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Texas Instruments SN74CBTK6800PWR
- Part No.:
- SN74CBTK6800PWR
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74CBTK6800PWR.pdf
- Description:
- IC BUS SWITCH 10 X 1:1 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,272
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Product details
Overview
SN74CBTK6800PWR from Texas Instruments is a 10-bit FET bus switch with precharged outputs and active-clamp undershoot protection, designed for high-speed TTL-compatible signal routing in hot-swap and live-insertion systems. It features 5-Ω on-state resistance, bidirectional switching, power-off output disable, and clamps I/O undershoots down to –2 V. Used in backplane interconnects and modular computing systems requiring robust signal integrity during insertion.
For engineers reviewing the SN74CBTK6800PWR datasheet, SN74CBTK6800PWR pinout, SN74CBTK6800PWR application, or SN74CBTK6800PWR equivalent, key selection criteria include its 24-pin TSSOP package, BIASV-controlled precharge, active undershoot clamp circuitry, latch-up immunity (>100 mA), and ESD ratings (2000-V HBM, 200-V MM, 1000-V CDM).
Technical Context
The SN74CBTK6800PWR implements a single-enable 10-bit FET switch architecture where ON = low enables bidirectional A↔B conduction with near-zero propagation delay (0.25 ns typical at 5 V). Its internal bias network precharges B-port outputs to a user-supplied BIASV voltage via ~10-kΩ equivalent resistance when disabled or powered off.
Each I/O includes an active-clamp undershoot-protection circuit that sources current from VCC to limit negative transients to –2 V, preventing pass-transistor turn-on during live insertion. The device meets JESD 78 Class II latch-up performance and supports 4 V to 5.5 V VCC operation with TTL-compatible control thresholds (VIL ≤ 0.8 V, VIH ≥ 2 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-state resistance (ron) | 3–7 Ω typical - ensures minimal voltage drop and signal attenuation across switched paths. |
| Propagation delay (tpd) | 0.25 ns at VCC = 5 V - enables high-speed data transfer without timing skew in parallel buses. |
| Undershoot clamp threshold | –2 V - actively limits negative transients to prevent false triggering or damage during hot-plug events. |
| BIASV range | 1.3 V to VCC - allows flexible precharge level selection to match system logic thresholds and reduce noise. |
| ESD protection | 2000-V HBM, 200-V MM, 1000-V CDM - provides robust handling during board assembly and field service. |
| Latch-up immunity | >100 mA per JESD 78 Class II - guarantees safe operation under transient overcurrent conditions. |
| Operating temperature | –40°C to +85°C - supports industrial-grade reliability in embedded and telecom equipment. |
Pinout & Package
TSSOP-24 (PW) package: 7.9 mm × 4.5 mm × 1.2 mm max height, lead pitch 0.65 mm, RoHS-compliant NIPDAU finish, MSL Level-1 (unlimited reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ON (Pin 1) | Enable control input | Active-low switch enable; drives A↔B connection when low, disables and precharges B port when high or VCC = 0 V. |
| A1–A10 (Pins 2–11) | Input/Output port A | Bidirectional signal path; connects to upstream logic or controller side of bus interface. |
| GND (Pin 12) | Ground reference | Primary return path for VCC and BIASV supplies; critical for undershoot clamp current sinking. |
| VCC (Pin 13) | Power supply | 4 V to 5.5 V supply powering switch core, clamp circuitry, and precharge bias generation. |
| B1–B10 (Pins 14–23) | Input/Output port B | Bidirectional signal path; connects to downstream module or hot-swappable card side of bus. |
| BIASV (Pin 24) | Bias voltage input | User-supplied voltage (1.3 V to VCC) setting precharge level for B-port outputs during disable/power-off. |
Key Features
| Feature | Design Value |
|---|---|
| Precharged B-port outputs | Reduces live-insertion noise by holding B-side signals near valid logic levels before connection, minimizing bus glitches. |
| Active-clamp undershoot protection | Sources VCC current to clamp I/O undershoots to –2 V, eliminating need for external Schottky diodes or RC networks. |
| Power-off output disable | Ensures high-impedance isolation of both ports when VCC = 0 V, enabling true live insertion without backfeeding. |
| TTL-compatible control inputs | Accepts standard 0.8 V / 2.0 V logic thresholds, simplifying interface with legacy microcontrollers and FPGA I/O banks. |
| Low on-state resistance | 3–7 Ω typical minimizes resistive loss and maintains signal rise/fall times across full 10-bit bus width. |
Applications
| Modular Backplane Interconnect | Hot-Swappable Server Blade |
|---|---|
Use Scenario: Connecting CPU/memory modules to shared backplane buses in telecom chassis where cards are inserted/removed while powered. IC Role / Device Role / Timing Role: Bidirectional bus switch isolating blade-side signals from backplane during insertion; precharges B-port to suppress ground bounce. Use Value: Eliminates bus contention and signal distortion during hot-swap, verified by <5 ns enable/disable times and –2 V undershoot clamping. | Use Scenario: Enabling PCIe or SATA lane routing between server motherboard and pluggable compute/storage blades. IC Role / Device Role / Timing Role: Signal path gatekeeper managing data flow direction and voltage domain translation between host and peripheral. Use Value: Maintains sub-nanosecond timing integrity across 10-bit lanes while surviving repeated –2 V transients per JEDEC test conditions. |
| Industrial PLC I/O Expansion | Test Equipment Modular Interface |
Use Scenario: Adding isolated digital I/O modules to programmable logic controllers in factory automation systems. IC Role / Device Role / Timing Role: Bus isolation device decoupling field-side I/O from controller-side logic, supporting live firmware updates. Use Value: Prevents latch-up during field wiring errors via >100 mA JESD 78 Class II rating and eliminates need for external protection diodes. | Use Scenario: Configurable signal routing in automated test equipment where instrument modules are swapped mid-test sequence. IC Role / Device Role / Timing Role: Reconfigurable signal bridge enabling dynamic assignment of DIO, SPI, or parallel bus lines to different measurement channels. Use Value: Enables glitch-free reconfiguration using TTL-level ON control and 0.25 ns propagation delay for synchronized multi-channel sampling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar FET bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT16210PVR | 16-bit, no BIASV pin or active undershoot clamp; relies on passive clamping only. | Suitable for non-hot-swap applications where undershoot risk is low and wider bus width is required. | Select when higher channel count outweighs need for active undershoot protection and precharge control. |
| SN74LVC1G3157DCKR | Single-pole double-throw analog switch, 5-V tolerant, no precharge or undershoot clamp circuitry. | Used for low-pin-count signal routing in portable devices, not for 10-bit parallel bus isolation. | Choose only for point-to-point signal gating, not for multi-bit bus switching with live-insertion requirements. |
Compared with SN74CBTK6800PWR, SN74CBT16210PVR offers more bits but lacks BIASV control and active undershoot clamping-critical for hot-swap safety-while SN74LVC1G3157DCKR is functionally incompatible for 10-bit parallel routing due to single-channel architecture and missing precharge functionality.
