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Texas Instruments SN74LVCC3245ANSRG4
- Part No.:
- SN74LVCC3245ANSRG4
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
SN74LVCC3245ANSRG4.pdf
- Description:
- IC TRANSLTR BIDIRECTIONAL 24SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,754
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Product details
Overview
SN74LVCC3245ANSRG4 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 2.5V/3.3V and 5V domains in real-time data buses, supporting up to 24mA drive strength at 3V and operating across –40°C to 85°C.
For engineers reviewing the SN74LVCC3245ANSRG4 datasheet, SN74LVCC3245ANSRG4 pinout, SN74LVCC3245ANSRG4 application, or SN74LVCC3245ANSRG4 equivalent, this device is critical for robust voltage-domain bridging in mixed-voltage embedded systems where glitch-free power sequencing, Ioff protection, and high-impedance isolation during partial power-down are required.
Technical Context
The SN74LVCC3245ANSRG4 implements asynchronous bidirectional data flow controlled by DIR and OE inputs referenced to VCCA. Its dual-rail architecture isolates A-port logic levels (2.3V–3.6V) from B-port levels (3V–5.5V), enabling true voltage translation without external level-shifting circuitry. The control logic remains powered solely by VCCA, decoupling direction and enable functions from B-port supply variations.
VCC isolation ensures both ports enter high-impedance state if either VCCA or VCCB falls below 100mV or floats - a key safety feature for hot-swap and partial-power-down scenarios. Glitch-free sequencing eliminates false transitions during asymmetric power-up/down, preventing misreads in ultrasound scanners or inverters where timing integrity is mission-critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| A-port supply range | 2.3V to 3.6V - supports 2.5V and 3.3V logic domains without level shifters |
| B-port supply range | 3V to 5.5V - interfaces directly with 5V microcontrollers, FPGAs, or legacy peripherals |
| Output drive strength | 24mA at 3V - drives heavier capacitive loads (e.g., long traces, multiple inputs) without signal degradation |
| Propagation delay (A→B) | 1ns to 9.4ns - enables high-speed data transfer in real-time industrial control loops |
| Operating temperature | –40°C to +85°C - qualified for industrial and medical environments including ultrasound scanner front-ends |
| Ioff leakage current | ±0.5μA max - prevents backflow current when one supply is off, protecting powered-down subsystems |
| ESD rating (HBM) | ±2000V - meets JEDEC JESD22-A114-A for handling in standard manufacturing environments |
Pinout & Package
TSSOP-24 package (7.8mm × 6.4mm), lead pitch 0.65mm, surface-mount, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCCA | A-port power supply | Powers A-side I/O and control logic; defines VIH/VIL thresholds for DIR/OE |
| VCCB | B-port power supply | Powers B-side I/O only; independent of VCCA for true dual-rail operation |
| DIR | Direction control input | High = A→B data flow; Low = B→A; referenced to VCCA, not VCCB |
| OE | Output enable (active low) | Low = transceiver enabled; High = all A/B I/Os in high-impedance state |
| A1–A8 | A-port bidirectional I/O | Connect to 2.3V–3.6V domain; tolerate up to VCCA + 0.5V input overvoltage |
| B1–B8 | B-port bidirectional I/O | Connect to 3V–5.5V domain; tolerate up to VCCB + 0.5V input overvoltage |
| GND | Ground reference | Common return for both supplies; must be connected before VCCA/VCCB per layout guidelines |
| NC | No internal connection | Pins 13 and 23 - electrically isolated; no routing or termination required |
Key Features
| Feature | Design Value |
|---|---|
| Dual-supply voltage translation | Enables seamless 2.5V↔5V, 3.3V↔5V, and 2.5V↔3.3V bidirectional data exchange without external components |
| VCC isolation | Automatically places all I/Os in high-impedance state if either VCCA or VCCB drops below 100mV - critical for hot-swap reliability |
| Glitch-free power sequencing | Eliminates false output transitions during asymmetric power-up/down - prevents spurious resets in connected peripherals |
| Ioff partial-power-down protection | Blocks damaging backflow current when one supply is off, preserving integrity of powered subsystems |
| 24mA drive capability | Supports driving 50pF loads at >10MHz while maintaining VOL ≤ 0.5V and VOH ≥ 2.2V under worst-case conditions |
Applications
| Ultrasound Scanner | String Inverter |
|---|---|
Use Scenario: Interfacing low-voltage FPGA-based beamformer (3.3V) with high-voltage analog front-end (5V) in portable ultrasound systems. IC Role / Device Role / Timing Role: Bidirectional voltage translator enabling real-time echo data transfer between domains while maintaining sub-10ns propagation delay. Use Value: Eliminates need for discrete level-shifters and reduces PCB area by 40% versus discrete solutions, improving thermal profile in compact handheld units. |
Use Scenario: Isolating MCU control signals (3.3V) from 5V gate drivers and sensor feedback in photovoltaic string-level inverters. IC Role / Device Role / Timing Role: Level-translating digital control bus with VCC isolation to prevent latch-up during DC-link voltage transients. Use Value: Survives repeated partial power-down events during MPPT cycling without requiring system reset or reinitialization. |
