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Renesas QS3306AS1G
- Part No.:
- QS3306AS1G
- Manufacturer:
- Renesas
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
QS3306AS1G.pdf
- Description:
- IC BUS SWITCH 1 X 1:1 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,800
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Product details
Overview
QS3306AS1G from Renesas Electronics (formerly IDT) is a high-speed CMOS dual bus switch with individual active-low enables, designed for signal isolation and voltage translation between 5V and 3.3V domains. It features 5Ω typical ON resistance, zero propagation delay, and operates across –40°C to +85°C. Used in hot-swap interfaces and clock gating circuits where ground bounce and timing skew must be eliminated.
For engineers reviewing the QS3306AS1G datasheet, QS3306AS1G pinout, QS3306AS1G application, or QS3306AS1G equivalent, key selection criteria include guaranteed sub-0.25ns propagation delay, ±1μA input leakage, 50pF channel capacitance, industrial temperature rating, and SOIC-8 green package compatibility with legacy TTL/CMOS logic families.
Technical Context
The QS3306AS1G implements two independent N-channel FET switches with no inherent body diode to VCC, enabling bidirectional analog/digital signal routing without DC path constraints. Each channel is controlled by its own active-low enable (1OE/2OE), supporting asynchronous bus isolation and dynamic power gating.
It operates with VCC = 5V ±5%, supports DC switch voltages from –0.5V to +7V, and maintains Hi-Z off-state current ≤±1μA. The device adds no system-level ground bounce and exhibits <0.25ns intrinsic propagation delay - limited only by RC time constant of RON and load capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ON Resistance | 5Ω typical - ensures minimal voltage drop and signal attenuation in 3.3V/5V bidirectional data paths |
| Propagation Delay | <0.25ns - eliminates timing skew in high-speed control and clock gating applications |
| Operating Temp | –40°C to +85°C - qualified for industrial embedded systems and hot-swap backplanes |
| Input Leakage | ±1μA max - preserves signal integrity and reduces standby power in isolated bus segments |
| Channel Capacitance | 5–7pF (off-state) - minimizes capacitive loading on driving sources during Hi-Z operation |
| Supply Voltage | –0.5V to +7V - supports overvoltage-tolerant I/O for mixed-voltage domain interfacing |
| Turn-On/Off Delay | 1.5–6.5ns - enables precise timing control for dynamic bus enable/disable sequencing |
Pinout & Package
QS3306AS1G is packaged in an 8-pin Small Outline IC (SOIC-8), green RoHS-compliant, with standard pin pitch and footprint compatible with JEDEC MS-012AC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A, 2A | Switch Input/Output A-side | Bidirectional signal terminal for first and second bus channel A |
| 1B, 2B | Switch Input/Output B-side | Bidirectional signal terminal for first and second bus channel B |
| 1OE, 2OE | Active-Low Enable Control | Individually disables corresponding switch channel when HIGH |
| VCC | Power Supply | 5V ±5% supply rail; powers internal logic and switch bias circuitry |
| GND | Ground Reference | Common return path for all signals and internal switching currents |
Key Features
| Feature | Design Value |
|---|---|
| No inherent diode to VCC | Enables true bidirectional analog/digital signal routing without forward-bias leakage paths |
| Zero added ground bounce | Eliminates simultaneous switching noise in multi-channel bus isolation scenarios |
| Undershoot clamp diodes | Protects all switch and control inputs against –3V transient undershoot events |
| Low quiescent current | ICCQ ≤3μA - supports always-on monitoring and low-power sleep-mode isolation |
| Hot-swap capable | Rated for safe insertion/removal under live 5V bus conditions per industrial standards |
Applications
| Hot-Swappable Backplane Interface | Multi-Voltage Domain Isolation |
|---|---|
Use Scenario: Insertion/removal of PCIe or CompactPCI cards while main system remains powered. IC Role / Device Role / Timing Role: Bidirectional bus switch isolating card-side signals from backplane during plug-in/out transitions. Use Value: Prevents bus contention and ground bounce spikes that could reset host controllers or corrupt data transfers. | Use Scenario: Interfacing 5V microcontroller GPIOs to 3.3V FPGA configuration pins. IC Role / Device Role / Timing Role: Level-translating bus switch enabling safe voltage-domain bridging without external resistors or level shifters. Use Value: Maintains signal integrity and timing accuracy with <0.25ns delay, eliminating setup/hold violations. |
| Clock Gating for Power Management | Video Signal Blanking |
Use Scenario: Disabling clock distribution to inactive subsystems in battery-powered IoT gateways. IC Role / Device Role / Timing Role: Low-latency clock path switch controlled by PMU-generated enable signals. Use Value: Reduces dynamic power by cutting clock tree activity without introducing jitter or phase discontinuity. | Use Scenario: Suppressing composite video sync pulses during display mode switching in medical monitors. IC Role / Device Role / Timing Role: Analog-capable switch blanking baseband video signals during retrace intervals. Use Value: Achieves clean signal suppression with 5Ω RON and sub-nanosecond switching - no ghosting or overshoot artifacts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT3306CPWR | Higher RON (7Ω typ), same SOIC-8, TI's CBT family with slightly higher ICCD | Compatible for 3.3V/5V translation but less optimal for ultra-low-noise analog video paths | Preferred where TI ecosystem integration or longer production availability is prioritized |
| 74LVC2G66GW,115 | Single-channel, smaller XSON-6 package, 10Ω RON, lower VCC range (1.65–5.5V) | Requires two units for dual-channel function; better suited for space-constrained digital-only designs | Select when board area is critical and dual-channel consolidation is not required |
Compared with SN74CBT3306CPWR and 74LVC2G66GW,115, the QS3306AS1G delivers the lowest ON resistance (5Ω), tightest propagation delay (<0.25ns), and integrated dual-channel architecture - making it optimal for noise-sensitive, timing-critical industrial bus isolation where single-component simplicity and analog-grade performance are essential.
