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Renesas QS3VH2245QG
- Part No.:
- QS3VH2245QG
- Manufacturer:
- Renesas
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 20-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
QS3VH2245QG.pdf
- Description:
- IC BUS SWITCH 1 X 8:1 20QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,158
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Product details
Overview
QS3VH2245QG from Renesas Electronics (formerly IDT) is an 8-bit high-bandwidth bus switch with N-channel FET architecture, 25Ω typical ON resistance, 1.35ns max propagation delay at 3.3V, and 5V-tolerant I/Os operating from 2.3V to 3.6V VCC. It enables bidirectional, rail-to-rail (0–5V) signal switching with no added ground bounce-ideal for hot-swap interfaces in telecom backplanes.
For engineers reviewing the QS3VH2245QG datasheet, QS3VH2245QG pinout, QS3VH2245QG application, or QS3VH2245QG equivalent, key selection criteria include its LVTTL-compatible OE control, 4pF typical I/O capacitance, -40°C to +85°C industrial temperature range, and QSOP-20 green package compatibility with legacy QuickSwitch® designs.
Technical Context
The QS3VH2245QG implements eight independent N-channel FET switches without parasitic diodes to VCC, ensuring true isolation during power-off and eliminating DC paths to VCC or GND. Its control logic uses a single active-low Output Enable (OE) input compatible with LVTTL voltage thresholds (VIH = 2.0V min at VCC ≥ 2.7V).
Each switch supports bidirectional signal flow with flat RON over the full 0–5V input range and maintains high OFF-state impedance (>10⁹Ω). Propagation delay is dominated by RC time constant (RON × CL), not internal logic-enabling near-zero-delay pass-through when driving 50pF loads.
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 level shifters |
| RON (Typ) | 25Ω at VCC = 3.3V, VIN = 2.4V - enables precise line matching for 50Ω/75Ω transmission lines |
| tPD (Max) | 1.35ns at VCC = 3.3V, CL = 50pF - adds negligible delay in high-speed data paths |
| I/O Capacitance | 4pF (OFF), 8pF (ON) - minimizes signal distortion and crosstalk in dense PCB layouts |
| Input Voltage Range | -0.5V to +5.5V on all A/B/OE pins - allows safe interfacing with 5V logic while powered from 3.3V |
| Operating Temp | -40°C to +85°C - qualified for industrial-grade embedded and telecom infrastructure use |
| Leakage Current | ±1μA max (IOZ, IOFF) - ensures low standby power and signal integrity in Hi-Z states |
Pinout & Package
QS3VH2245QG is supplied in a 20-pin QSOP (Quarter-Shrink Small Outline Package), 0.65mm pitch, green (lead-free) variant. Package dimensions: 7.2mm × 5.3mm × 1.75mm height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OE | Active-Low Output Enable | Controls all 8 switches simultaneously; LVTTL-compatible with VIH ≥ 2.0V (VCC ≥ 2.7V) |
| A0–A7 | Input/Output Port A | Bidirectional data terminals; 5V tolerant, 4pF capacitance, no DC path to VCC/GND |
| B0–B7 | Input/Output Port B | Matched counterpart to A-side; identical RON and timing characteristics per channel |
| VCC | Positive Supply | Power rail for internal driver only; does not bias switch channels directly |
| GND | Ground Reference | Common return for control logic and switch substrate; separate from signal ground paths |
| NC | No Connect | Pin 1 is unconnected; must be left floating or tied to GND per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog switching | Supports 0V to 5V signals in both ON and OFF states without clamping or distortion |
| Power-off isolation | N-channel FET structure with no parasitic diode to VCC ensures complete signal blocking when VCC = 0V |
| Undershoot clamp diodes | Integrated protection on all A/B/OE pins limits negative transients to -3V (pulse ≤20ns) |
| RON matching | ≤10% variation between channels - critical for skew-sensitive parallel bus applications |
| Low dynamic ICCD | 2mA max at 10MHz OE toggle - reduces supply noise in mixed-signal systems |
Applications
| Hot-Swappable Backplane Interface | ATM Cell Switching Node |
|---|---|
Use Scenario: Insertion/removal of line cards in carrier-grade telecom chassis without powering down the system. IC Role / Device Role / Timing Role: Bidirectional bus switch isolating card-side logic from backplane during insertion; enables zero-downtime maintenance. Use Value: Prevents bus contention and ground bounce via 25Ω RON and 1.35ns tPD, while 5V tolerance accommodates legacy 5V signaling on live backplanes. | Use Scenario: Routing ATM 25/155 Mbps cell streams between ingress/egress ports in edge routers. IC Role / Device Role / Timing Role: Low-skew, low-capacitance signal path selector enabling deterministic latency across multiple parallel data lanes. Use Value: 4pF I/O capacitance and matched RON ensure <10ps inter-channel skew, preserving cell alignment at OC-3/OC-12 rates. |
| Low-Distortion Analog Multiplexer | Relay Replacement in Test Equipment |
Use Scenario: Selecting between multiple sensor inputs (e.g., thermocouples, RTDs) in precision industrial DAQ systems. IC Role / Device Role / Timing Role: Analog switch providing rail-to-rail signal pass-through with minimal THD and no charge injection. Use Value: Flat RON vs. VIN curve and absence of body diodes eliminate signal-dependent gain error and offset drift. | Use Scenario: Replacing electromechanical relays in automated test equipment (ATE) fixture I/O matrices. IC Role / Device Role / Timing Role: Solid-state replacement delivering microsecond switching, >10⁹ cycle lifetime, and no contact wear. Use Value: 25Ω RON and 1.35ns tPD enable fast, repeatable signal routing; 5V tolerance supports mixed-voltage DUT interfaces. |
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 (26Ω typ), wider VCC range (4.5–5.5V), no 5V tolerance on I/Os when VCC = 3.3V | Requires external clamping for 5V signals; suited for pure 5V systems only | Select if operating exclusively at 5V and needing higher drive strength |
| PI3CH485LE | Lower capacitance (3pF), but only 3.3V-only operation and no 5V I/O tolerance | Not suitable for mixed-voltage hot-swap; limited to 3.3V domain signal routing | Prefer for ultra-low-capacitance 3.3V-only applications where 5V tolerance is unnecessary |
Compared with SN74CBT3245APWR and PI3CH485LE, the QS3VH2245QG uniquely combines 5V I/O tolerance at 3.3V VCC, power-off isolation, and sub-nanosecond timing-making it the only option for robust hot-swap and mixed-voltage telecom interface design.
