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Renesas 74CBTLV6800QG8
- Part No.:
- 74CBTLV6800QG8
- Manufacturer:
- Renesas
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
74CBTLV6800QG8.pdf
- Description:
- IC BUS SWITCH 24QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,479
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Product details
Overview
74CBTLV6800QG8 from Renesas Electronics is a low-voltage 10-bit bus switch with precharged outputs, designed for high-speed 3.3V bus isolation and live-insertion noise suppression. It features 5Ω bi-directional on-state resistance, 2.3V–3.6V supply range, and BIASV-controlled precharge to minimize transients during hot-swap events in industrial backplane systems.
For engineers reviewing the 74CBTLV6800QG8 datasheet, 74CBTLV6800QG8 pinout, 74CBTLV6800QG8 application, or 74CBTLV6800QG8 equivalent, key selection criteria include its 10-kΩ B-port precharge path, OE-controlled high-impedance isolation, over-voltage tolerance up to +4.6V, and industrial −40°C to +85°C operation.
Technical Context
The 74CBTLV6800QG8 implements a single 10-bit bi-directional switch array with one global output-enable (OE) input. Its architecture enables simultaneous A↔B conduction when OE is low, and forces B-port precharge to BIASV via an internal 10-kΩ resistor when OE is high - not a clamping diode or active driver.
It operates across VCC = 2.3V–3.6V with guaranteed RON ≤ 8Ω (typical 5Ω), supports live-insertion by precharging B ports before connection, and maintains isolation under power-off conditions due to inherent FET structure and over-voltage tolerant I/Os rated to ±0.5V beyond rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3V to 3.6V - ensures compatibility with 2.5V and 3.3V logic domains without level translation |
| RON (Max) | 8Ω at VCC = 2.5V, II = 24mA - enables <0.25ns propagation delay into 50pF loads |
| tPD (Max) | 0.25ns at VCC = 3.3V - supports >3GHz signal integrity in high-speed parallel buses |
| BIASV Range | 1.3V to VCC - allows user-selectable precharge voltage to match system reference or reduce ground bounce |
| IOFF (Max) | 50µA at VCC = 0V - guarantees true power-off isolation between A and B ports |
| ESD Rating | 2000V HBM, 200V MM - meets industrial handling requirements without external protection |
| Operating Temp | −40°C to +85°C - qualified for extended-life deployment in uncontrolled industrial enclosures |
Pinout & Package
74CBTLV6800QG8 is packaged in a 24-pin QSOP (PCG24) with 0.635mm pitch, 8.65mm × 3.9mm body, and standard JEDEC MO-137 compliance. Pin numbering follows top-view counterclockwise convention starting from notch or index mark.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 | A1–A10 | Input/Output port A - bidirectional data path connected directly to B when switch enabled |
| 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 | B1–B10 | Input/Output port B - precharged to BIASV via 10-kΩ resistor when OE = high |
| 21 | OE | Active-low output enable - must be pulled up to VCC during power-up to ensure default high-Z state |
| 22 | BIASV | User-supplied bias voltage - sets precharge level for B ports; floats if unused but must be tied to valid rail |
| 23 | VCC | Positive supply - powers internal switch control and precharge circuitry |
| 24 | GND | Ground reference - common return for VCC, BIASV, and all I/O signals |
Key Features
| Feature | Design Value |
|---|---|
| Precharged B-port outputs | Internal 10-kΩ pull-up to BIASV eliminates floating-bus noise during hot-plug insertion |
| Bi-directional 5Ω switch | Low RON minimizes voltage drop and timing skew across all 10 channels simultaneously |
| Power-off isolation | IOFF ≤ 50µA at VCC = 0V prevents back-driving of powered subsystems |
| Over-voltage tolerant I/O | Withstands −0.5V to +4.6V on any pin regardless of VCC state - no external clamps needed |
| Industrial temperature grade | Guaranteed functionality from −40°C to +85°C without derating or thermal management |
Applications
| Backplane Hot-Swap Interface | 3.3V Memory Bus Isolation |
|---|---|
Use Scenario: Inserting/removing line cards in telecom or industrial chassis while main backplane remains powered. IC Role / Device Role / Timing Role: 10-bit bus switch isolating card-side data lines from backplane, with B-port precharged to suppress transient coupling. Use Value: Eliminates live-insertion glitches that would otherwise corrupt memory-mapped register reads or cause FIFO underruns. | Use Scenario: Sharing a single SDRAM controller between two independent memory banks with dynamic arbitration. IC Role / Device Role / Timing Role: Bidirectional data path selector enabling time-multiplexed access to dual DDR modules without signal contention. Use Value: Enables zero-latency switching between banks using OE control synchronized to clock edges - no added setup/hold penalties. |
| PCI/PCI-X Slot Isolation | Legacy ISA-to-USB Bridge Interface |
Use Scenario: Electrically isolating PCI add-in cards during configuration cycles to prevent enumeration conflicts. IC Role / Device Role / Timing Role: High-speed isolation gate placed between slot connector and host bridge, controlled by BIOS-configurable GPIO. Use Value: Prevents spurious ACK# assertions and address decode errors caused by unterminated stubs during cold reset sequences. | Use Scenario: Interfacing legacy ISA peripherals (e.g., industrial DACs) to modern USB-based controllers via FPGA bridge. IC Role / Device Role / Timing Role: Level-shifting and bus-separation element between 5V-tolerant ISA data lines and 3.3V FPGA I/O banks. Use Value: Allows safe 3.3V FPGA to drive 5V-bus peripherals without external level translators or risk of latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT6800PWR | Higher RON (12Ω max), no BIASV pin, fixed GND precharge only | Lacks user-selectable precharge voltage - unsuitable for systems requiring B-port bias above GND | Select when cost sensitivity outweighs precharge flexibility and 3.3V-only operation suffices |
| PI74CBTLV6800ZDE | Same RON spec, identical pinout, but rated only to +70°C commercial temp range | Not qualified for extended industrial ambient; requires thermal derating above 70°C | Select for lab prototypes or indoor consumer-grade systems where full −40°C to +85°C is unnecessary |
Compared with SN74CBT6800PWR and PI74CBTLV6800ZDE, the 74CBTLV6800QG8 uniquely delivers user-configurable BIASV precharge, guaranteed 5Ω RON, and full industrial temperature qualification - making it the only option for robust hot-swap interfaces in harsh environments.
