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Renesas QS3VH861QG8
- Part No.:
- QS3VH861QG8
- Manufacturer:
- Renesas
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
QS3VH861QG8.pdf
- Description:
- IC BUS SWITCH 10 X 1:1 24QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,557
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Product details
Overview
QS3VH861QG8 from Renesas Electronics (formerly IDT) is a 10-bit, high-bandwidth bus switch with flow-through pinout, designed for hot-swap and high-speed data routing in industrial communications systems. It features 4Ω typical ON resistance, <0.2ns propagation delay, 5V-tolerant I/Os, rail-to-rail switching (0–5V), and operates from 2.3V to 3.6V VCC across –40°C to +85°C.
For engineers reviewing the QS3VH861QG8 datasheet, QS3VH861QG8 pinout, QS3VH861QG8 application, or QS3VH861QG8 equivalent, key selection criteria include its bidirectional zero-delay signal path, high OFF-state impedance (>10⁹ Ω), undershoot clamp diodes, LVTTL-compatible BE control, and QSOP-24 packaging for space-constrained LAN switch and hot-plug interfaces.
Technical Context
The QS3VH861QG8 implements N-channel FET switches without parasitic diodes to VCC-enabling true isolation under power-off conditions and eliminating DC paths to VCC or GND. Its 5V tolerance in both ON and OFF states supports mixed-voltage system interfacing, while flat RON over voltage and temperature ensures consistent signal integrity across 0–5V analog or digital signals.
Control is via active-low BE input with LVTTL-compatible thresholds; switching transitions are characterized by tPZH/tPHZ ≤7ns (VCC = 3.3V) and fBE up to 20MHz. The device delivers 500MHz bandwidth with 4pF typical I/O capacitance in OFF state, enabling clean signal pass-through in Fast Ethernet (10/100BASE-T) and ATM 25/155 switching applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3V to 3.6V - supports dual-supply 2.5V/3.3V logic domains without level shifters |
| RON (Typ) | 4Ω at VCC = 3V - enables low-loss signal routing with minimal voltage drop at 30mA load |
| Propagation Delay | <0.2ns - adds negligible latency in high-speed serial or parallel bus paths |
| I/O Capacitance (OFF) | 4pF typical - minimizes loading on source/drain nodes for >500MHz bandwidth |
| Signal Range | Rail-to-rail 0–5V - allows seamless interfacing between 3.3V logic and 5V peripherals |
| Temperature Range | –40°C to +85°C - qualified for industrial-grade embedded networking and telecom equipment |
| Enable Frequency | Up to 20MHz - supports rapid dynamic reconfiguration in packet-switched or hot-swap control loops |
Pinout & Package
QS3VH861QG8 is housed in a 24-pin QSOP (Quarter-Size Outline Package) with 0.635mm lead pitch and standard JEDEC MO-137AC footprint. Pin 1 is NC (no connect); Pin 12 is GND; Pin 13 is B9; Pin 23 is BE (active-low enable).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BE | Active-low bus enable control | Drives all 10 switches simultaneously; LVTTL-compatible with VIH ≥2V (VCC=2.7–3.6V) |
| A0–A9 | Input/output port A (side A) | Bidirectional channel inputs/outputs; 5V tolerant regardless of VCC state |
| B0–B9 | Input/output port B (side B) | Electrically identical to A-side; enables symmetric bus isolation or multiplexing |
| VCC | Positive supply | Powers internal logic only; no current sourced to A/B pins - true level-translating architecture |
| GND | Ground reference | Common return for control logic and switch substrate; decoupling required near Pin 12 |
Key Features
| Feature | Design Value |
|---|---|
| N-channel FET with no parasitic diode to VCC | Enables safe power-off isolation and prevents backfeeding into powered subsystems during hot-swap events |
| Undershoot clamp diodes on all I/O and control pins | Protects against –3V transient excursions (e.g., ESD or cable discharge) without external components |
| Flat RON vs. VIN curve | Maintains consistent insertion loss and rise/fall time across full 0–5V signal swing - critical for analog video or clock distribution |
| High OFF-state impedance (>10⁹ Ω) | Prevents signal leakage between isolated buses, supporting multi-drop or shared-bus architectures |
| Low I/O capacitance (4pF OFF / 8pF ON) | Preserves signal edge rate and minimizes reflections in 50Ω-terminated high-speed links |
Applications
| Hot-Swappable Module Interface | 10/100BASE-T Ethernet Switch Fabric |
|---|---|
Use Scenario: Insertion/removal of line cards in carrier-grade switches without interrupting upstream/downstream traffic. IC Role / Device Role / Timing Role: Bidirectional signal gate isolating card-side logic (3.3V) from backplane (5V), controlled by hot-swap controller's BE signal. Use Value: Enables zero-downtime maintenance using QS3VH861QG8's 5V-tolerant I/Os and power-off isolation - no sequencing required. | Use Scenario: Signal routing between PHY and MAC layers in embedded LAN switches with mixed-voltage design constraints. IC Role / Device Role / Timing Role: Low-latency, low-capacitance bus switch connecting 10/100Mbps MDI-X pairs and MAC interface buffers. Use Value: QS3VH861QG8's <0.2ns delay and 4pF OFF capacitance preserve signal integrity at 100Mbps, avoiding jitter accumulation. |
| Analog Video Signal Routing | ATM Cell Switching (25/155 Mbps) |
Use Scenario: Dynamic selection of composite or component video sources in broadcast monitoring systems. IC Role / Device Role / Timing Role: Rail-to-rail analog switch handling 0–1Vpp CVBS or Y/C signals with minimal distortion and crosstalk. Use Value: QS3VH861QG8's flat RON and 5V signal range maintain linearity and SNR across full video swing - no external bias needed. | Use Scenario: High-speed cell forwarding in telecom access concentrators requiring deterministic latency and voltage translation. IC Role / Device Role / Timing Role: Bidirectional data path between 3.3V ATM SAR controllers and 5V line interface units (LIUs). Use Value: QS3VH861QG8's 20MHz BE toggle rate and 500MHz bandwidth support sustained 155Mbps cell throughput with sub-nanosecond timing margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT16210DGGR | 16-bit, 3.3V-only VCC (2.5–3.6V), higher RON (6Ω typ), no 5V tolerance in OFF state | Limited to 3.3V-only systems; unsuitable for hot-swap isolation where 5V backdrive must be blocked | Select when wider bus width is needed and 5V tolerance is not required |
| PI3CHD3245LEX | 10-bit, 3.3V VCC, 5V-tolerant I/Os, but lacks undershoot clamps and has higher OFF capacitance (8pF) | Less robust against ESD transients; may require external protection in harsh environments | Choose for cost-sensitive designs where transient immunity is secondary to basic switching function |
Compared with SN74CBT16210DGGR and PI3CHD3245LEX, the QS3VH861QG8 uniquely combines 5V tolerance in both ON/OFF states, integrated undershoot clamps, and sub-0.2ns propagation-making it the only option qualified for industrial hot-swap and mixed-voltage Ethernet switch fabric where reliability and signal fidelity are co-critical.
