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Renesas QS3VH253QG8
- Part No.:
- QS3VH253QG8
- Manufacturer:
- Renesas
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
QS3VH253QG8.pdf
- Description:
- IC BUS SWITCH 2 X 4:1 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,996
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Product details
Overview
QS3VH253QG8 from Renesas Electronics (formerly IDT) is a dual 4:1 multiplexer/demultiplexer bus switch with N-channel FET architecture, 4 Ω typical ON resistance, <0.2 ns propagation delay, 5 V tolerance in both ON/OFF states, and operation from 2.3 V to 3.6 V VCC - used for hot-swappable I/O routing in high-speed communication backplanes.
For engineers reviewing the QS3VH253QG8 datasheet, QS3VH253QG8 pinout, QS3VH253QG8 application, or QS3VH253QG8 equivalent, key selection criteria include rail-to-rail analog switching capability, LVTTL-compatible control inputs, 500 MHz bandwidth, isolation under power-off conditions, and QSOP-16 package compatibility with industrial temperature range (–40°C to +85°C).
Technical Context
The QS3VH253QG8 implements two independent 4:1 bidirectional analog/data switches controlled by shared S0/S1 select lines and separate EA/EB enable inputs. Each channel features N-channel FETs without parasitic diodes to VCC, enabling true 0–5 V rail-to-rail signal pass-through and isolation when powered down.
It operates with 2.3–3.6 V supply while supporting 5 V signals on all I/O pins, exhibits flat RON over voltage and temperature, matches RON across channels within ±0.5 Ω, and delivers <250 ps system-level propagation delay due to low 4 pF I/O capacitance and sub-5 Ω ON resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3 V to 3.6 V - supports both 2.5 V and 3.3 V logic systems without level translation |
| RON (Typ.) | 4 Ω at VCC = 3.3 V - enables low-insertion-loss signal routing for high-fidelity analog or digital buses |
| Propagation Delay | <0.2 ns - contributes negligible timing skew in high-speed multiplexed data paths |
| I/O Voltage Tolerance | –0.5 V to +5.5 V - allows safe interfacing with 5 V sources while powered from 2.5/3.3 V rails |
| Bandwidth | 500 MHz - supports fast edge rates up to ~700 Mbps NRZ data without significant attenuation |
| I/O Capacitance | 4 pF typical - minimizes loading on driving circuits and preserves signal integrity in dense layouts |
| Operating Temp | –40°C to +85°C - qualified for industrial-grade embedded and telecom infrastructure applications |
Pinout & Package
QS3VH253QG8 is packaged in a 16-pin QSOP (Green, RoHS-compliant) with 0.65 mm pitch and standard JEDEC MO-137 footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| I0A–I3A | Data Inputs A | Four bidirectional analog/digital inputs for Channel A multiplexer path |
| I0B–I3B | Data Inputs B | Four bidirectional analog/digital inputs for Channel B multiplexer path |
| YA, YB | Data Outputs | Single-ended outputs selecting one of four inputs per channel; fully bidirectional |
| S0, S1 | Select Inputs | LVTTL-compatible binary address lines controlling 4:1 channel selection (0–3) |
| EA, EB | Enable Inputs | Active-low enables; independent control of Channel A and Channel B switching |
| VCC | Power Supply | 2.3–3.6 V core supply; powers internal logic and gate drive only - no current path to I/O |
| GND | Ground Reference | Common return for control logic and substrate bias; isolated from signal path ground bounce |
Key Features
| Feature | Design Value |
|---|---|
| No parasitic diode to VCC | Enables true power-off isolation: zero DC path between I/O pins when VCC = 0 V |
| Rail-to-rail switching | Supports 0–5 V analog or digital signals regardless of VCC level - eliminates external clamping |
| RON matching | ≤0.5 Ω mismatch between channels - critical for balanced differential or parallel bus applications |
| Undershoot clamp diodes | Integrated protection on all I/O and control pins - prevents latch-up during hot-swap transients |
| Low dynamic power | ICCD ≤ 2 mA at 10 MHz enable toggle - reduces noise coupling in mixed-signal PCBs |
Applications
| Hot-Swappable Backplane Interface | ATM Cell Switching |
|---|---|
Use Scenario: Insertion/removal of line cards in live telecom chassis without disrupting upstream/downstream traffic. IC Role / Device Role / Timing Role: Bidirectional analog bus switch isolating card-side logic from backplane while maintaining signal continuity during insertion. Use Value: Enables zero-downtime maintenance via power-off isolation and 5 V tolerant I/O - no sequencing required. |
Use Scenario: Routing ATM 25/155 Mbps cells between multiple PHY interfaces and a shared SAR processor. IC Role / Device Role / Timing Role: Low-skew, low-capacitance 4:1 mux/demux handling NRZ-encoded cell payloads with minimal jitter addition. Use Value: Sub-0.2 ns propagation delay and 500 MHz bandwidth preserve cell timing integrity across switching paths. |
| Low-Distortion Analog Multiplexing | Logic-Level Translation-Free I/O Expansion |
Use Scenario: Selecting among four sensor inputs (e.g., thermocouples, RTDs) feeding a single ADC in industrial PLC modules. IC Role / Device Role / Timing Role: Rail-to-rail analog switch passing DC-coupled signals with flat RON and no VCC-dependent offset. Use Value: 4 Ω RON and 4 pF capacitance minimize gain error and settling time degradation vs. mechanical relays. |
