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Texas Instruments SN74CBTS6800PWR
- Part No.:
- SN74CBTS6800PWR
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74CBTS6800PWR.pdf
- Description:
- IC BUS SWITCH 10 X 1:1 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,969
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Product details
Overview
SN74CBTS6800PWR from Texas Instruments is a 10-bit FET bus switch with precharged outputs and Schottky diode clamping, designed for high-speed TTL-compatible signal routing in live-insertion systems. It features 5-Ω on-state resistance, bidirectional switching, 0.25 ns typical propagation delay, and BIASV-controlled precharge to minimize noise during hot-swap events - used in backplane interconnects and modular computing chassis.
For engineers reviewing the SN74CBTS6800PWR datasheet, SN74CBTS6800PWR pinout, SN74CBTS6800PWR application, or SN74CBTS6800PWR equivalent, key selection criteria include its 24-pin TSSOP package, 4–5.5 V supply range, ±2 V undershoot clamping, precharge bias voltage support (1.3 V to VCC), and live-insertion noise suppression capability.
Technical Context
The SN74CBTS6800PWR implements a single-enable 10-bit FET-based analog switch architecture with integrated Schottky clamps on all I/O pins. Its low on-resistance (3–7 Ω) enables near-zero propagation delay and bidirectional signal integrity across A and B ports.
When enabled (ON = low), it establishes a low-impedance path between A1–A10 and B1–B10; when disabled (ON = high or VCC = 0 V), the B port is actively precharged to BIASV via an internal ~10-kΩ equivalent resistor, suppressing floating transients during hot-plug operations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-state resistance (ron) | 3–7 Ω at VCC = 4.5 V - ensures minimal voltage drop and signal attenuation in high-speed data paths. |
| Propagation delay (tpd) | 0.25 ns at VCC = 5 V - supports >1 GHz signal edge rates without timing degradation. |
| Supply voltage (VCC) | 4–5.5 V - compatible with standard 5-V TTL and mixed-voltage system rails. |
| Bias voltage (BIASV) | 1.3 V to VCC - user-selectable precharge level to match system reference and reduce ground bounce. |
| I/O undershoot clamping | –2 V via integrated Schottky diodes - protects downstream logic from negative transient damage during insertion. |
| Input leakage (IIH/IIL) | ±5 µA max - reduces control-line loading and simplifies driving circuit design. |
| Thermal resistance (θJA) | 88°C/W (TSSOP-PW) - defines maximum power dissipation under natural convection for thermal layout planning. |
Pinout & Package
TSSOP-24 (PW) package: 7.8 mm × 4.4 mm body, 0.65 mm pitch, 1.2 mm max height, RoHS-compliant NIPDAU finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 (A1–A10) |
A-side data input/output | Bidirectional signal terminals connected through FET channel when ON is low. |
| 13, 14, 15, 16, 17, 18, 19, 20, 21, 22 (B1–B10) |
B-side data input/output | Bidirectional counterpart to A-side; precharged to BIASV when switch is disabled. |
| 12 | VCC | Main power supply (4–5.5 V); powers internal FETs and bias circuitry. |
| 11 | GND | Reference ground for all I/O and control signals. |
| 23 | ON | Active-low enable control; drives switch state and activates B-port precharge when high. |
| 24 | BIASV | User-supplied bias voltage (1.3 V to VCC) setting precharge level for B-port during disable. |
Key Features
| Feature | Design Value |
|---|---|
| Precharged B-port outputs | Reduces live-insertion noise by holding B-side at stable BIASV instead of floating - critical for hot-swap backplanes. |
| Schottky diode clamping | Clamps I/O undershoot to –2 V, preventing latch-up or damage in noisy industrial or telecom environments. |
| TTL-compatible inputs | VIH = 2 V / VIL = 0.8 V thresholds allow direct interfacing with legacy 5-V logic without level shifters. |
| Low on-state resistance | 3–7 Ω ensures <10 mV drop at 30 mA, preserving signal amplitude in high-fanout data buses. |
| Bidirectional operation | No direction control needed - same electrical behavior whether signal flows A→B or B→A. |
Applications
| Modular Backplane Interconnect | Hot-Swappable Card Cage |
|---|---|
|
Use Scenario: Signal routing between fixed motherboard and removable line cards in telecom or test equipment chassis. IC Role / Device Role / Timing Role: Bidirectional bus switch enabling dynamic connection/disconnection without disrupting active data lanes. Use Value: Precharged B-port eliminates glitching during card insertion; Schottky clamps suppress ESD-induced undershoot on shared backplane traces. |
Use Scenario: Power and signal isolation for PCIe or parallel bus modules inserted/removed under power. IC Role / Device Role / Timing Role: Live-insertion interface buffer controlling data path enablement and transient suppression. Use Value: 0.25 ns tpd preserves timing margins in multi-gigabit links; 5-Ω ron maintains impedance continuity across hot-swap boundaries. |
| Legacy Bus Expansion Hub | Industrial Control I/O Multiplexer |
|
Use Scenario: Extending ISA or LPC bus segments across daughterboards in embedded controllers. IC Role / Device Role / Timing Role: Low-latency bus repeater with TTL-level compatibility and undervoltage protection. Use Value: 4–5.5 V VCC range matches legacy 5-V rail; Schottky clamps prevent damage from inductive kickback on long bus runs. |
Use Scenario: Isolating sensor/actuator I/O lines in programmable logic controllers during field maintenance. IC Role / Device Role / Timing Role: Fault-tolerant signal gate managing multiple analog/digital channels with transient immunity. Use Value: BIASV-adjustable precharge adapts to varying reference voltages across I/O banks; 88°C/W θJA supports convection-cooled enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit FET bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT16210PVR | 16-bit, dual 8-bit configuration; no BIASV precharge; higher 10-Ω ron. | Lacks live-insertion noise suppression; suited for static expansion, not hot-swap. | Select when higher channel count is required and precharge is unnecessary. |
| SN74LVC1G3157DCKR | Single-pole double-throw (SPDT), 5-V only, no Schottky clamps, 6-Ω ron. | Not scalable to 10-bit; no undershoot protection; limited to point-to-point routing. | Choose for simple signal multiplexing where transient immunity is not critical. |
Compared with SN74CBTS6800PWR, SN74CBT16210PVR offers more bits but sacrifices precharge functionality and adds layout complexity, while SN74LVC1G3157DCKR provides compact SPDT switching but cannot replicate 10-bit parallel live-insertion performance or –2 V clamping.
