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Texas Instruments SN74CBTK6800DGVR
- Part No.:
- SN74CBTK6800DGVR
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 24-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74CBTK6800DGVR.pdf
- Description:
- IC BUS SWITCH 10 X 1:1 24TVSOP
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
SN74CBTK6800DGVR from Texas Instruments is a 10-bit FET bus switch with precharged outputs and active-clamp undershoot protection, designed for live-insertion applications in hot-swap backplanes and modular systems. It features 5-Ω on-state resistance, TTL-compatible inputs, and clamps I/O undershoots down to –2 V. The device operates from 4 V to 5.5 V and supports bidirectional signal routing between A and B ports under single ON control.
For engineers reviewing the SN74CBTK6800DGVR datasheet, SN74CBTK6800DGVR pinout, SN74CBTK6800DGVR application, or SN74CBTK6800DGVR equivalent, key selection criteria include live-insertion noise suppression via BIASV precharge, –2 V undershoot clamping capability, 0.25 ns typical propagation delay, and TVSOP-24 package compatibility with high-density PCB layouts.
Technical Context
The SN74CBTK6800DGVR implements a single 10-bit analog switch array using low-threshold FETs, enabling near-zero propagation delay and bidirectional signal flow. Its ON input controls conduction state: low enables A↔B connection; high disables switching and precharges B-port outputs to BIASV through an internal ~10-kΩ path.
An integrated active-clamp circuit supplies current from VCC during I/O undershoot events, preventing pass-transistor turn-on and maintaining signal integrity. Latch-up immunity exceeds 100 mA per JESD 78 Class II, and ESD protection meets 2000-V HBM, 200-V MM, and 1000-V CDM standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-state resistance (ron) | 3 Ω to 7 Ω - Enables minimal voltage drop and signal attenuation across A/B ports at 30–64 mA load currents. |
| Propagation delay (tpd) | 0.25 ns at VCC = 5 V - Supports high-speed data transfer without timing skew in parallel bus architectures. |
| Undershoot clamp threshold | –2 V - Actively limits negative transients below GND to prevent damage and false logic states during hot-plug events. |
| BIASV range | 1.3 V to VCC - Allows user-selectable precharge voltage to minimize live-insertion noise on B-port outputs. |
| Supply voltage (VCC) | 4 V to 5.5 V - Matches standard 5-V TTL/CMOS system rails while ensuring robust operation across industrial temperature range. |
| Input leakage (II) | ±5 µA - Ensures negligible loading on upstream drivers and stable logic-level interpretation of ON control signal. |
| Off-state capacitance (Co(OFF)) | 8.5 pF - Reduces capacitive coupling and crosstalk when switch is disabled, preserving signal integrity in adjacent traces. |
Pinout & Package
SN74CBTK6800DGVR is housed in a 24-pin TVSOP (DGV) package, 4.4 mm × 5.0 mm footprint, 1.2 mm max height, with 0.5 mm pitch and exposed thermal pad. Pin 1 index located at top-left corner (Q1 quadrant), compliant with JEDEC MO-153.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ON | Active-low enable input | Drives switch ON when low (≤0.8 V); places B port in high-Z and precharges to BIASV when high (≥2 V). |
| A1–A10 | Input/output port A | Bidirectional signal terminals connected directly to switch FET sources; tolerate –0.5 V to 7 V. |
| B1–B10 | Input/output port B | Bidirectional signal terminals connected to switch FET drains; precharged to BIASV when ON is high. |
| VCC | Positive supply | Provides power for internal logic, active-clamp circuitry, and precharge current path (4 V to 5.5 V). |
| GND | Ground reference | Common return for VCC, BIASV, and undershoot clamp current sink; required for latch-up immunity. |
| BIASV | User-defined precharge bias | Sets B-port DC level during disable state; must be ≥1.3 V and ≤VCC to ensure proper clamp operation. |
Key Features
| Feature | Design Value |
|---|---|
| Precharged B-port outputs | Reduces live-insertion noise by holding B-side signals at stable BIASV voltage instead of floating, eliminating glitches during card insertion. |
| Active-clamp undershoot protection | Supplies VCC-sourced current to clamp I/O undershoots to –2 V, preventing parasitic turn-on of downstream FETs and avoiding system reset or data corruption. |
