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Renesas QS3VH862QG8
- Part No.:
- QS3VH862QG8
- Manufacturer:
- Renesas
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
QS3VH862QG8.pdf
- Description:
- IC BUS SWITCH 10 X 1:1 24QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,074
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Product details
Overview
QS3VH862QG8 from Renesas Electronics (formerly IDT) is a 10-bit high-bandwidth bus switch with independent active-high (BE) and active-low (BE) enables, designed for hot-swap and high-speed data path isolation in industrial communications systems. It features 4Ω typical ON resistance, <0.2ns propagation delay, 5V-tolerant I/Os, rail-to-rail analog switching (0–5V), and operation from 2.3V to 3.6V VCC.
For engineers reviewing the QS3VH862QG8 datasheet, QS3VH862QG8 pinout, QS3VH862QG8 application, or QS3VH862QG8 equivalent, key selection criteria include bidirectional low-distortion signal routing, power-off isolation capability, undershoot clamp diodes on all I/Os, and compatibility with LVTTL control logic in Ethernet LAN switches and ATM systems.
Technical Context
The QS3VH862QG8 implements N-channel FET bus switches without parasitic diodes to VCC, enabling true isolation during power-off and eliminating DC paths to VCC or GND. Its dual enable architecture allows flexible bus gating: BE asserts high to connect A↔B channels, while BE asserts low for the same function-both independently disable all 10 channels into high-impedance state.
With 4pF typical I/O capacitance (OFF), flat RON over voltage range, and 500MHz bandwidth, it supports fast edge integrity in 10/100Base-T Ethernet physical layer interfaces and live-insertion backplane applications. The device meets industrial temperature requirements (−40°C to +85°C) and guarantees tPLH/tPHL ≤ 0.2ns under load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3V to 3.6V - supports both 2.5V and 3.3V logic domains without level shifters |
| RON (Typ.) | 4Ω at VCC = 3V, VIN = 0V - ensures minimal signal attenuation and voltage drop across switched paths |
| Propagation Delay | <0.2ns - contributes negligible timing skew in high-speed parallel bus or differential pair routing |
| I/O Voltage Tolerance | −0.5V to +5.5V - enables safe interfacing with 5V signals while powered from 3.3V supply |
| Bandwidth | Up to 500MHz - preserves signal integrity for Fast Ethernet (100Mbps) and ATM 155Mbps applications |
| Off-State Leakage | ±1μA max - maintains high channel isolation when disabled, critical for hot-swap reliability |
| Input Capacitance | 3pF (control), 4pF (I/O OFF) - minimizes loading on driving logic and preserves rise/fall times |
Pinout & Package
QS3VH862QG8 is housed in a 24-pin QSOP (Quarter-Size Outline Package) with 0.65mm lead pitch, optimized for space-constrained industrial PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BE | Active-HIGH Bus Enable | Drives all 10 A↔B channels ON when HIGH; no external pull-up required due to LVTTL-compatible input |
| BE | Active-LOW Bus Enable | Drives all 10 A↔B channels ON when LOW; provides redundant enable control for fail-safe system design |
| A0–A9 | Bus A Input/Output Terminals | Bidirectional analog/digital signal ports; 5V-tolerant, rail-to-rail capable, 4pF capacitance |
| B0–B9 | Bus B Input/Output Terminals | Matched impedance and timing to A-side; supports symmetric signal routing in backplane or card-edge interfaces |
| VCC | Positive Supply | 2.3V–3.6V digital core supply; powers internal logic and gate drivers only-not connected to signal path |
| GND | Ground Reference | Common return for control logic and switch substrate; isolated from signal ground by FET structure |
Key Features
| Feature | Design Value |
|---|---|
| No parasitic diode to VCC | Enables full power-off isolation: zero DC path between A/B buses when VCC = 0V |
| Rail-to-rail switching | Supports 0–5V analog or digital signals without clipping, distortion, or level-shifting circuitry |
| Undershoot clamp diodes | Protects all 22 I/O and control pins against −3V transient undershoot, improving ESD robustness |
| Flat RON vs. VIN | Ensures consistent signal attenuation across full input voltage swing-critical for low-distortion analog muxing |
| RON matching between channels | Minimizes skew and crosstalk in parallel data buses; essential for synchronous multi-bit interfaces |
Applications
| Hot-Swappable Module Interface | Fast Ethernet LAN Switch Fabric |
|---|---|
|
Use Scenario: Live insertion/removal of line cards in carrier-grade Ethernet switches without disrupting upstream/downstream traffic. IC Role / Device Role / Timing Role: Bidirectional bus isolator placed between backplane connector and on-card PHY/MAC, controlled by hot-swap supervisor logic. Use Value: Prevents bus contention and power surges during card insertion; 5V tolerance accommodates legacy PHY signaling while VCC runs at 3.3V. |
Use Scenario: Signal routing between MAC controller and multiple 10/100Base-T PHYs in shared-media LAN switches. IC Role / Device Role / Timing Role: High-bandwidth analog switch enabling dynamic PHY port assignment with sub-0.2ns delay impact. Use Value: Eliminates need for discrete relays or complex level translators; flat RON preserves signal integrity across 100Mbps NRZ data. |
| ATM Cell Switching Node | Low-Distortion Analog Multiplexer |
|
Use Scenario: Time-division multiplexing of 25/155Mbps ATM cells across shared backplane resources in telecom access equipment. IC Role / Device Role / Timing Role: Low-latency, high-isolation bus switch enabling non-blocking cell forwarding between SAR and UTOPIA interface layers. Use Value: 500MHz bandwidth supports 155Mbps OC-3 line rates; high OFF impedance (>10⁹Ω) prevents cell corruption from adjacent channel coupling. |
