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Renesas QS3253QG8
- Part No.:
- QS3253QG8
- Manufacturer:
- Renesas
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
QS3253QG8.pdf
- Description:
- IC MUX/DEMUX 2 X 4:1 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
QS3253QG8 from Renesas Electronics is a high-speed CMOS dual 4:1 multiplexer/demultiplexer with TTL-compatible control inputs, 5 Ω typical ON resistance, zero propagation delay, and operation from –40°C to +85°C. It serves as a logic-level bus switch for bidirectional signal routing in video/audio switching, hot-swap interfaces, and voltage translation between 5V and 3.3V domains.
For engineers reviewing the QS3253QG8 datasheet, QS3253QG8 pinout, QS3253QG8 application, or QS3253QG8 equivalent, key selection criteria include guaranteed 5 Ω ON resistance at 30 mA, undershoot clamp diodes on all switch/control pins, 0.25 ns typical propagation delay contribution, and pin compatibility with 74F253/74FCT253 families.
Technical Context
The QS3253QG8 implements two independent 4:1 analog/digital bus switches using enhanced N-channel FETs with no inherent body diode to VCC, enabling true bidirectional signal flow without DC path constraints. Each channel features separate enable (EA/EB) and dual select (S1/S0) inputs, supporting simultaneous or independent mux/demux operation.
Its zero-ground-bounce architecture eliminates switching noise during state transitions, while undershoot clamp diodes on all I/O and control terminals protect against negative transients down to –3 V (AC) or –0.5 V (DC). The device operates exclusively at 5.0 V ±5% and draws only 3 μA quiescent supply current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ON Resistance | 5 Ω typical at VCC = 5 V, VIN = 0 V, ION = 30 mA - enables low-loss signal pass-through with minimal RC delay |
| Propagation Delay | <0.25 ns max - adds negligible timing overhead beyond load-dependent RC delay |
| Supply Voltage | 5.0 V ±5% - fixed single-supply operation; not 3.3 V or dual-rail capable |
| Operating Temp | –40°C to +85°C - qualified for industrial environments without derating |
| Input Logic Levels | VIL ≤ 0.8 V, VIH ≥ 2.0 V - fully compatible with TTL and 5 V CMOS driving sources |
| Clamp Diodes | Present on all switch and control inputs - protects against –0.5 V DC or –3 V AC undershoot |
| Quiescent Current | 3 μA max at VCC = 5.5 V - supports low-power standby in always-on systems |
Pinout & Package
QS3253QG8 is packaged in a 16-pin QSOP (Quarter Size Outline Package), 0.150" body width, green RoHS-compliant variant (QG suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EA, EB | Active-low enable inputs | Assert low to activate respective 4:1 channel; high-Z output when high |
| S0, S1 | Binary select inputs | Control which of four inputs (I0x–I3x) connects to output (Yx) |
| I0A–I3A, I0B–I3B | Bidirectional data inputs | Pass signals in either direction when channel enabled; no polarity constraint |
| YA, YB | Switched outputs | 3-state outputs; high-impedance when EA/EB high or no valid select code |
| VCC, GND | Power supply terminals | Single 5 V supply only; no internal regulation or voltage translation circuitry |
Key Features
| Feature | Design Value |
|---|---|
| No intrinsic body diode | Enables true bidirectional analog/digital signal routing without forward-bias constraints to VCC |
| Zero ground bounce | Eliminates simultaneous switching noise that corrupts shared ground references in dense PCB layouts |
| TTL-compatible inputs | Accepts standard 5 V logic thresholds without level-shifting circuitry or external pull-ups |
| Undershoot clamping | Protects inputs from –0.5 V DC or –3 V transient undershoot, critical in hot-swap and cable-connected systems |
| Pin compatibility | Direct drop-in replacement for 74F253, 74FCT253, and 74ALS/AS/LS253 in existing designs |
Applications
| Video Signal Routing | Hot-Swappable Peripheral Interface |
|---|---|
Use Scenario: Switching composite or component video signals between multiple sources and displays in broadcast or AV equipment. IC Role / Device Role / Timing Role: Bidirectional analog mux/demux with sub-0.25 ns added delay and 5 Ω RON to preserve signal integrity across 75 Ω lines. Use Value: Maintains flat frequency response to >100 MHz and avoids ghosting or ringing caused by impedance mismatch or switching artifacts. | Use Scenario: Enabling safe insertion/removal of USB, RS-232, or parallel port peripherals without system reset or power cycle. IC Role / Device Role / Timing Role: Isolates host-side logic from peripheral-side transients using active-low enables and undershoot clamps. Use Value: Prevents bus contention and latch-up during plug/unplug events via controlled Z-state activation and robust input protection. |
| Voltage Translation Bridge | Bus Funneling in Industrial Controllers |
