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Texas Instruments SN74CBTLV3383DBQR
- Part No.:
- SN74CBTLV3383DBQR
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
SN74CBTLV3383DBQR.pdf
- Description:
- IC BUS FET EXCHG SW 5X2:2 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,350
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Product details
Overview
SN74CBTLV3383DBQR from Texas Instruments is a low-voltage 10-bit FET bus-exchange switch operating from 2.3 V to 3.6 V supply, featuring 5 Ω typical on-state resistance, rail-to-rail signal switching, and Ioff partial-power-down protection. It functions as either a 10-bit bus switch or a 5-bit bus exchanger (A/B pair swapping), used in high-speed data routing for rack servers and communication boards.
For engineers reviewing the SN74CBTLV3383DBQR datasheet, SN74CBTLV3383DBQR pinout, SN74CBTLV3383DBQR application, or SN74CBTLV3383DBQR equivalent, key selection criteria include bidirectional signal integrity up to 200 MHz, sub-0.25 ns propagation delay at 3.3 V, isolation during power-off, and compatibility with 24-pin QSOP (DBQ) layout constraints.
Technical Context
The SN74CBTLV3383DBQR implements ten independent FET-based transmission gates controlled by two logic inputs: BE (active-low enable) and BX (bus-exchange select). When BE is low and BX is low, A1–A5 connect to B1–B5 respectively; when BX is high, A1–A5 swap to B2–B1, etc., per the function table. All I/O pins support rail-to-rail analog/digital signals and tolerate up to 4.6 V regardless of VCC.
Its Ioff specification limits leakage to 10 µA when VCC = 0 V and any I/O is biased 0–3.6 V, enabling safe back-drive isolation in partial-power-down systems. Thermal performance is characterized with RθJA = 86.6 °C/W for the DBQ package, supporting continuous operation from –40 °C to 85 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3 V to 3.6 V - Enables interoperability with 2.5 V and 3.3 V logic domains without level shifters. |
| ron (Typ) | 5 Ω at VCC = 3 V, II = 64 mA - Ensures minimal voltage drop and signal distortion in high-current data paths. |
| Propagation Delay | 0.15–0.25 ns at VCC = 2.5 V - Supports >200 MHz data rates with negligible timing skew across all 10 channels. |
| Ioff | 10 µA max at VCC = 0 V - Prevents damaging back-current flow during hot-swap or partial system power-down. |
| ESD Rating | ±2000 V HBM - Meets industrial-grade robustness requirements for board-level handling and field operation. |
| Signal Range | 0 V to VCC (rail-to-rail) - Allows full-swing analog or digital signal pass-through without clipping. |
| Max Channel Current | ±128 mA - Sustains peak transient loads in burst-mode memory or peripheral interfaces. |
Pinout & Package
SN74CBTLV3383DBQR uses a 24-pin QSOP (DBQ) package measuring 8.65 mm × 3.90 mm with 0.65 mm lead pitch. The package is RoHS-compliant, moisture sensitivity level 2 (260 °C, 1 year), and features gull-wing leads for surface-mount assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BE (Pin 1) | Active-low global enable | Drives all 10 switches into high-impedance state when high; required to be pulled up externally during power sequencing. |
| BX (Pin 13) | Bus-exchange mode control | Selects straight-through (BX = L) or swapped (BX = H) A/B signal mapping; no internal pullup/pulldown. |
| VCC (Pin 24) | Positive supply | Power source for internal FET biasing; must be decoupled with 0.1–10 µF ceramic capacitor near the pin. |
| GND (Pin 12) | Ground reference | Common return path for all I/O and supply currents; requires low-inductance connection to PCB ground plane. |
| A1–A5, B1–B5 (Pins 3–5, 7–9, 11, 14–15, 17–19, 21–23) | Bidirectional signal terminals | 10 pairs of fully symmetric I/O paths; each supports equal conduction in both directions with matched ron and capacitance. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional signal routing | Identical ron, CIO(OFF) = 13.5 pF, and tpd in both A→B and B→A directions - eliminates directionality constraints in multiplexed buses. |
