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Texas Instruments SN74CBTS6800DBR
- Part No.:
- SN74CBTS6800DBR
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 24-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
SN74CBTS6800DBR.pdf
- Description:
- IC BUS SWITCH 10 X 1:1 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
SN74CBTS6800DBR 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 systems requiring robust I/O protection.
For engineers reviewing the SN74CBTS6800DBR datasheet, SN74CBTS6800DBR pinout, SN74CBTS6800DBR application, or SN74CBTS6800DBR equivalent, key selection criteria include on-resistance matching, BIASV biasing flexibility, Schottky undershoot clamping to –2 V, live-insertion noise suppression, and SSOP-24 thermal performance (θJA = 63°C/W).
Technical Context
The SN74CBTS6800DBR implements a single-enable 10-bit FET-based analog switch architecture with integrated Schottky clamps on all A/B I/Os and a dedicated BIASV terminal. Its low ron (3–7 Ω) enables near-zero propagation delay and minimal signal distortion across bidirectional data paths.
When ON is high or VCC = 0 V, the B-port outputs are actively precharged to user-supplied BIASV via an internal ~10-kΩ equivalent resistor - a critical feature for suppressing transients during hot-plug operations in modular telecom and industrial control backplanes.
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-current bidirectional data paths. |
| Propagation delay (tpd) | 0.25 ns (VCC = 5 V); supports >1 GHz signal integrity in high-speed parallel bus applications. |
| BIASV range | 1.3 V to VCC; allows flexible precharge level selection to match system logic thresholds and reduce ground bounce. |
| Undershoot clamping | –2 V via integrated Schottky diodes; protects downstream logic from ESD-induced negative transients without external components. |
| Supply voltage (VCC) | 4–5.5 V; compatible with standard 5-V TTL and mixed-voltage 3.3/5-V system interfaces. |
| Continuous channel current | 128 mA per switch; supports robust drive capability for terminated parallel buses and FPGA I/O expansion. |
| Input clamp current (IIK) | –50 mA; defines safe transient current handling limit before damage occurs under negative input stress. |
Pinout & Package
SN74CBTS6800DBR is housed in a 24-pin SSOP (Shrink Small Outline Package) with 0.65 mm pitch, 7.7 mm × 4.9 mm body size, and 1.2 mm max height - optimized for space-constrained industrial and telecom modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ON (Pin 1) | Enable control input | Active-low logic control: drives switch ON when low; forces B-port precharge to BIASV when high. |
| A1–A10 (Pins 2–11) | Port A data terminals | Unidirectional or bidirectional signal inputs/outputs connected to upstream logic or controller side of bus. |
| GND (Pin 12) | Ground reference | Primary return path for switch current and bias network; must be low-impedance for noise control. |
| VCC (Pin 13) | Power supply | Supplies switch FETs and internal logic; requires local 0.1 µF decoupling adjacent to pin. |
| B1–B10 (Pins 14–23) | Port B data terminals | Connected to downstream load or hot-swap module side; precharged to BIASV when disabled. |
| BIASV (Pin 24) | Bias voltage input | User-supplied voltage (1.3 V to VCC) setting precharge level for B-port during disable state. |
Key Features
| Feature | Design Value |
|---|---|
| Precharged B-port outputs | Internal ~10-kΩ pull-up to BIASV eliminates floating states and suppresses live-insertion noise in modular backplanes. |
| Schottky diode clamping | Integrated diodes on all A/B I/Os clamp undershoot to –2 V, eliminating need for external TVS or diode networks. |
| TTL-compatible inputs | VIH = 2 V / VIL = 0.8 V thresholds ensure direct interfacing with legacy 5-V microcontrollers and FPGAs. |
| Bidirectional low-ron switching | 3–7 Ω on-resistance enables symmetric signal routing without directionality constraints or added isolation logic. |
| Live-insertion optimized | Combined BIASV precharge + Schottky clamping meets stringent hot-swap requirements in NEBS-compliant telecom shelves. |
Applications
| Modular Backplane Interconnect | Hot-Swappable I/O Expansion Card |
|---|---|
|
Use Scenario: Signal routing between fixed motherboard and field-replaceable line cards in telecom chassis. IC Role / Device Role / Timing Role: Bidirectional bus switch isolating card-side signals during insertion/removal while maintaining stable logic levels. Use Value: Precharged B-port prevents glitches on shared backplane lines; Schottky clamping absorbs contact bounce transients. |
Use Scenario: Adding USB, RS-485, or GPIO interfaces to embedded controllers via pluggable daughterboards. IC Role / Device Role / Timing Role: Hot-swap interface buffer enabling safe power-up sequencing and signal stabilization before host enumeration. Use Value: BIASV-configurable precharge aligns with host logic thresholds; 0.25 ns tpd preserves timing margins in high-speed peripheral links. |
| Industrial PLC I/O Module | Test Equipment Signal Multiplexer |
|
Use Scenario: Isolating sensor/actuator channels in programmable logic controller racks with field-wirable terminals. IC Role / Device Role / Timing Role: Fault-tolerant bus gate managing signal flow between CPU bus and isolated I/O ASICs. Use Value: 128 mA per channel supports driving long traces or multiple loads; –2 V undershoot clamping prevents latch-up in noisy factory environments. |
Use Scenario: Routing DUT signals to measurement instruments in automated test systems with reconfigurable probe paths. IC Role / Device Role / Timing Role: Low-distortion analog/digital multiplexer enabling fast channel switching without settling delays. Use Value: 5-Ω ron minimizes gain error in precision measurements; bidirectional operation simplifies PCB layout for shared stimulus/response paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT16210CDL | 16-bit, 24-pin SSOP, higher ron (6–12 Ω), no BIASV precharge, only GND/VCC termination. | Lacks live-insertion support; suitable for static board-level interconnects but not hot-swap modules. | Select when channel count >10 is required and precharge is unnecessary. |
| SN74CBTLV3245PWR | 8-bit, TSSOP-20, 3.3-V only (VCC = 2.3–3.6 V), lower ron (2–4 Ω), no Schottky clamps or BIASV. | Designed for low-voltage portable systems; lacks –2 V undershoot protection and precharge functionality. | Choose for battery-powered or 3.3-V-only designs where live-insertion is not required. |
Compared with SN74CBTS6800DBR, SN74CBT16210CDL offers more channels but no precharge or Schottky clamping, limiting use in hot-swap systems; SN74CBTLV3245PWR provides lower voltage operation and ron but omits critical live-insertion features, making SN74CBTS6800DBR uniquely suited for 5-V modular infrastructure.
