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Renesas QS4A201QG
- Part No.:
- QS4A201QG
- Manufacturer:
- Renesas
- Category:
- Analog Switches - Special Purpose
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
QS4A201QG.pdf
- Description:
- IC CROSSPOINT SWITCH DUAL 24QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,717
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Product details
Overview
QS4A201QG from Renesas Electronics (formerly IDT) is a high-performance CMOS 2×2 analog crosspoint switch with 1.3 GHz bandwidth, 5 Ω typical ON resistance, and TTL-compatible control inputs. It operates from a single 5 V supply across –40°C to +85°C and supports break-before-make switching for video signal routing, HDTV systems, and high-speed telecomm applications.
For engineers reviewing the QS4A201QG datasheet, QS4A201QG pinout, QS4A201QG application, or QS4A201QG equivalent, key selection criteria include its 6.5 ns enable turn-on time, –40 dB off-isolation at 5.5 MHz, ultra-low 3 μA quiescent current, and QSOP-24 package compatibility with high-density PCB layouts.
Technical Context
The QS4A201QG implements two independent bidirectional analog switch paths (A↔C and B↔D) controlled by E (Enable) and S (Exchange) logic inputs. Its CMOS architecture delivers low charge injection (1.5 pC) and minimal group delay (≤250 ps), enabling clean signal integrity in high-frequency video and data acquisition paths.
It features break-before-make switching to prevent bus contention, supports analog signal ranges from –0.5 V to VCC–1 V, and maintains stable rDS(ON) across input voltages up to 2.4 V under 15 mA load - critical for maintaining flat insertion loss in 75 Ω video systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 1.3 GHz (-3 dB point): enables full HDTV and 1080p60 video signal routing without attenuation |
| rDS(ON) | 5 Ω typical at 0 V input: ensures ≤0.1 dB insertion loss in 75 Ω systems |
| Switching Time | 6.5 ns enable turn-on: supports >150 MHz digital video pixel clock edge alignment |
| Off-isolation | –40 dB at 5.5 MHz: suppresses crosstalk between active and inactive channels in multi-source routing |
| Crosstalk | –40 dB at 5.5 MHz: preserves signal fidelity when multiple analog paths share common PCB traces |
| Supply Current | 3 μA max: allows integration into battery-backed instrumentation and low-power remote sensors |
| Operating Temp | –40°C to +85°C: qualified for industrial video encoders, ATE fixtures, and telecom line cards |
Pinout & Package
QS4A201QG is housed in a 24-pin Quarter Size Outline Package (QSOP), offering reduced pin inductance and shorter trace lengths versus SOIC - improving high-frequency signal integrity and system noise margin.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A4, B0–B4 | Analog I/O ports (A/B side) | Primary bidirectional analog signal terminals; A0–A3 and B0–B3 are functional; A4/B4 are no-connect per datasheet |
| C0–C4, D0–D4 | Analog I/O ports (C/D side) | Secondary bidirectional analog signal terminals; C0–C3 and D0–D3 are functional; C4/D4 are no-connect |
| E | Digital Enable input | Active-low control: disables all switches when high; enables path configuration when low |
| S | Digital Exchange input | Controls signal routing: S = L connects A↔C and B↔D; S = H exchanges to A↔D and B↔C |
| VCC | Positive supply | Single 5 V ±5% supply; powers internal logic and analog switches |
| GND | Ground reference | Common return for analog and digital domains; requires low-impedance PCB plane |
Key Features
| Feature | Design Value |
|---|---|
| Break-before-make switching | Prevents momentary short-circuits during path reconfiguration - essential for hot-swap video routing |
| Ultra-low charge injection (1.5 pC) | Minimizes voltage glitches on sensitive analog nodes during switching transitions |
| TTL-compatible control inputs | Direct interface with FPGA GPIOs and microcontroller outputs without level-shifting |
| Low ON-capacitance (10 pF) | Reduces high-frequency loading on source drivers and preserves rise/fall times |
| Industrial temperature range | Validated operation from –40°C to +85°C without derating - suitable for uncooled enclosures |
Applications
| HDTV Video Routing | Automated Test Equipment (ATE) |
|---|---|
|
Use Scenario: Switching between multiple HDMI or component video sources to a single display or capture device in broadcast production gear. IC Role / Device Role / Timing Role: Bidirectional analog crosspoint switch managing 75 Ω video paths with sub-ns timing alignment. Use Value: 1.3 GHz bandwidth preserves 1080p60 chroma/luma fidelity; –40 dB off-isolation prevents ghosting between active/inactive inputs. |
Use Scenario: Multiplexing precision analog stimulus and response signals among DUT pins in semiconductor test handlers. IC Role / Device Role / Timing Role: Low-leakage (1 nA ON/OFF), low-rDS(ON) analog switch enabling accurate DC/AC parametric measurements. Use Value: 5 Ω ON resistance minimizes measurement error; 3 μA quiescent current reduces thermal drift in long-duration tests. |
| Telecom Signal Routing | Phase Reversal Circuits |
|
Use Scenario: Dynamic reconfiguration of analog voice/data paths in carrier-grade DSLAMs and optical line terminals. IC Role / Device Role / Timing Role: High-speed analog switch supporting TDM and analog POTS line switching with fast enable control. Use Value: 6.5 ns tON(E) enables rapid channel provisioning; QSOP-24 footprint fits dense backplane routing layouts. |
Use Scenario: Inverting signal polarity in balanced audio interfaces or differential clock distribution networks. IC Role / Device Role / Timing Role: Exchange-mode switch toggling A↔D/B↔C paths to flip signal phase without external op-amps. Use Value: Break-before-make logic prevents transient shorts; 1.5 pC charge injection avoids audible pop/click artifacts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog crosspoint switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4581ESE+ | 8-channel single-ended mux; 200 MHz bandwidth; 60 Ω rDS(ON); SOIC-16 package | Lower bandwidth and higher ON resistance limit use to SDTV or baseband audio, not HDTV | Choose for cost-sensitive, lower-frequency multiplexer applications where board space permits larger SOIC |
| ADG774ARUZ | 4-channel SPDT; 200 MHz bandwidth; 2.6 Ω rDS(ON); TSSOP-16 package; 3 V operation only | Requires level-shifting for 5 V systems; lacks exchange mode and dual-path independence | Prefer for low-voltage portable instrumentation where ultra-low ON resistance outweighs missing crosspoint topology |
Compared with MAX4581ESE+ and ADG774ARUZ, the QS4A201QG uniquely provides true 2×2 bidirectional crosspoint routing with 1.3 GHz bandwidth and exchange functionality - making it irreplaceable in HDTV routing, phase-reversal, and high-speed ATE where path flexibility and signal fidelity are co-dependent.
