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Renesas QS34XVH2245Q3G
- Part No.:
- QS34XVH2245Q3G
- Manufacturer:
- Renesas
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 80-FSOP (0.154", 3.90mm Width)
- Datasheet:
-
QS34XVH2245Q3G.pdf
- Description:
- IC BUS SWITCH 1 X 8:1 80QVSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,648
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Product details
Overview
QS34XVH2245Q3G 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, and 5V-tolerant I/Os operating from 2.3V–3.6V VCC. It enables bidirectional, rail-to-rail (0–5V), ground-bounce-free signal routing in hot-swap-capable backplane and modular system interfaces.
For engineers reviewing the QS34XVH2245Q3G datasheet, QS34XVH2245Q3G pinout, QS34XVH2245Q3G application, or QS34XVH2245Q3G equivalent, key selection criteria include its industrial-temperature-rated (–40°C to +85°C) 80-pin QVSOP package, LVTTL-compatible OE control, 4pF OFF-state I/O capacitance, and isolation under power-off conditions.
Technical Context
The QS34XVH2245Q3G implements 32 independent N-channel FET switches without parasitic diodes to VCC-ensuring true isolation when powered down and eliminating DC paths to VCC or GND. Each channel supports bidirectional 0–5V analog/digital signals with flat RON over voltage and temperature.
Four independent LVTTL-compatible Output Enable (OE1–OE4) inputs control groups of eight channels each, enabling granular bus segmentation. Switching is governed solely by gate drive logic-no internal clock, PLL, or level-shifting circuitry-delivering near-zero added delay and no ground bounce during state transitions.
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 level shifters |
| RON (Typ.) | 25Ω at VCC = 3.3V - enables precise line matching for high-speed parallel buses up to 20 MHz |
| tPD (Max) | 1.35ns - contributes negligible propagation delay beyond RC time constant of load |
| CI/O (OFF) | 4pF typical - minimizes capacitive loading on driven and driving nets for signal integrity |
| IOFF / IOZ | ±1μA - ensures high OFF-state impedance (>10⁹Ω) for signal isolation in powered-down subsystems |
| Input Tolerance | 5V tolerant on all A/B/OE pins - allows interfacing with mixed-voltage domains without clamping or damage |
| Operating Temp | –40°C to +85°C - qualified for industrial-grade embedded and communications equipment |
Pinout & Package
QS34XVH2245Q3G is housed in an 80-pin QVSOP (Quad Very Small Outline Package) with exposed thermal pad, optimized for high-density PCB layouts and thermal dissipation in multi-switch configurations.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OEx (x=1–4) | Control Input | LVTTL-compatible enable signal; active LOW per group of 8 channels (OE1→A0–B7, OE2→A8–B15, etc.) |
| Ax / Bx (x=0–31) | Bidirectional Switch Terminal | Passive, symmetric I/O pair; no directionality-signal flows A→B or B→A with identical RON and capacitance |
| VCC (pins 1, 55, 56, 72) | Power Supply | Single 2.3–3.6V supply for all 32 switches and control logic; four dedicated pins reduce IR drop |
| GND (pins 6, 49, 50, 79) | Ground Reference | Four low-inductance ground connections minimize switching noise and improve return path integrity |
| NC (pins 1, 73, 74) | No Connect | Unbonded pads-must remain unconnected per design; no internal connection or function |
Key Features
| Feature | Design Value |
|---|---|
| N-channel FET with no parasitic diode to VCC | Enables true power-off isolation: zero DC path between A/B terminals when VCC = 0V |
| Rail-to-rail 0–5V switching | Supports full-swing analog signals and mixed-voltage digital buses without clipping or distortion |
| Flat RON vs. VIN | Maintains consistent 25Ω resistance across input voltage range-critical for impedance-matched transmission lines |
| Undershoot clamp diodes | Protects all A/B/OE pins against –3V transient undershoot, enhancing robustness in noisy environments |
| Excellent RON matching | Channel-to-channel ON-resistance variation < ±5% - preserves timing skew in parallel data paths |
Applications
| Hot-Swappable Backplane Interface | Low-Distortion Analog Multiplexing |
|---|---|
Use Scenario: Insertion/removal of line cards in telecom chassis while main system remains operational. IC Role / Device Role / Timing Role: Bidirectional bus switch isolating card-side logic from backplane during insertion sequence. Use Value: Prevents ground bounce and bus contention via zero-delay switching and 5V-tolerant I/Os during live connect/disconnect. | Use Scenario: Routing multiple sensor outputs to a shared ADC in industrial process monitoring. IC Role / Device Role / Timing Role: Low-noise, rail-to-rail analog switch with minimal THD and crosstalk. Use Value: 4pF OFF-state capacitance and 25Ω flat RON preserve signal fidelity and settling time across 0–5V range. |
| ATM Cell Switching Node | Modular Computing Interconnect |
Use Scenario: High-speed 25/155 Mbps ATM cell forwarding between port processors and switch fabric. IC Role / Device Role / Timing Role: 32-bit parallel data path selector with sub-1.4ns propagation delay and 20 MHz toggle capability. Use Value: Enables deterministic latency and jitter-free cell transfer without added buffering or clock domain crossing. | Use Scenario: Dynamic reconfiguration of memory-mapped peripherals across CPU, FPGA, and ASIC modules. IC Role / Device Role / Timing Role: Voltage-transparent bus bridge supporting mixed 2.5V/3.3V subsystems. Use Value: Eliminates need for level translators; 5V tolerance allows legacy 5V peripherals to coexist on same bus. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-bandwidth bus switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT3245APM | 8-bit configuration (vs. 32-bit); 2.5V–5.5V VCC; 6Ω RON; 0.25ns tPD; 20-pin SOIC | Targeted at smaller-scale, lower-pin-count interconnects; not scalable to full 32-bit bus width | Select when board space is constrained and only 8-bit segmentation is required. |
| PI3CH485QE | 32-bit, 3.3V-only operation; 8Ω RON; 0.3ns tPD; 80-pin TQFP; no 5V tolerance on I/Os | Higher speed but limited to 3.3V systems; lacks hot-swap isolation due to parasitic diodes | Select for maximum bandwidth in 3.3V-only designs where power-off isolation is not required. |
Compared with SN74CBT3245APM and PI3CH485QE, the QS34XVH2245Q3G uniquely combines 32-bit width, 5V I/O tolerance, power-off isolation, and industrial temperature rating-making it the only option for robust, mixed-voltage, hot-swappable backplane switching.
