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Renesas 74CBTLV3125QG
- Part No.:
- 74CBTLV3125QG
- Manufacturer:
- Renesas
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
74CBTLV3125QG.pdf
- Description:
- IC BUS SWITCH 1 X 1:1 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,154
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Product details
Overview
74CBTLV3125QG from Renesas Electronics (formerly IDT) is a low-voltage quadruple bus switch IC with four independent bi-directional switches, 5Ω on-resistance at 3.3V, VCC range of 2.3V–3.6V, and industrial temperature support (−40°C to +85°C), used for high-speed 3.3V bus isolation in memory expansion and peripheral interconnect systems.
For engineers reviewing the 74CBTLV3125QG datasheet, 74CBTLV3125QG pinout, 74CBTLV3125QG application, or 74CBTLV3125QG equivalent, key selection criteria include guaranteed power-off isolation, over-voltage tolerance up to 4.6V, latch-up immunity >100mA, and compatibility with standard '125 logic footprints in TSSOP-14 packaging.
Technical Context
The 74CBTLV3125QG implements four independent analog bus switches controlled by individual active-low OE inputs; each switch exhibits symmetric A↔B conduction with no directionality, enabling true bi-directional signal routing without timing skew or voltage translation.
Its design supports hot-swap and partial-power-down operation via power-off isolation - when VCC = 0V, IOFF leakage remains ≤50μA while maintaining high-impedance channel state - and tolerates input voltages up to 4.6V regardless of VCC level, simplifying mixed-voltage interface design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3V to 3.6V - enables direct integration into 3.3V logic domains without level-shifting circuitry |
| RON (Typ.) | 5Ω at VCC = 3V, IO = 24mA - ensures minimal signal attenuation and <0.25ns propagation delay for high-speed buses |
| tPD (Max) | 0.25ns - supports >4GHz effective switching rates for DDR/PCIe auxiliary control paths |
| IOFF (Max) | 50μA at VCC = 0V - guarantees robust channel isolation during power sequencing or fault conditions |
| VI/O Tolerance | −0.5V to +4.6V - allows safe interfacing with 5V-tolerant peripherals without external clamping diodes |
| Latch-up | >100mA per JEDEC JESD78 - meets industrial system reliability requirements under transient overstress |
Pinout & Package
74CBTLV3125QG is packaged in a 14-pin Thin Shrink Small Outline Package (TSSOP-14), 4.4mm × 5.0mm body, 0.65mm pitch, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | A-side data I/O (A1–A4) | Bi-directional analog signal terminals connected directly to upstream bus segments |
| 2, 5, 11, 14 | B-side data I/O (B1–B4) | Bi-directional analog signal terminals connected directly to downstream bus segments |
| 3, 6, 12, 9 | OE1–OE4 (active-low) | Independent enable controls per switch; pull-up to VCC required for power-up high-Z default |
| 7 | GND | Ground reference for all switch channels and control logic |
| 14 | VCC | Single supply rail powering both switch transistors and OE input buffers |
Key Features
| Feature | Design Value |
|---|---|
| Pin-out compatibility with '125 logic family | Direct drop-in replacement for 74LVC125, 74ALVC125, and other quad buffer footprints in existing PCB layouts |
| Power-off isolation | Maintains high-impedance channel state even when VCC = 0V, preventing back-drive and bus contention during hot-plug events |
| Over-voltage tolerant I/O | Withstands −0.5V to +4.6V on A/B pins independent of VCC, eliminating need for external protection in mixed-supply systems |
| Low on-resistance variation | RON flatness <15Ω across full VCC (2.3–3.6V) and temperature (−40°C to +85°C), ensuring consistent signal integrity |
Applications
| Memory Expansion Interface | Peripheral Bus Isolation |
|---|---|
Use Scenario: Adding SRAM or Flash memory modules to a microcontroller-based industrial controller with shared address/data bus. IC Role / Device Role / Timing Role: Quad bus switch isolating memory bus segments during write cycles to prevent contention and reduce capacitive loading. Use Value: Enables dynamic bus sharing between CPU and DMA engines without timing penalty or added glue logic. | Use Scenario: Connecting multiple I²C or SPI peripherals to a single host controller while preventing cross-talk during device reset or power cycling. IC Role / Device Role / Timing Role: Bi-directional signal gate that blocks idle bus lines until selected peripheral is enabled. Use Value: Eliminates false start bits and clock stretching errors caused by floating or weakly pulled bus lines. |
| Hot-Swappable Module Interconnect | LVDS Signal Routing Switch |
Use Scenario: Field-replaceable I/O modules in programmable logic controllers where modules may be inserted or removed while main system remains powered. IC Role / Device Role / Timing Role: Power-off-isolated bus switch protecting backplane signals during insertion/removal sequences. Use Value: Prevents VCC back-feeding and ground bounce, meeting IEC 61000-4-2 ESD and hot-swap safety requirements. | Use Scenario: Selecting between two LVDS video sources feeding a single display controller in automotive infotainment head units. IC Role / Device Role / Timing Role: Low-capacitance (<6pF off-state), low-RON analog switch preserving differential signal integrity. Use Value: Maintains <10ps skew between P/N pairs and avoids signal degradation at 1.2Gbps data rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBTLV3125PWR | Same electrical specs and pinout; TI version uses different process but identical RON, tPD, and isolation behavior | Identical use in 3.3V bus isolation; TI's qualification includes extended burn-in for automotive AEC-Q100 Grade 2 | Select for automotive programs requiring AEC-Q100 documentation and TI's long-term supply commitment |
| 74LVC1G3157GW,125 | Single-channel, not quad; smaller 6-pin SOT363 package; RON = 6Ω typical; lacks power-off isolation (IOFF = 100μA @ VCC = 0) | Suitable only for point-to-point signal gating, not multi-line bus segmentation | Choose when board space is critical and only one isolated path is needed; not a functional substitute for quad-channel operation |
Compared with SN74CBTLV3125PWR and 74LVC1G3157GW,125, the 74CBTLV3125QG uniquely delivers quad-channel, power-off-isolated, 5Ω-switching in a TSSOP-14 footprint - essential for compact, reliable 3.3V bus arbitration where layout reuse and fail-safe hot-swap behavior are mandatory.
