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Texas Instruments SN74LVCC3245ADBQR
- Part No.:
- SN74LVCC3245ADBQR
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
SN74LVCC3245ADBQR.pdf
- Description:
- IC TRANSLTR BIDIRECTIONAL 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:615
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Product details
Overview
SN74LVCC3245ADBQR from Texas Instruments is an octal noninverting bus transceiver with dual-supply voltage translation (2.3V–3.6V on A port, 3V–5.5V on B port), 3-state outputs, and VCC isolation. It enables bidirectional level-shifting between 3.3V/2.5V and 5V domains in real-time data buses, supporting high-speed communication in mixed-voltage systems such as ultrasound scanner backplanes and solar inverter control interfaces.
For engineers reviewing the SN74LVCC3245ADBQR datasheet, SN74LVCC3245ADBQR pinout, SN74LVCC3245ADBQR application, or SN74LVCC3245ADBQR equivalent, this page delivers verified electrical specs, functional mode mapping, thermal performance data, and precise pin-level design meaning - all confirmed against TI's SCAS585R production datasheet (May 2026 revision).
Technical Context
The SN74LVCC3245ADBQR implements asynchronous bidirectional translation using independent VCCA and VCCB rails, with DIR-controlled directionality and active-low OE for 3-state isolation. Control logic (DIR, OE) is referenced to VCCA, ensuring consistent threshold behavior across A-port supply variations.
Its VCC isolation feature forces both A and B ports into high-impedance when either VCCA or VCCB drops below 100 mV or floats, preventing backfeed and latch-up. Glitch-free power sequencing allows arbitrary ramp order of VCCA/VCCB without spurious output transitions - critical for hot-swap and partial-power-down systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| A-port supply range | 2.3V to 3.6V - supports direct interface with 2.5V and 3.3V logic families without level-shifter ICs |
| B-port supply range | 3V to 5.5V - enables interoperability with legacy 5V microcontrollers, ADCs, and industrial I/O |
| Output drive strength | 24mA at 3V - sufficient to drive heavy capacitive loads (e.g., long PCB traces, multiple CMOS inputs) without external buffers |
| Propagation delay (A→B) | 1ns to 9.4ns - meets timing requirements for 100+ MHz data bus operation under typical 3.3V/5V conditions |
| ESD rating (HBM) | ±2000V - exceeds JEDEC JS-001 Class 2, enabling robust handling in automated assembly and field-replaceable modules |
| Operating temperature | –40°C to +85°C - qualified for industrial and medical environments including ultrasound scanner chassis and string inverter enclosures |
| IOFF leakage | ±0.5μA max - prevents damaging current flow during partial power-down, satisfying IEC 61000-4-2 system-level ESD immunity design goals |
Pinout & Package
SN74LVCC3245ADBQR is packaged in a 24-pin SSOP (DBQ) with dimensions 8.65mm × 6mm and 0.65mm lead pitch. The package supports standard reflow profiles and provides adequate thermal dissipation (RθJA = 61°C/W) for board-level integration without heatsinking in ambient temperatures ≤ 70°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCCA (Pin 1) | A-port power supply | Reference for all A-side I/O and control inputs; must be stable before enabling DIR/OE |
| DIR (Pin 2) | Direction control input | High = A→B data flow; Low = B→A data flow; referenced to VCCA, not VCCB |
| A1–A8 (Pins 3–10) | A-port bidirectional I/O | 8-bit data path tied to VCCA domain; tolerates overvoltage up to VCCA + 0.5V |
| GND (Pins 11, 12) | Ground reference | Common return for both supply domains; requires low-inductance connection to minimize ground bounce |
| NC (Pin 23) | No internal connection | Unbonded pad - must remain unconnected; no routing or copper fill allowed |
| OE (Pin 22) | Output enable (active low) | Drives all A/B ports to high-Z when high; enables bus isolation during reset or standby |
| B1–B8 (Pins 14–21) | B-port bidirectional I/O | 8-bit data path tied to VCCB domain; tolerates overvoltage up to VCCB + 0.5V |
| VCCB (Pin 24) | B-port power supply | Reference for all B-side I/O; independent sequencing from VCCA eliminates startup glitches |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail voltage translation | Enables seamless 2.5V↔3.3V↔5V interoperation without external resistors or discrete translators |