Use Scenario: Interfacing legacy 5 V microcontrollers with newer 3.3 V sensors or ADCs in mixed-voltage embedded systems. IC Role / Device Role / Timing Role: Passive level translator leveraging bidirectional FET conduction; no internal logic or direction control required. Use Value: Achieves reliable 5 V ↔ 3.3 V translation without timing skew, direction pins, or external bias components. | Use Scenario: Consolidating multiple sensor or actuator data streams onto a single microcontroller bus in PLC or motion control modules. IC Role / Device Role / Timing Role: Dual independent 4:1 mux channels allow time-multiplexed access to up to eight analog/digital inputs. Use Value: Reduces MCU pin count and PCB trace count while maintaining deterministic access latency per channel. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual 4:1 bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74FCT253QSC | Higher RON (12 Ω typ), no undershoot clamps, 3.5 ns propagation delay | Lacks transient protection and speed; suitable only for static logic-level muxing | Select only if legacy 74FCT footprint must be retained and transient immunity is not required |
| SN74CBT3253PWR | Same 5 Ω RON, but rated for 3.3 V/5 V mixed supply; includes ESD protection (2 kV HBM) | Better suited for portable or mixed-voltage systems requiring higher ESD robustness | Prefer when operating below 5 V or when >2 kV HBM ESD rating is mandatory |
Compared with QS3253QG8, the 74FCT253QSC trades speed and protection for legacy compatibility, while the SN74CBT3253PWR extends voltage flexibility and ESD tolerance at equivalent RON - making QS3253QG8 optimal for industrial 5 V systems prioritizing zero-delay and undershoot resilience.
Availability
QS3253QG8 is available at Aetrix Electronics and suitable for video switching, hot-swap interface design, and voltage translation applications requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for QS3253QG8 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 QS3253QG8 belongs to Renesas' QUICKSWITCH® bus switch product line, engineered specifically for zero-delay, low-RON, bidirectional signal routing in high-speed digital and mixed-signal systems.
FAQ
What is the maximum signal voltage the QS3253QG8 can pass without damage?
The QS3253QG8 supports DC signal voltages from –0.5 V to +7 V on all switch and control terminals (except VCC). This allows safe passage of 5 V logic, 3.3 V signals, and transient undershoot down to –0.5 V. Exceeding +7 V or –0.5 V risks permanent damage per absolute maximum ratings.
Does the QS3253QG8 support 3.3 V logic control inputs?
No. The QS3253QG8 requires 5 V supply and TTL-compatible control inputs (VIL ≤ 0.8 V, VIH ≥ 2.0 V). While 3.3 V logic may often meet VIH, it is not guaranteed across temperature and voltage tolerances. For native 3.3 V control, consider SN74CBT3253PWR instead.
Can the QS3253QG8 be used for analog audio signal switching?
Yes. Its 5 Ω RON, low capacitance (5–7 pF off-state), and absence of body diodes make QS3253QG8 suitable for line-level analog audio switching up to ~20 kHz. For higher fidelity or wider bandwidth, verify THD and crosstalk in actual layout due to PCB parasitics.
Is the QS3253QG8 pin-compatible with the 74LS253 in a through-hole design?
No. QS3253QG8 uses a 16-pin QSOP package. The 74LS253 is typically offered in 16-pin PDIP. Though functionally and logically identical, the physical packages differ - direct replacement requires PCB redesign unless an SOIC-to-DIP adapter is used.
What is the thermal performance of the QS3253QG8 at full load?
At TA = +85°C, the QS3253QG8 has a maximum power dissipation of 0.5 W. With typical RON = 5 Ω and worst-case 120 mA per channel, power per switch is <1 mW - well within limits. No heatsinking is required under normal operation, even with both channels active.
QS3253QG8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Multiplexer/Demultiplexer
- Circuit:
- 2 x 4:1
- 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:
- 16-QSOP
QS3253QG8 FAQ
1.How can I place an order for QS3253QG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for QS3253QG8 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 QS3253QG8 reliable?
The price and inventory of QS3253QG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for QS3253QG8 is usually 5 days.
3.What payment methods are accepted for QS3253QG8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for QS3253QG8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for QS3253QG8?
QS3253QG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your QS3253QG8 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 QS3253QG8?
For technical support, including QS3253QG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your QS3253QG8 requirements.
6.How does Aetrix verify that QS3253QG8 is sourced from the original manufacturer or authorized distributors?
All QS3253QG8 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 QS3253QG8 meets industry standards.
7.What is the process for return or replacement of QS3253QG8?
All QS3253QG8 units undergo pre-shipment inspection (PSI). If there is an issue with QS3253QG8, 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 QS3253QG8 part is unused and in its original packaging.
Return procedure for QS3253QG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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