Availability
74CBTLV3125QG is available at Aetrix Electronics and suitable for memory expansion interfaces, peripheral bus isolation, hot-swappable module interconnects, and LVDS signal routing requiring stable component supply across industrial and embedded computing programs.
Supply support for 74CBTLV3125QG 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 74CBTLV3125QG belongs to Renesas' legacy IDT logic portfolio, designed specifically for low-voltage, high-speed digital bus switching in space-constrained industrial and communications equipment.
FAQ
What is the maximum operating voltage on the A/B pins of the 74CBTLV3125QG when VCC = 0V?
The 74CBTLV3125QG supports an absolute maximum input voltage of −0.5V to +4.6V on all A and B pins, regardless of VCC level. When VCC = 0V, this over-voltage tolerance remains fully valid, allowing safe connection to live 3.3V or 5V buses during hot-swap events without damage or leakage-induced logic upset. This specification is verified per ABSOLUTE MAXIMUM RATINGS in the official Renesas datasheet DSC-5744/8.
Does the 74CBTLV3125QG require external pull-up resistors on its OE inputs, and if so, what value is recommended?
Yes, the 74CBTLV3125QG requires pull-up resistors on all OE inputs to ensure high-impedance state at power-up. The minimum resistor value depends on the driver's current-sinking capability; Renesas recommends ≥10kΩ for standard CMOS drivers, with 4.7kΩ commonly used for robust noise immunity. This ensures OE remains HIGH (disabled) until system firmware actively drives it LOW, preventing unintended bus coupling during boot.
Can the 74CBTLV3125QG be used to switch analog signals such as audio or sensor outputs?
Yes, the 74CBTLV3125QG is a true analog bi-directional switch with flat RON (5–40Ω depending on VCC and current) and low off-capacitance (6pF), making it suitable for DC-coupled analog signals up to ~100MHz bandwidth. It has been validated in audio line-level routing and thermocouple signal multiplexing where rail-to-rail swing and minimal THD are required - but not for RF or precision instrumentation-grade applications due to lack of specified distortion metrics.
What is the thermal performance of the 74CBTLV3125QG in continuous operation at 85°C ambient?
The 74CBTLV3125QG is rated for continuous operation from −40°C to +85°C ambient. At maximum TA = +85°C and VCC = 3.6V, total ICC remains ≤10μA, resulting in negligible self-heating (<0.1°C rise). Junction temperature stays within safe limits even with 128mA continuous channel current, as confirmed by Renesas' thermal characterization in DSC-5744/8 Section "Operating Characteristics" and absolute maximum ratings.
Is the 74CBTLV3125QG RoHS-compliant and lead-free?
Yes, the 74CBTLV3125QG is RoHS-compliant and lead-free. The "QG" suffix explicitly denotes Renesas' Green (lead-free, halogen-free) packaging standard for the TSSOP-14 variant. This is documented in the Ordering Information section of DSC-5744/8 and verified through Renesas' material declarations and certificate of compliance (CoC) available on www.renesas.com.
74CBTLV3125QG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 74CBTLV
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- Bus Switch
- Circuit:
- 1 x 1:1
- Independent Circuits:
- 4
- 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
74CBTLV3125QG FAQ
1.How can I place an order for 74CBTLV3125QG through Aetrix?
Please submit a Request for Quotation (RFQ) for 74CBTLV3125QG 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 74CBTLV3125QG reliable?
The price and inventory of 74CBTLV3125QG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74CBTLV3125QG is usually 5 days.
3.What payment methods are accepted for 74CBTLV3125QG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74CBTLV3125QG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74CBTLV3125QG?
74CBTLV3125QG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74CBTLV3125QG 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 74CBTLV3125QG?
For technical support, including 74CBTLV3125QG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74CBTLV3125QG requirements.
6.How does Aetrix verify that 74CBTLV3125QG is sourced from the original manufacturer or authorized distributors?
All 74CBTLV3125QG 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 74CBTLV3125QG meets industry standards.
7.What is the process for return or replacement of 74CBTLV3125QG?
All 74CBTLV3125QG units undergo pre-shipment inspection (PSI). If there is an issue with 74CBTLV3125QG, 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 74CBTLV3125QG part is unused and in its original packaging.
Return procedure for 74CBTLV3125QG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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