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Renesas 74CBTLV3125PGG
- Part No.:
- 74CBTLV3125PGG
- Manufacturer:
- Renesas
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74CBTLV3125PGG.pdf
- Description:
- IC BUS SWITCH 1 X 1:1 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,003
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Product details
Overview
74CBTLV3125PGG from Renesas Electronics is a low-voltage quadruple bus switch IC featuring four independent 5Ω bi-directional analog switches, operating from 2.3V to 3.6V supply, with industrial temperature range (–40°C to +85°C), and designed for high-speed 3.3V bus isolation in memory and peripheral interconnects.
For engineers reviewing the 74CBTLV3125PGG datasheet, 74CBTLV3125PGG pinout, 74CBTLV3125PGG application, or 74CBTLV3125PGG equivalent, key selection criteria include on-resistance (≤8Ω typical), propagation delay (<0.25ns), power-off isolation, over-voltage tolerance up to 4.6V, and compatibility with standard '125 logic footprints in TSSOP-14 packaging.
Technical Context
The 74CBTLV3125PGG implements four independent CMOS transmission-gate-based bus switches, each controlled by a dedicated active-low output-enable (OE) input. Switch conduction is bidirectional with no inherent directionality, and the device maintains high-impedance isolation when OE is high or VCC = 0V.
It supports rail-to-rail analog/digital signal switching across A/B ports, with guaranteed over-voltage tolerance (–0.5V to +4.6V on I/O pins), latch-up immunity (>100mA), and ESD robustness (>2kV HBM, >200V MM). All control inputs must be actively driven to VCC or GND for reliable operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3V to 3.6V - Enables direct interface with 2.5V/3.3V logic without level shifters |
| RON (Typ) | 5Ω at VCC = 3V, IO = 24mA - Ensures minimal signal attenuation and skew in high-speed data paths |
| tPD (Max) | 0.25ns at VCC = 3.3V - Supports sub-nanosecond timing-critical bus gating in DDR and address/data multiplexing |
| IOFF (Max) | 50μA at VCC = 0V - Guarantees true power-off isolation for hot-swap and partial-power-down systems |
| VI/O Range | –0.5V to +4.6V - Allows safe interfacing with mixed-voltage domains and transient overvoltage conditions |
| ESD Rating | >2000V HBM, >200V MM - Meets industrial reliability requirements without external protection circuitry |
Pinout & Package
74CBTLV3125PGG is packaged in a 14-pin Thin Shrink Small Outline Package (TSSOP), lead-free and RoHS-compliant, with 0.65mm pitch and 5.0mm × 4.4mm body size.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | A Port Inputs/Outputs | Bi-directional analog/digital signal terminals for first through fourth switch channels |
| 2, 5, 11, 14 | B Port Inputs/Outputs | Paired bi-directional terminals connected to respective A ports when switch enabled |
| 3, 6, 12, 9 | OE1–OE4 | Active-low enable controls - each independently gates one A-B switch pair |
| 7 | GND | Ground reference for all internal circuitry and I/O return path |
| 14 | VCC | Primary power supply for switch core and control logic (2.3V–3.6V) |
Key Features
| Feature | Design Value |
|---|---|
| PIN-OUT COMPATIBILITY | Direct drop-in replacement for industry-standard '125 logic bus switches - no PCB redesign required |
| POWER-OFF ISOLATION | Maintains high-impedance state even when VCC = 0V - prevents back-driving and leakage in powered-down subsystems |
| OVER-VOLTAGE TOLERANCE | I/O pins withstand –0.5V to +4.6V regardless of VCC state - eliminates need for external clamping diodes |
| LATCH-UP IMMUNITY | Exceeds 100mA per JEDEC JESD78 - ensures robust operation under transient fault conditions |
Applications
| Memory Subsystem Isolation | PCI Express Lane Multiplexing |
|---|---|
Use Scenario: Isolating DDR2/DDR3 address and command buses between memory controller and multiple DIMM slots during power sequencing. IC Role / Device Role / Timing Role: Quad bus switch enabling/disabling parallel signal paths with sub-0.25ns propagation delay and zero hold-time impact. Use Value: Prevents signal contention during boot and sleep transitions while maintaining full-speed 3.3V signaling integrity. | Use Scenario: Dynamically routing PCIe Gen1/Gen2 lanes between CPU, chipset, and add-in cards in embedded server platforms. IC Role / Device Role / Timing Role: Low-RON analog switch providing transparent lane reconfiguration without protocol-aware logic. Use Value: Enables hardware-based lane sharing with <5Ω on-resistance and no added jitter or timing uncertainty. |
| Hot-Swappable I/O Expansion | Legacy Peripheral Interface Bridging |
Use Scenario: Safely connecting/removing USB or SATA daughter cards while main system remains powered. IC Role / Device Role / Timing Role: Power-fail-safe isolation gate ensuring I/O pins float to high-Z when VCC drops or OE is deasserted. Use Value: Eliminates risk of back-powering or ground-loop faults during live insertion/removal events. | Use Scenario: Interfacing 3.3V FPGA I/O banks with 5V legacy peripherals (e.g., UART, GPIO expanders) using level-tolerant switching. IC Role / Device Role / Timing Role: Over-voltage tolerant bus switch allowing 5V signals to pass safely across 3.3V domain boundary. Use Value: Avoids discrete level-shifter components while preserving signal rise/fall times and noise margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBTLV3125PWR | TI part in TSSOP-14; RON = 5Ω typ at 3.3V, tPD = 0.25ns max - functionally identical but different thermal resistance and drive strength specs | Validated in TI reference designs for PCIe and DDR3; slightly higher ICC (12μA vs 10μA) | Preferred where TI ecosystem support and long-term availability assurance are prioritized |
| 74LVC1G3157GW,125 | Nexperia single-channel variant in SOT363; requires four units for quad functionality; RON = 6Ω typ, VCC = 1.65–5.5V - wider voltage range but higher board area and routing complexity | Used in space-constrained portable designs requiring flexible supply voltage; lacks OE pin grouping | Select when design requires 1.8V operation or mixed-voltage flexibility beyond 3.3V-only use cases |
Compared with SN74CBTLV3125PWR and 74LVC1G3157GW,125, the 74CBTLV3125PGG offers integrated quad-channel control with unified OE management, lowest package footprint among equivalents, and Renesas-qualified industrial temperature performance - making it optimal for consolidated, high-reliability bus isolation in fixed-voltage embedded systems.