Availability
74CBTLV6800QG8 is available at Aetrix Electronics and suitable for industrial backplane hot-swap, 3.3V memory bus isolation, and PCI slot isolation requiring stable component supply and long-term lifecycle support.
Supply support for 74CBTLV6800QG8 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
Renesas Electronics Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and connectivity solutions for automotive, industrial, infrastructure, and IoT applications.
The 74CBTLV6800QG8 belongs to Renesas' CBTLV family of low-voltage bus switches engineered specifically for high-reliability live-insertion and hot-swap systems operating in extended temperature environments.
FAQ
What is the function of the BIASV pin on the 74CBTLV6800QG8?
The BIASV pin on the 74CBTLV6800QG8 sets the precharge voltage for the B-port outputs when the device is disabled (OE = high). It accepts 1.3V to VCC and connects internally to each B1–B10 terminal through a 10-kΩ resistor, eliminating floating nodes and reducing live-insertion noise. Leaving BIASV unconnected is not recommended - tie to a stable reference or GND if precharge is not required.
Does the 74CBTLV6800QG8 support true bi-directional signal flow?
Yes, the 74CBTLV6800QG8 supports true bi-directional signal flow between A and B ports with near-symmetric RON (≤8Ω) and tPD (<0.25ns). Signal direction is determined solely by external voltage differentials - no internal direction control or asymmetry exists. This enables seamless use in both upstream and downstream data paths within the same 10-bit channel set.
Can the 74CBTLV6800QG8 operate with a 2.5V supply?
Yes, the 74CBTLV6800QG8 is fully specified for VCC = 2.3V to 3.6V, including 2.5V operation. At 2.5V, RON remains ≤8Ω, tPD ≤0.15ns, and all DC parameters (VIH/VIL, IOZ, ICC) meet datasheet limits. System designers may use 2.5V to reduce power or interface with legacy 2.5V logic families without performance penalty.
How does the 74CBTLV6800QG8 achieve power-off isolation?
The 74CBTLV6800QG8 achieves power-off isolation via its FET-based switch architecture and guaranteed IOFF ≤50µA when VCC = 0V. Even with A or B ports biased to active voltages, no significant current flows across the switch. This prevents back-powering of unpowered subsystems and meets IEC 61000-4-5 surge immunity requirements for isolated domains.
Is the 74CBTLV6800QG8 pin-compatible with the 74CBTLV6800PGG8?
No - the 74CBTLV6800QG8 uses a 24-pin QSOP (PCG24) package, while the 74CBTLV6800PGG8 uses a 24-pin TSSOP (PGG24) package. Though both share identical pin functions and electrical specs, their physical footprints differ: QSOP has wider lead spacing (0.635mm vs. 0.65mm), longer leads, and larger body dimensions. PCB layout must be redesigned to swap between them.
74CBTLV6800QG8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 74CBTLV
- Package/Case:
- 24-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Bus Switch
- Circuit:
- -
- Independent Circuits:
- 1
- Current - Output High, Low:
- -
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 2.3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-QSOP
74CBTLV6800QG8 FAQ
1.How can I place an order for 74CBTLV6800QG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74CBTLV6800QG8 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 74CBTLV6800QG8 reliable?
The price and inventory of 74CBTLV6800QG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74CBTLV6800QG8 is usually 5 days.
3.What payment methods are accepted for 74CBTLV6800QG8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74CBTLV6800QG8 transactions.
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4.How is shipping managed for 74CBTLV6800QG8?
74CBTLV6800QG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74CBTLV6800QG8 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 74CBTLV6800QG8?
For technical support, including 74CBTLV6800QG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74CBTLV6800QG8 requirements.
6.How does Aetrix verify that 74CBTLV6800QG8 is sourced from the original manufacturer or authorized distributors?
All 74CBTLV6800QG8 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 74CBTLV6800QG8 meets industry standards.
7.What is the process for return or replacement of 74CBTLV6800QG8?
All 74CBTLV6800QG8 units undergo pre-shipment inspection (PSI). If there is an issue with 74CBTLV6800QG8, 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 74CBTLV6800QG8 part is unused and in its original packaging.
Return procedure for 74CBTLV6800QG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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