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Renesas 74CBTLV3126PGG
- Part No.:
- 74CBTLV3126PGG
- Manufacturer:
- Renesas
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74CBTLV3126PGG.pdf
- Description:
- IC BUS SWITCH 1 X 1:1 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,910
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Product details
Overview
74CBTLV3126PGG 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 active-high output enable, power-off isolation, and industrial temperature range (–40°C to +85°C); used for 3.3V high-speed bus switching and isolation in memory expansion and peripheral interconnects.
For engineers reviewing the 74CBTLV3126PGG datasheet, 74CBTLV3126PGG pinout, 74CBTLV3126PGG application, or 74CBTLV3126PGG equivalent, key selection criteria include on-state resistance (RON ≤ 8Ω at 2.5V), propagation delay (≤0.25ns), OE-controlled switching timing, over-voltage tolerance up to 4.6V, and TSSOP-14 green package compatibility.
Technical Context
The 74CBTLV3126PGG implements four independent CMOS transmission-gate-based bus switches, each controlled by a dedicated active-high OE input. Switch conduction is bidirectional with no polarity dependence, and the device maintains high-impedance isolation when VCC = 0V or OE = LOW.
It supports mixed-voltage interfacing with over-voltage tolerant I/O (–0.5V to +4.6V), meets MIL-STD-883 ESD requirements (>2000V HBM), and features latch-up immunity exceeding 100mA per JEDEC JESD78. The design targets low-latency, low-distortion signal routing in 3.3V digital subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3V to 3.6V - Enables direct integration into 2.5V/3.3V logic domains without level shifters. |
| RON (Max) | 8Ω at VCC = 2.5V, IO = 64mA - Ensures minimal voltage drop and signal attenuation in high-current data paths. |
| tPD (Max) | 0.25ns at VCC = 3.3V - Supports sub-nanosecond timing-critical bus gating in high-speed memory and address lines. |
| IOFF (Max) | 50µA at VCC = 0V - Guarantees robust power-off isolation to prevent back-driving or leakage between powered/unpowered subsystems. |
| VI/O Tolerance | –0.5V to +4.6V - Allows safe interfacing with 5V-tolerant peripherals or hot-swap scenarios without external protection. |
| Operating Temp | –40°C to +85°C - Qualified for industrial-grade embedded control, networking, and instrumentation applications. |
Pinout & Package
TSSOP-14 green (RoHS-compliant) package with 0.65mm pitch; 14-pin thin shrink small outline profile optimized for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 7, 10 | A-side data terminal (1A–4A) | Input/output port for first side of each switch; bidirectional signal path when enabled. |
| 2, 5, 8, 11 | B-side data terminal (1B–4B) | Input/output port for second side of each switch; electrically identical to A-side under conduction. |
| 3, 6, 9, 12 | Output-enable control (1OE–4OE) | Active-high enable per switch; OE = LOW forces high-impedance isolation regardless of VCC state. |
| 13 | VCC | Primary power supply pin; must be decoupled locally to support fast switching transients. |
| 14 | GND | Ground reference for all internal circuitry and I/O terminals; shared return path for all four switches. |
Key Features
| Feature | Design Value |
|---|---|
| Pin-compatible with '126 logic family | Enables drop-in replacement in legacy 74-series bus switch designs without layout changes. |
| 5Ω typical on-resistance | Minimizes RC delay and signal distortion in high-frequency data/address bus applications. |
| Power-off isolation | Prevents current flow and signal coupling when VCC is unpowered - critical for hot-plug and modular systems. |
| Over-voltage tolerant I/O | Withstands transient overvoltages up to +4.6V and negative excursions to –0.5V without damage or latch-up. |
| Industrial temperature rating | Validated operation across –40°C to +85°C ambient - suitable for factory automation and outdoor telecom equipment. |
Applications
| Memory Expansion Interface | Peripheral Bus Isolation |
|---|---|
Use Scenario: Adding SRAM or Flash memory modules to microcontroller-based systems where address/data buses must be shared among multiple devices. IC Role / Device Role / Timing Role: Bidirectional bus switch enabling dynamic routing of address and data lines between MCU and memory banks. Use Value: Prevents bus contention during memory access arbitration while maintaining sub-nanosecond propagation delay and low RON. | Use Scenario: Isolating USB, UART, or SPI peripherals from main system bus during sleep or fault conditions. IC Role / Device Role / Timing Role: OE-controlled gate for selective peripheral enable/disable with zero static power draw in disabled state. Use Value: Eliminates leakage paths and reduces system standby current via guaranteed IOFF ≤ 50µA at VCC = 0V. |
| Hot-Swappable Module Interconnect | Level-Translation Signal Routing |
Use Scenario: Backplane or mezzanine card interfaces requiring live insertion/removal without disrupting host controller operation. IC Role / Device Role / Timing Role: Fault-isolated signal bridge that blocks back-driving and withstands ±0.5V to +4.6V I/O transients. Use Value: Enables safe hot-swap compliance through over-voltage tolerance and power-off isolation behavior. | Use Scenario: Connecting 3.3V FPGA I/O banks to 2.5V ASIC subsystems with minimal signal degradation. IC Role / Device Role / Timing Role: Passive bidirectional level shifter leveraging VCC-referenced RON and rail-to-rail I/O voltage range. Use Value: Achieves voltage-domain bridging without active translation circuitry or timing skew penalties. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBTLV3126PWR | Same function and pinout; TI version uses 0.5mm-pitch TSSOP-14; RON spec identical (5Ω typ). | Identical use cases; validated in TI reference designs for PCIe slot muxing and DDR2 address gating. | Select when sourcing from TI-authorized channels or requiring TI-specific qualification documentation. |
| 74LVC1G3157GW,125 | Single-channel variant in SOT363; higher RON (10Ω max at 3.3V); no multi-OE control per switch. | Suitable only for point-to-point isolation; not scalable to quad-bus architectures without parallel placement. | Choose only for space-constrained single-line isolation where quad integration is unnecessary. |
Compared with SN74CBTLV3126PWR, the 74CBTLV3126PGG offers identical electrical performance and pin compatibility but differs in packaging origin and RoHS compliance labeling; versus 74LVC1G3157GW,125, it delivers four independent switches in one package with lower RON and per-channel OE control - essential for multi-lane bus management.
