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Renesas QS3VH245PAG
- Part No.:
- QS3VH245PAG
- Manufacturer:
- Renesas
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
QS3VH245PAG.pdf
- Description:
- IC BUS SWITCH 1 X 8:1 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,028
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Product details
Overview
QS3VH245PAG from Renesas Electronics (formerly IDT) is an 8-bit bidirectional bus switch IC with N-channel FET architecture, operating at 2.3V–3.6V VCC and supporting rail-to-rail analog/digital signal switching from 0V to 5V. It delivers 4Ω typical ON resistance, <0.2ns propagation delay, and 500MHz bandwidth, enabling hot-swappable Ethernet LAN switch interfaces and high-speed bus isolation.
For engineers reviewing the QS3VH245PAG datasheet, QS3VH245PAG pinout, QS3VH245PAG application, or QS3VH245PAG equivalent, key selection criteria include its LVTTL-compatible OE control, 5V-tolerant I/Os in both ON/OFF states, ultra-low ground bounce, and industrial temperature range (–40°C to +85°C) compliance for embedded communications systems.
Technical Context
The QS3VH245PAG implements a true bidirectional, zero-delay bus switch using N-channel FETs without parasitic diodes to VCC - ensuring isolation during power-off and eliminating DC paths to VCC or GND. Its control logic accepts LVTTL-level OE inputs and drives eight independent A/B channel pairs with matched RON across channels.
It operates as a voltage-transparent analog switch: signals up to 5V pass unattenuated regardless of VCC level (2.3V–3.6V), while maintaining high OFF-state impedance (>10⁹ Ω) and low I/O capacitance (4pF typical in OFF state). This enables use in mixed-voltage domains and hot-swap backplane applications without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3V to 3.6V - supports both 2.5V and 3.3V system rails without external regulators |
| RON (Typ.) | 4Ω at VCC = 3V - enables minimal signal attenuation and distortion for high-fidelity analog/digital bus switching |
| Propagation Delay | <0.2ns - adds negligible timing overhead in high-speed data paths such as Fast Ethernet PHY interfaces |
| I/O Capacitance (OFF) | 4pF typical - reduces loading on driving sources and preserves signal integrity in multi-drop buses |
| Bandwidth | Up to 500MHz - supports 10/100BASE-T Ethernet signaling and wideband analog multiplexing |
| Temperature Range | –40°C to +85°C - qualified for industrial-grade embedded networking and telecom equipment |
| 5V Tolerance | Yes, on all A/B I/O pins in ON and OFF states - allows interfacing with legacy 5V logic without clamping or level shifters |
Pinout & Package
QS3VH245PAG is packaged in a 20-pin TSSOP (Thin Shrink Small Outline Package) with 0.65mm pitch, JEDEC MO-153 compliant, body size 6.5mm × 4.4mm × 1.2mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OE | Output Enable (active-low) | Controls all 8 switches simultaneously; LVTTL-compatible input with undershoot clamp diode |
| A0–A7 | Input/Output port A | Bidirectional data terminal; 5V tolerant, 4pF OFF-state capacitance |
| B0–B7 | Input/Output port B | Bidirectional data terminal; electrically identical to A-side, enabling transparent bus extension |
| VCC | Power supply | Supplies gate drive only; no current path to I/Os - enables true power-off isolation |
| GND | Ground reference | Common return for control logic and switch substrate; separate from signal ground paths in layout-sensitive designs |
Key Features
| Feature | Design Value |
|---|---|
| N-channel FET switches without parasitic diode to VCC | Enables complete signal isolation when VCC = 0V - critical for hot-swap card insertion and system-level power sequencing |
| Rail-to-rail analog switching (0V–5V) | Supports full-swing analog signals and mixed-voltage digital buses without clipping or level translation circuitry |
| Flat RON vs. VIN characteristic | Minimizes harmonic distortion and crosstalk in audio and RF sampling paths across the entire input range |
| Undershoot clamp diodes on all I/O and control pins | Protects against –3V transient excursions per JEDEC standards - improves robustness in noisy industrial environments |
| Excellent RON matching between channels (<5% variation) | Ensures uniform timing skew and amplitude balance across all 8 data lanes - essential for parallel bus integrity |
Applications
| Hot-Swappable Network Interface Card | 10/100BASE-T Ethernet LAN Switch |
|---|---|
Use Scenario: Insertion/removal of pluggable NICs into live chassis without powering down the host system. IC Role / Device Role / Timing Role: Bidirectional bus switch isolating PCI/PCIe address/data lines between card edge connector and host bridge. Use Value: Prevents bus contention and ground bounce during hot-plug events; maintains signal integrity at 100Mbps with sub-0.2ns delay. |
Use Scenario: Signal routing between MAC controller and PHY transceiver in enterprise LAN switches. IC Role / Device Role / Timing Role: Transparent analog switch enabling shared MDI/MDIX line access and PHY selection without added jitter. Use Value: Supports 100BASE-TX full-duplex operation with 500MHz bandwidth and 5V-tolerant I/Os for legacy PHY compatibility. |
| Low-Distortion Audio Multiplexer | Industrial Backplane Bus Isolation |
Use Scenario: Routing multiple analog audio channels in pro-audio mixing consoles with minimal THD+N degradation. IC Role / Device Role / Timing Role: Rail-to-rail analog switch handling ±2.5V peak signals with flat RON across input range. Use Value: Delivers <0.005% THD+N at 1kHz due to 4Ω RON and 4pF OFF capacitance - outperforms mechanical relays. |
Use Scenario: Isolating CPU memory bus segments from peripheral modules in modular PLC or CNC controllers. IC Role / Device Role / Timing Role: High-speed digital bus switch enabling dynamic reconfiguration of DDR2/DDR3 address/data paths. Use Value: Enables deterministic 0.2ns propagation delay and 10⁹Ω OFF impedance - prevents cross-talk between active and dormant modules. |
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 (4.5V–5.5V), no 5V tolerance on I/Os in OFF state | Requires external clamping for 5V signals; limited to 5V-only systems | Prefer when cost sensitivity outweighs 5V tolerance and ultra-low RON requirements |
| PI3CH400QE | Lower bandwidth (300MHz), higher ICCQ (5mA max), same 2.3V–3.6V VCC but no undershoot clamps | Lacks transient protection for industrial ESD-prone environments | Select where lower power consumption is secondary to availability and footprint compatibility |
Compared with SN74CBT3245APWR and PI3CH400QE, the QS3VH245PAG provides superior 5V tolerance, lower RON, and integrated undershoot protection - making it optimal for hot-swap, mixed-voltage, and high-fidelity analog switching where signal fidelity and robustness are prioritized over raw cost reduction.
