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Texas Instruments 74CBT16800CDGVRE4
- Part No.:
- 74CBT16800CDGVRE4
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 48-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
74CBT16800CDGVRE4.pdf
- Description:
- IC BUS SWITCH 10 X 1:1 48TVSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,290
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Product details
Overview
74CBT16800CDGVRE4 from Texas Instruments is a 20-bit FET bus switch organized as two independent 10-bit bidirectional switches, featuring 3 Ω typical ON-state resistance, −2 V undershoot protection on A/B ports, and B-port precharge via BIASV for live-insertion noise suppression in PCI hot-plug systems.
For engineers reviewing the 74CBT16800CDGVRE4 datasheet, 74CBT16800CDGVRE4 pinout, 74CBT16800CDGVRE4 application, or 74CBT16800CDGVRE4 equivalent, key selection criteria include its 4–5.5 V VCC operation, 5.5 pF OFF-state I/O capacitance, Ioff partial-power-down support, and TVSOP-48 (DGV) package compatibility with high-density PCB layouts.
Technical Context
The 74CBT16800CDGVRE4 implements dual independent 10-bit FET-based analog/digital bus switches with active undershoot-protection circuitry on both A and B ports, enabling robust signal integrity during hot-plug events. Each switch channel supports bidirectional data flow with near-zero propagation delay (0.15 ns typical at 5 V).
Its B-port precharge architecture uses an external BIASV supply (0–VCC) to bias outputs to a user-defined voltage-typically matching receiver input thresholds-minimizing glitching during card insertion/removal. The device fully supports partial-power-down mode via Ioff, preventing backflow current when VCC = 0 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4 V to 5.5 V - Enables direct interface with 5-V TTL and mixed-voltage systems including 3.3-V logic domains. |
| ron (Typical) | 3 Ω - Ensures minimal voltage drop and signal distortion under 64 mA load, critical for high-fidelity analog/digital switching. |
| Cio(OFF) | 5.5 pF - Reduces capacitive loading on upstream drivers and preserves signal edge rates in high-speed buses. |
| Undershoot Protection | −2 V on A/B ports - Prevents false turn-on and latch-up during transient negative excursions common in hot-plug scenarios. |
| Ioff | 10 µA max at VCC = 0 V - Guarantees isolation between powered and unpowered system sections, supporting safe partial-power-down operation. |
| Propagation Delay | 0.15 ns (VCC = 5 V) - Delivers near-transparent signal path timing, essential for PCI and memory interleaving applications. |
| BIASV Range | 0 V to VCC - Allows precise tuning of B-port precharge level (e.g., 2.4 V) to match receiver VIH/VIL thresholds and suppress live-insertion noise. |
Pinout & Package
74CBT16800CDGVRE4 is housed in a 48-pin TVSOP (DGV) package measuring 12.6 mm × 6.2 mm × 1.2 mm, optimized for high-density PCB layouts and automated assembly. Pin pitch is 0.4 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A1–1A10, 2A1–2A10 | A-side data inputs/outputs | Bidirectional signal terminals for first and second 10-bit switch banks; tolerate 0–5.5 V signaling levels. |
| 1B1–1B10, 2B1–2B10 | B-side data inputs/outputs | Bidirectional terminals precharged to BIASV when OE is high or VCC = 0 V, minimizing live-insertion glitches. |
| 1OE, 2OE | Output-enable controls | Active-low enables for respective 10-bit banks; must be pulled up to VCC during power sequencing to ensure Hi-Z at startup. |
| BIASV | Bias supply input | User-supplied voltage (0–VCC) setting precharge level for all B-port outputs; critical for hot-plug noise mitigation. |
| VCC, GND (×6) | Power and ground | Distributed VCC/GND pins reduce switching noise and improve PSRR; multiple GND connections minimize ground bounce. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional low-distortion switching | 3 Ω ron and 5.5 pF Cio(OFF) enable clean analog/digital signal routing without direction control logic. |
| Live-insertion noise suppression | BIASV-controlled B-port precharge eliminates threshold-crossing glitches during hot-plug, validated for PCI compliance. |
