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Renesas QS3VH2245PAG8
- Part No.:
- QS3VH2245PAG8
- Manufacturer:
- Renesas
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
QS3VH2245PAG8.pdf
- Description:
- IC BUS SWITCH 1 X 8:1 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,381
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Product details
Overview
QS3VH2245PAG8 from Renesas Electronics (formerly IDT) is an 8-bit high-bandwidth bus switch IC 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 signal switching (0–5V) in hot-swap and high-speed communication systems.
For engineers reviewing the QS3VH2245PAG8 datasheet, QS3VH2245PAG8 pinout, QS3VH2245PAG8 application, or QS3VH2245PAG8 equivalent, key selection criteria include LVTTL-compatible OE control, sub-2ns enable timing, 4pF typical OFF-state I/O capacitance, isolation under power-off conditions, and TSSOP-20 green package compatibility.
Technical Context
The QS3VH2245PAG8 implements eight independent N-channel FET switches without parasitic diodes to VCC, enabling true 5V-tolerant operation in both ON and OFF states and eliminating DC paths to VCC or GND during power-down. Its flat RON vs. VIN profile ensures consistent line matching across the 0–5V input range.
Control logic uses a single active-low Output Enable (OE) signal compatible with LVTTL voltage thresholds (VIH ≥ 2.0V at VCC ≥ 2.7V), driving all eight channels simultaneously with near-zero added ground bounce. Switching is fully bidirectional with no direction pins or internal latching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3V to 3.6V - supports dual-supply 2.5V/3.3V system interfacing without level shifters |
| RON (Typ) | 25Ω at VCC = 3.3V - enables precise impedance matching for high-speed buses up to 20MHz |
| tPLH/tPHL (Max) | 1.35ns at VCC = 3.3V - adds negligible propagation delay in signal path-critical applications |
| CI/O (OFF) | 4pF typical - minimizes capacitive loading on driven lines, preserving signal integrity |
| Input Voltage Range | –0.5V to +5.5V - allows safe interfacing with 5V logic while powered from 3.3V or 2.5V |
| Operating Temp | –40°C to +85°C - qualified for industrial environments without derating |
| IOZ (Max) | ±1μA - ensures high OFF-state isolation for low-leakage analog or hot-swap use cases |
Pinout & Package
QS3VH2245PAG8 is packaged in a RoHS-compliant, lead-free TSSOP-20 (PAG) surface-mount package with 0.65mm pitch and exposed thermal pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 20 | No Connect | Reserved for package mechanical integrity; must remain unconnected |
| 2–9 | A0–A7 | Bidirectional data I/O port A side; 5V-tolerant, 4pF capacitance |
| 11 | OE | Active-low Output Enable; LVTTL-compatible, undershoot clamped |
| 12–19 | B0–B7 | Bidirectional data I/O port B side; electrically identical to A-side |
| 10 | GND | Ground reference for all switch and control circuitry |
| 15 | VCC | Positive supply for internal logic and gate drive; powers OE input buffer only |
Key Features
| Feature | Design Value |
|---|---|
| N-channel FET with no parasitic diode to VCC | Enables true 5V-tolerant operation and zero DC path during power-off - critical for hot-swap safety |
| Rail-to-rail 0–5V switching | Supports full-swing analog and digital signals without clipping or distortion across entire voltage range |
| Flat RON vs. VIN profile | Maintains consistent 25Ω ±5Ω over 0–5V input, ensuring uniform signal attenuation and timing across channels |
| Undershoot clamp diodes on all I/Os | Protects against –3V transient spikes on A/B/OE pins, meeting industrial ESD robustness requirements |
| Bidirectional zero-delay data flow | Eliminates ground bounce and propagation skew between A↔B paths - essential for synchronous bus bridging |
Applications
| Hot-Swappable Backplane Interface | Low-Distortion Analog Signal Routing |
|---|---|
Use Scenario: Insertion/removal of line cards in telecom chassis without powering down the backplane or disrupting active traffic. IC Role / Device Role / Timing Role: Bus switch isolating card-side logic from backplane during insertion; OE controlled by card presence detection. Use Value: Prevents bus contention and ground bounce during live insertion, enabled by 5V tolerance and <1.35ns propagation delay. | Use Scenario: Routing audio or sensor signals between mixed-voltage domains (e.g., 5V sensor → 3.3V ADC) without distortion. IC Role / Device Role / Timing Role: Bidirectional analog pass-gate with rail-to-rail capability and flat RON for minimal THD. Use Value: 4pF OFF-state capacitance and 25Ω matched RON preserve signal fidelity and bandwidth up to 200MHz. |
| ATM Cell Switching Node | Relay Replacement in Industrial PLC I/O Modules |
Use Scenario: High-speed 25/155 Mbps ATM cell forwarding between line interface and switch fabric in edge routers. IC Role / Device Role / Timing Role: Low-latency bus bridge synchronizing data between clock domains with sub-2ns enable timing. Use Value: tPZL/tPHZ ≤ 8ns ensures deterministic switching window alignment with ATM cell boundaries. | Use Scenario: Replacing electromechanical relays in programmable logic controller output modules requiring >1M cycle life and fast response. IC Role / Device Role / Timing Role: Solid-state switch controlling 5V logic-level outputs with isolation during power loss. Use Value: No parasitic diode to VCC guarantees complete isolation when VCC = 0V, preventing backfeed into powered subsystems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT3245APW | Higher RON (26Ω typ), wider VCC range (4.5–5.5V), no 5V tolerance in OFF state | Requires 5V supply; unsuitable for 3.3V-system hot-swap with 5V peripherals | Prefer QS3VH2245PAG8 when 2.5V/3.3V operation and 5V-tolerant isolation are required |
| PI3CH485LE | Lower RON (12Ω typ), but only 3.6V max I/O voltage, no undershoot clamps | Limited to 3.3V-only systems; lacks industrial transient protection | Choose QS3VH2245PAG8 for industrial environments requiring –3V undershoot immunity and 5V signal handling |
Compared with SN74CBT3245APW and PI3CH485LE, the QS3VH2245PAG8 uniquely combines 2.3–3.6V VCC operation, 5V-tolerant I/Os in both states, undershoot clamping, and industrial temperature qualification - making it the only option for robust hot-swap in mixed-voltage industrial backplanes.
