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Renesas QS3VH245SOG
- Part No.:
- QS3VH245SOG
- Manufacturer:
- Renesas
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
QS3VH245SOG.pdf
- Description:
- IC BUS SWITCH 1 X 8:1 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,964
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Product details
Overview
QS3VH245SOG from Renesas Electronics (formerly IDT) is an 8-bit bidirectional bus switch IC with N-channel FET architecture, 4Ω typical ON resistance, <0.2ns propagation delay, 5V-tolerant I/Os, and operation from 2.3V to 3.6V VCC. It enables hot-swappable, rail-to-rail analog/digital signal routing in high-speed communications backplanes and Ethernet switch fabric.
For engineers reviewing the QS3VH245SOG datasheet, QS3VH245SOG pinout, QS3VH245SOG application, or QS3VH245SOG equivalent, key selection criteria include its 500MHz bandwidth, -40°C to +85°C industrial temperature range, LVTTL-compatible OE control, near-zero ground bounce, and isolation under power-off conditions.
Technical Context
The QS3VH245SOG implements eight independent N-channel FET switches without parasitic diodes to VCC, enabling true 0–5V rail-to-rail analog switching and eliminating DC paths to VCC or GND during power-off. Its control logic uses a single active-low Output Enable (OE) input compatible with LVTTL voltage thresholds.
Each channel exhibits flat RON over voltage and temperature, matched within ±0.5Ω typical, and supports bidirectional data flow with no added propagation delay beyond RC time constant (<0.2ns at 50pF load). Undershoot clamp diodes protect all switch and control inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3V to 3.6V - supports dual-supply systems using 2.5V or 3.3V logic rails |
| RON (Typ.) | 4Ω at VCC = 3.0V - enables low-loss signal transmission up to 500MHz bandwidth |
| Propagation Delay | <0.2ns - adds negligible latency in high-speed bus isolation paths |
| I/O Voltage Tolerance | 0V to 5.5V - allows interfacing between 3.3V logic and 5V analog or legacy buses |
| Off-State Leakage | ±1μA max - ensures high-impedance isolation for hot-swap and system-level power sequencing |
| Operating Temp | -40°C to +85°C - qualified for industrial-grade embedded networking and telecom equipment |
| Input Capacitance | 4pF typical (OFF), 8pF typical (ON) - minimizes loading on high-speed source drivers |
Pinout & Package
QS3VH245SOG is packaged in a 20-pin SOIC (Small Outline Integrated Circuit) with green RoHS-compliant finish (SOG suffix). Pin 1 is NC (No Connect); pins 2–9 and 12–19 are bidirectional A/B data pairs; pin 10 is GND; pin 11 is VCC; pin 20 is OE.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OE | Active-Low Output Enable | Controls all 8 channels simultaneously; L = connect A<sub>x</sub> ↔ B<sub>x</sub>; H = high-impedance isolation |
| A0–A7 | Bidirectional Data Port A | Connects to local-side bus (e.g., CPU, FPGA I/O); 5V tolerant, 4pF capacitance |
| B0–B7 | Bidirectional Data Port B | Connects to remote-side bus (e.g., pluggable card, PHY); identical electrical specs to A-side |
| VCC | Positive Supply | 2.3V–3.6V logic supply; powers internal control circuitry only - not switched path |
| GND | Ground Reference | Common return for control logic and switch substrate; separate from signal ground planes in layout |
Key Features
| Feature | Design Value |
|---|---|
| No parasitic diode to VCC | Enables safe power-off isolation: no current path to VCC or GND when unpowered |
| Rail-to-rail analog switching | Supports 0–5V continuous signals without clipping - suitable for 10/100BASE-T differential analog waveforms |
| RON matching across channels | ±0.5Ω typical mismatch - preserves signal integrity in parallel bus applications like address/data multiplexing |
| Undershoot clamp diodes | Protects all A/B and OE pins against -3V transient undershoot - critical for hot-swap reliability |
| Low dynamic ICCD | 12mA max at 20MHz OE toggle - reduces noise coupling into adjacent high-speed traces |
Applications
| Hot-Swappable Module Interface | Fast Ethernet LAN Switch Fabric |
|---|---|
Use Scenario: Insertion/removal of line cards in carrier-grade switches without powering down the chassis. IC Role / Device Role / Timing Role: Bidirectional bus isolator placed between backplane and module controller to block fault currents and maintain signal integrity during plug-in/out. Use Value: Enables zero-downtime maintenance via controlled power sequencing and 5V-tolerant I/Os that withstand live insertion transients. | Use Scenario: Signal routing between MAC and PHY layers in 10/100BASE-T Ethernet switches. IC Role / Device Role / Timing Role: High-bandwidth analog switch for differential pair routing and impedance-matched signal path isolation. Use Value: Delivers <0.2ns propagation delay and 500MHz bandwidth to preserve 100Mbps eye diagrams without jitter accumulation. |
| Low-Distortion Analog Multiplexer | Legacy Bus Level Translation |
Use Scenario: Routing audio or sensor analog signals in industrial PLC I/O modules. IC Role / Device Role / Timing Role: Rail-to-rail analog switch replacing mechanical relays in programmable gain amplifier front-ends. Use Value: Achieves <0.01% THD+N due to flat RON and absence of body diode conduction - eliminates crossover distortion. | Use Scenario: Interfacing 3.3V microcontrollers with 5V peripheral buses (e.g., legacy UART, SPI, or GPIO expanders). IC Role / Device Role / Timing Role: Level-shifting bus switch supporting bidirectional data flow without direction control pins. Use Value: Eliminates need for discrete level translators or direction-aware buffers - simplifies PCB layout and reduces BOM count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT3245APWR | Higher RON (7Ω typ.), wider VCC range (4.5–5.5V), no 5V tolerance on I/Os when VCC = 3.3V | Requires external clamping for hot-swap transients; limited to 3.3V-only systems | Prefer for cost-sensitive 5V-only designs where 5V I/O tolerance is unnecessary |
| PI3CH485LE | Lower bandwidth (300MHz), higher ICCQ (8mA), no undershoot clamps on I/Os | Lacks transient protection needed for live-insertion; less suitable for telecom-grade reliability | Select when lower power consumption is prioritized over hot-swap robustness |
Compared with SN74CBT3245APWR and PI3CH485LE, the QS3VH245SOG uniquely combines 5V I/O tolerance, undershoot clamps, and sub-0.2ns delay - making it optimal for industrial hot-swap and high-fidelity analog routing where signal fidelity and fault resilience are co-critical.
