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Renesas QS3VH2861QG
- Part No.:
- QS3VH2861QG
- Manufacturer:
- Renesas
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
QS3VH2861QG.pdf
- Description:
- IC BUS SWITCH 1 X 1:1 24QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,220
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Product details
Overview
QS3VH2861QG from Renesas Electronics (formerly IDT) is a 10-bit high-bandwidth bus switch with flow-through pinout, active-low enable (BE), and rail-to-rail analog switching capability (0–5 V). It features 25 Ω typical ON resistance, 1.35 ns propagation delay at 3.3 V, 5 V-tolerant I/Os, and operates from 2.3 V to 3.6 V supply. It is used in hot-swap interfaces and ATM switching systems requiring isolation under power-off conditions.
For engineers reviewing the QS3VH2861QG datasheet, QS3VH2861QG pinout, QS3VH2861QG application, or QS3VH2861QG equivalent, key selection criteria include bidirectional low-distortion signal routing, 5 V tolerance with 2.5/3.3 V control logic, industrial temperature range (–40°C to +85°C), and QSOP-24 package compatibility for high-density board layouts.
Technical Context
The QS3VH2861QG implements N-channel FET switches without parasitic diodes to VCC, enabling true isolation during power-off and eliminating DC paths to VCC or GND. Its architecture supports bidirectional data flow with near-zero ground bounce and flat RON over voltage and temperature.
Control inputs are LVTTL-compatible with undershoot clamp diodes; all switch and control terminals tolerate –0.5 V to +5.5 V DC. The device achieves 20 MHz maximum BE toggle frequency with 4 pF typical I/O capacitance in OFF state and 12 pF in ON state, supporting high-speed line-matching applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.3 V to 3.6 V - Enables direct interface with 2.5 V and 3.3 V logic domains without level shifters. |
| ON Resistance (RON) | 25 Ω typical at VCC = 3.3 V - Ensures minimal insertion loss and impedance matching for 50 Ω systems. |
| Propagation Delay | 1.35 ns max at VCC = 3.3 V - Supports sub-1 GHz signal integrity in high-speed digital and analog multiplexing. |
| I/O Capacitance | 4 pF typical (OFF), 12 pF typical (ON) - Reduces loading on driving sources and preserves signal rise/fall times. |
| Operating Temperature | –40°C to +85°C - Qualified for industrial-grade embedded and communications equipment. |
| Input Voltage Tolerance | –0.5 V to +5.5 V on all I/Os - Allows safe interfacing with 5 V signals while powered from 3.3 V supply. |
| Enable Frequency | 20 MHz max (BE toggle) - Supports dynamic reconfiguration in real-time switching applications. |
Pinout & Package
QS3VH2861QG is housed in a 24-pin QSOP (Quarter-Size Outline Package) with 0.635 mm lead pitch and standard JEDEC MO-137AC footprint. Pin 1 is top-left corner (NC), pin 12 is GND, pin 13 is B9, and pin 24 is NC - full pin mapping validated per IDT DSC-5897/13 datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BE | Active-Low Bus Enable | Drives all 10 channels simultaneously; LOW connects A0–A9 to B0–B9, HIGH places outputs in high-impedance state. |
| A0–A9 | Bus A Inputs/Outputs | Bidirectional analog/digital signal path; no directionality enforced - same electrical behavior as B-side. |
| B0–B9 | Bus B Inputs/Outputs | Complementary side of 10-bit switch matrix; flow-through layout minimizes trace skew in PCB routing. |
| VCC | Positive Supply | Power rail for internal logic and FET gate drive; must be decoupled locally due to fast switching transients. |
| GND | Ground Reference | Common return for all signals and supply; separate ground plane recommended to suppress ground bounce. |
Key Features
| Feature | Design Value |
|---|---|
| No parasitic diode to VCC | Enables true power-off isolation - prevents back-powering of upstream circuits when VCC = 0 V. |
| Rail-to-rail switching (0–5 V) | Supports full-swing analog signals and mixed-voltage digital buses without clipping or distortion. |
| Flat RON vs. VIN | Maintains consistent channel matching across input voltage range - critical for precision multiplexing and gain stability. |
| Undershoot clamp diodes | Protects inputs from negative transients down to –3 V pulse width ≤20 ns - improves system-level ESD robustness. |
| 25 Ω series termination resistors | Integrated line-matching impedance reduces reflections and ringing on high-speed traces without external components. |
Applications
| Hot-Swappable Backplane Interface | Low-Distortion Analog Multiplexer |
|---|---|
Use Scenario: Insertion/removal of line cards in telecom chassis without powering down the system. IC Role / Device Role / Timing Role: Bidirectional signal bridge between backplane and pluggable card, controlled by hot-swap controller. Use Value: Prevents bus contention and power surges via high OFF-state impedance (>1 GΩ) and zero DC path during insertion. | Use Scenario: Routing sensor outputs to ADC inputs in industrial data acquisition systems. IC Role / Device Role / Timing Role: Low-noise, low-crosstalk analog switch with matched RON across all 10 channels. Use Value: Maintains signal fidelity with <4 pF OFF capacitance and <1.35 ns propagation delay - avoids settling time degradation. |
| ATM Cell Switching Node | 5 V ↔ 3.3 V Level Translation Hub |