| Power-off high-impedance outputs | Ensures A/B ports enter high-Z state when VCC = 0 V, enabling safe hot-swap operation without back-driving powered subsystems. |
| TTL-compatible control input | Accepts standard 0.8 V / 2.0 V VIH/VIL thresholds, eliminating need for level-shifting circuitry when interfacing with legacy 5-V logic controllers. |
| Low on-resistance (5 Ω typ) | Minimizes IR drop and signal distortion across full 10-bit bus, supporting clean transmission of fast-edge digital signals up to 100+ MHz. |
Applications
| Modular Backplane Systems | Hot-Swappable I/O Cards |
|---|---|
|
Use Scenario: Inserting/removing daughter cards into a powered backplane without disrupting communication on other slots. IC Role / Device Role / Timing Role: Bidirectional bus switch isolating card-local data lines from shared backplane bus during insertion/removal. Use Value: Precharged B-port and –2 V undershoot clamping eliminate transient noise and false logic transitions that would otherwise corrupt adjacent slot traffic. |
Use Scenario: Replacing field-serviceable interface modules (e.g., RS-232, CAN, USB) in industrial PLCs while main controller remains operational. IC Role / Device Role / Timing Role: Signal isolation gate enabling safe disconnection of peripheral I/O paths without powering down the host CPU or memory bus. Use Value: Power-off high-Z behavior prevents backfeeding into powered subsystems; 5-Ω ron ensures minimal latency when reconnected. |
| Telecom Line Card Interfaces | Test Equipment Signal Routing |
|
Use Scenario: Protecting sensitive line interface ICs (e.g., SLICs, CODECs) from voltage transients induced during plug-in of telecom modules. IC Role / Device Role / Timing Role: Front-end protection switch placed between connector and PHY, absorbing undershoot before it reaches analog front-end components. Use Value: Active-clamp circuit limits undershoot to –2 V-below the absolute minimum rating of most telecom PHYs-preventing latch-up or parametric shift. |
Use Scenario: Multiplexing DUT signals to measurement instruments (oscilloscopes, logic analyzers) in automated test fixtures where probe contact order is uncontrolled. IC Role / Device Role / Timing Role: Low-distortion signal path selector that maintains signal fidelity across multiple DUT channels without adding jitter or skew. Use Value: 0.25 ns tpd and 8.5 pF Co(OFF) preserve edge integrity and minimize crosstalk during channel switching, critical for high-speed digital validation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar FET bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT16210DGGR | 12-bit, dual 6-bit configuration; no BIASV pin or active-clamp circuit; higher ron (6–12 Ω). | Lacks precharge and undershoot protection; suitable only for non-live-insertion, lower-speed bus isolation. | Select when cost or channel count outweighs transient robustness requirements and board space allows larger SSOP-48 package. |
| SN74LVC1G3157DCKR | Single-pole double-throw (SPDT) switch; 3.3-V only; no BIASV or undershoot clamp; 6 Ω ron. | Not scalable to 10-bit parallel buses; limited to point-to-point signal routing in 3.3-V domains. | Choose for low-pin-count, low-voltage signal gating where live-insertion is not required and density favors SC70-6 footprint. |
Compared with SN74CBTK6800DGVR, SN74CBT16210DGGR offers more bits but sacrifices live-insertion safety features, while SN74LVC1G3157DCKR provides compact size and 3.3-V compatibility at the expense of parallel bus support and transient resilience.
Availability
SN74CBTK6800DGVR is available at Aetrix Electronics and suitable for modular backplane systems, hot-swappable I/O cards, and telecom line card interfaces requiring stable component supply, long-term lifecycle assurance, and consistent TVSOP-24 packaging.
Supply support for SN74CBTK6800DGVR 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 decades of expertise in high-reliability interface solutions.
The SN74CBTK6800DGVR belongs to TI's 74CBT family of advanced bus switches, engineered specifically for hot-swap and live-insertion applications in telecom, industrial automation, and modular computing infrastructure.