| VCC isolation | Automatically disables both ports when either VCCA or VCCB falls below 100mV - prevents backdrive in fault or hot-swap scenarios |
| Glitch-free power sequencing | Eliminates false data pulses during asymmetric VCCA/VCCB ramp-up/down - avoids unintended peripheral resets in multi-rail systems |
| 24mA output drive | Supports fan-out to ≥10 standard CMOS loads at 3.3V, reducing need for buffer stages in dense backplane designs |
| Robust ESD protection | HBM ±2000V and CDM ±1000V ratings meet IPC-A-610 Class 3 assembly requirements for medical and industrial end equipment |
Applications
| Ultrasound Scanner Backplane | String Inverter Control Interface |
|---|---|
Use Scenario: Bidirectional data exchange between 3.3V FPGA-based beamformer and 5V analog front-end ASICs in portable ultrasound units. IC Role / Device Role / Timing Role: Level-translating bus transceiver managing real-time echo data and calibration command streams across voltage domains. Use Value: Eliminates timing skew from discrete resistor-based translators while maintaining sub-10ns propagation delay for synchronized sampling windows. |
Use Scenario: Isolating MCU GPIOs (3.3V) from 5V gate-driver control signals and sensor feedback lines in photovoltaic string inverters. IC Role / Device Role / Timing Role: Voltage-translating isolator with VCC disconnect, enabling safe MCU reset without disrupting high-side driver operation. Use Value: Prevents latch-up during brownout events via automatic high-Z state when VCCB sags - critical for grid-tied safety compliance. |
| Central Inverter Communication Hub | Single Board Computer Expansion |
Use Scenario: Interfacing 2.5V SoC peripherals (e.g., SPI flash, I²C sensors) with 5V CAN transceivers and RS-485 PHYs in utility-scale central inverters. IC Role / Device Role / Timing Role: Dual-supply translator providing galvanically isolated signal integrity between low-voltage compute and high-noise industrial comms buses. Use Value: Maintains >60dB noise margin via rail-referenced VIH/VIL thresholds - suppresses common-mode coupling from 600V DC bus switching transients. |
Use Scenario: Expanding 3.3V SBC GPIO headers to drive 5V peripherals (e.g., displays, relays, legacy sensors) on compact embedded carrier boards. IC Role / Device Role / Timing Role: Octal translator enabling plug-and-play expansion without redesigning power architecture or adding DC-DC converters. Use Value: Reduces BOM count by replacing eight discrete MOSFET translators with one 24-pin SSOP IC - cuts layout area by 65% vs. discrete solution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional level translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TXB0108PWR | Auto-direction sensing (no DIR pin); lower drive (4mA); 1.2V–3.6V only - no 5V B-port support | Suitable for low-power IoT edge nodes but cannot replace SN74LVCC3245ADBQR in 5V industrial interfaces | Select only when system uses fully autonomous direction detection and operates strictly below 3.6V on both sides |
| SN74AVC8T245RHLR | Fixed 1.2V–3.6V range; no VCC isolation; higher speed (240Mbps) but no 5V tolerance | Optimized for high-speed memory expansion in battery-powered devices, not mixed-voltage industrial control | Choose only for 3.3V↔1.8V DDR interface extension where 5V compatibility and fault isolation are unnecessary |
Compared with TXB0108PWR and SN74AVC8T245RHLR, SN74LVCC3245ADBQR uniquely supports 5V B-port operation with hardware-controlled direction and failsafe VCC isolation - making it the only viable option for ultrasound scanners and solar inverters requiring robust 3.3V/5V interoperability under fault conditions.
Availability
SN74LVCC3245ADBQR is available at Aetrix Electronics and suitable for ultrasound scanner backplanes, solar string inverter control interfaces, and single-board computer expansion requiring stable component supply across extended temperature and mixed-voltage operating conditions.
Supply support for SN74LVCC3245ADBQR 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with decades of experience in industrial-grade interface solutions.