Use Scenario: Precision analog signal routing in industrial data acquisition modules requiring low THD and channel-to-channel matching. IC Role / Device Role / Timing Role: Rail-to-rail analog switch for multiplexing sensor outputs (e.g., thermocouples, strain gauges) into a shared ADC front-end. Use Value: 4Ω RON and flat response minimize gain error and harmonic distortion; 4pF OFF capacitance reduces settling time and crosstalk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT16212DGGR | 16-bit, single active-low enable only; 5Ω RON; 3.3V-only VCC (3.0–3.6V); no 5V tolerance on I/Os | Limited to 3.3V-only systems; lacks dual-enable flexibility and overvoltage protection for mixed-voltage backplanes | Choose when board-level voltage domain is strictly 3.3V and layout space permits larger 48-pin TSSOP package |
| PI3CHD1012LEX | 10-bit, single active-low enable; 3.5Ω RON; 2.5V/3.3V operation; 5V-tolerant I/Os; no undershoot clamps | Missing active-high enable and integrated undershoot protection-requires external TVS for robust hot-swap | Prefer where lowest RON is critical and system-level transient protection is already implemented externally |
Compared with SN74CBT16212DGGR and PI3CHD1012LEX, the QS3VH862QG8 uniquely combines dual-enable control, built-in undershoot clamps, and guaranteed 5V tolerance across all I/Os-making it the only option qualified for zero-downtime industrial hot-swap without supplemental protection circuitry.
Availability
QS3VH862QG8 is available at Aetrix Electronics and suitable for industrial Ethernet switches, telecom ATM nodes, hot-pluggable server modules, and precision analog multiplexers requiring stable component supply across extended temperature and long production lifecycles.
Supply support for QS3VH862QG8 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 QS3VH862QG8 belongs to Renesas' legacy QuickSwitch® bus switch family-originally developed by IDT-to address high-speed, low-distortion signal routing needs in hot-swappable communications and computing platforms.
FAQ
What is the maximum signal voltage the QS3VH862QG8 can pass while powered at 3.3V?
The QS3VH862QG8 supports rail-to-rail analog switching from 0V to 5V on its A and B terminals regardless of VCC voltage. When powered at 3.3V, it safely passes 5V signals in both ON and OFF states due to its 5V-tolerant I/O architecture and absence of parasitic diodes to VCC-enabling interoperability with legacy 5V peripherals without level shifters.
Does the QS3VH862QG8 require external pull-up or pull-down resistors on its BE and BE pins?
No, the QS3VH862QG8 does not require external biasing on BE or BE. Its control inputs are LVTTL-compatible with defined VIH (≥2.0V at VCC = 2.7–3.6V) and VIL (≤0.8V) thresholds, and internal input structures ensure reliable logic recognition without external resistors-reducing BOM count and PCB area in dense switch fabric designs.
How does the QS3VH862QG8 achieve power-off isolation?
The QS3VH862QG8 achieves true power-off isolation via N-channel FET switches with no parasitic diode to VCC. When VCC = 0V, the gate drive is inactive and the channel remains fully open-circuit-even with 5V applied to A or B terminals-ensuring zero DC current flow and preventing back-powering of failed or removed modules in hot-swap systems.
What is the significance of undershoot clamp diodes on all I/O pins of the QS3VH862QG8?
The undershoot clamp diodes on all 22 I/O and control pins limit negative transients to −3V (per Absolute Maximum Ratings), protecting internal circuitry during hot-insertion events where connector mating induces sub-0V spikes. This eliminates the need for external TVS devices in industrial and telecom chassis, simplifying layout and improving system-level ESD immunity without sacrificing bandwidth.
Can the QS3VH862QG8 be used in analog signal paths requiring low THD and flat frequency response?
Yes-the QS3VH862QG8 is specified for low-distortion analog switching: its 4Ω typical RON, flat RON vs. VIN curve, 4pF OFF capacitance, and rail-to-rail 0–5V operation collectively minimize harmonic distortion and amplitude variation across audio and sensor bandwidths. It is documented in applications including low-distortion analog multiplexing and replacement of mechanical relays in precision instrumentation.
QS3VH862QG8 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
QS3VH862QG8 FAQ
1.How can I place an order for QS3VH862QG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for QS3VH862QG8 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 QS3VH862QG8 reliable?
The price and inventory of QS3VH862QG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for QS3VH862QG8 is usually 5 days.
3.What payment methods are accepted for QS3VH862QG8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for QS3VH862QG8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for QS3VH862QG8?
QS3VH862QG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your QS3VH862QG8 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 QS3VH862QG8?
For technical support, including QS3VH862QG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your QS3VH862QG8 requirements.
6.How does Aetrix verify that QS3VH862QG8 is sourced from the original manufacturer or authorized distributors?
All QS3VH862QG8 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 QS3VH862QG8 meets industry standards.
7.What is the process for return or replacement of QS3VH862QG8?
All QS3VH862QG8 units undergo pre-shipment inspection (PSI). If there is an issue with QS3VH862QG8, 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 QS3VH862QG8 part is unused and in its original packaging.
Return procedure for QS3VH862QG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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