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Renesas IDT74CBTLV3126QG8
- Part No.:
- IDT74CBTLV3126QG8
- Manufacturer:
- Renesas
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
IDT74CBTLV3126QG8.pdf
- Description:
- IC BUS SWITCH 1 X 1:1 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,828
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Product details
Overview
IDT74CBTLV3126QG8 from Renesas Electronics is a low-voltage quadruple bus switch IC with four independent 5Ω bi-directional analog switches, operating across VCC = 2.3V–3.6V and rated for −40°C to +85°C industrial temperature range; it features active-high output enable, power-off isolation, and over-voltage tolerance, used in 3.3V high-speed bus switching and isolation applications.
For engineers reviewing the IDT74CBTLV3126QG8 datasheet, IDT74CBTLV3126QG8 pinout, IDT74CBTLV3126QG8 application, or IDT74CBTLV3126QG8 equivalent, key selection considerations include on-state resistance (RON ≤ 8Ω at 2.5V/24mA), propagation delay (≤0.25ns), output enable timing (tEN/tDIS ≤ 4.8ns), and TSSOP-14 green package compatibility with standard '126 logic footprints.
Technical Context
The IDT74CBTLV3126QG8 implements four independent CMOS transmission-gate-based bus switches, each controlled by a dedicated active-high OE input. Its architecture enables true bi-directional signal flow with no internal directionality-A and B ports are functionally symmetric.
It supports hot-swap and partial-power-down operation via power-off isolation and over-voltage tolerant I/Os (−0.5V to +4.6V), while maintaining latch-up immunity (>100mA) and ESD robustness (>2kV HBM, >200V MM). The device requires no external biasing beyond OE pulldown for power-up safety.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3V–3.6V - Enables direct interface with 2.5V and 3.3V logic systems without level translation. |
| RON (Max) | 8Ω at VCC = 2.5V, IO = 24mA - Ensures minimal signal attenuation and voltage drop in high-speed data paths. |
| tPD (Max) | 0.25ns at VCC = 3.3V - Supports sub-nanosecond timing-critical bus switching in DDR and parallel interface designs. |
| tEN / tDIS (Max) | 4.8ns at VCC = 3.3V - Allows rapid dynamic bus reconfiguration with predictable enable/disable latency. |
| IOFF (Max) | 50µA at VCC = 0V - Guarantees effective channel isolation during system power sequencing or standby. |
| VI/O Tolerance | −0.5V to +4.6V - Permits safe connection to mixed-voltage buses and withstands transient overvoltages. |
| ESD Rating | 2000V HBM, 200V MM - Meets industrial reliability requirements for handling and board-level stress. |
Pinout & Package
Package: 14-pin TSSOP (Thin Shrink Small Outline Package), green RoHS-compliant, body size 5.0mm × 6.4mm × 1.2mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 7, 10 | A Port (Data Input/Output) | Bi-directional analog/data terminal for first through fourth switch; electrically identical to corresponding B port. |
| 2, 5, 8, 11 | B Port (Data Input/Output) | Paired bi-directional terminal for each switch; interchangeable with A port under all operating conditions. |
| 3, 6, 9, 12 | OE (Output Enable) | Active-high control input per switch; drives associated A–B path into high-Z when low. |
| 13 | VCC | Primary power supply input; must be decoupled locally to support fast switching transients. |
| 14 | GND | Ground reference for all logic and analog functions; shared return path for all four switches. |
Key Features
| Feature | Design Value |
|---|---|
| Pin-compatible with '126 logic family | Direct drop-in replacement for legacy 74LVC126, 74ALVC126, and similar quad buffer footprints in TSSOP-14. |
| 5Ω typical on-resistance | Minimizes insertion loss and timing skew in high-frequency digital and analog signal routing (e.g., clock fanout, address/data buses). |
| Power-off isolation | Prevents back-driving and leakage current between powered and unpowered subsystems during hot-plug or partial shutdown. |
| Over-voltage tolerant I/Os | Allows safe interfacing with 5V-tolerant peripherals or legacy components without external clamping diodes or resistors. |
| Latch-up immunity >100mA | Ensures robust operation in noisy industrial environments with ground bounce or supply transients. |
Applications
| PCI Express Slot Isolation | DDR Memory Bus Switching |
|---|---|
Use Scenario: Dynamic isolation of PCIe lanes during card hot-swap or firmware reconfiguration to prevent bus contention. IC Role / Device Role / Timing Role: Quad bus switch enabling/disabling four differential pairs independently with sub-5ns enable timing. Use Value: Eliminates need for complex FPGA-controlled multiplexing; maintains signal integrity with RON < 8Ω and tPD < 0.25ns. | Use Scenario: Selective routing of DDR2/DDR3 command/address lines between memory controller and dual-rank DIMMs. IC Role / Device Role / Timing Role: Low-latency bidirectional switch for CA bus segments, controlled by rank-select signals. Use Value: Reduces PCB layer count vs. mux-based solutions; preserves timing margin with guaranteed tEN/tDIS ≤ 4.8ns. |
| Industrial I/O Multiplexing | Legacy Interface Bridging |
Use Scenario: Sharing of 3.3V GPIO or UART lines among multiple microcontrollers in modular PLC backplanes. IC Role / Device Role / Timing Role: Four independent signal gates, each enabled by dedicated MCU control line. Use Value: Enables flexible hardware partitioning without software arbitration; supports hot-swap-safe isolation (IOFF ≤ 50µA). | Use Scenario: Interfacing modern 3.3V SoCs with older 5V peripheral ASICs or FPGAs in test equipment. IC Role / Device Role / Timing Role: Voltage-agnostic bus switch providing level-shifting-free connectivity between mismatched voltage domains. Use Value: Leverages ±0.5V to +4.6V I/O tolerance to eliminate discrete level shifters and reduce BOM cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBTLV3126PWR | Same 14-pin TSSOP package, identical RON (5Ω typ), but TI version specifies VCC = 2.3V–3.6V and −40°C to +85°C; slightly higher tPD (0.3ns max). | Valid for same 3.3V bus isolation use cases; not qualified for extended temp or automotive. | Preferred where TI supply chain preference or existing TI design reuse applies. |
| 74LVC126APW,118 | NXP part in TSSOP-14; buffered (non-analog-switch) architecture with 3-state outputs; higher propagation delay (~5ns), no power-off isolation. | Suitable only for unidirectional logic buffering-not for bi-directional analog/data switching or hot-swap isolation. | Select only if application requires logic-level buffering with enable, not true analog pass-through switching. |
Compared with SN74CBTLV3126PWR and 74LVC126APW,118, the IDT74CBTLV3126QG8 delivers superior bi-directional analog performance, lower latency, and guaranteed power-off isolation-making it uniquely suited for high-fidelity signal routing where transparency and safety during power transitions are critical.
