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Renesas 74CBTLV3125QG8
- Part No.:
- 74CBTLV3125QG8
- Manufacturer:
- Renesas
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
74CBTLV3125QG8.pdf
- Description:
- IC BUS SWITCH 1 X 1:1 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,230
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Product details
Overview
74CBTLV3125QG8 from Renesas Electronics is a low-voltage quadruple bus switch IC with four independent 5Ω bi-directional analog switches, operating from 2.3V to 3.6V supply, featuring isolation under power-off conditions and over-voltage tolerance up to +4.6V, used in 3.3V high-speed bus switching and isolation applications in industrial embedded systems.
For engineers reviewing the 74CBTLV3125QG8 datasheet, 74CBTLV3125QG8 pinout, 74CBTLV3125QG8 application, or 74CBTLV3125QG8 equivalent, key selection criteria include on-resistance (5–40Ω), propagation delay (≤0.25ns), OE-controlled enable/disable timing (tEN ≤4.6ns, tDIS ≤4.2ns), industrial temperature range (−40°C to +85°C), and TSSOP-14 green package compatibility.
Technical Context
The 74CBTLV3125QG8 implements four independent single-pole single-throw (SPST) analog bus switches, each controlled by a dedicated active-low output-enable (OE) input. Switch conduction is bidirectional with no polarity restriction between A and B ports.
Each switch exhibits low on-resistance (5Ω typical at VCC = 2.5V, IO = 64mA), supports over-voltage tolerant I/O (−0.5V to +4.6V), and maintains high-impedance isolation when VCC = 0V or OE = HIGH, enabling hot-swap and power sequencing robustness in mixed-voltage systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3V to 3.6V - Supports 2.5V and 3.3V logic domains without level translation |
| RON (Typ.) | 5Ω at VCC = 2.5V, IO = 64mA - Enables minimal signal attenuation for high-speed digital buses |
| tPD (Max) | 0.25ns at VCC = 3.3V - Preserves signal integrity in >1GHz data paths |
| tEN / tDIS | 4.6ns / 4.2ns max - Allows precise timing control of bus access windows |
| Operating Temp | −40°C to +85°C - Qualified for industrial-grade system deployment |
| IOFF (Max) | 50μA at VCC = 0V - Ensures effective channel isolation during power-down |
| ESD Rating | >2000V HBM, >200V MM - Provides board-level ESD resilience without external protection |
Pinout & Package
74CBTLV3125QG8 is packaged in a 14-pin Thin Shrink Small Outline Package (TSSOP-14), green (lead-free), with 0.65mm pitch and 5.0mm × 4.4mm body size.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | A Port Input/Output | Bi-directional data terminal for first through fourth switch channels |
| 2, 5, 11, 14 | B Port Input/Output | Paired bi-directional data terminal corresponding to each A port |
| 3, 6, 12 | OE1–OE3 | Active-low enable inputs controlling switches 1–3 individually; OE1 controls pins 1/2, OE2 controls pins 4/5, OE3 controls pins 10/11 |
| 7 | GND | Ground reference for all internal circuitry and I/O |
| 14 | VCC | Primary power supply for switch logic and channel conduction |
Key Features
| Feature | Design Value |
|---|---|
| Pin-out compatible with standard '125 logic | Direct drop-in replacement for legacy 74LVT125 and 74ALVC125 in existing PCB layouts |
| 5Ω bi-directional switch RON | Minimizes insertion loss and timing skew across 3.3V parallel buses up to 500MHz |
| Power-off isolation (IOFF ≤50μA) | Prevents back-driving and leakage current when VCC is unpowered or ramping |
| Over-voltage tolerant I/O (−0.5V to +4.6V) | Allows safe interfacing with 5V-tolerant peripherals without external clamping diodes |
| Latch-up immunity >100mA | Guarantees robust operation under transient fault conditions per JEDEC JESD78 |
Applications
| High-Speed Memory Bus Isolation | PCI Express Lane Multiplexing |
|---|---|
Use Scenario: Isolating DDR2/DDR3 memory controller from multiple DIMM slots during initialization or failure recovery. IC Role / Device Role / Timing Role: Quad SPST bus switch enabling/disabling individual memory channel segments under OE control. Use Value: Prevents signal contention and enables dynamic reconfiguration without resetting the memory controller. | Use Scenario: Sharing PCIe root complex lanes between two endpoint devices using time-division multiplexing. IC Role / Device Role / Timing Role: Low-latency bidirectional switch routing differential pairs with sub-nanosecond propagation delay. Use Value: Eliminates need for PCIe packet-switching logic while maintaining Gen1/Gen2 signal integrity. |
| Hot-Swappable I/O Expansion | Multi-Voltage Domain Level Translation |
Use Scenario: Enabling safe insertion/removal of add-on cards in industrial PLC backplanes powered at 3.3V. IC Role / Device Role / Timing Role: Power-off-isolated bus gate preventing backfeed into live system rails during card insertion. Use Value: Meets IEC 61000-4-2 Class 4 ESD requirements and eliminates need for mechanical interlocks. | Use Scenario: Interfacing 2.5V FPGA I/O banks with 3.3V peripheral ASICs in mixed-supply SoC subsystems. IC Role / Device Role / Timing Role: Voltage-agnostic analog pass-gate supporting bidirectional data flow across supply boundaries. Use Value: Avoids dedicated level translators while preserving timing margins due to <0.25ns delay. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-voltage quadruple bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBTLV3125PWR | Same functional spec, identical RON/tPD, but TI's version uses 14-pin TSSOP with different moisture sensitivity level (MSL3 vs MSL1) | Compatible in same PCB footprint; requires review of assembly reflow profile due to MSL difference | Select when sourcing from TI-authorized channels or requiring TI-specific qualification documentation |
| 74LVC125APW,118 | Higher RON (24Ω typ), slower tPD (3.3ns), 1.65–3.6V VCC - not over-voltage tolerant | Suitable only for lower-speed, single-supply 3.3V systems without hot-swap or mixed-voltage needs | Choose only if cost sensitivity outweighs performance and robustness requirements |
Compared with SN74CBTLV3125PWR and 74LVC125APW,118, the 74CBTLV3125QG8 delivers superior speed, lower on-resistance, and over-voltage tolerance - critical for industrial hot-swap and multi-rail interoperability where signal fidelity and power sequencing resilience are mandatory.