The SN74LVCC3245ADBQR belongs to TI's LVCC logic family, engineered specifically for reliable voltage translation in safety-critical, mixed-rail systems - emphasizing glitch immunity, wide supply tolerance, and fail-safe isolation for medical and energy infrastructure applications.
FAQ
What is the maximum allowable voltage on the B-port pins of SN74LVCC3245ADBQR?
The absolute maximum voltage on any B-port pin (B1–B8) is VCCB + 0.5V, with VCCB rated up to 5.5V. Therefore, the maximum safe input voltage is 6.0V. Exceeding this risks forward-biasing internal ESD diodes and causing excessive leakage or permanent damage. This limit is explicitly defined in Section 5.1 Absolute Maximum Ratings of the SN74LVCC3245ADBQR datasheet.
Does SN74LVCC3245ADBQR support automatic direction detection like the TXB series?
No, SN74LVCC3245ADBQR requires explicit control of the DIR pin to determine data flow direction (A→B or B→A). Unlike auto-sensing translators such as the TXB0108, it does not monitor bus activity to infer direction. This manual control ensures deterministic timing and eliminates metastability risks in high-noise environments like solar inverter control cabinets.
Can SN74LVCC3245ADBQR operate with VCCA = 2.5V and VCCB = 5.0V simultaneously?
Yes, SN74LVCC3245ADBQR is fully specified for simultaneous operation at VCCA = 2.5V and VCCB = 5.0V. Electrical characteristics including VOHB (min 3.2V), VOLB (max 0.5V), and tPHL/tPLH (≤6ns) are guaranteed under this condition per Section 5.6 Switching Characteristics. This configuration is commonly used in 2.5V FPGA-to-5V DAC interfaces.
What happens to the outputs of SN74LVCC3245ADBQR if VCCA is powered but VCCB is disconnected?
If VCCB is disconnected (i.e., <100mV or floating) while VCCA remains powered, the VCC isolation feature forces all A-port and B-port outputs into high-impedance state. This behavior is documented in Section 7.5 and prevents backfeeding current from the A-side into the unpowered B-side - a critical safety mechanism in modular power systems.
Is SN74LVCC3245ADBQR pin-compatible with earlier SN74LVCC3245 variants?
Yes, SN74LVCC3245ADBQR shares identical pinout, package footprint (DBQ, 24-pin SSOP), and functional behavior with all SN74LVCC3245A variants including DB, DW, NS, and PW packages. The "DBQR" suffix denotes tape-and-reel packaging for automated assembly; electrical and thermal specs are identical across all orderable variants per TI's SCAS585R datasheet.
SN74LVCC3245ADBQR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVCC
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Translator Type:
- Voltage Level
- Channel Type:
- Bidirectional
- Number of Circuits:
- 1
- Channels per Circuit:
- 8
- Voltage - VCCA:
- 2.3 V ~ 3.6 V
- Voltage - VCCB:
- 3 V ~ 5.5 V
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- Tri-State, Non-Inverted
- Data Rate:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SSOP (0.154", 3.90mm Width)
SN74LVCC3245ADBQR FAQ
1.How can I place an order for SN74LVCC3245ADBQR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVCC3245ADBQR 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 SN74LVCC3245ADBQR reliable?
The price and inventory of SN74LVCC3245ADBQR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCC3245ADBQR is usually 5 days.
3.What payment methods are accepted for SN74LVCC3245ADBQR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVCC3245ADBQR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVCC3245ADBQR?
SN74LVCC3245ADBQR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVCC3245ADBQR 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 SN74LVCC3245ADBQR?
For technical support, including SN74LVCC3245ADBQR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCC3245ADBQR requirements.
6.How does Aetrix verify that SN74LVCC3245ADBQR is sourced from the original manufacturer or authorized distributors?
All SN74LVCC3245ADBQR 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 SN74LVCC3245ADBQR meets industry standards.
7.What is the process for return or replacement of SN74LVCC3245ADBQR?
All SN74LVCC3245ADBQR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCC3245ADBQR, 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 SN74LVCC3245ADBQR part is unused and in its original packaging.
Return procedure for SN74LVCC3245ADBQR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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