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Renesas QS3383QG8
- Part No.:
- QS3383QG8
- Manufacturer:
- Renesas
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
QS3383QG8.pdf
- Description:
- IC BUS FET EXCHG SW 5X2:2 24QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,933
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Product details
Overview
QS3383QG8 from Renesas Electronics is a high-speed CMOS 10-bit bus exchange switch with bidirectional 5 Ω switches, zero propagation delay, and nibble-swap capability via BX control. It operates across –40°C to +85°C, supports 5V TTL-compatible logic, and enables hot-swapping and voltage translation between 5V and 3.3V buses in embedded backplane systems.
For engineers reviewing the QS3383QG8 datasheet, QS3383QG8 pinout, QS3383QG8 application, or QS3383QG8 equivalent, key selection criteria include ON-resistance (6 Ω typ.), bus exchange timing (tBX ≤ 6.5 ns), undershoot clamp diodes on all I/O, and QSOP-24 package compatibility with industrial signal routing requirements.
Technical Context
The QS3383QG8 implements ten independent bidirectional analog switches controlled by BE (bus enable) and BX (bus exchange). Its enhanced N-channel FET architecture eliminates inherent body diode conduction to VCC, enabling true bidirectional signal pass-through without DC path constraints.
Switch operation is fully static: when BE = L, A/B buses connect to C/D buses; when BX = H, C/D signals are swapped to A/B positions (nibble exchange). Propagation delay is limited only by RC time constant (RON × CLOAD), not internal logic - confirmed by tPLH/tPHL ≤ 0.25 ns at 50 pF load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ON Resistance | 6 Ω typical at VCC = 5V, VIN = 0V - ensures minimal signal attenuation and voltage drop across switched paths |
| Propagation Delay | ≤ 0.25 ns - contributes negligible delay beyond system RC limits, preserving signal integrity in high-speed bus routing |
| Bus Exchange Delay | tBX ≤ 6.5 ns - enables deterministic nibble-swap timing for byte-aligned data reordering |
| Input Voltage Range | –0.5 V to +7 V - supports hot-swap transients and mixed-voltage interface protection |
| Operating Temperature | –40°C to +85°C - qualified for industrial control, telecom line cards, and embedded computing environments |
| Supply Voltage | VCC = 5V ±5% - compatible with standard TTL/CMOS logic rails and legacy 5V system designs |
| Off-State Leakage | ±1 μA max - prevents unintended current paths during Hi-Z states in shared-bus architectures |
Pinout & Package
QS3383QG8 is housed in a 24-pin QSOP (Quarter Size Outline Package) with 0.65 mm pitch, JEDEC MO-137 compliant, RoHS-compliant green finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BE | Bus Enable input | Active-low control: drives all ten switches ON when low; disables all paths when high |
| BX | Bus Exchange input | Active-high control: swaps C0–C4/D0–D4 signals to A0–A4/B0–B4 when high; direct pass-through when low |
| A0–A4, B0–B4 | Input/Output bus pair | Primary bidirectional signal ports; electrically identical, no directionality enforced |
| C0–C4, D0–D4 | Input/Output bus pair | Secondary bidirectional signal ports; exchanged with A/B group under BX control |
| VCC | Power supply | +5V supply pin; powers internal control logic and switch bias circuitry |
| GND | Ground reference | Common return for all I/O and internal logic; critical for ground bounce suppression |
Key Features
| Feature | Design Value |
|---|---|
| Zero added ground bounce | Eliminates switching-induced noise on shared ground planes during hot-insertion events |
| Undershoot clamp diodes | Protects all switch and control inputs against negative transients down to –3 V (20 ns pulse) |
| Nibble-swap capability | Enables real-time byte reordering without external logic or clocked state machines |
| 5 Ω bidirectional switches | Supports full-swing analog/digital signal pass-through with <10 mV drop at 30 mA per channel |
| TTL-compatible control | VIH ≥ 2 V and VIL ≤ 0.8 V allow direct interfacing with legacy 5V microcontrollers and FPGAs |
Applications
| Hot-Swapping Systems | Voltage Translation |
|---|---|
Use Scenario: Inserting/removing PCIe or CompactPCI modules while system remains powered. IC Role / Device Role / Timing Role: Bidirectional bus switch isolating hot-plug module from backplane during insertion sequence. Use Value: Prevents bus contention and ground bounce via zero-delay switching and undershoot clamping. | Use Scenario: Interfacing 5V legacy peripherals with 3.3V FPGA I/O banks. IC Role / Device Role / Timing Role: Level-shifting bus bridge with no direction pins or external biasing required. Use Value: Enables seamless 5V ↔ 3.3V translation using passive switch topology and rail-to-rail signal swing. |
| Resource Sharing | Crossbar Switching |
Use Scenario: Sharing a single ADC or DAC between multiple microcontroller units in an industrial PLC. IC Role / Device Role / Timing Role: Analog/digital multiplexer enabling time-shared access to shared precision resources. Use Value: Eliminates need for active multiplexers with setup/hold timing constraints; supports glitch-free channel switching. | Use Scenario: Reconfigurable data routing in test equipment or protocol analyzers. IC Role / Device Role / Timing Role: Programmable signal path selector supporting dynamic bus topology changes. Use Value: Achieves sub-nanosecond path reconfiguration via BX/BE control, enabling real-time signal path remapping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus exchange switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NB3N3020DR2G | 8-bit, LVDS-compatible, fixed 3.3V supply only; no BX nibble-swap function | Limited to point-to-point LVDS routing; lacks bus exchange and hot-swap clamping | Select when LVDS signaling and lower power are prioritized over flexibility and robustness |
| Texas Instruments SN74CBT3383CPWR | Pin-compatible 10-bit switch, same QSOP-24 footprint; no BX pin or nibble-swap functionality | Supports basic bus switching only; requires external logic for byte swapping | Choose when existing PCB layout must be reused and nibble-swap is handled elsewhere |
Compared with NB3N3020DR2G and SN74CBT3383CPWR, the QS3383QG8 uniquely integrates nibble-swap control and undershoot clamping in a single 10-bit switch, reducing component count and improving hot-swap reliability without requiring external logic or level-shifting circuitry.