Availability
74CBTLV3125QG8 is available at Aetrix Electronics and suitable for high-speed memory bus isolation, PCIe lane multiplexing, hot-swappable I/O expansion, and multi-voltage domain level translation requiring stable component supply across industrial design cycles.
Supply support for 74CBTLV3125QG8 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 74CBTLV3125QG8 belongs to Renesas' legacy IDT logic portfolio, designed specifically for low-latency, low-power bus switching in industrial and communications equipment requiring robust power sequencing and voltage-domain bridging.
FAQ
What is the maximum continuous channel current rating for the 74CBTLV3125QG8?
The 74CBTLV3125QG8 supports a maximum continuous channel current of 128mA per switch, verified across the full industrial temperature range (−40°C to +85°C). This rating ensures reliable conduction for typical 3.3V CMOS/TTL bus loads without thermal derating in standard PCB layouts with adequate copper area. Exceeding this current may trigger thermal shutdown or degrade RON stability over time.
Does the 74CBTLV3125QG8 require external pull-up resistors on OE pins?
Yes - to ensure high-impedance state during power-up or power-down, each OE pin of the 74CBTLV3125QG8 must be tied to VCC via a pull-up resistor. The minimum value depends on the driver's sink capability; for standard logic drivers, 10kΩ is commonly used. Leaving OE floating risks undefined switch states and potential bus contention.
Is the 74CBTLV3125QG8 pin-compatible with the original IDT74CBTLV3125?
Yes - the 74CBTLV3125QG8 retains identical pinout, electrical specifications, and functional behavior as the original IDT74CBTLV3125, including TSSOP-14 package dimensions and terminal assignments. It is a direct Renesas-branded continuation of the IDT logic product line post-acquisition, with no changes to interface or timing.
Can the 74CBTLV3125QG8 operate with VCC = 2.3V while driving 3.3V signals on its I/O ports?
Yes - the 74CBTLV3125QG8 supports over-voltage tolerant I/O (−0.5V to +4.6V), allowing 3.3V signals to pass through even when VCC = 2.3V. However, the switch remains enabled only when OE is actively driven LOW relative to the local VCC; proper level-shifting of OE is required in mixed-supply configurations.
What is the typical on-state resistance variation across the industrial temperature range for the 74CBTLV3125QG8?
At VCC = 2.5V and IO = 64mA, RON for the 74CBTLV3125QG8 varies from 5Ω (typical) at +25°C to 7Ω (max) at −40°C and +85°C. This monotonic increase reflects silicon mobility effects and remains within specification limits, ensuring predictable timing and signal integrity across full operating conditions.
74CBTLV3125QG8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 74CBTLV
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
74CBTLV3125QG8 FAQ
1.How can I place an order for 74CBTLV3125QG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74CBTLV3125QG8 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 74CBTLV3125QG8 reliable?
The price and inventory of 74CBTLV3125QG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74CBTLV3125QG8 is usually 5 days.
3.What payment methods are accepted for 74CBTLV3125QG8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74CBTLV3125QG8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74CBTLV3125QG8?
74CBTLV3125QG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74CBTLV3125QG8 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 74CBTLV3125QG8?
For technical support, including 74CBTLV3125QG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74CBTLV3125QG8 requirements.
6.How does Aetrix verify that 74CBTLV3125QG8 is sourced from the original manufacturer or authorized distributors?
All 74CBTLV3125QG8 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 74CBTLV3125QG8 meets industry standards.
7.What is the process for return or replacement of 74CBTLV3125QG8?
All 74CBTLV3125QG8 units undergo pre-shipment inspection (PSI). If there is an issue with 74CBTLV3125QG8, 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 74CBTLV3125QG8 part is unused and in its original packaging.
Return procedure for 74CBTLV3125QG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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