Availability
QS4A201QG is available at Aetrix Electronics and suitable for HDTV video routing, automated test equipment (ATE), telecom signal routing, and phase reversal circuits requiring stable component supply and long-term industrial availability.
Supply support for QS4A201QG 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 infrastructure markets.
The QS4A201QG belongs to Renesas' legacy IDT analog switch portfolio, engineered specifically for high-fidelity, high-bandwidth analog signal routing in video, telecom, and test instrumentation systems.
FAQ
What is the maximum analog signal voltage range supported by the QS4A201QG?
The QS4A201QG supports an analog input voltage range of –0.5 V to VCC–1 V, which translates to –0.5 V to +4.0 V when operated at nominal 5 V supply. This range accommodates standard 75 Ω video signals and bipolar audio waveforms while preventing latch-up or damage to the CMOS switch elements. Exceeding these limits risks permanent device degradation per absolute maximum ratings.
Does the QS4A201QG support hot-swap or live signal switching without corruption?
Yes, the QS4A201QG supports live analog signal switching due to its break-before-make control architecture and ultra-low charge injection (1.5 pC). When the E and S inputs change state, the device guarantees no overlap between old and new signal paths, eliminating transient shorts. This behavior, combined with sub-ns transition times, prevents visible artifacts in video or audible pops in audio systems using the QS4A201QG.
Can the QS4A201QG be used with 3.3 V logic control signals?
No - the QS4A201QG requires TTL-compatible control inputs referenced to its 5 V VCC, with VIH ≥ 2.0 V and VIL ≤ 0.8 V. While 3.3 V logic outputs may meet the VIH threshold, they risk marginal noise immunity and undefined behavior near VIL limits. For reliable operation, drive E and S directly from 5 V logic sources or use a dedicated level shifter; the QS4A201QG itself does not support mixed-supply logic interfacing.
What is the thermal performance of the QS4A201QG in continuous operation?
The QS4A201QG dissipates ≤0.7 W maximum under worst-case conditions (120 mA output current, 5 V supply). Its QSOP-24 package has a junction-to-ambient thermal resistance (θJA) of approximately 120°C/W. At 25°C ambient and full load, junction temperature remains below 110°C - well within the –40°C to +125°C rated junction range. No heatsink is required for typical video routing loads.
How does the QS4A201QG handle unused pins such as A4, B4, C4, and D4?
Per the official datasheet, pins A4, B4, C4, and D4 are no-connect (NC) terminals on the QS4A201QG. They must be left unconnected - neither tied to VCC nor grounded - to avoid parasitic coupling or unintended current paths. The functional analog ports are strictly A0–A3, B0–B3, C0–C3, and D0–D3; routing or soldering to NC pins violates the validated design and may impact high-frequency performance.
QS4A201QG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 24-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- Audio, Telecommunications, Video
- Multiplexer/Demultiplexer Circuit:
- 2:2
- Switch Circuit:
- -
- Number of Channels:
- 1
- On-State Resistance (Max):
- 17Ohm
- Voltage - Supply, Single (V+):
- 5V
- Voltage - Supply, Dual (V±):
- -
- -3db Bandwidth:
- 1.3GHz
- Features:
- Break-Before-Make
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-QSOP
QS4A201QG FAQ
1.How can I place an order for QS4A201QG through Aetrix?
Please submit a Request for Quotation (RFQ) for QS4A201QG 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 QS4A201QG reliable?
The price and inventory of QS4A201QG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for QS4A201QG is usually 5 days.
3.What payment methods are accepted for QS4A201QG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for QS4A201QG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for QS4A201QG?
QS4A201QG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your QS4A201QG 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 QS4A201QG?
For technical support, including QS4A201QG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your QS4A201QG requirements.
6.How does Aetrix verify that QS4A201QG is sourced from the original manufacturer or authorized distributors?
All QS4A201QG 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 QS4A201QG meets industry standards.
7.What is the process for return or replacement of QS4A201QG?
All QS4A201QG units undergo pre-shipment inspection (PSI). If there is an issue with QS4A201QG, 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 QS4A201QG part is unused and in its original packaging.
Return procedure for QS4A201QG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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