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Renesas QS3VH245SOG8
- Part No.:
- QS3VH245SOG8
- Manufacturer:
- Renesas
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
QS3VH245SOG8.pdf
- Description:
- IC BUS SWITCH 1 X 8:1 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,047
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Product details
Overview
QS3VH245SOG8 from Renesas Electronics (formerly IDT) is an 8-bit bidirectional bus switch IC with N-channel FET architecture, operating at 2.3V–3.6V VCC, delivering <250ps propagation delay, 4Ω typical RON, and 5V-tolerant I/Os-designed for hot-swap isolation in Ethernet LAN switches and high-speed backplane interconnects.
For engineers reviewing the QS3VH245SOG8 datasheet, QS3VH245SOG8 pinout, QS3VH245SOG8 application, or QS3VH245SOG8 equivalent, key selection criteria include rail-to-rail 0–5V analog switching capability, LVTTL-compatible OE control, sub-1ns enable/disable timing, and industrial-grade –40°C to +85°C operation without power sequencing constraints.
Technical Context
The QS3VH245SOG8 implements a true bidirectional, zero-delay bus switch using enhancement-mode N-channel FETs with no parasitic diode to VCC, enabling safe power-off isolation and 5V tolerance in both ON and OFF states. Its architecture eliminates ground bounce and DC paths to supply or ground, supporting hot-plug insertion into live 3.3V systems.
It features flat RON over input voltage (0–5V), matched channel resistance (<1Ω mismatch), and low I/O capacitance (4pF typ. in OFF state). Switching is controlled solely by a single LVTTL-compatible OE input, with no internal logic or level-shifting circuitry-making it a passive signal path when enabled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3V to 3.6V - supports dual-voltage 2.5V/3.3V system interfaces without external level shifters |
| RON (typ) | 4Ω at VCC = 3V - enables low-loss signal pass-through for high-fidelity analog or digital buses |
| Propagation Delay | <0.2ns - adds negligible delay to data paths; system timing dominated by driver/load, not switch |
| I/O Voltage Tolerance | 0V to 5.5V - allows interfacing between 3.3V logic and 5V peripherals or legacy analog signals |
| Off-State Leakage | ±1μA max - ensures robust signal isolation during power-down or hot-swap transitions |
| Bandwidth | Up to 500MHz - supports Fast Ethernet (100BASE-TX) and other high-speed serial signaling |
| Operating Temp | –40°C to +85°C - qualified for industrial embedded and telecom infrastructure environments |
Pinout & Package
QS3VH245SOG8 is packaged in a 20-pin SOIC (Green, RoHS-compliant) with standard pin pitch and footprint. The package supports surface-mount reflow assembly and meets JEDEC MS-013 specifications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OE | Output Enable (active-low) | Controls all 8 channels simultaneously; LOW enables bidirectional conduction, HIGH places A/B ports in high-Z |
| A0–A7 | Port A I/O terminals | Bidirectional data pins; electrically identical to Bx; tolerate 0–5V regardless of VCC state |
| B0–B7 | Port B I/O terminals | Mirror A-side; no directionality-signal flows freely from A to B or B to A when OE is active |
| VCC | Power supply | Supplies gate drive only; no current flows through VCC during signal conduction (no DC path) |
| GND | Ground reference | Return path for undershoot clamp diodes; required for ESD protection and bias stability |
Key Features
| Feature | Design Value |
|---|---|
| No parasitic diode to VCC | Enables true power-off isolation: A/B ports remain disconnected even when VCC = 0V |
| Rail-to-rail analog switching | Supports 0–5V continuous input range with flat RON, preserving signal integrity for audio or sensor interfaces |
| Undershoot clamp diodes | Protects all A, B, and OE pins against –3V transient excursions, enhancing system-level ESD robustness |
| Low I/O capacitance (4pF) | Minimizes loading on high-speed buses and preserves edge rates in >100Mbps applications |
| LVTTL-compatible OE input | Accepts standard 3.3V logic thresholds (VIH ≥ 2.0V, VIL ≤ 0.8V), eliminating need for external translators |
Applications
| Hot-Swappable Module Interface | Fast Ethernet PHY Isolation |
|---|---|
Use Scenario: Insertion/removal of line cards in carrier-grade switches without powering down the backplane. IC Role / Device Role / Timing Role: Bidirectional signal isolator placed between midplane connector and on-card logic; enables zero-downtime maintenance. Use Value: Prevents bus contention and ground bounce during plug events; 5V tolerance accommodates legacy PHY voltages while powered from 3.3V rails. | Use Scenario: Isolating 100BASE-TX differential pairs between MAC and PHY layers in embedded routers. IC Role / Device Role / Timing Role: Transparent analog pass-gate for MDI/MDI-X signal paths; no added jitter or skew across eight lanes. Use Value: Maintains signal fidelity up to 500MHz; low RON and 4pF capacitance preserve rise/fall times required for 100Mbps compliance. |
| Analog Sensor Multiplexing | Legacy Peripheral Interfacing |
Use Scenario: Routing multiple ±10V industrial sensor outputs to a shared ADC input in PLC I/O modules. IC Role / Device Role / Timing Role: Rail-to-rail analog switch managing unidirectional analog signals with minimal THD. Use Value: Flat RON vs. VIN ensures consistent gain across full input range; no DC offset introduced by body diodes. | Use Scenario: Connecting modern 3.3V microcontrollers to 5V UART peripherals or EEPROMs in industrial HMI designs. IC Role / Device Role / Timing Role: Level-agnostic bus bridge enabling mixed-voltage communication without dedicated translators. Use Value: 5V-tolerant I/Os eliminate external level shifters; bidirectional operation supports read/write cycles transparently. |
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 (7Ω typ.), wider VCC range (4.5–5.5V), no 5V tolerance on I/Os when VCC = 3.3V | Requires strict 5V-only operation; unsuitable for mixed-voltage hot-swap where A/B may see 5V while VCC = 3.3V | Select only if system operates exclusively at 5V and does not require power-off isolation |
| PI3CH400QE | Lower bandwidth (300MHz), higher I/O capacitance (6pF), same 2.3–3.6V VCC and 5V I/O tolerance | Slightly reduced signal integrity margin in 100BASE-TX; acceptable for lower-speed industrial buses | Prefer when cost sensitivity outweighs marginal bandwidth loss and layout space is constrained |
Compared with SN74CBT3245APWR and PI3CH400QE, the QS3VH245SOG8 delivers superior high-frequency performance, tighter RON matching, and guaranteed 5V tolerance under partial power conditions-making it the optimal choice for mission-critical hot-swap and Fast Ethernet isolation where signal fidelity and fail-safe behavior are non-negotiable.