| Rail-to-rail analog/digital switching | Operates with input/output voltages from 0 V to VCC - preserves full dynamic range for mixed-signal applications like sensor interface muxing. |
| Ioff-enabled partial-power-down | 10 µA max leakage at VCC = 0 V - allows safe integration into systems where subsystems power up/down asynchronously. |
| Low 5 Ω on-resistance | Minimizes insertion loss and voltage droop under 64 mA load - critical for maintaining signal integrity in DDR or PCIe trace routing. |
| Sub-0.25 ns propagation delay | Enables timing-critical interconnects in high-frequency clock distribution or data capture paths without added skew. |
Applications
| Gaming Console Memory Expansion | Rack Server PCIe Lane Multiplexing |
|---|---|
Use Scenario: Dynamic allocation of DDR3/DDR4 memory channels between CPU and GPU in modular gaming hardware. IC Role / Device Role / Timing Role: Bidirectional bus switch enabling real-time reconfiguration of memory address/data lines without protocol translation. Use Value: 5 Ω ron and 0.25 ns tpd preserve signal rise/fall times and eye diagram margins at 1600 MT/s data rates. | Use Scenario: Sharing limited PCIe x16 slots among multiple NICs, GPUs, or storage controllers in 1U/2U server chassis. IC Role / Device Role / Timing Role: Low-latency lane selector that routes differential PCIe Gen3 signals while maintaining impedance continuity. Use Value: Rail-to-rail operation supports common-mode voltage shifts across PCIe receivers; Ioff prevents backfeed during hot-plug events. |
| Industrial Communication Board Signal Routing | Test Equipment Digital Pattern Switching |
Use Scenario: Reconfigurable FPGA I/O expansion on EtherCAT or PROFINET interface cards requiring flexible PHY assignment. IC Role / Device Role / Timing Role: Bus-exchange function swaps A/B port pairs to redirect serial control lines (e.g., SPI, I²C) between multiple peripherals. Use Value: BX-controlled swapping eliminates need for external logic or firmware intervention; 2000 V HBM withstands factory ESD environments. | Use Scenario: Automated test fixture that routes digital stimulus patterns from one pattern generator to multiple DUTs sequentially. IC Role / Device Role / Timing Role: High-speed, low-distortion signal path selector with deterministic enable/disable timing (ten/tdis ≤ 6 ns). Use Value: 128 mA channel rating supports driving capacitive probe loads; 13.5 pF CIO(OFF) minimizes crosstalk during off-state isolation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus-switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBTLV3384DBQR | 8-bit configuration (vs. 10-bit); identical ron, VCC range, and Ioff spec; shares DBQ package footprint. | Suitable for narrower data buses (e.g., 8-bit microcontroller address latching) but lacks two channels for full 10-bit exchange. | Select when system requires fewer signal paths and board space is constrained - same layout reuse possible. |
| TS3V330DBQR | 3.3 V fixed supply only (no 2.3–3.6 V range); higher ron (7 Ω typ); supports 300 MHz max frequency. | Better suited for pure 3.3 V systems needing higher bandwidth, but incompatible with 2.5 V domains and offers less power-down safety margin. | Choose for speed-critical 3.3 V-only designs where 2.5 V interoperability and Ioff robustness are secondary. |
Compared with SN74CBTLV3384DBQR and TS3V330DBQR, the SN74CBTLV3383DBQR uniquely balances 10-bit channel count, wide supply flexibility, and industry-leading Ioff protection - making it optimal for mixed-voltage, hot-swap-capable infrastructure equipment.
Availability
SN74CBTLV3383DBQR is available at Aetrix Electronics and suitable for rack server interconnects, industrial communication boards, and gaming console memory expansion requiring stable component supply across extended product lifecycles.
Supply support for SN74CBTLV3383DBQR 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets.