Availability
QS34XVH2245Q3G is available at Aetrix Electronics and suitable for hot-swappable backplane interfaces, ATM switching nodes, modular computing interconnects, and low-distortion analog multiplexing requiring stable component supply across extended temperature ranges.
Supply support for QS34XVH2245Q3G 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.
QS34XVH2245Q3G belongs to Renesas' legacy QuickSwitch® bus switch product line-designed specifically for high-fidelity, low-latency, hot-pluggable signal routing in industrial and telecom infrastructure systems.
FAQ
What is the maximum operating frequency for the QS34XVH2245Q3G's OE control inputs?
The QS34XVH2245Q3G supports a maximum OE toggle frequency of 20 MHz under industrial conditions (VCC = 3.3V, RLOAD ≥ 1MΩ, no CLOAD). This specification ensures reliable enable/disable sequencing in high-speed bus arbitration schemes without metastability or timing violation. The QS34XVH2245Q3G achieves this using fast LVTTL-compatible drivers and low-input capacitance (3–5 pF), minimizing control path delay.
Does the QS34XVH2245Q3G require external pull-up or pull-down resistors on its OE pins?
No, the QS34XVH2245Q3G does not require external pull-up or pull-down resistors on its OE1–OE4 pins. Its LVTTL-compatible inputs have guaranteed VIH (≥2.0V at VCC = 2.7–3.6V) and VIL (≤0.8V) thresholds, and input leakage is limited to ±1 μA. Direct connection to FPGA GPIOs, microcontroller outputs, or logic gates suffices-provided drive strength meets the 30 μA max ΔICC per control input spec.
Can the QS34XVH2245Q3G safely interface a 5V signal source with a 3.3V receiver?
Yes, the QS34XVH2245Q3G can safely interface a 5V signal source with a 3.3V receiver. All A/B/OE pins are 5V tolerant in both ON and OFF states, and the device features undershoot clamp diodes rated for –3V transients. When used with a 3.3V VCC, the QS34XVH2245Q3G passes 5V signals without damage or logic corruption-enabling seamless bridging between legacy 5V peripherals and modern 3.3V subsystems.
What is the thermal performance of the QS34XVH2245Q3G in its 80-pin QVSOP package?
The QS34XVH2245Q3G in 80-pin QVSOP (Q3G) has a junction-to-ambient thermal resistance (θJA) of 42°C/W under standard JEDEC 2-layer board conditions. With typical ICCQ of 8 mA at 3.3V (26.4 mW static power), junction temperature rise remains below 1.2°C at ambient-well within the –40°C to +85°C industrial range. The package includes an exposed thermal pad that must be soldered to a PCB copper pour for optimal heat dissipation.
How does the QS34XVH2245Q3G achieve ground-bounce-free switching?
The QS34XVH2245Q3G achieves ground-bounce-free switching through its N-channel FET architecture with no parasitic diode to VCC and symmetrical bidirectional conduction. Unlike CMOS transmission gates, it avoids charge injection and current spikes during switching transitions. Combined with LVTTL-compatible OE inputs and low 4pF OFF-state I/O capacitance, the QS34XVH2245Q3G eliminates simultaneous switching noise-verified by test waveforms showing no overshoot/undershoot on GND lines during 20 MHz OE toggling.
QS34XVH2245Q3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 34XVH
- Package/Case:
- 80-FSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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
QS34XVH2245Q3G FAQ
1.How can I place an order for QS34XVH2245Q3G through Aetrix?
Please submit a Request for Quotation (RFQ) for QS34XVH2245Q3G 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 QS34XVH2245Q3G reliable?
The price and inventory of QS34XVH2245Q3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for QS34XVH2245Q3G is usually 5 days.
3.What payment methods are accepted for QS34XVH2245Q3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for QS34XVH2245Q3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for QS34XVH2245Q3G?
QS34XVH2245Q3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your QS34XVH2245Q3G 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 QS34XVH2245Q3G?
For technical support, including QS34XVH2245Q3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your QS34XVH2245Q3G requirements.
6.How does Aetrix verify that QS34XVH2245Q3G is sourced from the original manufacturer or authorized distributors?
All QS34XVH2245Q3G 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 QS34XVH2245Q3G meets industry standards.
7.What is the process for return or replacement of QS34XVH2245Q3G?
All QS34XVH2245Q3G units undergo pre-shipment inspection (PSI). If there is an issue with QS34XVH2245Q3G, 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 QS34XVH2245Q3G part is unused and in its original packaging.
Return procedure for QS34XVH2245Q3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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