Availability
SN74CBTS6800DBR is available at Aetrix Electronics and suitable for modular telecom backplanes, industrial PLC I/O modules, and hot-swappable test equipment requiring stable component supply, long-term lifecycle support, and guaranteed SSOP-24 sourcing.
Supply support for SN74CBTS6800DBR 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 SN74CBTS6800DBR belongs to TI's CBTS-series bus switches - engineered specifically for live-insertion, hot-swap, and high-speed parallel bus isolation in telecom, industrial, and test equipment applications.
FAQ
What is the maximum undershoot voltage the SN74CBTS6800DBR can safely clamp?
The SN74CBTS6800DBR integrates Schottky diodes on all A/B I/O terminals that clamp undershoot to –2 V. This specification is verified per absolute maximum ratings and ensures protection against negative transients during hot-swap events without requiring external clamping components. The SN74CBTS6800DBR maintains this clamping behavior across its full operating temperature range (–40°C to 85°C) and supply voltage range (4 V to 5.5 V).
How does the BIASV pin function in the SN74CBTS6800DBR during enable/disable states?
In the SN74CBTS6800DBR, the BIASV pin supplies a user-selectable bias voltage (1.3 V to VCC) to precharge the B-port outputs when the ON pin is high or VCC = 0 V. This precharge occurs through an internal ~10-kΩ equivalent resistor, holding B1–B10 at BIASV to prevent floating and reduce noise during live insertion. When ON is low, the switch connects A and B ports normally, and BIASV has no effect on signal path operation.
What is the thermal performance of the SN74CBTS6800DBR in its SSOP package?
The SN74CBTS6800DBR in the DB (SSOP-24) package has a specified junction-to-ambient thermal impedance (θJA) of 63°C/W under standard JEDEC test conditions. This value assumes a two-layer PCB with minimum copper pour; actual thermal performance improves with enhanced copper area and thermal vias. The package's 1.2 mm max height and 0.65 mm lead pitch support compact, high-density layouts in space-constrained industrial modules.
Can the SN74CBTS6800DBR operate bidirectionally with matched signal integrity in both directions?
Yes, the SN74CBTS6800DBR is a true bidirectional FET bus switch with symmetrical on-state resistance (3–7 Ω) and near-zero propagation delay (0.25 ns typical). Its CMOS FET structure imposes no inherent directionality - signal integrity remains consistent whether driven from A-to-B or B-to-A, provided VCC is stable and load capacitance is within spec (≤50 pF). This makes the SN74CBTS6800DBR ideal for shared-bus architectures requiring transparent, low-distortion routing.
What are the recommended operating conditions for VCC and BIASV in the SN74CBTS6800DBR?
The SN74CBTS6800DBR requires VCC between 4 V and 5.5 V for reliable operation. BIASV must be set between 1.3 V and VCC, and must never exceed VCC. For optimal live-insertion noise suppression, BIASV is typically set to match the logic-high threshold of downstream receivers (e.g., 2.4 V for 5-V TTL). Both supplies must be well-decoupled: 0.1 µF ceramic capacitor at VCC and low-noise source for BIASV.
SN74CBTS6800DBR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74CBTS
- Package/Case:
- 24-SSOP (0.209", 5.30mm Width)
- Packaging:
- Bulk
- 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-SSOP
SN74CBTS6800DBR FAQ
1.How can I place an order for SN74CBTS6800DBR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74CBTS6800DBR 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 SN74CBTS6800DBR reliable?
The price and inventory of SN74CBTS6800DBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74CBTS6800DBR is usually 5 days.
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SN74CBTS6800DBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74CBTS6800DBR 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 SN74CBTS6800DBR?
For technical support, including SN74CBTS6800DBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74CBTS6800DBR requirements.
6.How does Aetrix verify that SN74CBTS6800DBR is sourced from the original manufacturer or authorized distributors?
All SN74CBTS6800DBR 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 SN74CBTS6800DBR meets industry standards.
7.What is the process for return or replacement of SN74CBTS6800DBR?
All SN74CBTS6800DBR units undergo pre-shipment inspection (PSI). If there is an issue with SN74CBTS6800DBR, 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 SN74CBTS6800DBR part is unused and in its original packaging.
Return procedure for SN74CBTS6800DBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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