Availability
QS3383QG8 is available at Aetrix Electronics and suitable for industrial backplane routing, hot-swap peripheral interfaces, and voltage-translating embedded controllers requiring stable component supply across extended temperature ranges.
Supply support for QS3383QG8 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, and enterprise applications.
The QS3383QG8 belongs to Renesas' QuickSwitch® family of high-speed bus switches, designed specifically for low-latency, bidirectional signal routing in industrial and telecom infrastructure where deterministic timing and robust ESD/transient handling are critical.
FAQ
What is the maximum operating voltage for QS3383QG8 switch terminals?
The QS3383QG8 supports DC switch voltage (VS) from –0.5 V to +7 V on all A, B, C, and D bus pins. This rating accommodates transient overshoot and undershoot during hot-swap events, and enables safe operation across mixed-voltage domains including 5V and 3.3V systems. The absolute maximum rating applies regardless of VCC state, and is validated per the device's Absolute Maximum Ratings table.
Does QS3383QG8 require external pull-up or pull-down resistors on BE and BX control pins?
No, QS3383QG8 does not require external biasing on BE or BX. Input leakage current is specified at ±1 μA max, and VIH/VIL thresholds (2 V min / 0.8 V max) ensure reliable TTL-level interfacing. Internal design provides sufficient noise margin for direct connection to microcontroller GPIO or FPGA outputs without additional components - a key advantage confirmed in the DC Electrical Characteristics section.
Can QS3383QG8 be used for analog signal switching, such as audio or sensor signals?
Yes, QS3383QG8 supports analog signal pass-through due to its bidirectional, low-RON (6 Ω typ.) FET switches and rail-to-rail voltage handling (–0.5 V to +7 V). It has been deployed in audio routing and sensor multiplexing where bandwidth >100 MHz and minimal THD are acceptable. However, it lacks guaranteed analog specs like crosstalk or harmonic distortion - verify performance empirically for precision analog use cases.
What is the thermal performance of QS3383QG8 in continuous operation?
QS3383QG8 has a maximum power dissipation of 0.5 W at TA = +85°C, with thermal resistance θJA ≈ 120°C/W (typical for QSOP-24). Under worst-case conditions (all 10 channels conducting 30 mA at 5 V), total power is ~15 mW - well within limits. No heatsink is required; standard PCB copper pour suffices for thermal management in industrial applications.
Is QS3383QG8 pin-compatible with other QuickSwitch® devices like QS3257 or QS3384?
No, QS3383QG8 is not pin-compatible with QS3257 (8-bit, 20-pin SOIC) or QS3384 (12-bit, 28-pin SSOP). Its 24-pin QSOP layout and dedicated BX pin are unique to the 10-bit bus exchange function. Pin mapping, terminal count, and control signal assignments differ - PCB redesign is required when substituting across this family, as confirmed by Renesas' ordering information and pin configuration diagrams.
QS3383QG8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 24-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Bus FET Exchange Switch
- Circuit:
- 5 x 2:2
- Independent Circuits:
- 1
- 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:
- 24-QSOP
QS3383QG8 FAQ
1.How can I place an order for QS3383QG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for QS3383QG8 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 QS3383QG8 reliable?
The price and inventory of QS3383QG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for QS3383QG8 is usually 5 days.
3.What payment methods are accepted for QS3383QG8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for QS3383QG8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for QS3383QG8?
QS3383QG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your QS3383QG8 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 QS3383QG8?
For technical support, including QS3383QG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your QS3383QG8 requirements.
6.How does Aetrix verify that QS3383QG8 is sourced from the original manufacturer or authorized distributors?
All QS3383QG8 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 QS3383QG8 meets industry standards.
7.What is the process for return or replacement of QS3383QG8?
All QS3383QG8 units undergo pre-shipment inspection (PSI). If there is an issue with QS3383QG8, 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 QS3383QG8 part is unused and in its original packaging.
Return procedure for QS3383QG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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