Availability
QS3VH2245QG is available at Aetrix Electronics and suitable for hot-swappable backplane interfaces, ATM switching nodes, low-distortion analog multiplexing, and relay replacement in test equipment requiring stable component supply across extended industrial temperature ranges.
Supply support for QS3VH2245QG 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 QS3VH2245QG belongs to Renesas' legacy QuickSwitch® bus switch family-designed specifically for high-bandwidth, low-noise, bidirectional signal routing in telecom, computing, and instrumentation systems requiring hot-swap capability and voltage-level flexibility.
FAQ
What is the maximum signal voltage the QS3VH2245QG can pass in the ON state?
The QS3VH2245QG supports rail-to-rail switching from 0V to 5V in both ON and OFF states. When powered from 2.3V–3.6V VCC, its I/O pins tolerate up to +5.5V DC and -0.5V undershoot (pulse ≤20ns), making QS3VH2245QG suitable for interfacing 5V logic domains without level shifters or external protection.
Does the QS3VH2245QG require external pull-up or pull-down resistors on the OE pin?
No-QS3VH2245QG features LVTTL-compatible input thresholds with VIH ≥ 2.0V (at VCC ≥ 2.7V) and VIL ≤ 0.8V, allowing direct connection to standard FPGA or ASIC GPIOs. Internal input leakage is ±1μA max, so external biasing is unnecessary unless noise immunity in high-EMI environments is required. The QS3VH2245QG operates reliably with OE driven actively.
Can the QS3VH2245QG be used with VCC = 2.5V, and how does that affect performance?
Yes-QS3VH2245QG is fully characterized for 2.5V ±0.2V operation. At 2.5V, typical RON increases to 27Ω (vs. 25Ω at 3.3V), and max tPD rises to 0.9ns. All DC specs-including 5V I/O tolerance and power-off isolation-remain valid. The QS3VH2245QG maintains full functionality across its 2.3V–3.6V VCC range without derating.
What is the thermal performance of the QS3VH2245QG in continuous operation?
QS3VH2245QG is rated for -40°C to +85°C ambient operation with no derating. Its maximum junction temperature is +125°C, and typical power dissipation is <2mW in static operation (ICCQ = 2mA typ). Under dynamic switching at 10MHz OE toggle, total ICCD remains ≤2mA-ensuring minimal self-heating in QSOP-20 packages even at full industrial temperature extremes.
Is the QS3VH2245QG pin-compatible with earlier IDT QS3VH2245 variants?
Yes-the QS3VH2245QG retains identical pinout, electrical behavior, and timing specs as the original IDT QS3VH2245 in QSOP-20 packaging. Renesas maintains full backward compatibility, including identical absolute maximum ratings, DC characteristics, and switching parameters. Designers may drop in QS3VH2245QG as a direct replacement for legacy IDT-labeled units.
QS3VH2245QG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 3VH
- Package/Case:
- 20-SSOP (0.154", 3.90mm 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-QSOP
QS3VH2245QG FAQ
1.How can I place an order for QS3VH2245QG through Aetrix?
Please submit a Request for Quotation (RFQ) for QS3VH2245QG 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 QS3VH2245QG reliable?
The price and inventory of QS3VH2245QG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for QS3VH2245QG is usually 5 days.
3.What payment methods are accepted for QS3VH2245QG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for QS3VH2245QG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for QS3VH2245QG?
QS3VH2245QG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your QS3VH2245QG 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 QS3VH2245QG?
For technical support, including QS3VH2245QG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your QS3VH2245QG requirements.
6.How does Aetrix verify that QS3VH2245QG is sourced from the original manufacturer or authorized distributors?
All QS3VH2245QG 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 QS3VH2245QG meets industry standards.
7.What is the process for return or replacement of QS3VH2245QG?
All QS3VH2245QG units undergo pre-shipment inspection (PSI). If there is an issue with QS3VH2245QG, 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 QS3VH2245QG part is unused and in its original packaging.
Return procedure for QS3VH2245QG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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