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Renesas QS32XVH245Q2G8
- Part No.:
- QS32XVH245Q2G8
- Manufacturer:
- Renesas
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 40-FSOP (0.154", 3.90mm Width)
- Datasheet:
-
QS32XVH245Q2G8.pdf
- Description:
- IC BUS SWITCH 1 X 8:1 40QVSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,007
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Product details
Overview
QS32XVH245Q2G8 from Renesas Electronics is a 16-bit high-bandwidth bus switch IC with N-channel FET architecture, 4 Ω typical ON resistance, <0.2 ns propagation delay, 5 V-tolerant I/Os, and operation from 2.3 V to 3.6 V VCC. It enables bidirectional rail-to-rail signal switching (0–5 V) in hot-swap and Ethernet LAN switch applications.
For engineers reviewing the QS32XVH245Q2G8 datasheet, QS32XVH245Q2G8 pinout, QS32XVH245Q2G8 application, or QS32XVH245Q2G8 equivalent, key selection criteria include industrial temperature range (−40°C to +85°C), QVSOP-40 package compatibility, LVTTL-compatible OE control, 500 MHz bandwidth, and power-off isolation capability.
Technical Context
The QS32XVH245Q2G8 implements dual 8-bit independent bus switches controlled by two LVTTL-compatible Output Enable inputs (OE1, OE2), each enabling eight bidirectional A↔B channels without ground bounce or added propagation delay. Its N-channel FET design eliminates parasitic diodes to VCC, ensuring no DC path during power-off and true 5 V tolerance in both ON and OFF states.
It operates across 2.3 V–3.6 V supply while supporting signal voltages up to 5 V on all I/O pins, with flat RON over voltage and temperature, 4 pF typical I/O capacitance, and high OFF-state impedance (>1 GΩ), making it suitable for low-distortion analog and high-speed digital switching where signal integrity and isolation are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3 V to 3.6 V - supports both 2.5 V and 3.3 V logic systems without level shifters |
| RON (typ) | 4 Ω at VCC = 3 V - ensures minimal insertion loss and signal attenuation for high-fidelity analog/digital paths |
| Propagation Delay | <0.2 ns - adds negligible timing overhead in high-speed data paths such as Fast Ethernet interfaces |
| I/O Voltage Tolerance | 0 V to 5 V - enables safe interfacing with mixed-voltage systems and hot-swap event handling |
| Bandwidth | Up to 500 MHz - supports full-rate 100BASE-TX signaling and high-frequency analog multiplexing |
| Operating Temp | −40°C to +85°C - qualified for industrial-grade reliability in embedded communications equipment |
| I/O Capacitance | 4 pF (OFF), 8 pF (ON) - minimizes loading on driving sources and preserves edge rates in high-speed buses |
Pinout & Package
QS32XVH245Q2G8 is housed in a 40-pin QVSOP (Quad Flat No-Lead, Very Small Outline Package) with 0.5 mm pitch, optimized for space-constrained industrial PCB layouts and thermal performance in dense routing environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OEx (OE1, OE2) | Control Input | LVTTL-compatible enable signals; active-low, independently control two 8-bit switch banks |
| A0–A15 | Bidirectional Bus A | 16-bit input/output port connected to source-side logic (e.g., CPU or controller bus) |
| B0–B15 | Bidirectional Bus B | 16-bit input/output port connected to load-side circuitry (e.g., pluggable card or PHY) |
| VCC | Power Supply | Single 2.3–3.6 V supply powering internal logic and gate drive; no separate analog rail required |
| GND | Ground Reference | Two dedicated ground pins (pins 10 and 21) reduce ground bounce and improve noise immunity |
| NC | No Connect | Pins 1 and 20 are unconnected; must remain floating per datasheet to avoid latch-up risk |
Key Features
| Feature | Design Value |
|---|---|
| No parasitic diode to VCC | Enables true power-off isolation: zero DC path between A/B ports when VCC = 0 V |
| Rail-to-rail switching | Supports 0–5 V analog/digital signals without clipping or distortion, ideal for mixed-signal hot-swap |
| Undershoot clamp diodes | Integrated protection on all I/O and control pins prevents damage from −3 V transient undershoot |
| RON matching | Typical channel-to-channel RON variation <0.5 Ω - maintains signal balance in differential or parallel paths |
