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Texas Instruments SN74CBT6800CDGVR
- Part No.:
- SN74CBT6800CDGVR
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 24-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74CBT6800CDGVR.pdf
- Description:
- IC BUS SWITCH 10 X 1:1 24TVSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,431
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Product details
Overview
SN74CBT6800CDGVR from Texas Instruments is a 10-bit bidirectional FET bus switch with near-zero propagation delay (0.15 ns typical at 5 V), 3 Ω typical ON-state resistance, and active undershoot protection up to −2 V on both A and B ports. It supports live insertion in PCI hot-plug systems via B-port precharge to user-defined BIASV voltage and operates across 4 V–5.5 V VCC with 0–5 V data I/O signaling.
For engineers reviewing the SN74CBT6800CDGVR datasheet, SN74CBT6800CDGVR pinout, SN74CBT6800CDGVR application, or SN74CBT6800CDGVR equivalent, key selection criteria include its 24-pin TVSOP package, Ioff partial-power-down capability, ±128 mA switch current rating, and bias-voltage-controlled live-insertion noise suppression.
Technical Context
The SN74CBT6800CDGVR implements ten independent FET transmission gates controlled by a single active-low ON input, enabling simultaneous bidirectional signal routing between A and B ports. Its internal undershoot-protection circuitry actively clamps A/B port voltages down to −2 V while maintaining OFF-state isolation.
B-port terminals are internally pulled to BIASV via ~10-kΩ equivalent resistance when ON is high or VCC = 0 V, minimizing signal distortion during hot-plug events. The device meets JESD 78 Class II latch-up immunity (>100 mA) and JESD 22 ESD ratings (2000-V HBM, 1000-V CDM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4 V to 5.5 V - ensures compatibility with 5-V TTL and mixed-voltage systems including 3.3-V/5-V interfacing. |
| ron (Typical) | 3 Ω - enables minimal voltage drop and signal attenuation for high-speed digital signals up to 100+ MHz. |
| tpd (Typical) | 0.15 ns at VCC = 5 V - delivers near-transparent signal pass-through with negligible timing skew in critical data paths. |
| Cio(OFF) | 5.5 pF typical - reduces capacitive loading on driven buses, preserving signal integrity and edge rates. |
| Ioff | 10 µA max at VCC = 0 V - guarantees isolation and prevents backflow current during partial power-down, protecting powered subsystems. |
| Undershoot Protection | −2 V on A/B ports - maintains OFF-state integrity during transient negative excursions common in hot-plug scenarios. |
| BIASV Range | 0 V to VCC - allows precise matching to receiver threshold voltages (e.g., 1.2 V, 1.8 V, 2.5 V, 3.3 V) to suppress live-insertion glitches. |
| Switch Current | ±128 mA - supports robust drive capability for terminated or lightly loaded parallel buses without signal degradation. |
Pinout & Package
SN74CBT6800CDGVR is housed in a 24-pin Thin Very Small Outline Package (TVSOP, DGV), 4.4 mm × 6.6 mm body, 0.4 mm pitch, 1.2 mm max height, RoHS-compliant NIPDAU lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1–A10 | Data input/output (A-side) | 10-bit bidirectional signal path connected to B-port when ON = low; high-impedance when disabled. |
| B1–B10 | Data input/output (B-side) | 10-bit bidirectional signal path; precharged to BIASV when switch is OFF to suppress live-insertion noise. |
| ON | Active-low enable control | Drives all 10 switches simultaneously; must be pulled up to VCC during power sequencing to ensure defined startup state. |
| BIASV | Bias supply reference | User-supplied voltage (0–VCC) setting precharge level for B-port; critical for glitch-free hot-plug operation. |
| VCC | Power supply | Primary 4–5.5 V supply powering internal logic and FET channel conduction; powers undershoot protection circuitry. |
| GND | Ground reference | Common return for VCC, BIASV, and all signal paths; required for proper clamp diode and Ioff operation. |
Key Features
| Feature | Design Value |
|---|---|
| Undershoot protection | Active clamping to −2 V on A/B ports ensures reliable OFF-state isolation during negative transients in hot-swap environments. |
