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Renesas QS34XVH2245Q3G8
- Part No.:
- QS34XVH2245Q3G8
- Manufacturer:
- Renesas
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 80-FSOP (0.154", 3.90mm Width)
- Datasheet:
-
QS34XVH2245Q3G8.pdf
- Description:
- IC BUS SWITCH 1 X 8:1 80QVSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,960
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Product details
Overview
QS34XVH2245Q3G8 from Renesas Electronics (formerly IDT) is a 32-bit high-bandwidth bus switch with N-channel FET architecture, 25Ω ON-resistance, 1.35ns max propagation delay at 3.3V, 5V-tolerant I/Os, and operation from –40°C to +85°C. It enables bidirectional, rail-to-rail (0–5V) signal routing in hot-swap-capable backplane and modular system interfaces.
For engineers reviewing the QS34XVH2245Q3G8 datasheet, QS34XVH2245Q3G8 pinout, QS34XVH2245Q3G8 application, or QS34XVH2245Q3G8 equivalent, key selection criteria include LVTTL-compatible OE control, sub-2ns switching timing, 4pF typical OFF-state I/O capacitance, 5V overvoltage tolerance in both ON/OFF states, and QVSOP-80 package compatibility for high-density board layouts.
Technical Context
The QS34XVH2245Q3G8 implements 32 independent N-channel FET switches without parasitic body diodes to VCC, enabling true isolation during power-off and eliminating DC paths to VCC or GND. Each channel supports bidirectional signal flow with near-zero added delay and no ground bounce.
It operates across VCC = 2.3V–3.6V while maintaining 5V tolerance on all A/B I/O pins and OE inputs - critical for mixed-voltage system interfacing. Undershoot clamp diodes are integrated on all switch and control terminals, and RON remains flat across the full 0–5V input range.
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 |
| Propagation Delay (tPLH/tPHL) | ≤1.35ns at VCC = 3.3V - preserves signal integrity in high-speed parallel buses |
| ON Resistance (RON) | Typ. 25Ω - enables precise line matching and low-noise analog/digital switching |
| I/O Capacitance (OFF) | 4pF typical - minimizes loading on driven nets and improves bandwidth |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded and communications equipment |
| Input Voltage Tolerance | –0.5V to +5.5V on all A/B/OE pins - allows safe interfacing with 5V peripherals |
| Enable Frequency (fOEx) | Up to 20MHz - supports high-rate hot-swap control signaling |
Pinout & Package
QS34XVH2245Q3G8 is packaged in an 80-pin QVSOP (Quad Very Small Outline Package), surface-mount, lead-free (Green) variant. The package provides 32 bidirectional data pairs (A0–A31 / B0–B31), four independent LVTTL-compatible Output Enable inputs (OE1–OE4), power (VCC) and ground (GND) distribution across multiple pins, and NC (no-connect) placeholders for mechanical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OEx (x=1–4) | Control Input | LVTTL-compatible enable signal; LOW activates corresponding 8-bit switch group (Ax↔Bx) |
| A0–A31 | Bidirectional I/O | Bus A side of 32 independent FET channels; 5V tolerant, rail-to-rail (0–5V) |
| B0–B31 | Bidirectional I/O | Bus B side of 32 independent FET channels; electrically identical to A-side |
| VCC | Supply | 2.3V–3.6V core supply; distributed across 8 pins to reduce IR drop and noise |
| GND | Reference | Ground reference for all I/O and control; 8 dedicated pins ensure low-impedance return path |
Key Features
| Feature | Design Value |
|---|---|
| N-channel FET with no parasitic diode to VCC | Enables true power-off isolation and eliminates DC leakage paths to supply rails |
| Rail-to-rail switching (0–5V) | Supports analog and digital signals across full voltage range without clipping or distortion |
| Flat RON vs. VIN | Maintains consistent impedance across input swing - critical for impedance-matched transmission lines |
| Undershoot clamp diodes | Protects internal circuitry from negative transients down to –3V (pulse ≤20ns) |
| Low I/O capacitance (4pF OFF) | Reduces capacitive loading on high-speed buses and preserves signal rise/fall times |
Applications
| Hot-Swappable Backplane Interface | ATM Cell Switching System |
|---|---|
Use Scenario: Insertion/removal of line cards in carrier-grade telecom chassis without powering down the system. IC Role / Device Role / Timing Role: Bidirectional signal isolation gate between midplane and pluggable card; controlled by FPGA-managed OE signals. Use Value: Enables zero-downtime maintenance via 5V-tolerant, ground-bounce-free switching with <1.35ns delay - preserving cell timing integrity. |
Use Scenario: Routing ATM 25/155 Mbps data cells between switching fabric and interface ports. IC Role / Device Role / Timing Role: High-bandwidth, low-distortion bus switch for parallel control/data paths in SAR and UTOPIA interfaces. Use Value: 25Ω RON and 4pF OFF capacitance minimize jitter accumulation and intersymbol interference in multi-lane parallel links. |
| Industrial PLC I/O Expansion Module | Low-Distortion Analog Multiplexer |
Use Scenario: Adding isolated digital I/O banks to programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Signal path selector between CPU bus and modular I/O daughterboards; OE-controlled per 8-bit segment. Use Value: –40°C to +85°C rating and robust ESD/clamp protection ensure reliable operation in uncontrolled ambient conditions. |
Use Scenario: Multiplexing sensor signals (e.g., thermocouples, strain gauges) into a shared ADC front-end. IC Role / Device Role / Timing Role: Low-leakage, low-charge-injection analog switch replacing electromechanical relays. Use Value: ±1μA off-state leakage and rail-to-rail capability preserve signal fidelity and dynamic range without external biasing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| QS3VH2245PAG | Same 32-bit function, but in 80-pin TSSOP; higher RON (30Ω typ.), no undershoot clamps | Suitable for cost-sensitive non-industrial designs where PCB space permits larger footprint | Select when QVSOP density is not required and thermal dissipation margin allows higher RON |
| SN74CBT3245APWR | Texas Instruments part; 32-bit, 5V-tolerant, but only rated to 70°C; 6pF OFF capacitance; no undershoot clamps | Applicable in commercial-grade systems with lower ambient temperature requirements | Choose only if industrial temp range is not needed and TI supply chain preference applies |
Compared with QS34XVH2245Q3G8, QS3VH2245PAG offers identical functionality in a less dense package, while SN74CBT3245APWR trades industrial temperature rating and clamping protection for broader distributor availability - making QS34XVH2245Q3G8 the sole option meeting full hot-swap, 5V-tolerance, and –40°C/+85°C requirements simultaneously.