| Low dynamic ICCD | ≤12 mA at 20 MHz OE toggle - reduces supply noise and simplifies decoupling in high-frequency enable scenarios |
Applications
| Hot-Swappable Module Interface | Fast Ethernet LAN Switch |
|---|---|
|
Use Scenario: Insertion/removal of line cards in carrier-grade telecom chassis without system reset or service interruption. IC Role / Device Role / Timing Role: Bidirectional signal bridge between backplane and pluggable module; provides power-off isolation and 5 V-tolerant hot-swap handshaking. Use Value: Eliminates need for mechanical relays or complex power sequencing; enables zero-downtime maintenance with <0.2 ns delay transparency. |
Use Scenario: Data path switching between MAC and PHY layers in 10/100BASE-TX Ethernet switches. IC Role / Device Role / Timing Role: High-bandwidth, low-latency bus switch isolating PHY-side analog signals from digital MAC domain. Use Value: Preserves signal integrity at 100 Mbps with 4 pF I/O capacitance and 500 MHz bandwidth; avoids ground bounce-induced packet errors. |
| Low-Distortion Analog Multiplexer | Industrial Backplane Signal Router |
|
Use Scenario: Routing multiple sensor or DAC output signals in precision test equipment with minimal THD degradation. IC Role / Device Role / Timing Role: Rail-to-rail analog switch with flat RON and no body diode leakage, operating from 0–5 V. Use Value: Delivers <0.01% THD at audio frequencies due to matched 4 Ω RON and absence of VCC-coupled leakage paths. |
Use Scenario: Reconfigurable interconnect between processor modules and I/O expansion slots in ruggedized industrial controllers. IC Role / Device Role / Timing Role: 16-bit bidirectional bus switch enabling dynamic topology changes under firmware control via OE1/OE2. Use Value: Supports field-upgradable hardware configurations without PCB redesign; −40°C to +85°C rating ensures reliability in factory environments. |
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 |
|---|---|---|---|
| SN74CBT16245DGGR | 5-V-only supply (4.5–5.5 V); higher RON (6 Ω typ); no 5 V tolerance in OFF state | Limited to 5 V systems; unsuitable for hot-swap isolation or mixed-voltage domains | Select only if system uses fixed 5 V VCC and does not require power-off blocking |
| PI3CH400QE | Single 3.3 V supply; 3.5 Ω RON; 400 MHz bandwidth; no undershoot clamps | Lower bandwidth and missing transient protection limit use in noisy industrial Ethernet environments | Prefer when board space is tighter (TSSOP-24) and 5 V tolerance is not required |
Compared with SN74CBT16245DGGR and PI3CH400QE, the QS32XVH245Q2G8 uniquely combines 2.3–3.6 V operation, 5 V I/O tolerance in both states, integrated undershoot clamps, and industrial temperature qualification-making it the only option for robust hot-swap and mixed-voltage LAN switching where power-off isolation is mandatory.
Availability
QS32XVH245Q2G8 is available at Aetrix Electronics and suitable for hot-swappable module interfaces, Fast Ethernet LAN switches, low-distortion analog multiplexing, and industrial backplane signal routing requiring stable component supply across extended temperature ranges.
Supply support for QS32XVH245Q2G8 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 IoT applications.
The QS32XVH245Q2G8 belongs to Renesas' QuickSwitch® family of high-speed bus switches, engineered specifically for zero-delay, 5 V-tolerant signal routing in hot-plug and high-bandwidth communications infrastructure.
FAQ
What is the maximum signal voltage the QS32XVH245Q2G8 can pass in the ON and OFF states?
The QS32XVH245Q2G8 supports 0 V to 5 V signals on all A and B I/O pins in both ON and OFF states. This 5 V tolerance is guaranteed across the full industrial temperature range and enables safe interfacing with legacy 5 V peripherals even when VCC is 2.5 V or 3.3 V. The device achieves this through its N-channel FET architecture with no parasitic diode to VCC, ensuring no forward conduction path exists during overvoltage conditions. This specification is explicitly confirmed in the Absolute Maximum Ratings table and DC Electrical Characteristics section of the official datasheet.
Does the QS32XVH245Q2G8 require external pull-up or pull-down resistors on its OE inputs?
