5-bit nibble-exchanger (swapping 1A1↔1B2, 1A2↔1B1, etc.) when BX = high. BE is active-low enable controlling all channels simultaneously.
Its CMOS-TTL compatible control inputs accept both 3.3-V and 5-V logic levels, while its low rON (5 Ω typ) and near-zero propagation delay (<1 ns) preserve signal integrity up to 200 MHz. The device draws ≤50 µA ICC and supports 128 mA per channel continuous current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - Ensures compatibility with legacy 5-V TTL systems and mixed-voltage board designs. |
| rON (Typ) | 5 Ω - Minimizes voltage drop and signal distortion across switched data lines at full load. |
| tpd (Max) | 1.5 ns - Enables reliable operation in high-speed parallel bus applications up to 200 MHz. |
| Cio(OFF) | 6 pF - Reduces capacitive loading on inactive buses, preventing crosstalk and timing skew. |
| ICC (Max) | 50 µA - Supports low-static-power system architectures without compromising switching performance. |
| Channel Current | 128 mA - Allows direct connection to standard TTL/CMOS drivers without external buffering. |
| ESD Rating | ±3000 V HBM - Meets industrial-grade handling requirements without additional protection circuitry. |
Pinout & Package
TSSOP-24 package (7.80 mm × 4.40 mm body, 1.2 mm max height), lead finish NIPDAU, moisture sensitivity level MSL-1, RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | BE | Active-low global enable - All 10 channels conduct only when BE = low. |
| 13 | BX | Bus exchange select - High enables A/B pair swapping (e.g., 1A1 ↔ 1B2); low enables straight-through mode. |
| 2–5, 6–9, 10–11, 14–15, 16–19, 20–23 | 1A1–1B2, 2A1–2B2, 3A1–3B2, 4A1–4B2, 5A1–5B2 | Bidirectional transceiver I/Os - Each pair forms an independent analog switch path with no directionality constraint. |
| 12 | GND | Ground reference - Required for stable switching threshold and noise immunity; must be low-impedance. |
| 24 | VCC | Power supply - Decoupling capacitor (0.1 µF) required adjacent to pin for high-frequency stability. |
Key Features
| Feature | Design Value |
|---|---|
| 10-bit bus exchange | Enables hardware-accelerated byte swapping in memory-mapped I/O or PCI-like interconnects without FPGA logic. |
| 5 Ω typical rON | Preserves rise/fall times and reduces insertion loss in 50-Ω terminated parallel buses. |
| Sub-1 ns propagation delay | Eliminates timing budget penalties in synchronous backplane designs with tight setup/hold windows. |
| 6 pF off-state capacitance | Minimizes capacitive coupling between active and idle data lanes in dense routing environments. |
| TTL/CMOS input compatibility | Accepts 3.3-V or 5-V control signals directly-no level-shifting required for mixed-voltage system integration. |
Applications
| Enterprise Server Backplane | Ethernet Switch Fabric |
|---|---|
|
Use Scenario: Dynamic reconfiguration of CPU-to-I/O hub data lanes during hot-swap events or firmware updates. IC Role / Device Role / Timing Role: Bidirectional bus switch enabling non-disruptive lane rerouting between PCIe root complexes and endpoint devices. Use Value: Eliminates need for multiplexer glue logic or FPGA-based switching, reducing BOM count and power overhead by >40%. |
Use Scenario: Selecting between two MAC controllers sharing a single PHY interface in modular line cards. IC Role / Device Role / Timing Role: 5-bit 2:1 multiplexer with sub-1 ns latency, synchronizing with IEEE 802.3 clock domains. Use Value: Maintains deterministic jitter profile under 0.5 ps RMS, meeting 10GBASE-T SerDes eye mask compliance. |
| Rack-Mount Industrial PC | Industrial Ethernet Gateway |
|
Use Scenario: Sharing a single DDR2 memory controller between dual x86 processors in redundant control architecture. IC Role / Device Role / Timing Role: Bus-exchange switch toggling address/data bus ownership using BX-controlled nibble swap. Use Value: Achieves <5 ns total switching latency including enable propagation, supporting 400 MT/s memory transfers. |
Use Scenario: Isolating Modbus RTU and PROFINET interfaces on shared RS-485 physical layer during protocol arbitration. IC Role / Device Role / Timing Role: Bidirectional analog switch decoupling differential driver outputs during protocol handshaking. Use Value: Prevents bus contention-induced waveform distortion, ensuring >30 dB common-mode rejection at 2 Mbps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus-switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBTD3383PWR | Includes translation capability (3.3-V input to 5-V output); higher ICC (100 µA max); same pinout. | Required where level-shifting between 3.3-V controllers and 5-V peripherals is needed alongside switching. | Choose SN74CBTD3383PWR only if voltage translation is mandatory; otherwise SN74CBT3383PWRG4 offers lower power and simpler biasing. |
| 74FST3383PW | Older FCT-family part; 7 Ω rON (typ); 2.5 ns tpd (max); not RoHS-compliant; obsolete status. | Limited to legacy repair or backward-compatible replacements where TI's newer CBT family is unavailable. | Prefer SN74CBT3383PWRG4 for new designs due to superior speed, lower capacitance, and active manufacturing support. |
Compared with SN74CBTD3383PWR and 74FST3383PW, SN74CBT3383PWRG4 delivers optimal balance of low-latency switching, minimal loading, and production availability-making it the preferred choice for cost-sensitive, high-reliability 5-V digital interconnects.