FAQ
What is the maximum undershoot voltage the SN74CBTK6800DGVR can safely clamp?
The SN74CBTK6800DGVR actively clamps I/O undershoots down to –2 V, as verified under standardized test conditions (VCC = 5.5 V, tr/tf = 2 ns, tw = 20 ns). This clamping action draws current from VCC to hold the output at –2 V, preventing deeper excursions that could trigger latch-up or damage downstream components. The SN74CBTK6800DGVR achieves this without external components, making it ideal for protecting sensitive interfaces during hot-plug events.
Does the SN74CBTK6800DGVR require an external pull-up or pull-down on the ON pin?
No, the SN74CBTK6800DGVR does not require external biasing on the ON pin. Its TTL-compatible input accepts VIH ≥ 2 V and VIL ≤ 0.8 V over the full operating range, and internal circuitry ensures stable logic interpretation without external resistors. However, TI recommends tying unused control inputs to VCC or GND per application report SCBA004 to avoid floating states that may increase ICC or cause erratic switching behavior in the SN74CBTK6800DGVR.
Can the SN74CBTK6800DGVR operate with BIASV set to 0 V (GND)?
No-BIASV must be between 1.3 V and VCC per the recommended operating conditions. Setting BIASV = 0 V violates the minimum specification and disables the precharge function, leaving B-port outputs floating during disable state. This defeats the core live-insertion benefit of the SN74CBTK6800DGVR and risks noise-induced glitches. For GND-referenced precharge, use BIASV = 1.3 V minimum, aligned with system logic thresholds.
What is the thermal performance of the SN74CBTK6800DGVR in its TVSOP package?
The SN74CBTK6800DGVR in the TVSOP-24 (DGV) package has a junction-to-ambient thermal impedance (θJA) of 86°C/W, measured per JESD 51-7. Under typical 5-V operation with all 10 switches conducting 30 mA each, total power dissipation remains below 15 mW, resulting in negligible junction temperature rise. The exposed thermal pad in the DGV package supports optional PCB copper pour for enhanced heat spreading if used in high-density or thermally constrained layouts involving the SN74CBTK6800DGVR.
Is the SN74CBTK6800DGVR compatible with 3.3-V logic systems?
The SN74CBTK6800DGVR is specified for VCC = 4 V to 5.5 V and is not rated for 3.3-V operation. While some marginal functionality may occur at 3.3 V, parameters like ron (increasing to >10 Ω), tpd (degrading beyond spec), and undershoot clamp depth (weakening below –2 V) fall outside guaranteed limits. For 3.3-V systems, TI recommends alternatives such as SN74LVC1G3157 or SN74AUC2G66-not the SN74CBTK6800DGVR-which are fully characterized and warranted at 3.3 V.
SN74CBTK6800DGVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74CBTK
- Package/Case:
- 24-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- Type:
- Bus Switch
- Circuit:
- 10 x 1:1
- 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-TVSOP
SN74CBTK6800DGVR FAQ
1.How can I place an order for SN74CBTK6800DGVR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74CBTK6800DGVR 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 SN74CBTK6800DGVR reliable?
The price and inventory of SN74CBTK6800DGVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74CBTK6800DGVR is usually 5 days.
3.What payment methods are accepted for SN74CBTK6800DGVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74CBTK6800DGVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74CBTK6800DGVR?
SN74CBTK6800DGVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74CBTK6800DGVR 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 SN74CBTK6800DGVR?
For technical support, including SN74CBTK6800DGVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74CBTK6800DGVR requirements.
6.How does Aetrix verify that SN74CBTK6800DGVR is sourced from the original manufacturer or authorized distributors?
All SN74CBTK6800DGVR 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 SN74CBTK6800DGVR meets industry standards.
7.What is the process for return or replacement of SN74CBTK6800DGVR?
All SN74CBTK6800DGVR units undergo pre-shipment inspection (PSI). If there is an issue with SN74CBTK6800DGVR, 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 SN74CBTK6800DGVR part is unused and in its original packaging.
Return procedure for SN74CBTK6800DGVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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