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Renesas 74CBTLV3251QG
- Part No.:
- 74CBTLV3251QG
- Manufacturer:
- Renesas
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
74CBTLV3251QG.pdf
- Description:
- IC MUX/DEMUX 1 X 8:1 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,303
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Product details
Overview
74CBTLV3251QG from Renesas Electronics is a low-voltage 8:1 bi-directional multiplexer/demultiplexer IC with 5Ω on-state resistance, 2.3V–3.6V supply range, and industrial temperature operation (−40°C to +85°C). It enables high-speed signal routing in data-path switching applications such as memory address selection and bus isolation.
For engineers reviewing the 74CBTLV3251QG datasheet, 74CBTLV3251QG pinout, 74CBTLV3251QG application, or 74CBTLV3251QG equivalent, key selection criteria include its 0.25ns max propagation delay, OE-controlled high-impedance state during power sequencing, over-voltage tolerance, and QSOP-16 package compatibility with space-constrained PCB layouts.
Technical Context
The 74CBTLV3251QG implements an 8-channel analog switch matrix controlled by three binary select lines (S0–S2) and an active-low output-enable (OE) input. Its CMOS-based transmission gate architecture ensures symmetrical bi-directional conduction with minimal distortion across A and B ports.
It features power-off isolation, latch-up immunity exceeding 100mA, and ESD protection rated >2000V (MIL-STD-883) and >200V (machine model). The device operates without level-shifting circuitry when interfacing between 2.5V and 3.3V domains due to over-voltage tolerant inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3V–3.6V - supports dual-supply systems and battery-backed logic without external regulators |
| RON (Max) | 8Ω at VCC = 2.5V - ensures <10mV voltage drop at 64mA channel current for precision analog/data path use |
| tPD (Max) | 0.25ns - enables sub-nanosecond timing-critical switching in high-speed memory and test equipment |
| IOFF (Max) | 50µA at VCC = 0 - guarantees signal isolation during hot-swap or partial-power-down sequences |
| VIH/VIL | 2.0V/0.8V at VCC = 3.3V - compatible with standard LVTTL and LVCMOS logic thresholds |
| Operating Temp | −40°C to +85°C - qualified for industrial control, automotive body electronics, and telecom infrastructure |
Pinout & Package
74CBTLV3251QG is packaged in a 16-pin Quarter-Size Small Outline Package (QSOP), 3.9mm × 4.9mm body, 0.635mm pitch, JEDEC MO-137 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A | Common I/O port | Bi-directional data terminal connected to all eight Bx switches; must be terminated to avoid floating |
| B1–B8 | Channel I/O ports | Eight independent bidirectional signal paths; each connects to A only when selected by S0–S2 |
| S0–S2 | Binary select inputs | 3-bit address determining which Bx port is routed to A; L/H logic levels define channel mapping per function table |
| OE | Active-low output enable | Drives all switches into high-Z when high; tied to VCC via pullup for safe power-up behavior |
| VCC, GND | Power supply terminals | Single 2.3–3.6V rail powers internal logic and switch bias; decoupling capacitor required near VCC pin |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional 5Ω switch | Enables lossless signal routing in both directions without polarity constraints or direction control logic |
| Power-off isolation | Maintains >10⁹Ω channel isolation when VCC = 0, preventing backdrive or leakage in unpowered subsystems |
| Over-voltage tolerant inputs | Accepts up to +4.6V on any I/O pin regardless of VCC, simplifying mixed-voltage board-level interfacing |
| Industrial temp grade | Guaranteed parametric performance across −40°C to +85°C ambient, eliminating derating calculations for harsh environments |
Applications
| Memory Address Multiplexing | PCI Express Lane Switching |
|---|---|
Use Scenario: Reducing pin count on microcontroller or FPGA by sharing address/data lines between multiple SRAM or Flash devices. IC Role / Device Role / Timing Role: 8:1 analog mux selects one of eight memory banks onto a shared 16-bit data bus under S0–S2 control. Use Value: Eliminates need for discrete logic or larger CPLDs; 0.25ns tPD avoids timing violations in 100MHz+ bus cycles. | Use Scenario: Dynamic reconfiguration of PCIe lane assignments in server backplanes or modular compute cards. IC Role / Device Role / Timing Role: Bi-directional signal path selector enabling lane failover or bandwidth reallocation without protocol-aware logic. Use Value: 5Ω RON and <40.5pF CIO(OFF) preserve signal integrity up to 2.5GT/s; OE allows glitch-free hot-reconfiguration. |
| Test Equipment Signal Routing | Industrial I/O Multiplexing |
Use Scenario: Automated test systems requiring programmable connection between DUT pins and measurement instruments. IC Role / Device Role / Timing Role: High-isolation, low-RON switch matrix controlled via microcontroller GPIOs for flexible probe path assignment. Use Value: IOFF <50µA prevents cross-talk during unselected states; over-voltage tolerance protects against accidental 5V probe misconnection. | Use Scenario: PLC modules consolidating multiple sensor inputs (RTD, thermocouple, 4–20mA) onto a single ADC channel. IC Role / Device Role / Timing Role: Low-leakage analog multiplexer scanning eight field inputs while maintaining channel-to-channel isolation >60dB. Use Value: VIH/VIL margins ensure reliable decoding of noisy industrial logic signals; latch-up immunity withstands EFT bursts per IEC 61000-4-4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8:1 analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT3251PWR | Higher RON (7Ω typ at 3.3V), same 16-pin TSSOP footprint but different pinout; no over-voltage tolerance | Limited to 3.3V-only systems; unsuitable for mixed-voltage hot-swap scenarios | Choose if cost-sensitive and operating exclusively at 3.3V with no over-voltage risk |
| 74LVC1G3157GW | Single-pole double-throw (SPDT), not 8:1; smaller 6-pin SC-70 package; 3.6V max VCC | Only supports 1-of-2 selection; requires eight devices to match 74CBTLV3251QG functionality | Choose only for ultra-low-density routing where board area outweighs component count and control complexity |
Compared with SN74CBT3251PWR and 74LVC1G3157GW, the 74CBTLV3251QG uniquely combines 8:1 channel density, over-voltage tolerant I/O, and guaranteed industrial temperature operation in a single QSOP-16 package-enabling compact, robust, and voltage-flexible signal routing without redesigning layout or adding protection circuitry.