Availability
QS3VH245PAG is available at Aetrix Electronics and suitable for industrial networking equipment, hot-swappable server modules, and high-speed test instrumentation requiring stable component supply and long-term lifecycle support.
Supply support for QS3VH245PAG 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 QS3VH245PAG belongs to Renesas' legacy QuickSwitch® bus switch family, originally developed by IDT to address high-bandwidth, low-distortion signal routing needs in communications infrastructure and hot-plug systems.
FAQ
What is the maximum signal voltage the QS3VH245PAG can pass in the ON state?
The QS3VH245PAG supports rail-to-rail switching from 0V to 5V in both ON and OFF states. When enabled, it passes signals up to 5V regardless of VCC level (2.3V–3.6V), making it suitable for interfacing 5V peripherals with 3.3V or 2.5V logic domains. This capability is confirmed in the Absolute Maximum Ratings table and functional description of the QS3VH245PAG datasheet.
Does the QS3VH245PAG require external pull-up or pull-down resistors on the OE pin?
No, the QS3VH245PAG OE pin is LVTTL-compatible with defined VIH (≥2.0V at VCC ≥2.7V) and VIL (≤0.8V) thresholds and includes an internal undershoot clamp diode. External biasing is unnecessary unless system-level noise immunity requires stronger static termination - the QS3VH245PAG functions reliably with direct FPGA or MCU GPIO drive.
Can the QS3VH245PAG be used for analog signal switching in audio applications?
Yes, the QS3VH245PAG is widely used for low-distortion analog multiplexing due to its flat RON vs. VIN curve, 4Ω typical ON resistance, and 4pF OFF-state capacitance. Its rail-to-rail 0V–5V operation supports ±2.5V audio signals, and RON matching across channels ensures balanced stereo paths - verified in the Typical ON Resistance vs VIN graph and Applications section of the QS3VH245PAG documentation.
What is the thermal performance of the QS3VH245PAG in continuous operation?
The QS3VH245PAG is characterized for operation from –40°C to +85°C and has a maximum junction temperature of +125°C. With typical quiescent current of 2mA and low dynamic power dissipation (ICCD ≤12mA at 20MHz OE toggle), it remains within safe thermal limits in standard TSSOP PCB layouts with 2 oz copper and minimal copper pour - no heatsink required under normal load conditions.
Is the QS3VH245PAG pin-compatible with other members of the QS3VHxx family?
Yes, the QS3VH245PAG shares identical pinout and package dimensions with other 20-pin variants in the QS3VHxx series (e.g., QS3VH244, QS3VH245), including OE, A0–A7, B0–B7, VCC, and GND assignments. This allows drop-in replacement within the same family for functionally similar designs - confirmed in the Pin Configuration diagram and Ordering Information table for the QS3VH245PAG.
QS3VH245PAG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 3VH
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- 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-TSSOP
QS3VH245PAG FAQ
1.How can I place an order for QS3VH245PAG through Aetrix?
Please submit a Request for Quotation (RFQ) for QS3VH245PAG 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 QS3VH245PAG reliable?
The price and inventory of QS3VH245PAG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for QS3VH245PAG is usually 5 days.
3.What payment methods are accepted for QS3VH245PAG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for QS3VH245PAG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for QS3VH245PAG?
QS3VH245PAG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your QS3VH245PAG 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 QS3VH245PAG?
For technical support, including QS3VH245PAG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your QS3VH245PAG requirements.
6.How does Aetrix verify that QS3VH245PAG is sourced from the original manufacturer or authorized distributors?
All QS3VH245PAG 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 QS3VH245PAG meets industry standards.
7.What is the process for return or replacement of QS3VH245PAG?
All QS3VH245PAG units undergo pre-shipment inspection (PSI). If there is an issue with QS3VH245PAG, 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 QS3VH245PAG part is unused and in its original packaging.
Return procedure for QS3VH245PAG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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