Availability
QS3VH861QG8 is available at Aetrix Electronics and suitable for industrial networking, telecom infrastructure, and embedded hot-swap module design requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant green packaging.
Supply support for QS3VH861QG8 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.
QS3VH861QG8 belongs to Renesas' legacy QuickSwitch® bus switch portfolio-originally developed by IDT-to address high-fidelity, low-latency signal routing in hot-pluggable and mixed-voltage communication systems.
FAQ
What is the maximum operating frequency of the BE control input for QS3VH861QG8?
The QS3VH861QG8 supports a maximum BE toggle frequency of 20MHz under VCC = 3.3V ±0.3V, with no load capacitance on A/B ports and RLOAD ≥1MΩ. This allows rapid reconfiguration in packet-switched or dynamic routing applications. The QS3VH861QG8 datasheet specifies this limit under "Switching Characteristics" with test conditions ensuring 5V signal pass-through and minimal transition jitter.
Does QS3VH861QG8 support true 5V tolerance when VCC is unpowered?
Yes - QS3VH861QG8 maintains 5V tolerance on all A/B and control pins even when VCC = 0V, due to its N-channel FET architecture with no parasitic diode to VCC. This enables safe hot-insertion into live 5V backplanes. The QS3VH861QG8 datasheet confirms IOFF ≤±1μA under these conditions, verifying isolation integrity without external blocking diodes.
What is the typical ON-resistance variation across signal voltage for QS3VH861QG8?
QS3VH861QG8 exhibits flat RON versus VIN: at VCC = 3.3V, RON remains within 4–6Ω across 0–5V input swing, per the "TYPICAL ON RESISTANCE vs VIN" graph. This stability ensures consistent drive strength and minimal harmonic distortion - critical for analog video or clock distribution. The QS3VH861QG8 datasheet characterizes this behavior over full industrial temperature range.
Can QS3VH861QG8 be used for analog signal switching, and what is its bandwidth limit?
Yes - QS3VH861QG8 supports rail-to-rail analog signals (0–5V) with 500MHz small-signal bandwidth and 4pF OFF-state capacitance, making it suitable for composite video, audio, or clock distribution. Its low RON (4Ω typ) and flat response minimize THD and group delay. The QS3VH861QG8 datasheet validates this capability in "SOME APPLICATIONS FOR HOTSWITCH PRODUCTS" and AC electrical tables.
What package type and lead count does QS3VH861QG8 use?
QS3VH861QG8 uses a 24-pin QSOP (Quarter-Size Outline Package) with green (lead-free) finish, denoted by the "QG" suffix in the part number. Pinout follows flow-through topology: A0–A9 and B0–B9 align top-to-bottom for PCB layout efficiency. The QS3VH861QG8 datasheet provides full mechanical drawings and land pattern recommendations in the "ORDERING INFORMATION" section.
QS3VH861QG8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 3VH
- Package/Case:
- 24-SSOP (0.154", 3.90mm 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:
- 2.3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-QSOP
QS3VH861QG8 FAQ
1.How can I place an order for QS3VH861QG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for QS3VH861QG8 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 QS3VH861QG8 reliable?
The price and inventory of QS3VH861QG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for QS3VH861QG8 is usually 5 days.
3.What payment methods are accepted for QS3VH861QG8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for QS3VH861QG8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for QS3VH861QG8?
QS3VH861QG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your QS3VH861QG8 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 QS3VH861QG8?
For technical support, including QS3VH861QG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your QS3VH861QG8 requirements.
6.How does Aetrix verify that QS3VH861QG8 is sourced from the original manufacturer or authorized distributors?
All QS3VH861QG8 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 QS3VH861QG8 meets industry standards.
7.What is the process for return or replacement of QS3VH861QG8?
All QS3VH861QG8 units undergo pre-shipment inspection (PSI). If there is an issue with QS3VH861QG8, 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 QS3VH861QG8 part is unused and in its original packaging.
Return procedure for QS3VH861QG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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