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Renesas 74CBTLV3245QG
- Part No.:
- 74CBTLV3245QG
- Manufacturer:
- Renesas
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 20-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
74CBTLV3245QG.pdf
- Description:
- IC BUS SWITCH 8 X 1:1 20QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,475
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Product details
Overview
74CBTLV3245QG from Renesas Electronics is a low-voltage octal bus switch with bi-directional 5Ω A/B switches, operating from 2.3V to 3.6V supply, supporting industrial temperature range (−40°C to +85°C), and featuring power-off isolation and over-voltage tolerance for 3.3V high-speed bus switching applications.
For engineers reviewing the 74CBTLV3245QG datasheet, 74CBTLV3245QG pinout, 74CBTLV3245QG application, or 74CBTLV3245QG equivalent, key selection criteria include on-resistance (5–40Ω), propagation delay (≤0.25ns), output enable/disable timing (1–5ns), isolation current (IOFF ≤ 50µA), and QSOP-20 package compatibility with standard '245 logic footprints.
Technical Context
The 74CBTLV3245QG implements eight independent analog/digital bi-directional switches controlled by a single active-low Output Enable (OE) signal. When OE is low, ports A1–A8 are electrically connected to B1–B8 with typical on-resistance of 5Ω at VCC = 3V and IO = 24mA; when OE is high, both ports present high-impedance isolation.
It supports asynchronous bus communication between voltage domains up to 3.6V, maintains channel isolation during power-down (IOFF ≤ 50µA), and tolerates input voltages up to 4.6V regardless of VCC state - enabling safe hot-swap and level-shifting operation without external clamping.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3V to 3.6V - enables direct interface with 2.5V/3.3V logic systems 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 - supports >1 GHz bus switching with sub-nanosecond timing integrity |
| IOFF (Max) | 50µA at VCC = 0V - guarantees robust isolation during power sequencing or shutdown |
| VI/O Tolerance | −0.5V to +4.6V - allows safe interfacing with higher-voltage peripherals or hot-plug events |
| ESD Rating | 2000V HBM, 200V MM - meets industrial IEC 61000-4-2 system-level ESD robustness requirements |
| Operating Temp | −40°C to +85°C - qualified for industrial control, motor drives, and factory automation environments |
Pinout & Package
74CBTLV3245QG is housed in a 20-pin Quarter-Size Small Outline Package (QSOP), also designated PCG20, with 0.65mm lead pitch and JEDEC MO-137AC compliance. Pin spacing and thermal profile support reflow-compatible assembly in space-constrained industrial PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 20 | GND / VCC | Power reference and supply rail - decoupling capacitor placement critical for noise suppression |
| 2–9 | A1–A8 | Port A bidirectional I/O terminals - connect to upstream data bus or controller side |
| 11–18 | B1–B8 | Port B bidirectional I/O terminals - connect to downstream peripheral or memory bus |
| 10 | OE | Active-low output enable - must be pulled up to VCC during power-up to ensure default high-Z state |
| 19 | NC | No-connect - internally unconnected; leave floating or grounded per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| PINOUT COMPATIBILITY | Matches standard 74'245 logic pin assignment - enables drop-in replacement without PCB redesign |
| POWER-OFF ISOLATION | IOFF ≤ 50µA at VCC = 0V - prevents back-driving and leakage between powered/unpowered subsystems |
| OVER-VOLTAGE TOLERANCE | VI/O rated −0.5V to +4.6V - eliminates need for external clamping diodes in mixed-voltage systems |
| LATCH-UP IMMUNITY | Exceeds 100mA per JESD78 - ensures reliability in noisy industrial environments with transient coupling |
| LOW PROPAGATION DELAY | tPD ≤ 0.25ns - preserves signal integrity in DDR, PCIe Gen1, and parallel bus applications up to 1 Gbps |
Applications
| Industrial PLC Backplane Interfacing | Automotive Infotainment Data Multiplexing |
|---|---|
Use Scenario: Isolating CPU-side and I/O-module-side buses in modular programmable logic controllers during firmware updates or module hot-swap. IC Role / Device Role / Timing Role: Bidirectional bus switch enabling dynamic segmentation of 3.3V parallel control/data lines while maintaining signal integrity. Use Value: Prevents bus contention and ground bounce during live insertion/removal using power-off isolation and <50µA IOFF. | Use Scenario: Sharing a single high-speed serial or parallel interface between head unit MCU and multiple display/audio ICs in constrained infotainment SoC designs. IC Role / Device Role / Timing Role: Low-latency (≤0.25ns) bus switch routing video configuration data or audio control packets between shared resources. Use Value: Enables time-multiplexed access without protocol overhead, leveraging 5Ω RON to minimize rise/fall time degradation. |
| Test Equipment Signal Path Gating | Medical Imaging Data Bus Isolation |
Use Scenario: Enabling/disabling signal paths in automated test equipment (ATE) to route stimuli or capture responses across multiple DUT interfaces. IC Role / Device Role / Timing Role: Precision-controlled analog/digital gate with nanosecond enable/disable timing for synchronized stimulus delivery. Use Value: Achieves deterministic path selection via OE control with tEN/tDIS ≤ 4.5ns, reducing test cycle jitter. | Use Scenario: Segregating FPGA-configured image processing pipelines from sensor acquisition modules in portable ultrasound or MRI front-end boards. IC Role / Device Role / Timing Role: Voltage-tolerant (up to +4.6V) bus isolator protecting low-voltage imaging processors from sensor-side transients. Use Value: Eliminates external protection circuitry while meeting IEC 60601-1 creepage/safety margin requirements via intrinsic over-voltage rating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBTLV3245PWR | Same functionality and pinout; TI version uses TSSOP-20 (PW) instead of QSOP-20 (QG); RON spec identical (5Ω typ) | Requires footprint change from QSOP to TSSOP; same thermal and electrical behavior in board-level integration | Select when TSSOP-20 is preferred for automated optical inspection or tighter board area constraints |
| 74LVC245ABQ | Octal transceiver (direction-controlled), not a bus switch; requires DIR pin and separate direction logic; higher propagation delay (≥3ns) | Not suitable for transparent, bidirectional, zero-delay switching; intended for unidirectional data flow with direction arbitration | Choose only if direction control is required and nanosecond-level transparency is not critical |
Compared with SN74CBTLV3245PWR and 74LVC245ABQ, the 74CBTLV3245QG uniquely delivers true bidirectional, zero-propagation-delay switching in QSOP-20 - making it optimal for high-fidelity bus isolation where timing transparency and mechanical compatibility are mandatory.
