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Texas Instruments SN74CBTS6800DW
- Part No.:
- SN74CBTS6800DW
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74CBTS6800DW.pdf
- Description:
- IC BUS SWITCH 10 X 1:1 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:15,475
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Product details
Overview
SN74CBTS6800DW from Texas Instruments is a 10-bit FET bus switch with precharged outputs and Schottky diode clamping, designed for high-speed TTL-compatible bidirectional signal routing in live-insertion systems. It features 5-Ω on-state resistance, 0.25 ns typical propagation delay (VCC = 4 V), and BIASV-controlled precharge to minimize noise during hot-swap events. Used in backplane interconnects and modular computing systems requiring glitch-free port isolation.
For engineers reviewing the SN74CBTS6800DW datasheet, SN74CBTS6800DW pinout, SN74CBTS6800DW application, or SN74CBTS6800DW equivalent, key selection criteria include on-resistance matching, BIASV biasing flexibility, Schottky undershoot clamping to –2 V, live-insertion noise suppression, and SOIC-DW thermal performance (θJA = 46°C/W).
Technical Context
The SN74CBTS6800DW implements a single-enable 10-bit FET switch architecture with independent A↔B bidirectional conduction paths. Its low on-resistance (3–7 Ω) and near-zero propagation delay stem from optimized FET channel design, not buffered logic.
Precharge functionality is implemented via internal 10-kΩ-equivalent resistive pull-up to user-supplied BIASV (1.3 V to VCC), active when ON is high or VCC = 0 V. Schottky diodes are integrated directly at each I/O terminal to clamp negative transients up to –2 V without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-state resistance (ron) | 3–7 Ω - Enables minimal voltage drop and signal integrity across A/B ports at ≤64 mA per channel. |
| Propagation delay (tpd) | 0.25 ns (VCC = 5 V) - Supports >1 GHz signal switching with negligible timing impact in high-speed buses. |
| BIASV range | 1.3 V to VCC - Allows system-level control of precharge voltage to match host logic thresholds and reduce ground bounce. |
| Undershoot clamping | –2 V - Schottky diodes protect downstream receivers from negative transients during hot-plug events. |
| Supply voltage (VCC) | 4 V to 5.5 V - Compatible with 5-V TTL and mixed-voltage 4.5-V systems without level-shifting. |
| Input leakage (IIH/IIL) | ±150 µA / –5 µA - Ensures stable enable control under noisy or floating conditions without external pull resistors. |
| Thermal resistance (θJA) | 46°C/W (SOIC-DW) - Supports sustained operation at full load in industrial ambient (85°C) with standard PCB copper. |
Pinout & Package
SN74CBTS6800DW uses a 24-pin SOIC (DW) package with 1.27-mm pitch, 7.5-mm body width, and 2.35-mm height. Pin 1 index is located at top-left corner with notch marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ON (Pin 1) | Enable control input | Active-low logic: drives A↔B connection when low; enables B-port precharge to BIASV when high. |
| A1–A10 (Pins 2–11) | Port A data terminals | Bidirectional signal inputs/outputs; connected to B1–B10 when ON = low; high-impedance when disabled. |
| GND (Pin 12) | Ground reference | Primary return path for switch current and bias network; must be low-inductance for noise control. |
| VCC (Pin 13) | Power supply | Supplies internal FET gates and bias circuitry; decoupling required within 1 cm for transient immunity. |
| B1–B10 (Pins 14–23) | Port B data terminals | Bidirectional signal interface; precharged to BIASV via internal 10-kΩ resistor when ON = high or VCC = 0 V. |
| BIASV (Pin 24) | Bias voltage input | User-supplied reference (1.3 V to VCC) setting precharge level; determines noise margin during live insertion. |
Key Features
| Feature | Design Value |
|---|---|
| Precharged outputs | Internal 10-kΩ-equivalent pull-up to BIASV eliminates floating-bus noise during hot-swap, reducing system-level EMI. |
| Schottky diode clamping | Integrated I/O diodes clamp undershoot to –2 V, eliminating need for external TVS or diode networks in modular chassis designs. |
| TTL-compatible inputs | VIH = 2 V / VIL = 0.8 V ensures direct interfacing with legacy 5-V microcontrollers and FPGAs without level shifters. |
| Low on-resistance | 3–7 Ω (typical) minimizes IR drop and maintains signal edge rate across 10-bit parallel buses up to 100 MHz. |
| Live-insertion optimized | Combination of precharge + clamping + fast enable/disable (tPZH/tPLZ < 6 ns) prevents glitches during board hot-plug into powered backplanes. |
Applications
| Modular Backplane Interconnect | Hot-Swappable I/O Module |
|---|---|
Use Scenario: Signal routing between main controller card and field-replaceable peripheral modules in telecom rack systems. IC Role / Device Role / Timing Role: Bidirectional bus switch isolating A-side (controller) from B-side (module) during insertion/removal; ON controlled by system management ASIC. Use Value: Precharge to BIASV prevents bus contention and ground bounce; Schottky clamping absorbs connector arcing transients. |
Use Scenario: FPGA-based data acquisition module inserted into powered test bench while host PC remains operational. IC Role / Device Role / Timing Role: 10-bit data path gate enabling/disabling communication between host PCIe bridge and module ADC/DAC interface. Use Value: 0.25 ns tpd preserves timing margins in 100-MHz parallel sampling buses; 5-Ω ron avoids signal attenuation. |
| Legacy Bus Expansion | Industrial Control Chassis |
Use Scenario: Adding ISA or LPC-compatible peripherals to modern embedded controllers using adapter cards. IC Role / Device Role / Timing Role: Level-translating and isolating 5-V legacy bus signals from 3.3-V host logic via BIASV configuration. Use Value: TTL-compatible VIH/VIL allows direct connection to ISA address/data lines; no external biasing needed. |