Availability
QS34XVH2245Q3G8 is available at Aetrix Electronics and suitable for hot-swappable backplane interfaces, ATM switching systems, and industrial PLC I/O expansion modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for QS34XVH2245Q3G8 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.
QS34XVH2245Q3G8 belongs to Renesas' legacy QuickSwitch® bus switch portfolio - designed specifically for high-reliability, mixed-voltage signal routing in modular, hot-pluggable systems where signal integrity, power-off isolation, and industrial environmental resilience are mandatory.
FAQ
What is the maximum operating frequency for the OE control inputs of QS34XVH2245Q3G8?
The QS34XVH2245Q3G8 supports an OE toggle frequency up to 20MHz under specified conditions (VCC = 3.3V, RLOAD ≥ 1MΩ, no CLOAD, pass voltage > VCC). This enables rapid reconfiguration of switch groups in real-time system partitioning applications without introducing timing uncertainty into the data path. The QS34XVH2245Q3G8 achieves this using optimized internal driver strength and low-capacitance control nodes.
Does QS34XVH2245Q3G8 support true 5V operation on its A/B I/O pins when VCC is 2.5V?
Yes - the QS34XVH2245Q3G8 is fully 5V-tolerant on all A/B and OE pins regardless of VCC level (2.3V–3.6V). Its N-channel FET structure with no parasitic diode to VCC ensures that 0–5V signals pass unclamped and undistorted in both ON and OFF states. This allows direct interfacing with legacy 5V peripherals while powered from modern 2.5V or 3.3V rails - a key feature confirmed in the Absolute Maximum Ratings table and functional description of QS34XVH2245Q3G8.
What is the OFF-state leakage current specification for QS34XVH2245Q3G8?
The QS34XVH2245Q3G8 specifies ±1μA maximum off-state current (IOZ) across the full operating temperature range (–40°C to +85°C) when any A or B pin is biased between 0V and 5V and all OEx inputs are HIGH. This ultra-low leakage ensures minimal crosstalk and signal corruption in high-impedance or precision analog multiplexing applications. The same ±1μA limit applies to power-off leakage (IOFF) when VCC = 0V - a critical parameter validated in the DC Electrical Characteristics table for QS34XVH2245Q3G8.
Can QS34XVH2245Q3G8 be used in analog signal switching applications?
Yes - the QS34XVH2245Q3G8 is explicitly characterized for low-distortion analog switching. Its rail-to-rail (0–5V) capability, flat 25Ω RON vs. input voltage, 4pF OFF capacitance, and ±1μA leakage make it suitable for multiplexing sensor outputs, audio paths, or other moderate-bandwidth analog signals. The datasheet cites "low distortion analog switch" as a primary application, and the absence of parasitic diodes prevents unwanted conduction or signal clipping - key advantages confirmed in the Features and Applications sections for QS34XVH2245Q3G8.
What package type does QS34XVH2245Q3G8 use, and is it RoHS-compliant?
QS34XVH2245Q3G8 uses the 80-pin QVSOP (Quad Very Small Outline Package) with green (lead-free) finish, as indicated by the "Q3G" suffix in the ordering code. This package meets RoHS Directive 2011/65/EU requirements and is compatible with standard SMT reflow profiles. The QVSOP footprint provides high I/O density and thermal performance suitable for industrial backplanes and telecom modules - a detail confirmed in the Ordering Information and Package section of the QS34XVH2245Q3G8 datasheet.
QS34XVH2245Q3G8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 34XVH
- Package/Case:
- 80-FSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Bus Switch
- Circuit:
- 1 x 8:1
- Independent Circuits:
- 4
- 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:
- 80-QVSOP
QS34XVH2245Q3G8 FAQ
1.How can I place an order for QS34XVH2245Q3G8 through Aetrix?
Please submit a Request for Quotation (RFQ) for QS34XVH2245Q3G8 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 QS34XVH2245Q3G8 reliable?
The price and inventory of QS34XVH2245Q3G8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for QS34XVH2245Q3G8 is usually 5 days.
3.What payment methods are accepted for QS34XVH2245Q3G8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for QS34XVH2245Q3G8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for QS34XVH2245Q3G8?
QS34XVH2245Q3G8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your QS34XVH2245Q3G8 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 QS34XVH2245Q3G8?
For technical support, including QS34XVH2245Q3G8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your QS34XVH2245Q3G8 requirements.
6.How does Aetrix verify that QS34XVH2245Q3G8 is sourced from the original manufacturer or authorized distributors?
All QS34XVH2245Q3G8 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 QS34XVH2245Q3G8 meets industry standards.
7.What is the process for return or replacement of QS34XVH2245Q3G8?
All QS34XVH2245Q3G8 units undergo pre-shipment inspection (PSI). If there is an issue with QS34XVH2245Q3G8, 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 QS34XVH2245Q3G8 part is unused and in its original packaging.
Return procedure for QS34XVH2245Q3G8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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