Availability
74CBTLV3126PGG is available at Aetrix Electronics and suitable for memory expansion interface, peripheral bus isolation, and hot-swappable module interconnect applications requiring stable component supply and long-term industrial-grade availability.
Supply support for 74CBTLV3126PGG 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, SoCs, analog, and power solutions for automotive, industrial, and infrastructure markets.
The CBTLV family was designed specifically for low-voltage, high-speed digital bus switching in 2.5V/3.3V systems - emphasizing minimal propagation delay, low on-resistance, and robust isolation under power sequencing stress.
FAQ
What is the maximum allowable supply voltage for the 74CBTLV3126PGG?
The absolute maximum supply voltage (VCC) for the 74CBTLV3126PGG is +4.6V, though functional operation is specified only from 2.3V to 3.6V. Exceeding 3.6V may cause parametric deviation or reliability risk despite surviving short-term stress. Always operate within the recommended 2.3V–3.6V range for guaranteed timing, RON, and isolation performance in production systems using the 74CBTLV3126PGG.
Does the 74CBTLV3126PGG support bidirectional signal flow?
Yes, the 74CBTLV3126PGG supports fully bidirectional signal flow between each A and B terminal pair. There is no designated input or output - either side can source or sink current depending on system-level voltage differentials. This behavior is inherent to its transmission-gate architecture and is confirmed across all four switches in the 74CBTLV3126PGG, making it ideal for shared bus topologies like address/data multiplexing.
How does the 74CBTLV3126PGG behave when VCC is unpowered?
When VCC = 0V, the 74CBTLV3126PGG maintains high-impedance isolation between all A/B terminals, with IOFF ≤ 50µA, preventing back-driving or leakage. This power-off isolation is a core feature explicitly verified in the datasheet and applies regardless of OE state or I/O voltage levels up to ±0.5V. It ensures safe operation in modular or hot-swap systems using the 74CBTLV3126PGG.
What is the on-state resistance (RON) specification for the 74CBTLV3126PGG at 3.3V?
At VCC = 3.3V, the 74CBTLV3126PGG has a typical on-state resistance (RON) of 5Ω and a maximum of 7Ω under IO = 24mA test conditions. This value is measured between A and B terminals with the switch enabled and reflects worst-case conduction loss across process, voltage, and temperature corners. The low RON directly enables minimal voltage drop and signal integrity preservation in high-speed 3.3V bus applications using the 74CBTLV3126PGG.
Is the 74CBTLV3126PGG pin-compatible with standard 74-series '126 logic devices?
Yes, the 74CBTLV3126PGG is pin-out compatible with standard 74'126 logic products, including functionally equivalent TTL and CMOS variants. Its TSSOP-14 pin mapping matches industry-standard '126 bus switch layouts, allowing direct PCB replacement in existing designs. This compatibility is explicitly stated in the datasheet's FEATURES section and validated across all four switch channels and OE controls in the 74CBTLV3126PGG.
74CBTLV3126PGG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 74CBTLV
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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:
- 14-TSSOP
74CBTLV3126PGG FAQ
1.How can I place an order for 74CBTLV3126PGG through Aetrix?
Please submit a Request for Quotation (RFQ) for 74CBTLV3126PGG 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 74CBTLV3126PGG reliable?
The price and inventory of 74CBTLV3126PGG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74CBTLV3126PGG is usually 5 days.
3.What payment methods are accepted for 74CBTLV3126PGG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74CBTLV3126PGG transactions.
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4.How is shipping managed for 74CBTLV3126PGG?
74CBTLV3126PGG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74CBTLV3126PGG 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 74CBTLV3126PGG?
For technical support, including 74CBTLV3126PGG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74CBTLV3126PGG requirements.
6.How does Aetrix verify that 74CBTLV3126PGG is sourced from the original manufacturer or authorized distributors?
All 74CBTLV3126PGG 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 74CBTLV3126PGG meets industry standards.
7.What is the process for return or replacement of 74CBTLV3126PGG?
All 74CBTLV3126PGG units undergo pre-shipment inspection (PSI). If there is an issue with 74CBTLV3126PGG, 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 74CBTLV3126PGG part is unused and in its original packaging.
Return procedure for 74CBTLV3126PGG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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