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Renesas QS3383QG
- Part No.:
- QS3383QG
- Manufacturer:
- Renesas
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
QS3383QG.pdf
- Description:
- IC BUS FET EXCHG SW 5X2:2 24QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:790
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Product details
Overview
QS3383QG from Renesas Electronics is a high-speed CMOS 10-bit bus exchange switch with bidirectional 5Ω 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 industrial backplane systems.
For engineers reviewing the QS3383QG datasheet, QS3383QG pinout, QS3383QG application, or QS3383QG equivalent, key selection criteria include ON-resistance (6–8 Ω), tPLH/tPHL ≤0.25 ns, BE/BX control timing, bus exchange functionality, and QSOP-24 package compatibility with legacy IDT QuickSwitch designs.
Technical Context
The QS3383QG implements ten independent bidirectional analog switches controlled by BE (enable) and BX (exchange). When BE = L and BX = L, A/B buses connect directly to C/D buses; when BX = H, A/B and C/D are swapped-enabling byte-level bus reconfiguration without latching or clocking.
Each switch features undervoltage clamp diodes on all I/O and control pins, supports DC input voltages from –0.5 V to +7 V, and exhibits <7 pF off-state capacitance per channel. Its enhanced N-channel FET structure eliminates inherent body diode conduction to VCC, preventing unintended power rail coupling during hot-swap events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ON Resistance | 6–8 Ω at VCC = 5V, enabling low-loss signal pass-through with <0.25 ns RC-limited propagation delay |
| Propagation Delay | ≤0.25 ns (tPLH/tPHL), effectively zero added system delay beyond driver/load interaction |
| Bus Exchange Function | Nibble-swap of A0–A4/B0–B4 with C0–C4/D0–D4 via single BX pin, supporting byte reordering |
| Operating Temperature | –40°C to +85°C, qualified for industrial embedded and backplane applications |
| Supply Voltage Range | VCC = 5V ±5%, with absolute max VTERM = –0.5 V to +7 V on all terminals except VCC |
| Input Leakage | ±1 μA max (IIN, IOZ), minimizing standby current impact in high-density bus systems |
| Off-State Capacitance | 5–7 pF per channel, reducing crosstalk and maintaining signal integrity at >100 MHz |
Pinout & Package
QS3383QG is housed in a 24-pin QSOP (Quarter Size Outline Package) with 0.635 mm pitch, JEDEC MS-013 compliant, and RoHS-compliant "Green" finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BE | Active-low bus enable | When LOW, activates all ten switches; HIGH places all channels in high-impedance state |
| BX | Bus exchange control | When HIGH, swaps A/B ↔ C/D nibbles; when LOW, connects A→C and B→D directly |
| A0–A4, B0–B4 | Input/Output bus pair | Five-bit bidirectional data paths; no internal directionality-signal flow determined by external drivers |
| C0–C4, D0–D4 | Input/Output bus pair | Five-bit bidirectional data paths; electrically identical to A/B, swapped or passed based on BX state |
| VCC | Power supply | 5V ±5% supply; all VCC pins must be decoupled locally to suppress switching noise |
| GND | Ground reference | Common return for all I/O and control signals; requires low-inductance connection to minimize ground bounce |
Key Features
| Feature | Design Value |
|---|---|
| Zero-propagation-delay switching | RC-limited delay <0.25 ns at 50 pF load ensures transparent bus extension without timing budget impact |
| Nibble-swap architecture | Single BX pin reconfigures 10-bit data routing between two 5-bit buses-enabling dynamic resource sharing without FPGA logic |
| Undershoot clamp diodes | Integrated clamps on all I/O and control pins protect against –3 V transient pulses (≤20 ns), critical for hot-dock reliability |
| No intrinsic VCC diode | Enhanced N-FET design prevents reverse current flow into VCC during bus contention or hot-insertion |
| TTL-compatible interface | VIH = 2 V min / VIL = 0.8 V max allows direct connection to 5V microcontrollers and ASICs without level shifters |
Applications
| Hot-Swappable Backplane Interface | Voltage Translation Bridge |
|---|---|
Use Scenario: Inserting/removing mezzanine cards in industrial PLC chassis while main backplane remains powered. IC Role / Device Role / Timing Role: QS3383QG acts as a bidirectional isolation switch between card-side and backplane-side buses, enabling safe insertion with BX-controlled bus alignment. Use Value: Prevents ground bounce and bus contention during hot-swap; clamped inputs withstand –3 V transients from connector arcing. | Use Scenario: Interfacing a 5V legacy microcontroller to a 3.3V FPGA I/O bank without dedicated level translators. IC Role / Device Role / Timing Role: QS3383QG serves as passive voltage-tolerant bus switch-passing signals bidirectionally while limiting VIH/VIL thresholds to 5V logic levels. Use Value: Eliminates need for active translators; RON ≤8 Ω preserves edge rate for 50 MHz parallel bus operation. |
| Dynamic Resource Sharing | Low-Delay Barrel Shifter |