Availability
QS3VH245SOG is available at Aetrix Electronics and suitable for industrial networking infrastructure, Ethernet switch fabric design, and hot-pluggable module interface development requiring stable component supply and long-term lifecycle support.
Supply support for QS3VH245SOG 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 SoC solutions for automotive, industrial, and infrastructure markets.
The QS3VH245SOG belongs to Renesas' legacy IDT QuickSwitch® bus switch family, engineered specifically for high-reliability hot-swap, Ethernet, and analog signal routing applications demanding zero-delay, 5V-tolerant, and power-off-safe isolation.
FAQ
What is the maximum operating frequency supported by the QS3VH245SOG?
The QS3VH245SOG supports up to 500MHz bandwidth for analog signal switching and 20MHz maximum toggle frequency on the OE control input under specified load conditions. These values are measured with CL = 50pF and reflect its capability to handle Fast Ethernet (100BASE-TX) signaling without degradation. The QS3VH245SOG's low RON and minimal capacitance enable this performance across its full industrial temperature range.
Does the QS3VH245SOG require external pull-up or pull-down resistors on the OE pin?
No, the QS3VH245SOG OE pin has internally biased LVTTL-compatible input thresholds and does not require external biasing. VIH is guaranteed ≥2.0V and VIL ≤0.8V across the full VCC range (2.3V–3.6V), allowing direct connection to standard FPGA or microcontroller GPIO outputs. The QS3VH245SOG datasheet confirms no external resistors are needed for reliable enable/disable operation.
Can the QS3VH245SOG safely interface 5V signals while powered from a 3.3V supply?
Yes - the QS3VH245SOG is explicitly rated for 5V-tolerant I/Os in both ON and OFF states, with absolute maximum ratings up to +5.5V on all A/B pins regardless of VCC voltage. This allows safe interfacing between 3.3V logic domains and 5V peripherals without level shifters. The QS3VH245SOG achieves this via N-channel FET architecture with no parasitic diode to VCC, confirmed in its functional description and absolute maximum ratings table.
What package type does QS3VH245SOG use, and is it RoHS compliant?
The QS3VH245SOG uses a 20-pin SOIC package with green (lead-free, halogen-free) finish, indicated by the "SOG" suffix per IDT/Renesas ordering nomenclature. It complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level 3 (MSL-3). The QS3VH245SOG's SOIC footprint matches industry-standard 0.300-inch wide packages for drop-in compatibility with existing layouts.
How does the QS3VH245SOG achieve isolation during power-off conditions?
The QS3VH245SOG achieves true power-off isolation through its N-channel FET switch architecture with no parasitic diode to VCC. When VCC = 0V, all channels present >10⁹Ω impedance and leakage remains ≤±1μA across 0–5V terminal voltages - verified in DC electrical characteristics. This behavior is intrinsic to the QS3VH245SOG's process design and enables safe backplane hot-swap without risk of back-driving powered subsystems.
QS3VH245SOG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 3VH
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Bus Switch
- Circuit:
- 1 x 8:1
- 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:
- 20-SOIC
QS3VH245SOG FAQ
1.How can I place an order for QS3VH245SOG through Aetrix?
Please submit a Request for Quotation (RFQ) for QS3VH245SOG 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 QS3VH245SOG reliable?
The price and inventory of QS3VH245SOG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for QS3VH245SOG is usually 5 days.
3.What payment methods are accepted for QS3VH245SOG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for QS3VH245SOG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for QS3VH245SOG?
QS3VH245SOG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your QS3VH245SOG 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 QS3VH245SOG?
For technical support, including QS3VH245SOG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your QS3VH245SOG requirements.
6.How does Aetrix verify that QS3VH245SOG is sourced from the original manufacturer or authorized distributors?
All QS3VH245SOG 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 QS3VH245SOG meets industry standards.
7.What is the process for return or replacement of QS3VH245SOG?
All QS3VH245SOG units undergo pre-shipment inspection (PSI). If there is an issue with QS3VH245SOG, 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 QS3VH245SOG part is unused and in its original packaging.
Return procedure for QS3VH245SOG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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