Availability
IDT74CBTLV3126QG8 is available at Aetrix Electronics and suitable for industrial automation, embedded communications, and test instrumentation requiring stable component supply despite its obsolete status and limited new-design recommendation.
Supply support for IDT74CBTLV3126QG8 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 timing solutions for automotive, industrial, and infrastructure markets.
The IDT74CBTLV3126QG8 belongs to the IDT CBTLV (Configurable Bus Transceiver Low-Voltage) product line, engineered specifically for high-speed, low-latency, bi-directional bus switching in 2.5V/3.3V digital systems with stringent power sequencing and isolation requirements.
FAQ
Is IDT74CBTLV3126QG8 still in production?
No-IDT74CBTLV3126QG8 is marked obsolete by Renesas as of September 2019 and is not recommended for new designs. However, Aetrix Electronics maintains verified legacy inventory with full traceability and provides lifecycle coordination support to sustain existing production programs using IDT74CBTLV3126QG8.
What is the maximum continuous current per switch in IDT74CBTLV3126QG8?
The IDT74CBTLV3126QG8 supports up to 128mA continuous channel current per switch, as specified in Absolute Maximum Ratings. This rating applies under steady-state DC conditions with proper thermal management and ensures reliable operation without degradation when used within VCC = 2.3V–3.6V and TA = −40°C to +85°C.
Does IDT74CBTLV3126QG8 support hot-swap capability?
Yes-the IDT74CBTLV3126QG8 supports hot-swap operation due to its power-off isolation (IOFF ≤ 50µA at VCC = 0V) and over-voltage tolerant I/Os (−0.5V to +4.6V). These features prevent back-driving and latch-up during live insertion/removal, making IDT74CBTLV3126QG8 suitable for modular backplane and field-replaceable unit designs.
Can IDT74CBTLV3126QG8 replace 74LVC126 in existing PCB layouts?
Only functionally-not pin-for-pin. While IDT74CBTLV3126QG8 is pin-out compatible with standard '126 logic products in TSSOP-14, the 74LVC126 is a non-inverting buffer with 3-state outputs, whereas IDT74CBTLV3126QG8 is a bi-directional analog switch. Direct replacement requires circuit validation for signal directionality, loading, and timing; IDT74CBTLV3126QG8 cannot emulate 3-state logic behavior.
What is the recommended OE pulldown resistor value for IDT74CBTLV3126QG8?
Renesas recommends tying OE to GND via a pulldown resistor to ensure high-impedance state during power-up/down. The minimum resistor value depends on the driver's current-sinking capability; for typical 4mA sink drivers, a 10kΩ resistor is sufficient. The IDT74CBTLV3126QG8 datasheet confirms that OE must be held at GND or VCC-floating OE is prohibited.
IDT74CBTLV3126QG8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 74CBTLV
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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
IDT74CBTLV3126QG8 FAQ
1.How can I place an order for IDT74CBTLV3126QG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for IDT74CBTLV3126QG8 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 IDT74CBTLV3126QG8 reliable?
The price and inventory of IDT74CBTLV3126QG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IDT74CBTLV3126QG8 is usually 5 days.
3.What payment methods are accepted for IDT74CBTLV3126QG8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IDT74CBTLV3126QG8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IDT74CBTLV3126QG8?
IDT74CBTLV3126QG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IDT74CBTLV3126QG8 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 IDT74CBTLV3126QG8?
For technical support, including IDT74CBTLV3126QG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IDT74CBTLV3126QG8 requirements.
6.How does Aetrix verify that IDT74CBTLV3126QG8 is sourced from the original manufacturer or authorized distributors?
All IDT74CBTLV3126QG8 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 IDT74CBTLV3126QG8 meets industry standards.
7.What is the process for return or replacement of IDT74CBTLV3126QG8?
All IDT74CBTLV3126QG8 units undergo pre-shipment inspection (PSI). If there is an issue with IDT74CBTLV3126QG8, 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 IDT74CBTLV3126QG8 part is unused and in its original packaging.
Return procedure for IDT74CBTLV3126QG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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