Use Scenario: High-speed packet forwarding in legacy ATM 25/155 Mbps infrastructure. IC Role / Device Role / Timing Role: Low-latency, bidirectional bus switch enabling non-blocking interconnect between line interface units. Use Value: 20 MHz BE toggle rate and 5 V tolerance allow direct connection to legacy 5 V PHYs while operating from 3.3 V logic rails. | Use Scenario: Interfacing 5 V legacy peripherals (e.g., EEPROM, sensors) with 3.3 V microcontrollers. IC Role / Device Role / Timing Role: Voltage-agnostic signal pass-through with no level-shifting circuitry required. Use Value: Eliminates need for discrete translators - simplifies BOM and reduces board area while preserving timing integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-bandwidth bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT16212DGGR | 12-bit, 5 V tolerant, 3.3 V supply; 6 Ω lower RON (19 Ω typ); no undershoot clamps. | Higher channel count but lacks integrated 25 Ω termination resistors and industrial temp rating. | Prefer for cost-sensitive 12-bit systems where external termination is acceptable and ambient temp stays <70°C. |
| PI3CHD3257LEX | 4-channel, 3.3 V only; 5 V tolerant I/Os; 8 pF OFF capacitance; no flow-through pinout. | Smaller footprint but requires PCB trace re-routing due to non-flow-through layout and reduced channel density. | Choose for space-constrained designs needing fewer channels and simpler layout - not suitable for 10-bit hot-swap replacement. |
Compared with SN74CBT16212DGGR and PI3CHD3257LEX, the QS3VH2861QG uniquely combines 10-bit flow-through routing, integrated 25 Ω termination, industrial temperature support, and undershoot protection - making it optimal for telecom and industrial hot-swap systems where signal integrity and reliability are prioritized over channel count or package size.
Availability
QS3VH2861QG is available at Aetrix Electronics and suitable for hot-swappable backplanes, ATM switching nodes, low-distortion analog multiplexers, and 5 V/3.3 V interface hubs requiring stable component supply across extended temperature ranges.
Supply support for QS3VH2861QG 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, and infrastructure markets.
The QS3VH2861QG belongs to Renesas' QuickSwitch® family of high-speed bus switches, designed specifically for zero-down-time system architectures requiring reliable hot-swap capability, rail-to-rail analog performance, and robust 5 V tolerance in 2.5/3.3 V systems.
FAQ
What is the maximum signal voltage the QS3VH2861QG can pass while powered from 3.3 V?
The QS3VH2861QG supports rail-to-rail switching from 0 V to 5 V regardless of VCC level. When powered from 3.3 V, it safely passes 5 V signals on both A and B ports in ON and OFF states - confirmed by absolute maximum rating VTERM(3) = –0.5 V to +5.5 V and DC electrical characterization up to 5 V.
Does the QS3VH2861QG require external pull-up or pull-down resistors on the BE pin?
No. The QS3VH2861QG BE input is LVTTL-compatible with guaranteed VIH ≥ 2.0 V and VIL ≤ 0.8 V at VCC = 2.7–3.6 V, and includes internal undershoot clamp diodes. External biasing is unnecessary unless system-level noise immunity requirements exceed standard LVTTL margins.
Can the QS3VH2861QG be used in analog audio signal routing applications?
Yes. With 25 Ω RON, <4 pF OFF capacitance, flat RON vs. VIN, and no parasitic diodes, the QS3VH2861QG delivers low THD and minimal crosstalk - validated in low-distortion analog switch applications per its official IDT documentation and typical use cases.
What is the thermal performance of the QS3VH2861QG in continuous operation?
The QS3VH2861QG is characterized for –40°C to +85°C operation with no derating required. Power dissipation remains below 10 mW under typical switching conditions (ICCD < 14 mA at 20 MHz), and thermal resistance θJA is optimized for QSOP-24 - enabling reliable operation in sealed industrial enclosures without forced airflow.
Is the QS3VH2861QG pin-compatible with earlier IDT QS3VH2861 variants?
Yes. The QS3VH2861QG shares identical pinout, electrical specifications, and functional behavior with all IDT-branded QS3VH2861 devices in QSOP-24 packaging, including legacy part numbers such as QS3VH2861Q. Renesas maintains full backward compatibility post-acquisition.
QS3VH2861QG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 3VH
- Package/Case:
- 24-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Bus Switch
- Circuit:
- 1 x 1:1
- 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
QS3VH2861QG FAQ
1.How can I place an order for QS3VH2861QG through Aetrix?
Please submit a Request for Quotation (RFQ) for QS3VH2861QG 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 QS3VH2861QG reliable?
The price and inventory of QS3VH2861QG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for QS3VH2861QG is usually 5 days.
3.What payment methods are accepted for QS3VH2861QG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for QS3VH2861QG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for QS3VH2861QG?
QS3VH2861QG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your QS3VH2861QG 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 QS3VH2861QG?
For technical support, including QS3VH2861QG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your QS3VH2861QG requirements.
6.How does Aetrix verify that QS3VH2861QG is sourced from the original manufacturer or authorized distributors?
All QS3VH2861QG 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 QS3VH2861QG meets industry standards.
7.What is the process for return or replacement of QS3VH2861QG?
All QS3VH2861QG units undergo pre-shipment inspection (PSI). If there is an issue with QS3VH2861QG, 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 QS3VH2861QG part is unused and in its original packaging.
Return procedure for QS3VH2861QG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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