Availability
74CBTLV3245QG is available at Aetrix Electronics and suitable for industrial PLC backplane interfacing, automotive infotainment multiplexing, and medical imaging data bus isolation requiring stable component supply and long-term lifecycle support.
Supply support for 74CBTLV3245QG 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 74CBTLV3245QG belongs to Renesas' legacy IDT logic portfolio, designed specifically for low-latency, high-isolation bus switching in industrial and communications equipment requiring robust voltage tolerance and seamless '245 footprint compatibility.
FAQ
What is the maximum operating voltage for 74CBTLV3245QG inputs and outputs?
The 74CBTLV3245QG supports an absolute maximum input/output voltage range of −0.5V to +4.6V, independent of VCC level. This over-voltage tolerance allows safe interfacing with 5V peripherals or transient events without external protection components, and is verified across the full industrial temperature range (−40°C to +85°C).
Does 74CBTLV3245QG require external pull-up resistors on the OE pin?
Yes - to guarantee high-impedance state during power-up or power-down, OE must be tied to VCC through a pull-up resistor. The 74CBTLV3245QG does not include internal pull-ups, and leaving OE floating risks undefined switch states. Typical values range from 4.7kΩ to 10kΩ depending on system noise immunity requirements.
Can 74CBTLV3245QG be used for level translation between 2.5V and 3.3V domains?
Yes - the 74CBTLV3245QG operates with VCC between 2.3V and 3.6V and tolerates VI/O up to +4.6V, enabling reliable bidirectional level shifting between 2.5V and 3.3V buses without additional circuitry. Its 5Ω typical on-resistance ensures minimal voltage drop and signal distortion across both domains.
What is the thermal resistance (θJA) of the 74CBTLV3245QG in QSOP-20 package?
The 74CBTLV3245QG in QSOP-20 (PCG20) package has a typical junction-to-ambient thermal resistance (θJA) of 120°C/W under standard JEDEC JESD51-2 conditions (single-layer copper, 1 in² pad). This value assumes no internal thermal vias; actual performance improves with enhanced PCB copper pour and thermal relief design.
Is 74CBTLV3245QG RoHS compliant and halogen-free?
Yes - the 74CBTLV3245QG is RoHS compliant and halogen-free per Renesas' product change notification PCN-2019-05-10, which updated ordering information to reflect green (lead-free, halogen-free) packaging. The "G" suffix in QG explicitly denotes RoHS-compliant, halogen-free material content.
74CBTLV3245QG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 74CBTLV
- Package/Case:
- 20-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Bus Switch
- Circuit:
- 8 x 1:1
- Independent Circuits:
- 1
- 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:
- 20-QSOP
74CBTLV3245QG FAQ
1.How can I place an order for 74CBTLV3245QG through Aetrix?
Please submit a Request for Quotation (RFQ) for 74CBTLV3245QG 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 74CBTLV3245QG reliable?
The price and inventory of 74CBTLV3245QG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74CBTLV3245QG is usually 5 days.
3.What payment methods are accepted for 74CBTLV3245QG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74CBTLV3245QG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74CBTLV3245QG?
74CBTLV3245QG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74CBTLV3245QG 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 74CBTLV3245QG?
For technical support, including 74CBTLV3245QG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74CBTLV3245QG requirements.
6.How does Aetrix verify that 74CBTLV3245QG is sourced from the original manufacturer or authorized distributors?
All 74CBTLV3245QG 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 74CBTLV3245QG meets industry standards.
7.What is the process for return or replacement of 74CBTLV3245QG?
All 74CBTLV3245QG units undergo pre-shipment inspection (PSI). If there is an issue with 74CBTLV3245QG, 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 74CBTLV3245QG part is unused and in its original packaging.
Return procedure for 74CBTLV3245QG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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