| B-port precharge | Internal ~10-kΩ pull-up to BIASV eliminates floating-bus noise and prevents false triggering during card insertion/removal. |
| Ioff partial-power-down | 10 µA max leakage at VCC = 0 V enables safe integration into systems where subsystems power up/down asynchronously. |
| Low capacitance interface | 5.5 pF OFF-state I/O capacitance minimizes loading on high-speed buses, preserving rise/fall times and reducing crosstalk. |
| Wide voltage signaling | 0–5 V data I/O tolerance supports interoperability across 0.8 V to 5 V logic families without level shifters. |
| TTL/CMOS-compatible control | VIH = 2 V min and VIL = 0.8 V max allow direct drive from legacy TTL and modern 3.3 V/5 V CMOS outputs. |
Applications
| PCI Hot-Plug Interface | Memory Interleaving Bus Isolation |
|---|---|
Use Scenario: Inserting/removing expansion cards into an active PCI bus without disrupting system operation. IC Role / Device Role / Timing Role: Bidirectional bus switch providing galvanic isolation and B-port precharge to match receiver thresholds. Use Value: Eliminates bus glitches during live insertion by holding B-port at BIASV = 2.0 V, preventing signal crossings in receiver input threshold region. | Use Scenario: Isolating memory banks in dual-channel DDR systems to prevent contention during bank switching. IC Role / Device Role / Timing Role: Low-latency, low-ron signal gate enabling sub-nanosecond propagation delay between controller and memory modules. Use Value: Maintains timing margins with 0.15 ns tpd and 3 Ω ron, avoiding setup/hold violations in high-frequency memory interfaces. |
| Low-Distortion Analog Signal Gating | Industrial Backplane Signal Routing |
Use Scenario: Enabling/disabling analog sensor signals (e.g., 0–3.3 V thermocouple outputs) in programmable logic controllers. IC Role / Device Role / Timing Role: Analog-capable FET switch with flat ron vs. voltage curve and <5.5 pF OFF capacitance. Use Value: Preserves signal fidelity with <0.1% THD over 0–3.3 V range due to low ron variation and minimal charge injection. | Use Scenario: Routing control and status signals across modular industrial backplanes with mixed-voltage slots. IC Role / Device Role / Timing Role: Voltage-agnostic bidirectional buffer supporting 0–5 V signaling levels and Ioff isolation during slot power cycling. Use Value: Enables seamless hot-swap of field I/O modules without requiring full system reset or affecting adjacent powered slots. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBTD6800CDGVR | Includes integrated 5-V tolerant level shifters; higher ICC (15 µA max); no BIASV pin. | Designed for level translation between 3.3-V and 5-V domains; lacks live-insertion precharge capability. | Select when voltage translation is required and hot-plug noise suppression is not critical. |
| SN74LVC1G3157DCKR | Single-pole double-throw (SPDT) analog switch; 5-V supply only; 6 Ω ron; no undershoot protection. | Targeted at low-pin-count signal routing, not multi-bit bus isolation; unsuitable for PCI hot-plug. | Choose for space-constrained single-channel applications where BIASV and −2 V protection are unnecessary. |
Compared with SN74CBTD6800CDGVR and SN74LVC1G3157DCKR, the SN74CBT6800CDGVR uniquely combines 10-bit parallel switching, BIASV-configurable live-insertion immunity, and −2 V undershoot protection-making it the only option qualified for PCI-compliant hot-plug subsystems requiring simultaneous multi-line isolation.
Availability
SN74CBT6800CDGVR is available at Aetrix Electronics and suitable for PCI hot-plug interfaces, memory interleaving architectures, and industrial backplane signal routing requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for SN74CBT6800CDGVR 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 experience in high-reliability interface solutions.
The SN74CBT6800CDGVR belongs to TI's Widebus™ family of high-speed bus switches, engineered specifically for low-distortion, low-latency signal gating in hot-pluggable computing and industrial backplane applications.
FAQ
What is the maximum undershoot voltage the SN74CBT6800CDGVR can withstand on its A and B ports?