Availability
QS3VH2245PAG8 is available at Aetrix Electronics and suitable for hot-swappable backplane interfaces, ATM switching nodes, low-distortion analog routing, and relay-replacement I/O modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for QS3VH2245PAG8 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 SoC solutions for automotive, industrial, infrastructure, and IoT applications.
The QS3VH2245PAG8 belongs to Renesas' legacy QuickSwitch® bus switch family, designed specifically for high-bandwidth, low-distortion, hot-pluggable signal routing in industrial and telecom infrastructure where power-off isolation and 5V tolerance are mandatory.
FAQ
What is the maximum signal voltage the QS3VH2245PAG8 can pass in the ON state?
The QS3VH2245PAG8 supports rail-to-rail switching from 0V to 5V in the ON state. Its N-channel FET architecture with no parasitic diode to VCC allows it to pass signals up to +5.5V (absolute max) while powered from 2.3–3.6V VCC - confirmed in the Absolute Maximum Ratings table. This makes QS3VH2245PAG8 ideal for interfacing 5V peripherals with 3.3V or 2.5V logic domains without external level shifters.
Does the QS3VH2245PAG8 require external pull-up or pull-down resistors on the OE pin?
No, the QS3VH2245PAG8 OE input is LVTTL-compatible with guaranteed VIH ≥ 2.0V and VIL ≤ 0.8V at VCC ≥ 2.7V, and includes internal undershoot clamp diodes. External biasing is unnecessary unless system-level noise immunity requires stronger drive - the OE pin draws only ±1μA leakage current per the DC Electrical Characteristics table, and QS3VH2245PAG8 operates reliably with clean CMOS or LVTTL source signals.
Can the QS3VH2245PAG8 be used in analog applications such as audio signal routing?
Yes, the QS3VH2245PAG8 is explicitly specified for low-distortion analog switching. Its flat 25Ω RON vs. VIN profile, 4pF OFF-state I/O capacitance, rail-to-rail 0–5V operation, and absence of parasitic diodes ensure minimal THD and signal degradation. The datasheet lists "Low distortion analog switch" as a primary application, and QS3VH2245PAG8 has been deployed in telecom audio paths and sensor signal conditioning where channel matching and bandwidth preservation are critical.
What is the thermal performance of the QS3VH2245PAG8 in continuous operation?
The QS3VH2245PAG8 TSSOP-20 package has a junction-to-ambient thermal resistance (θJA) of 120°C/W per the manufacturer's thermal characterization. With typical ICCQ of 2mA at 3.3V (6.6mW static power), and worst-case dynamic power under 12mA (39.6mW), self-heating remains below 5°C rise at room ambient - well within the –40°C to +85°C industrial rating. No heatsink is required for standard PCB layouts with 2oz copper and moderate airflow.
Is the QS3VH2245PAG8 pin-compatible with other QuickSwitch devices like QS3VH244 or QS3VH245?
No, the QS3VH2245PAG8 is not pin-compatible with QS3VH244 or QS3VH245. While all belong to the QuickSwitch family, QS3VH2245PAG8 is an 8-bit switch with OE control and 20-pin TSSOP layout (A0–A7, B0–B7, OE, VCC, GND, NC), whereas QS3VH244 is a dual 4-bit switch and QS3VH245 is a non-inverting 8-bit switch with different pin assignments. Pin mapping must be verified per each device's datasheet - QS3VH2245PAG8's pinout is unique to its functional configuration.
QS3VH2245PAG8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 3VH
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-TSSOP
QS3VH2245PAG8 FAQ
1.How can I place an order for QS3VH2245PAG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for QS3VH2245PAG8 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 QS3VH2245PAG8 reliable?
The price and inventory of QS3VH2245PAG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for QS3VH2245PAG8 is usually 5 days.
3.What payment methods are accepted for QS3VH2245PAG8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for QS3VH2245PAG8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for QS3VH2245PAG8?
QS3VH2245PAG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your QS3VH2245PAG8 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 QS3VH2245PAG8?
For technical support, including QS3VH2245PAG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your QS3VH2245PAG8 requirements.
6.How does Aetrix verify that QS3VH2245PAG8 is sourced from the original manufacturer or authorized distributors?
All QS3VH2245PAG8 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 QS3VH2245PAG8 meets industry standards.
7.What is the process for return or replacement of QS3VH2245PAG8?
All QS3VH2245PAG8 units undergo pre-shipment inspection (PSI). If there is an issue with QS3VH2245PAG8, 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 QS3VH2245PAG8 part is unused and in its original packaging.
Return procedure for QS3VH2245PAG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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