| Robust undershoot immunity | Active protection circuitry clamps A/B ports to −2 V, preventing unintended conduction during transient negative excursions. |
| Partial-power-down capability | Ioff ≤ 10 µA ensures no backfeed current when VCC = 0 V, enabling safe integration into multi-rail systems with staggered power sequencing. |
| Mixed-signal voltage interoperability | Supports 0.8 V to 5 V I/O signaling across A/B ports, allowing seamless interfacing between legacy 5-V and modern low-voltage logic. |
Applications
| PCI Hot-Plug Interface | Memory Interleaving Bus Isolation |
|---|---|
Use Scenario: Inserting/removing expansion cards into live PCI backplanes without disrupting system operation. IC Role / Device Role / Timing Role: Bidirectional bus switch isolating card-side signals from main bus; B-port precharged to match receiver VIH to prevent false triggering. Use Value: Eliminates bus glitches during card mating by ensuring B-port voltage stays outside receiver input threshold region, meeting PCI hot-plug specification requirements. |
Use Scenario: Dynamically routing address/data between dual memory banks in high-bandwidth embedded controllers. IC Role / Device Role / Timing Role: Low-latency (0.15 ns), low-ron switch enabling fast, transparent inter-bank data transfer without added timing overhead. Use Value: Maintains signal integrity across 20-bit parallel paths with <5.5 pF loading, preserving setup/hold margins in DDR-SDRAM or SRAM interleaving architectures. |
| Low-Distortion Analog Signal Gating | Legacy-to-Modern Logic Voltage Translation |
Use Scenario: Enabling/disabling audio or sensor analog signals in battery-powered instrumentation with minimal THD impact. IC Role / Device Role / Timing Role: Analog switch with 3 Ω ron and <15.5 pF Cio(ON) providing near-ideal transmission gate behavior for DC–100 MHz signals. Use Value: Delivers <0.01% THD at 10 kHz due to ultra-low on-resistance and symmetric charge injection, suitable for precision analog front-ends. |
Use Scenario: Interfacing 5-V microcontrollers with 1.8-V or 2.5-V peripherals in mixed-voltage industrial I/O modules. IC Role / Device Role / Timing Role: Level-shifting bus switch supporting 0–5.5 V I/O on both sides, eliminating need for discrete level translators or voltage dividers. Use Value: Enables direct connection between disparate logic families while maintaining signal rise/fall times and reducing component count by >3 parts per channel. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT16210DGGR | 24-bit single-bank switch; no BIASV pin; 4.5 Ω ron; lacks undershoot protection | Suitable for static bus isolation only; not certified for hot-plug or live-insertion use cases | Select when board-level hot-plug is absent and space-constrained layout favors single 24-bit channel over dual 10-bit banks. |
| 74LVC16244ADGGRE4 | 24-bit non-inverting buffer with 3-state outputs; 24 mA drive; no analog switching capability | Provides voltage translation and drive strength but cannot perform bidirectional analog gating or hot-plug precharge | Choose for digital-only level shifting where direction control and high-current sourcing are required, not for analog signal routing or hot-plug resilience. |
Compared with SN74CBT16210DGGR and 74LVC16244ADGGRE4, the 74CBT16800CDGVRE4 uniquely combines dual independent 10-bit bidirectional switching, BIASV-controlled live-insertion noise suppression, and −2 V undershoot protection-making it the only option qualified for PCI-compliant hot-plug subsystems requiring analog/digital transparency and partial-power-down safety.
Availability
74CBT16800CDGVRE4 is available at Aetrix Electronics and suitable for PCI hot-plug interfaces, memory interleaving subsystems, and low-distortion analog signal gating requiring stable component supply, RoHS-compliant packaging, and TVSOP-48 footprint compatibility.
Supply support for 74CBT16800CDGVRE4 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 logic solutions, with decades of innovation in high-speed interface and power management ICs.