The SN74CBTLV3383DBQR belongs to TI's CBTLV low-voltage bus-switch family, engineered for high-speed, low-distortion signal routing in power-aware digital systems where partial-power-down capability and rail-to-rail operation are mandatory.
FAQ
What is the maximum operating frequency supported by the SN74CBTLV3383DBQR?
The SN74CBTLV3383DBQR is tested and specified for reliable operation up to 200 MHz. This limit derives from its 0.15–0.25 ns propagation delay at 2.5 V and 0.25 ns at 3.3 V, combined with measured signal integrity under 128 mA load and 13.5 pF off-capacitance. Higher frequencies may be feasible in specific layouts but are not guaranteed by TI's characterization.
Does the SN74CBTLV3383DBQR require external pull-up resistors on control pins?
Yes - the BE pin (Pin 1) must be tied to VCC via an external pull-up resistor to ensure high-impedance state during power-up/power-down. TI recommends sizing based on driver sink capability; no pull-up is required on BX (Pin 13), which has no internal termination. The SN74CBTLV3383DBQR datasheet specifies this in Section 8.1 for reliable power sequencing.
Can the SN74CBTLV3383DBQR handle signals exceeding its VCC supply voltage?
Yes - the SN74CBTLV3383DBQR supports overvoltage-tolerant I/O: all signal pins (A1–A5, B1–B5) tolerate voltages from –0.5 V to 4.6 V regardless of VCC setting (2.3–3.6 V). This enables safe interfacing with 5 V legacy peripherals or fault conditions without clamping diodes or external protection.
How does the bus-exchange function work in the SN74CBTLV3383DBQR?
The SN74CBTLV3383DBQR performs bus exchange when BE = low and BX = high: A1 connects to B2, A2 to B1, A3 to B4, A4 to B3, and A5 to B5. This 5-pair swapping is implemented via internal FET routing and requires no additional logic. The function is detailed in Table 1 (Function Table) of the SN74CBTLV3383DBQR datasheet.
Is the SN74CBTLV3383DBQR pin-compatible with other packages in the same family?
No - the SN74CBTLV3383DBQR (QSOP-24) shares identical pinout and functionality with SN74CBTLV3383DGVR (TVSOP-24), SN74CBTLV3383DWR (SOIC-24), and SN74CBTLV3383PWR (TSSOP-24), but mechanical dimensions, thermal resistance, and soldering profiles differ. Layouts are not interchangeable without footprint revision.
SN74CBTLV3383DBQR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74CBTLV
- Package/Case:
- 24-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Bus FET Exchange Switch
- Circuit:
- 5 x 2:2
- Independent Circuits:
- 1
- Current - Output High, Low:
- -
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 2.3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SSOP
SN74CBTLV3383DBQR FAQ
1.How can I place an order for SN74CBTLV3383DBQR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74CBTLV3383DBQR 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 SN74CBTLV3383DBQR reliable?
The price and inventory of SN74CBTLV3383DBQR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74CBTLV3383DBQR is usually 5 days.
3.What payment methods are accepted for SN74CBTLV3383DBQR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74CBTLV3383DBQR transactions.
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4.How is shipping managed for SN74CBTLV3383DBQR?
SN74CBTLV3383DBQR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74CBTLV3383DBQR 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 SN74CBTLV3383DBQR?
For technical support, including SN74CBTLV3383DBQR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74CBTLV3383DBQR requirements.
6.How does Aetrix verify that SN74CBTLV3383DBQR is sourced from the original manufacturer or authorized distributors?
All SN74CBTLV3383DBQR 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 SN74CBTLV3383DBQR meets industry standards.
7.What is the process for return or replacement of SN74CBTLV3383DBQR?
All SN74CBTLV3383DBQR units undergo pre-shipment inspection (PSI). If there is an issue with SN74CBTLV3383DBQR, 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 SN74CBTLV3383DBQR part is unused and in its original packaging.
Return procedure for SN74CBTLV3383DBQR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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