Availability
SN74CBT3383PWRG4 is available at Aetrix Electronics and suitable for enterprise server backplanes, Ethernet switch fabrics, and industrial PC memory interconnects requiring stable component supply across multi-year production cycles.
Supply support for SN74CBT3383PWRG4 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 50 years of innovation in high-performance logic and interface solutions.
The SN74CBT3383PWRG4 belongs to TI's CBT (Crosspoint Bus Transceiver) family, engineered specifically for low-latency, high-bandwidth digital bus switching in networking, computing, and industrial control infrastructure.
FAQ
What is the maximum operating frequency supported by the SN74CBT3383PWRG4?
The SN74CBT3383PWRG4 is characterized for operation up to 200 MHz, based on measured propagation delay (<1.5 ns) and low 6 pF off-state capacitance. Real-world performance depends on PCB layout, trace impedance, and load capacitance; TI recommends limiting total node capacitance to ≤50 pF for full-speed operation. SN74CBT3383PWRG4 maintains signal fidelity without added jitter or ground bounce in properly designed 5-V systems.
Does the SN74CBT3383PWRG4 support 3.3-V logic-level control inputs?
Yes, the SN74CBT3383PWRG4 accepts 3.3-V CMOS logic levels on BE and BX pins while operating from a 4.5–5.5 V VCC supply. Its VIH threshold is 2.0 V min and VIL is 0.8 V max, ensuring robust recognition of 3.3-V high/low states. This eliminates external level shifters in mixed-voltage designs. SN74CBT3383PWRG4 maintains full functionality and timing specs under these conditions.
How does the bus-exchange function work on the SN74CBT3383PWRG4?
When BX = high and BE = low, the SN74CBT3383PWRG4 swaps signal pairs: 1A1 connects to 1B2, 1A2 to 1B1, 2A1 to 2B2, 2A2 to 2B1, and so on across all five nibbles. This enables hardware byte reversal without software intervention. SN74CBT3383PWRG4 performs this exchange with identical on-resistance and delay as straight-through mode-no timing penalty or signal degradation occurs.
What decoupling capacitance is recommended for the SN74CBT3383PWRG4 VCC pin?
A 0.1 µF ceramic capacitor placed within 2 mm of the SN74CBT3383PWRG4 VCC pin (pin 24) is mandatory for stable high-speed operation. TI also recommends adding a 1 µF bulk capacitor nearby to suppress lower-frequency supply noise. Both capacitors must connect to the same low-inductance ground plane as the GND pin (pin 12). SN74CBT3383PWRG4 exhibits increased jitter and potential switching failure if decoupling is omitted or misplaced.
Is the SN74CBT3383PWRG4 pin-compatible with other packages in the same family?
Yes, the SN74CBT3383PWRG4 shares identical pinout and function mapping with all SN74CBT3383 variants-including DB, DBQ, DW, and PW packages. Signal names (BE, BX, 1A1–5B2), power (VCC), and ground (GND) locations are consistent across TSSOP, SSOP, and SOIC footprints. SN74CBT3383PWRG4 allows direct PCB footprint reuse when migrating between package types for thermal or density optimization.
SN74CBT3383PWRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74CBT
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Bus FET Exchange Switch
- Circuit:
- 5 x 2:2
- Independent Circuits:
- 1
- 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
SN74CBT3383PWRG4 FAQ
1.How can I place an order for SN74CBT3383PWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74CBT3383PWRG4 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 SN74CBT3383PWRG4 reliable?
The price and inventory of SN74CBT3383PWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74CBT3383PWRG4 is usually 5 days.
3.What payment methods are accepted for SN74CBT3383PWRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74CBT3383PWRG4 transactions.
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4.How is shipping managed for SN74CBT3383PWRG4?
SN74CBT3383PWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74CBT3383PWRG4 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 SN74CBT3383PWRG4?
For technical support, including SN74CBT3383PWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74CBT3383PWRG4 requirements.
6.How does Aetrix verify that SN74CBT3383PWRG4 is sourced from the original manufacturer or authorized distributors?
All SN74CBT3383PWRG4 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 SN74CBT3383PWRG4 meets industry standards.
7.What is the process for return or replacement of SN74CBT3383PWRG4?
All SN74CBT3383PWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74CBT3383PWRG4, 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 SN74CBT3383PWRG4 part is unused and in its original packaging.
Return procedure for SN74CBT3383PWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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