The 74CBT16800CDGVRE4 belongs to TI's Widebus™ family of high-speed FET bus switches, designed specifically for low-distortion, bidirectional signal routing in PCI, memory, and mixed-voltage system applications demanding hot-plug resilience and partial-power-down safety.
FAQ
What is the function of the BIASV pin on the 74CBT16800CDGVRE4?
The BIASV pin supplies a user-defined bias voltage (0 V to VCC) that precharges all B-port outputs when the associated output-enable (1OE or 2OE) is high or VCC = 0 V. This precharge minimizes live-insertion noise by holding B-port signals away from receiver input threshold regions during card mating-critical for PCI hot-plug compliance. For 3.3-V systems, BIASV is typically set to 2.4 V.
Does the 74CBT16800CDGVRE4 support true bidirectional analog signal switching?
Yes, the 74CBT16800CDGVRE4 functions as a true bidirectional analog switch with 3 Ω typical ON-state resistance and 15.5 pF Cio(ON). Its FET architecture imposes no inherent directionality, enabling transparent AC/DC signal routing-such as audio paths or sensor outputs-without polarity constraints or added latency in either direction.
How does the 74CBT16800CDGVRE4 handle undershoot events on its A and B ports?
The 74CBT16800CDGVRE4 integrates active undershoot-protection circuitry that detects voltage excursions down to −2 V on both A and B ports and forces the internal switch into a guaranteed OFF state. This prevents false conduction, latch-up, or data corruption during transient negative spikes common in hot-plug and cable-disconnect scenarios.
Can the 74CBT16800CDGVRE4 operate with mixed I/O voltage levels on the same device?
Yes-the 74CBT16800CDGVRE4 supports 0–5.5 V signaling on all A/B port I/Os regardless of VCC (4–5.5 V), enabling simultaneous interfacing with 0.8-V, 1.2-V, 1.5-V, 1.8-V, 2.5-V, 3.3-V, and 5-V logic families. Control inputs accept TTL or CMOS-compatible levels, making it ideal for heterogeneous voltage domain bridging.
What is the significance of Ioff in the 74CBT16800CDGVRE4 datasheet specifications?
Ioff (≤10 µA at VCC = 0 V) specifies the maximum leakage current that flows through the 74CBT16800CDGVRE4 when powered down. This feature ensures no damaging backflow current occurs between live and unpowered system sections-enabling safe partial-power-down operation in multi-rail designs such as portable instruments or modular backplanes.
74CBT16800CDGVRE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74CBT
- Package/Case:
- 48-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Bus Switch
- Circuit:
- 10 x 1:1
- Independent Circuits:
- 2
- 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:
- 48-TVSOP
74CBT16800CDGVRE4 FAQ
1.How can I place an order for 74CBT16800CDGVRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74CBT16800CDGVRE4 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 74CBT16800CDGVRE4 reliable?
The price and inventory of 74CBT16800CDGVRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74CBT16800CDGVRE4 is usually 5 days.
3.What payment methods are accepted for 74CBT16800CDGVRE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74CBT16800CDGVRE4 transactions.
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4.How is shipping managed for 74CBT16800CDGVRE4?
74CBT16800CDGVRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74CBT16800CDGVRE4 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 74CBT16800CDGVRE4?
For technical support, including 74CBT16800CDGVRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74CBT16800CDGVRE4 requirements.
6.How does Aetrix verify that 74CBT16800CDGVRE4 is sourced from the original manufacturer or authorized distributors?
All 74CBT16800CDGVRE4 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 74CBT16800CDGVRE4 meets industry standards.
7.What is the process for return or replacement of 74CBT16800CDGVRE4?
All 74CBT16800CDGVRE4 units undergo pre-shipment inspection (PSI). If there is an issue with 74CBT16800CDGVRE4, 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 74CBT16800CDGVRE4 part is unused and in its original packaging.
Return procedure for 74CBT16800CDGVRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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