Use Scenario: Two processors sharing access to a single SRAM block via time-multiplexed address/data buses. IC Role / Device Role / Timing Role: QS3383QG functions as a software-configurable bus crosspoint-BE enables/disables access, BX selects processor-to-memory mapping. Use Value: Enables sub-ns arbitration latency; no clock or setup/hold timing constraints simplify firmware control. | Use Scenario: Implementing 4-bit rotate-left/rotate-right in real-time digital signal processing pipelines. IC Role / Device Role / Timing Role: QS3383QG configured as 5-wide 2:1 multiplexer (using BE/BX) creates programmable bit-shift path with minimal added delay. Use Value: Achieves <0.25 ns per stage delay vs. >2 ns for equivalent gate-based shifter-critical for cycle-accurate DSP kernels. |
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 NB3N3020MNR2G | 8-bit, non-exchange configuration; no BX pin; fixed A→B routing only | Lacks nibble-swap; suitable only for static bus extension, not dynamic reconfiguration | Select when bus topology is fixed and BX functionality is unnecessary |
| Renesas QS3257QG | 8-bit, dual 4:1 mux architecture; supports select-driven routing but no built-in exchange mode | Requires external logic to emulate nibble swap; higher control pin count (3 select lines) | Choose when multi-source routing (beyond 2-bus exchange) is required |
Compared with NB3N3020MNR2G and QS3257QG, the QS3383QG uniquely integrates dedicated nibble-swap logic in a 10-bit configuration-reducing PCB routing complexity and eliminating external glue logic for byte-reordering applications.
Availability
QS3383QG is available at Aetrix Electronics and suitable for industrial backplane interfaces, hot-pluggable module interconnects, and voltage-translation bridges requiring stable component supply over extended product lifecycles.
Supply support for QS3383QG 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, and infrastructure markets.
The QS3383QG belongs to Renesas' legacy QuickSwitch® bus switch family-designed specifically for zero-delay, hot-swap-capable bus interfacing in industrial and telecom equipment.
FAQ
What is the maximum operating voltage for QS3383QG control inputs?
The QS3383QG control inputs (BE and BX) tolerate DC voltages from –0.5 V to +7 V per absolute maximum ratings. For guaranteed logic HIGH operation, VIH ≥2 V is required at VCC = 5V; for logic LOW, VIL ≤0.8 V. These thresholds ensure compatibility with standard 5V TTL and CMOS drivers without level shifting.
Does QS3383QG support hot-swap operation, and how is it protected?
Yes, QS3383QG supports hot-swap operation through integrated undershoot clamp diodes on all I/O and control pins-capable of sinking –3 V transients with ≤20 ns pulse width. Its enhanced N-channel FET structure also eliminates the body diode to VCC, preventing reverse current injection during insertion-induced bus contention.
Can QS3383QG be used for voltage translation between 5V and 3.3V systems?
Yes, QS3383QG is commonly used for bidirectional 5V-to-3.3V voltage translation. Its TTL-compatible inputs accept 3.3V logic highs as valid VIH (≥2 V), and its low ON resistance (6–8 Ω) ensures minimal voltage drop. However, VCC must remain at 5V; the device does not regulate or shift supply rails-it passes signals with level tolerance.
What is the function of the BX pin on QS3383QG, and how does it affect signal routing?
The BX (Bus Exchange) pin on QS3383QG controls nibble-level swapping between the A/B and C/D bus pairs. When BX = LOW, A0–A4 and B0–B4 connect directly to C0–C4 and D0–D4 respectively. When BX = HIGH, A/B and C/D are crossed-A0–A4 route to D0–D4 and B0–B4 to C0–C4-enabling byte reordering without external logic.
Is QS3383QG pin-compatible with other QuickSwitch devices like QS3257 or QS3384?
No, QS3383QG is not pin-compatible with QS3257 or QS3384. It uses a unique 24-pin QSOP layout optimized for ten bidirectional channels and dual control (BE/BX). QS3257 is an 8-bit dual 4:1 mux in 16-pin TSSOP; QS3384 is a 12-bit variant in 28-pin SOIC. Pin counts, spacing, and signal assignments differ across the family.
QS3383QG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 24-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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
QS3383QG FAQ
1.How can I place an order for QS3383QG through Aetrix?
Please submit a Request for Quotation (RFQ) for QS3383QG 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 QS3383QG reliable?
The price and inventory of QS3383QG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for QS3383QG is usually 5 days.
3.What payment methods are accepted for QS3383QG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for QS3383QG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for QS3383QG?
QS3383QG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your QS3383QG 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 QS3383QG?
For technical support, including QS3383QG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your QS3383QG requirements.
6.How does Aetrix verify that QS3383QG is sourced from the original manufacturer or authorized distributors?
All QS3383QG 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 QS3383QG meets industry standards.
7.What is the process for return or replacement of QS3383QG?
All QS3383QG units undergo pre-shipment inspection (PSI). If there is an issue with QS3383QG, 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 QS3383QG part is unused and in its original packaging.
Return procedure for QS3383QG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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