Availability
QS3VH245SOG8 is available at Aetrix Electronics and suitable for industrial Ethernet switches, hot-swappable server modules, and mixed-voltage sensor interface designs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for QS3VH245SOG8 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 formed from the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and connectivity solutions for automotive, industrial, and infrastructure markets.
The QS3VH245SOG8 belongs to Renesas' legacy IDT QuickSwitch® portfolio-engineered specifically for high-bandwidth, low-latency signal routing in live-insertion and mixed-voltage system architectures.
FAQ
What is the maximum signal voltage the QS3VH245SOG8 can pass when VCC = 0V?
The QS3VH245SOG8 supports 0V to 5.5V signal voltages on A and B pins regardless of VCC state-including when VCC = 0V-due to its N-channel FET structure with no parasitic diode to VCC. This enables true power-off isolation, a core feature confirmed in the Absolute Maximum Ratings table and Functional Description of the QS3VH245SOG8 datasheet.
Does the QS3VH245SOG8 require external pull-up or pull-down resistors on the OE pin?
No, the QS3VH245SOG8 OE input is LVTTL-compatible with defined VIH (≥2.0V at VCC ≥2.7V) and VIL (≤0.8V) thresholds and has ±1μA leakage-so it can be driven directly from FPGA or MCU GPIO without external biasing. The QS3VH245SOG8 datasheet specifies no requirement for pull resistors, and internal design avoids floating-state sensitivity.
Can the QS3VH245SOG8 be used to switch analog audio signals without distortion?
Yes-the QS3VH245SOG8 supports rail-to-rail 0–5V analog switching with flat RON vs. input voltage and <1Ω channel-to-channel RON mismatch. Its 4Ω typical RON and 4pF OFF-state capacitance minimize harmonic distortion and crosstalk, making it suitable for line-level audio multiplexing as validated in IDT application notes for low-distortion analog switch use cases of the QS3VH245SOG8.
What is the turn-on delay (tPZL) of the QS3VH245SOG8 at VCC = 3.3V?
The QS3VH245SOG8 has a maximum turn-on delay (tPZL) of 7ns at VCC = 3.3V ±0.3V over the full industrial temperature range (–40°C to +85°C), as specified in the Switching Characteristics table. This value reflects the time from OE transition to valid conduction, confirmed across production testing per the QS3VH245SOG8 datasheet revision history.
Is the QS3VH245SOG8 pin-compatible with earlier IDT QS3VH245 variants in SOIC packages?
Yes-the QS3VH245SOG8 uses the same 20-pin SOIC footprint and pinout as all IDT QS3VH245 variants (e.g., QS3VH245SOG, QS3VH245QG), including identical OE, A0–A7, B0–B7, VCC, and GND assignments. The "8" suffix denotes tape-and-reel packaging per the Ordering Information table, with no functional or mechanical changes to the QS3VH245SOG8 die or leadframe.
QS3VH245SOG8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 3VH
- Package/Case:
- 20-SOIC (0.295", 7.50mm 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-SOIC
QS3VH245SOG8 FAQ
1.How can I place an order for QS3VH245SOG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for QS3VH245SOG8 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 QS3VH245SOG8 reliable?
The price and inventory of QS3VH245SOG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for QS3VH245SOG8 is usually 5 days.
3.What payment methods are accepted for QS3VH245SOG8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for QS3VH245SOG8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for QS3VH245SOG8?
QS3VH245SOG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your QS3VH245SOG8 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 QS3VH245SOG8?
For technical support, including QS3VH245SOG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your QS3VH245SOG8 requirements.
6.How does Aetrix verify that QS3VH245SOG8 is sourced from the original manufacturer or authorized distributors?
All QS3VH245SOG8 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 QS3VH245SOG8 meets industry standards.
7.What is the process for return or replacement of QS3VH245SOG8?
All QS3VH245SOG8 units undergo pre-shipment inspection (PSI). If there is an issue with QS3VH245SOG8, 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 QS3VH245SOG8 part is unused and in its original packaging.
Return procedure for QS3VH245SOG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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