Availability
74CBTLV3125PGG is available at Aetrix Electronics and suitable for memory subsystem isolation, PCIe lane multiplexing, and hot-swappable I/O expansion requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for 74CBTLV3125PGG 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 74CBTLV3125PGG belongs to Renesas' legacy IDT logic portfolio, specifically engineered for low-latency, low-power bus switching in 3.3V digital systems requiring industrial-grade reliability and interoperability with standard logic families.
FAQ
What is the maximum operating voltage for the I/O pins of the 74CBTLV3125PGG?
The 74CBTLV3125PGG supports an absolute maximum I/O voltage range of –0.5V to +4.6V, independent of VCC level. This over-voltage tolerance allows safe interfacing with higher-voltage peripherals or transient conditions without external protection. The specification is validated per Absolute Maximum Ratings table in the official Renesas datasheet revision December 2014. This capability directly enables the 74CBTLV3125PGG to serve as a robust level-tolerant bus switch in mixed-voltage systems.
Does the 74CBTLV3125PGG require external pull-up resistors on its OE pins?
Yes - to ensure high-impedance state during power-up or power-down, each OE pin of the 74CBTLV3125PGG should be tied to VCC via a pull-up resistor. The minimum resistor value depends on the driver's current-sinking capability; typical values range from 10kΩ to 100kΩ. This requirement is explicitly stated in the device description section of the Renesas datasheet. Failure to implement proper OE biasing may result in undefined switch states during supply ramping, compromising system reliability. The 74CBTLV3125PGG does not integrate internal pull-ups.
Can the 74CBTLV3125PGG be used in 2.5V systems?
Yes - the 74CBTLV3125PGG is fully specified for operation from 2.3V to 3.6V, including 2.5V nominal systems. At VCC = 2.5V ± 0.2V, RON remains ≤8Ω (typical), tPD ≤0.15ns, and VIH/VIL thresholds scale accordingly. These parameters are confirmed in the DC Electrical Characteristics and Switching Characteristics tables of the Renesas datasheet. The 74CBTLV3125PGG thus supports both 2.5V and 3.3V logic domains without voltage translation, making it suitable for legacy and transitional digital interfaces.
Is the 74CBTLV3125PGG pin-compatible with the standard 74LS125?
No - while the 74CBTLV3125PGG is pin-out compatible with standard '125 logic products (e.g., 74ACT125, 74ALVC125), it is not pin-compatible with bipolar 74LS125 due to differing pin functions and electrical characteristics. The 74CBTLV3125PGG uses active-low OE control per channel and bi-directional A/B ports, whereas 74LS125 has active-high 3-state outputs and unidirectional buffers. The compatibility claim applies only to modern CMOS '125-family bus switches. This distinction is critical when substituting the 74CBTLV3125PGG into existing designs.
What is the thermal performance of the 74CBTLV3125PGG in TSSOP-14 package?
The 74CBTLV3125PGG in TSSOP-14 (PGG) package has a junction-to-ambient thermal resistance (θJA) of 158°C/W, as specified in Renesas' package documentation. Under typical operating conditions (VCC = 3.3V, all switches enabled, IO = 24mA per channel), power dissipation remains below 15mW, resulting in negligible junction temperature rise. This thermal profile supports continuous operation in industrial environments up to +85°C ambient without heatsinking. The 74CBTLV3125PGG's low static and dynamic power makes it ideal for thermally constrained layouts.
74CBTLV3125PGG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 74CBTLV
- Package/Case:
- 14-TSSOP (0.173", 4.40mm 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:
- 14-TSSOP
74CBTLV3125PGG FAQ
1.How can I place an order for 74CBTLV3125PGG through Aetrix?
Please submit a Request for Quotation (RFQ) for 74CBTLV3125PGG 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 74CBTLV3125PGG reliable?
The price and inventory of 74CBTLV3125PGG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74CBTLV3125PGG is usually 5 days.
3.What payment methods are accepted for 74CBTLV3125PGG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74CBTLV3125PGG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74CBTLV3125PGG?
74CBTLV3125PGG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74CBTLV3125PGG 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 74CBTLV3125PGG?
For technical support, including 74CBTLV3125PGG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74CBTLV3125PGG requirements.
6.How does Aetrix verify that 74CBTLV3125PGG is sourced from the original manufacturer or authorized distributors?
All 74CBTLV3125PGG 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 74CBTLV3125PGG meets industry standards.
7.What is the process for return or replacement of 74CBTLV3125PGG?
All 74CBTLV3125PGG units undergo pre-shipment inspection (PSI). If there is an issue with 74CBTLV3125PGG, 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 74CBTLV3125PGG part is unused and in its original packaging.
Return procedure for 74CBTLV3125PGG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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