Use Scenario: Expanding GPIO count on a 3.3 V microcontroller by sharing four peripheral devices across two bidirectional data buses. IC Role / Device Role / Timing Role: Dual 4:1 demux/mux enabling time-multiplexed access to peripherals without voltage translators. Use Value: 5 V tolerant I/O allows direct connection to legacy 5 V peripherals while operating from 3.3 V VCC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual 4:1 analog bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT3253PWR | Higher RON (7 Ω typ.), no undershoot clamps, 3.3 V only VCC, no 5 V tolerance on I/O | Not suitable for hot-swap or mixed-voltage systems requiring 5 V signal pass-through | Prefer QS3VH253QG8 where power-off isolation or 5 V I/O tolerance is required |
| PI3CH480Q | Single 8:1 mux (not dual), higher ICCQ (8 mA), no independent EA/EB enables, 1.8–5.5 V VCC | Lacks independent channel control and dual-path architecture needed for parallel bus isolation | Prefer QS3VH253QG8 for applications needing two isolated 4:1 paths with separate enables |
Compared with SN74CBT3253PWR and PI3CH480Q, the QS3VH253QG8 uniquely combines independent dual-channel enables, 5 V I/O tolerance with 2.5/3.3 V supply, power-off isolation, and sub-0.2 ns delay - making it optimal for industrial hot-swap and high-fidelity analog multiplexing where reliability and signal fidelity are critical.
Availability
QS3VH253QG8 is available at Aetrix Electronics and suitable for hot-swappable backplane interfaces, ATM switching fabric, low-distortion sensor multiplexing, and logic-level translation-free I/O expansion requiring stable component supply across extended temperature ranges.
Supply support for QS3VH253QG8 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 QS3VH253QG8 belongs to Renesas' legacy QuickSwitch® analog bus switch family, originally developed by IDT to address high-bandwidth, low-latency signal routing needs in telecom, computing, and industrial hot-swap systems.
FAQ
What is the maximum signal voltage the QS3VH253QG8 can pass while powered from 3.3 V?
The QS3VH253QG8 supports DC input voltages from –0.5 V to +5.5 V on all I/O pins regardless of VCC level. When powered from 3.3 V, it safely passes 0–5 V analog or digital signals in both ON and OFF states - enabling interoperability with legacy 5 V peripherals without level shifters.
Does the QS3VH253QG8 require external clamping diodes for hot-swap transient protection?
No. The QS3VH253QG8 integrates undershoot clamp diodes on all switch and control inputs, providing built-in protection against negative transients down to –3 V (pulse width ≤20 ns). This eliminates the need for external TVS or Schottky clamps in hot-plug interface designs.
Can the QS3VH253QG8 be used to isolate signals when VCC is disconnected?
Yes. Its N-channel FET architecture has no parasitic diode to VCC, ensuring complete isolation between I/O pins when VCC = 0 V. Input/output leakage remains ≤±1 μA, and no DC path exists to VCC or GND - satisfying true power-off isolation requirements for live-system card replacement.
What is the typical ON resistance matching between channels in the QS3VH253QG8?
The QS3VH253QG8 exhibits excellent RON matching: typical mismatch is ≤0.5 Ω across all eight switch channels (I0A–I3A and I0B–I3B) at VCC = 3.3 V and VIN = 2.4 V. This ensures balanced signal paths in differential or parallel-bus applications where gain or timing skew must be minimized.
Is the QS3VH253QG8 pin-compatible with other QuickSwitch® devices in QSOP-16 package?
The QS3VH253QG8 uses the standard QSOP-16 pinout defined for dual 4:1 mux/demux QuickSwitch® devices (e.g., QS3VH244, QS3VH245). Pin functions including I0A–I3A, I0B–I3B, YA/YB, S0/S1, EA/EB, VCC, and GND are consistent across this family - enabling layout reuse where functional requirements align.
QS3VH253QG8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 3VH
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Bus Switch
- Circuit:
- 2 x 4:1
- Independent Circuits:
- 1
- Current - Output High, Low:
- -
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 2.3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QSOP
QS3VH253QG8 FAQ
1.How can I place an order for QS3VH253QG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for QS3VH253QG8 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 QS3VH253QG8 reliable?
The price and inventory of QS3VH253QG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for QS3VH253QG8 is usually 5 days.
3.What payment methods are accepted for QS3VH253QG8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for QS3VH253QG8 transactions.
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4.How is shipping managed for QS3VH253QG8?
QS3VH253QG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your QS3VH253QG8 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 QS3VH253QG8?
For technical support, including QS3VH253QG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your QS3VH253QG8 requirements.
6.How does Aetrix verify that QS3VH253QG8 is sourced from the original manufacturer or authorized distributors?
All QS3VH253QG8 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 QS3VH253QG8 meets industry standards.
7.What is the process for return or replacement of QS3VH253QG8?
All QS3VH253QG8 units undergo pre-shipment inspection (PSI). If there is an issue with QS3VH253QG8, 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 QS3VH253QG8 part is unused and in its original packaging.
Return procedure for QS3VH253QG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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