Use Scenario: Distributed I/O rack where sensor/actuator modules plug into powered carrier boards in factory automation cells. IC Role / Device Role / Timing Role: Fault-isolating switch for 10-bit status/control lines between PLC master and slave modules. Use Value: –2 V undershoot clamping protects PLC GPIOs from ESD during repeated module swaps in dusty environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar FET bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT16210DL | 12-bit, dual 6-bit banks; no BIASV pin; fixed GND precharge only. | Lacks user-adjustable precharge; unsuitable for mixed-threshold systems requiring BIASV tuning. | Select when higher channel count is needed and precharge voltage is fixed at GND. |
| SN74CBTLV3245APWR | 8-bit, LVTTL-compatible (3.3-V only); no Schottky clamping; 2.5-Ω ron. | Requires 3.3-V supply only; lacks –2 V undershoot protection; incompatible with 5-V TTL buses. | Select for low-voltage, high-density 3.3-V systems where clamping is handled externally. |
Compared with SN74CBTS6800DW, SN74CBT16210DL offers more bits but sacrifices BIASV flexibility, while SN74CBTLV3245APWR delivers lower on-resistance at the cost of 5-V compatibility and integrated clamping-making SN74CBTS6800DW uniquely suited for robust 5-V live-insertion interfaces.
Availability
SN74CBTS6800DW is available at Aetrix Electronics and suitable for modular backplane interconnects, hot-swappable I/O modules, and industrial control chassis requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for SN74CBTS6800DW 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 90 years of innovation in industrial, automotive, and communications markets.
The SN74CBTS6800DW belongs to TI's CBTS-series FET bus switches, engineered specifically for live-insertion reliability in modular computing and telecom infrastructure where signal integrity during hot-swap is mission-critical.
FAQ
What is the maximum undershoot voltage the SN74CBTS6800DW can safely clamp?
The SN74CBTS6800DW integrates Schottky diodes on all I/O pins that clamp negative transients to –2 V. This specification is verified per absolute maximum ratings and ensures protection against connector arcing and ground bounce during live insertion. The SN74CBTS6800DW maintains this clamping behavior across its full operating temperature range (–40°C to 85°C) without derating.
Can the SN74CBTS6800DW operate with a BIASV voltage lower than VCC?
Yes-the SN74CBTS6800DW supports BIASV from 1.3 V up to VCC, as specified in recommended operating conditions. Setting BIASV below VCC (e.g., 2.4 V with VCC = 5 V) is valid and commonly used to match intermediate logic thresholds or reduce precharge current. The SN74CBTS6800DW's internal 10-kΩ-equivalent precharge path functions correctly across this full range.
Is the SN74CBTS6800DW pin-compatible with other packages in the same family?
No-SN74CBTS6800DW (SOIC-DW) has a unique 24-pin SOIC footprint and is not pin-compatible with SSOP (DB), TSSOP (PW), or TVSOP (DGV) variants. While all share identical logic and electrical behavior, mechanical layout requires separate PCB designs. The SN74CBTS6800DW pinout matches only the DW package drawing (SLMS051C), not DB/DBQ/PW/DGV outlines.
What is the typical on-state resistance of the SN74CBTS6800DW at 5-V operation?
At VCC = 5 V, the SN74CBTS6800DW exhibits a typical on-state resistance (ron) of 5 Ω, measured with VI = 0 V and II = 30 mA per channel. This value is confirmed in the electrical characteristics table and reflects the actual conductive path loss between A and B ports-critical for maintaining signal amplitude in 10-bit parallel buses carrying up to 128 mA total current.
Does the SN74CBTS6800DW require external pull-up resistors on the ON pin?
No-the SN74CBTS6800DW has CMOS-compatible input structure with IIH ≤ 150 µA and IIL ≥ –5 µA at VCC = 5.5 V, allowing direct connection to TTL or CMOS logic outputs without external biasing. The SN74CBTS6800DW's ON pin is actively driven low to enable switching and pulled high (to VCC or GND) to disable-no external pull-up is needed per TI application note SCBA004.
SN74CBTS6800DW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74CBTS
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- 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-SOIC
SN74CBTS6800DW FAQ
1.How can I place an order for SN74CBTS6800DW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74CBTS6800DW 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 SN74CBTS6800DW reliable?
The price and inventory of SN74CBTS6800DW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74CBTS6800DW is usually 5 days.
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Once your SN74CBTS6800DW 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 SN74CBTS6800DW?
For technical support, including SN74CBTS6800DW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74CBTS6800DW requirements.
6.How does Aetrix verify that SN74CBTS6800DW is sourced from the original manufacturer or authorized distributors?
All SN74CBTS6800DW 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 SN74CBTS6800DW meets industry standards.
7.What is the process for return or replacement of SN74CBTS6800DW?
All SN74CBTS6800DW units undergo pre-shipment inspection (PSI). If there is an issue with SN74CBTS6800DW, 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 SN74CBTS6800DW part is unused and in its original packaging.
Return procedure for SN74CBTS6800DW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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