Availability
SN74CBTK6800PWR is available at Aetrix Electronics and suitable for industrial PLC expansion, telecom backplane interconnect, and modular test equipment requiring stable component supply across extended product lifecycles.
Supply support for SN74CBTK6800PWR 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.
The SN74CBTK6800PWR belongs to TI's CBTK-series FET bus switches, engineered specifically for high-reliability hot-swap and live-insertion applications in modular electronic systems.
FAQ
What is the maximum undershoot voltage the SN74CBTK6800PWR can safely clamp?
The SN74CBTK6800PWR actively clamps I/O undershoots to –2 V, as confirmed by absolute maximum ratings and undershoot characterization tests in the datasheet. This clamping action prevents pass-transistor turn-on during live insertion events and eliminates the need for external protection components. The SN74CBTK6800PWR achieves this using internal VCC-sourced current paths integrated into each I/O terminal.
Does the SN74CBTK6800PWR require external pull-up or pull-down resistors on its control inputs?
No, the SN74CBTK6800PWR does not require external pull-up or pull-down resistors on the ON input because its TTL-compatible input thresholds (VIH ≥ 2 V, VIL ≤ 0.8 V) allow direct interfacing with standard logic families. However, TI recommends tying all unused control inputs to VCC or GND per application note SCBA004 to prevent floating nodes and ensure deterministic operation. This applies to the SN74CBTK6800PWR's single ON pin.
Can the SN74CBTK6800PWR operate with a 3.3-V supply?
No, the SN74CBTK6800PWR is not rated for 3.3-V operation. Its recommended operating VCC range is 4 V to 5.5 V, and absolute maximum VCC is 7 V. Operating below 4 V may result in undefined on-resistance, degraded undershoot clamping, or failure to meet TTL input thresholds. For 3.3-V systems, alternative bus switches such as the SN74CBTLV3245 must be evaluated-not the SN74CBTK6800PWR.
How does the BIASV pin function during power-off conditions in the SN74CBTK6800PWR?
When VCC = 0 V, the SN74CBTK6800PWR's B-port outputs are precharged to the externally supplied BIASV voltage through an internal ~10-kΩ equivalent resistor. This feature holds B-side signals at a known logic level during live insertion, minimizing ground bounce and bus contention. The SN74CBTK6800PWR maintains this precharge state regardless of ON pin state when VCC is absent, ensuring safe module insertion.
Is the SN74CBTK6800PWR pin-compatible with other packages in the same family?
Yes, the SN74CBTK6800PWR shares identical pinout and function mapping with SN74CBTK6800DBQR (SSOP), SN74CBTK6800DWR (SOIC), and SN74CBTK6800DGVR (TVSOP), as confirmed by the common top-side marking "CBTK6800" or "BK6800" and identical pin diagrams across package variants. All variants use the same 24-pin configuration with ON, A1–A10, GND, VCC, B1–B10, and BIASV assignments-making the SN74CBTK6800PWR a drop-in replacement in TSSOP footprint designs.
SN74CBTK6800PWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74CBTK
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-TSSOP
SN74CBTK6800PWR FAQ
1.How can I place an order for SN74CBTK6800PWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74CBTK6800PWR 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 SN74CBTK6800PWR reliable?
The price and inventory of SN74CBTK6800PWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74CBTK6800PWR is usually 5 days.
3.What payment methods are accepted for SN74CBTK6800PWR?
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SN74CBTK6800PWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74CBTK6800PWR 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 SN74CBTK6800PWR?
For technical support, including SN74CBTK6800PWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74CBTK6800PWR requirements.
6.How does Aetrix verify that SN74CBTK6800PWR is sourced from the original manufacturer or authorized distributors?
All SN74CBTK6800PWR 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 SN74CBTK6800PWR meets industry standards.
7.What is the process for return or replacement of SN74CBTK6800PWR?
All SN74CBTK6800PWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74CBTK6800PWR, 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 SN74CBTK6800PWR part is unused and in its original packaging.
Return procedure for SN74CBTK6800PWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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