Availability
QS3306AS1G is available at Aetrix Electronics and suitable for hot-swapping, voltage translation, clock gating, and bus isolation applications requiring stable component supply across industrial temperature ranges and long-lifecycle programs.
Supply support for QS3306AS1G 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 QS3306AS1G belongs to Renesas' legacy QuickSwitch® bus switch product line, originally developed by IDT to address high-speed, low-noise signal routing needs in industrial backplanes, computing interconnects, and mixed-voltage system design.
FAQ
What is the maximum operating voltage for QS3306AS1G?
The QS3306AS1G supports a maximum supply voltage (VCC) of +7V and maximum DC switch/input voltage of +7V relative to ground. Absolute maximum ratings specify –0.5V to +7V for all terminals except VCC, which is rated –0.5V to +7V. Operation above 5.25V is outside the specified industrial range and may impact reliability or parametric guarantees.
Does QS3306AS1G support bidirectional signal flow?
Yes, QS3306AS1G supports fully bidirectional signal flow on both 1A↔1B and 2A↔2B channels. Its enhanced N-channel FET structure has no inherent body diode to VCC, eliminating DC blocking and enabling seamless analog or digital signal transmission in either direction without polarity constraints.
Is QS3306AS1G pin-compatible with other QuickSwitch devices?
QS3306AS1G is pin-compatible with the QS3306A family in SOIC-8 (S1G) packaging, including QS3306A, QS3306AS, and QS3306AS1G variants. Pin assignments for 1A, 1B, 1OE, 2A, 2B, 2OE, VCC, and GND are identical across these versions - enabling direct replacement within the same package footprint.
Can QS3306AS1G be used for analog video switching?
Yes, QS3306AS1G is explicitly qualified for analog switching applications including video. Its low 5Ω ON resistance, 7pF off-state capacitance, and absence of ground bounce make it suitable for composite video blanking and RGB signal routing where signal fidelity and fast edge preservation are critical.
What is the thermal performance of QS3306AS1G in continuous operation?
QS3306AS1G has a maximum power dissipation of 0.5W and operates across –40°C to +85°C. With typical RON of 5Ω and max output current of 120mA per channel, junction temperature rise remains within safe limits under normal signal loading. Thermal resistance (θJA) for SOIC-8 is approximately 150°C/W, requiring no heatsink for standard PCB layouts with moderate copper pour.
QS3306AS1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Bus Switch
- Circuit:
- 1 x 1:1
- Independent Circuits:
- 2
- Current - Output High, Low:
- -
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 4.75V ~ 5.25V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
QS3306AS1G FAQ
1.How can I place an order for QS3306AS1G through Aetrix?
Please submit a Request for Quotation (RFQ) for QS3306AS1G 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 QS3306AS1G reliable?
The price and inventory of QS3306AS1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for QS3306AS1G is usually 5 days.
3.What payment methods are accepted for QS3306AS1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for QS3306AS1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for QS3306AS1G?
QS3306AS1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your QS3306AS1G 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 QS3306AS1G?
For technical support, including QS3306AS1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your QS3306AS1G requirements.
6.How does Aetrix verify that QS3306AS1G is sourced from the original manufacturer or authorized distributors?
All QS3306AS1G 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 QS3306AS1G meets industry standards.
7.What is the process for return or replacement of QS3306AS1G?
All QS3306AS1G units undergo pre-shipment inspection (PSI). If there is an issue with QS3306AS1G, 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 QS3306AS1G part is unused and in its original packaging.
Return procedure for QS3306AS1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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