Availability
74CBTLV3251QG is available at Aetrix Electronics and suitable for industrial control systems, automated test equipment, and embedded computing platforms requiring stable component supply and long-term lifecycle support.
Supply support for 74CBTLV3251QG 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, infrastructure, and IoT applications.
The 74CBTLV3251QG belongs to Renesas' legacy CBTLV logic family, designed specifically for high-speed, low-voltage signal switching in industrial and communications equipment where power efficiency, noise immunity, and thermal reliability are critical.
FAQ
What is the maximum allowable voltage on the B1–B8 pins of the 74CBTLV3251QG when VCC = 0V?
The 74CBTLV3251QG supports over-voltage tolerant inputs: B1–B8 pins accept up to +4.6V regardless of VCC state. This allows safe connection to powered subsystems while the 74CBTLV3251QG is unpowered, preventing backfeed and enabling hot-swap capability without external protection diodes.
Does the 74CBTLV3251QG require external pull-up resistors on the OE pin, and why?
Yes - OE should be tied to VCC through a pull-up resistor to ensure the 74CBTLV3251QG enters high-impedance state during power-up or brownout. The minimum resistor value depends on the driver's sink capability; typical values range from 4.7kΩ to 10kΩ. This prevents unintended channel activation before system initialization completes.
Can the 74CBTLV3251QG be used to switch analog signals such as audio or sensor outputs?
Yes - the 74CBTLV3251QG is a bi-directional analog switch with flat RON (<8Ω) and low charge injection (<1pC), making it suitable for DC-coupled audio routing, thermocouple multiplexing, and other low-frequency analog signals up to ~10MHz. For higher frequencies or precision instrumentation, verify THD and crosstalk against your specific signal amplitude and bandwidth requirements.
What is the recommended PCB layout practice for minimizing noise coupling on the 74CBTLV3251QG's A and Bx pins?
Place a 0.1µF ceramic decoupling capacitor between VCC and GND within 2mm of the 74CBTLV3251QG's power pins. Route A and Bx traces as matched-length, non-adjacent differential pairs where possible, and avoid crossing noisy digital lines. Ground guard traces around sensitive analog paths reduce crosstalk, especially critical when switching millivolt-level sensor signals.
Is the 74CBTLV3251QG RoHS-compliant and halogen-free?
Yes - the 74CBTLV3251QG is RoHS-compliant and halogen-free per Renesas' ordering information and material declarations. The "G" suffix in the part number (74CBTLV3251QG) explicitly denotes green (lead-free, halogen-free) packaging, and it meets JEDEC J-STD-609 Category 1a requirements for bromine and chlorine content.
74CBTLV3251QG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 74CBTLV
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Multiplexer/Demultiplexer
- Circuit:
- 1 x 8:1
- 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
74CBTLV3251QG FAQ
1.How can I place an order for 74CBTLV3251QG through Aetrix?
Please submit a Request for Quotation (RFQ) for 74CBTLV3251QG 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 74CBTLV3251QG reliable?
The price and inventory of 74CBTLV3251QG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74CBTLV3251QG is usually 5 days.
3.What payment methods are accepted for 74CBTLV3251QG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74CBTLV3251QG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74CBTLV3251QG?
74CBTLV3251QG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74CBTLV3251QG 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 74CBTLV3251QG?
For technical support, including 74CBTLV3251QG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74CBTLV3251QG requirements.
6.How does Aetrix verify that 74CBTLV3251QG is sourced from the original manufacturer or authorized distributors?
All 74CBTLV3251QG 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 74CBTLV3251QG meets industry standards.
7.What is the process for return or replacement of 74CBTLV3251QG?
All 74CBTLV3251QG units undergo pre-shipment inspection (PSI). If there is an issue with 74CBTLV3251QG, 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 74CBTLV3251QG part is unused and in its original packaging.
Return procedure for 74CBTLV3251QG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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