Availability
SN74CBTS6800PWR is available at Aetrix Electronics and suitable for modular backplane interconnects, hot-swappable card cages, and legacy bus expansion hubs requiring stable component supply, long-term lifecycle support, and consistent TSSOP-PW packaging.
Supply support for SN74CBTS6800PWR 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 SN74CBTS6800PWR belongs to TI's CBTS family of high-speed bus switches, engineered specifically for live-insertion and hot-swap applications in telecom infrastructure, modular computing, and ruggedized control systems.
FAQ
What is the maximum undershoot voltage the SN74CBTS6800PWR can clamp?
The SN74CBTS6800PWR integrates Schottky diodes on all I/O pins that clamp undershoot to –2 V, protecting connected devices from negative transients during hot-plug events or ESD discharge. This clamping behavior is specified across the full operating temperature range (–40°C to 85°C) and remains effective regardless of VCC or BIASV settings. The SN74CBTS6800PWR achieves this without external components, simplifying board-level transient protection design.
Does the SN74CBTS6800PWR support bidirectional signal flow?
Yes, the SN74CBTS6800PWR supports fully bidirectional signal flow between A and B ports when enabled (ON = low). Its FET-based architecture imposes no directionality - signals pass equally well from A1–A10 to B1–B10 or vice versa, with identical 3–7 Ω on-state resistance and 0.25 ns propagation delay in either direction. This eliminates the need for direction-control logic and simplifies PCB routing in symmetric bus architectures.
What is the role of the BIASV pin on the SN74CBTS6800PWR?
The BIASV pin on the SN74CBTS6800PWR sets the precharge voltage applied to the B-side outputs (B1–B10) when the switch is disabled (ON = high or VCC = 0 V). It accepts 1.3 V to VCC, allowing system designers to match the B-port idle level to adjacent logic references - reducing ground bounce and minimizing noise during live insertion. This function is implemented via an internal ~10-kΩ equivalent resistor and is unique to the CBTS family among TI bus switches.
Can the SN74CBTS6800PWR operate at 3.3 V supply?
No, the SN74CBTS6800PWR requires a minimum VCC of 4 V and is rated for 4–5.5 V operation per its recommended conditions. It does not support 3.3 V supply rails. Attempting to operate below 4 V may result in undefined switching behavior, increased on-resistance, or failure to meet timing specifications. For 3.3-V systems, consider TI's LVC or AUC series bus switches instead of the SN74CBTS6800PWR.
What is the thermal resistance (θJA) of the SN74CBTS6800PWR in its TSSOP package?
The SN74CBTS6800PWR in the TSSOP-24 (PW) package has a junction-to-ambient thermal resistance (θJA) of 88°C/W under standard JEDEC test conditions. This value assumes a two-layer PCB with minimal copper pour; actual thermal performance improves with enhanced heatsinking, such as internal ground/power planes or thermal vias. Designers must use this θJA to calculate maximum allowable power dissipation for reliable operation at 85°C ambient.
SN74CBTS6800PWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74CBTS
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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
SN74CBTS6800PWR FAQ
1.How can I place an order for SN74CBTS6800PWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74CBTS6800PWR 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 SN74CBTS6800PWR reliable?
The price and inventory of SN74CBTS6800PWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74CBTS6800PWR is usually 5 days.
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Once your SN74CBTS6800PWR 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 SN74CBTS6800PWR?
For technical support, including SN74CBTS6800PWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74CBTS6800PWR requirements.
6.How does Aetrix verify that SN74CBTS6800PWR is sourced from the original manufacturer or authorized distributors?
All SN74CBTS6800PWR 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 SN74CBTS6800PWR meets industry standards.
7.What is the process for return or replacement of SN74CBTS6800PWR?
All SN74CBTS6800PWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74CBTS6800PWR, 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 SN74CBTS6800PWR part is unused and in its original packaging.
Return procedure for SN74CBTS6800PWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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