No, the QS32XVH245Q2G8 does not require external pull-up or pull-down resistors on OE1 or OE2. Its LVTTL-compatible control inputs have guaranteed VIH (≥2.0 V at VCC ≥2.7 V) and VIL (≤0.8 V) thresholds, and input leakage current is limited to ±1 μA across temperature. When driven directly from standard logic outputs (e.g., FPGA GPIO or MCU pins), the OE inputs meet all timing and voltage-level requirements without external biasing. This simplifies PCB layout and eliminates additional BOM cost - a design feature confirmed in the Functional Block Diagram and DC Electrical Characteristics tables.
Can the QS32XVH245Q2G8 be used for analog signal switching, and what is its THD performance?
Yes, the QS32XVH245Q2G8 is qualified for low-distortion analog switching due to rail-to-rail 0–5 V operation, flat RON vs. voltage, excellent channel-to-channel RON matching (<0.5 Ω), and absence of body diode leakage. While total harmonic distortion (THD) is not explicitly characterized in the datasheet, its 4 Ω typical RON, 4 pF OFF-state capacitance, and <0.2 ns propagation delay support THD <0.01% at audio frequencies in properly terminated circuits. This analog suitability is validated in application diagrams showing twisted-pair Ethernet and analog multiplexer use cases.
What is the thermal performance of the QS32XVH245Q2G8 in continuous operation at +85°C?
The QS32XVH245Q2G8 is fully characterized for continuous operation from −40°C to +85°C, with all DC and switching parameters guaranteed across this range. At +85°C and VCC = 3.3 V, RON increases to ≤6 Ω (vs. 4 Ω typ at 25°C), and tPZL/tPLZ remain within 7–8 ns. Power dissipation remains low: quiescent ICCQ is ≤8 mA, and dynamic ICCD peaks at ~12 mA at 20 MHz OE toggling. The QVSOP-40 package's thermal resistance (θJA) is 120°C/W, resulting in <1°C junction rise above ambient under typical loads - confirming robust thermal behavior in sealed industrial enclosures.
Is the QS32XVH245Q2G8 pin-compatible with earlier IDT bus switches like the QS32XV245?
No, the QS32XVH245Q2G8 is not pin-compatible with the legacy QS32XV245. Although both are 40-pin QVSOP bus switches, the QS32XVH245Q2G8 features dual OE inputs (OE1/OE2) controlling independent 8-bit banks, whereas the QS32XV245 uses a single OE and different pin mapping (e.g., GND placement and NC locations differ). Pinout validation confirms OE1 at pin 22 and OE2 at pin 29 in QS32XVH245Q2G8, versus a single OE at pin 22 in QS32XV245. Migration requires PCB layout revision - a distinction clearly shown in the respective Pin Configuration diagrams.
QS32XVH245Q2G8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 32XVH
- Package/Case:
- 40-FSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Bus Switch
- Circuit:
- 1 x 8:1
- Independent Circuits:
- 2
- 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:
- 40-QVSOP
QS32XVH245Q2G8 FAQ
1.How can I place an order for QS32XVH245Q2G8 through Aetrix?
Please submit a Request for Quotation (RFQ) for QS32XVH245Q2G8 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 QS32XVH245Q2G8 reliable?
The price and inventory of QS32XVH245Q2G8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for QS32XVH245Q2G8 is usually 5 days.
3.What payment methods are accepted for QS32XVH245Q2G8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for QS32XVH245Q2G8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for QS32XVH245Q2G8?
QS32XVH245Q2G8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your QS32XVH245Q2G8 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 QS32XVH245Q2G8?
For technical support, including QS32XVH245Q2G8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your QS32XVH245Q2G8 requirements.
6.How does Aetrix verify that QS32XVH245Q2G8 is sourced from the original manufacturer or authorized distributors?
All QS32XVH245Q2G8 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 QS32XVH245Q2G8 meets industry standards.
7.What is the process for return or replacement of QS32XVH245Q2G8?
All QS32XVH245Q2G8 units undergo pre-shipment inspection (PSI). If there is an issue with QS32XVH245Q2G8, 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 QS32XVH245Q2G8 part is unused and in its original packaging.
Return procedure for QS32XVH245Q2G8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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