The SN74CBT6800CDGVR provides active undershoot protection up to −2 V on both A and B ports, as verified in the absolute maximum ratings and functional test conditions. This protection is implemented via internal clamp circuitry that maintains OFF-state integrity during negative transients. The SN74CBT6800CDGVR datasheet specifies VO(USP) = 3 V under −10 mA undershoot current, confirming robust −2 V tolerance. Operation beyond this limit risks permanent damage.
How does the BIASV pin function in the SN74CBT6800CDGVR during hot-plug events?
The BIASV pin on the SN74CBT6800CDGVR sets the precharge voltage for all B-port terminals when the switch is disabled (ON = high) or powered down (VCC = 0 V). Internally, each B pin connects through ~10-kΩ resistance to BIASV, holding the bus near the receiver's input threshold to prevent glitch-induced false triggering during card insertion. For optimal PCI hot-plug performance, BIASV should be set to 2.0 V to align with standard 5-V TTL receiver thresholds. The SN74CBT6800CDGVR requires BIASV to be within 0–VCC.
Can the SN74CBT6800CDGVR operate with mixed-voltage signaling, such as 1.8-V inputs driving a 3.3-V bus?
Yes, the SN74CBT6800CDGVR supports 0–5 V data I/O signaling across all logic families, including 0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V, and 5 V. Its FET-based architecture has no internal level-shifting circuitry but relies on voltage-tolerant pass gates, allowing bidirectional signal translation without external components. Control inputs accept TTL or 3.3 V/5 V CMOS levels. The SN74CBT6800CDGVR maintains specified ron and tpd across this full range, provided VCC remains within 4–5.5 V.
What is the thermal performance of the SN74CBT6800CDGVR in its TVSOP (DGV) package?
The SN74CBT6800CDGVR in the TVSOP-24 (DGV) package has a junction-to-ambient thermal impedance (θJA) of 86°C/W, as specified in the absolute maximum ratings table. This value assumes standard JEDEC 2-layer board conditions. At maximum rated ICC (3 µA) and worst-case ron power dissipation under 128 mA load, self-heating remains negligible (<0.1°C). The SN74CBT6800CDGVR is rated for −40°C to 85°C operation and features NIPDAU lead finish with MSL Level-1 handling.
Does the SN74CBT6800CDGVR support partial-power-down mode, and how is it implemented?
Yes, the SN74CBT6800CDGVR supports partial-power-down mode via its Ioff feature. When VCC = 0 V, the device limits OFF-state leakage current to ≤10 µA per I/O terminal, preventing damaging backflow current from live buses into unpowered sections. This behavior is guaranteed across −40°C to 85°C and is validated per JESD 78 Class II latch-up testing. The SN74CBT6800CDGVR maintains high-impedance isolation between A and B ports during power-down, making it suitable for modular systems with asynchronous power sequencing.
SN74CBT6800CDGVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74CBT
- Package/Case:
- 24-TFSOP (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:
- 4V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-TVSOP
SN74CBT6800CDGVR FAQ
1.How can I place an order for SN74CBT6800CDGVR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74CBT6800CDGVR 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 SN74CBT6800CDGVR reliable?
The price and inventory of SN74CBT6800CDGVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74CBT6800CDGVR is usually 5 days.
3.What payment methods are accepted for SN74CBT6800CDGVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74CBT6800CDGVR transactions.
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4.How is shipping managed for SN74CBT6800CDGVR?
SN74CBT6800CDGVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74CBT6800CDGVR 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 SN74CBT6800CDGVR?
For technical support, including SN74CBT6800CDGVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74CBT6800CDGVR requirements.
6.How does Aetrix verify that SN74CBT6800CDGVR is sourced from the original manufacturer or authorized distributors?
All SN74CBT6800CDGVR 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 SN74CBT6800CDGVR meets industry standards.
7.What is the process for return or replacement of SN74CBT6800CDGVR?
All SN74CBT6800CDGVR units undergo pre-shipment inspection (PSI). If there is an issue with SN74CBT6800CDGVR, 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 SN74CBT6800CDGVR part is unused and in its original packaging.
Return procedure for SN74CBT6800CDGVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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