| Central Inverter | Single Board Computer |
Use Scenario: Bridging 2.5V SoC interface with 5V communication modules (RS-485, CAN transceivers) in grid-tied central inverters. IC Role / Device Role / Timing Role: Octal transceiver providing simultaneous address/data bus translation with Ioff-enabled safe shutdown during firmware updates. Use Value: Enables zero-downtime field upgrades by allowing 5V peripherals to remain powered while SoC domain is cycled. |
Use Scenario: Connecting 3.3V ARM processor GPIOs to legacy 5V expansion headers or peripheral cards on industrial SBCs. IC Role / Device Role / Timing Role: Direction-controlled bus buffer translating control/status signals while supporting hot-plug detection via OE-driven isolation. Use Value: Prevents damage from accidental 5V insertion into 3.3V-only slots through inherent overvoltage tolerance and Ioff protection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional level translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AVC8T245RHLR | Single-supply (1.2V–3.6V), no VCCB rail; lacks 5V B-port compatibility and VCC isolation | Suitable only for sub-3.6V domain bridging; cannot replace SN74LVCC3245ANSRG4 in 5V interface roles | Select only when interfacing two low-voltage domains (e.g., 1.8V ↔ 3.3V) and 5V support is unnecessary |
| TXB0308RUTR | Auto-direction sensing (no DIR pin); lower drive (12mA); no VCC isolation or Ioff specification | Requires pull-up/pull-down on data lines to detect direction; unsuitable for deterministic control in noise-prone inverter environments | Prefer for simple I²C/SPI bridges where direction is predictable; avoid in high-noise, safety-critical power electronics |
Compared with SN74AVC8T245RHLR and TXB0308RUTR, the SN74LVCC3245ANSRG4 uniquely supports 5V B-port operation, guaranteed VCC isolation below 100mV, and 24mA drive - making it the only viable option for industrial inverters and medical ultrasound systems requiring robust mixed-voltage interoperability.
Availability
SN74LVCC3245ANSRG4 is available at Aetrix Electronics and suitable for ultrasound scanner front-ends, photovoltaic string inverters, and industrial single-board computers requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for SN74LVCC3245ANSRG4 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 expertise in high-reliability interface ICs for industrial and medical applications.
The SN74LVCC3245ANSRG4 belongs to TI's LVCC logic family, designed specifically for robust voltage-domain bridging in mixed-supply systems where power sequencing resilience, Ioff protection, and precise timing control are mandatory.
FAQ
What is the maximum allowable voltage on the A-port I/O pins of the SN74LVCC3245ANSRG4?
The A-port I/O pins (A1–A8) tolerate input voltages up to VCCA + 0.5V, with an absolute maximum of 4.6V. This overvoltage tolerance allows safe interfacing with higher-voltage signals when VCCA is at its nominal 3.3V, but does not permit sustained operation above VCCA + 0.5V. The SN74LVCC3245ANSRG4 datasheet specifies this limit in Section 5.1 Absolute Maximum Ratings.
Can the SN74LVCC3245ANSRG4 operate with VCCA = 2.5V and VCCB = 5V simultaneously?
Yes, the SN74LVCC3245ANSRG4 is fully specified for simultaneous operation at VCCA = 2.5V and VCCB = 5V. Electrical characteristics including VOH (≥2.0V), VOL (≤0.6V), and tPHL/tPLH (≤9.4ns) are validated under this condition in Section 5.5 and 5.6 of the datasheet. This configuration enables direct 2.5V-to-5V bidirectional translation in applications like FPGA-to-ASIC interconnects.
How does the VCC isolation feature behave when VCCA is disconnected and VCCB remains at 5V?
When VCCA drops below 100mV or floats while VCCB remains at 5V, the SN74LVCC3245ANSRG4 forces all A1–A8 and B1–B8 pins into high-impedance state - regardless of DIR or OE states. This behavior is guaranteed by the VCC disconnect circuitry and prevents backfeeding or latch-up. The SN74LVCC3245ANSRG4 maintains this isolation down to 0V on either rail.
Is the SN74LVCC3245ANSRG4 pin-compatible with earlier SN74LVCC3245 variants?
Yes, the SN74LVCC3245ANSRG4 shares identical TSSOP-24 pinout, electrical specifications, and functional behavior with the base SN74LVCC3245A. The "G4" suffix denotes TI's green packaging standard (lead-free, RoHS-compliant), with no changes to pin assignment, timing, or voltage ratings. Designers may substitute SN74LVCC3245ANSRG4 without layout modification.
What is the recommended bypass capacitor configuration for SN74LVCC3245ANSRG4 in a 3.3V/5V system?
Texas Instruments recommends a 0.1μF ceramic capacitor placed as close as possible to each VCCA and VCCB pin, with optional parallel 1μF bulk capacitance near the power entry point. For the SN74LVCC3245ANSRG4, separate bypassing is mandatory - do not share capacitors between VCCA and VCCB rails. Layout guidelines in Section 8.4 specify placement within 3mm of respective power pins for optimal noise suppression.
SN74LVCC3245ANSRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVCC
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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-SOIC (0.209", 5.30mm Width)
SN74LVCC3245ANSRG4 FAQ
1.How can I place an order for SN74LVCC3245ANSRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVCC3245ANSRG4 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 SN74LVCC3245ANSRG4 reliable?
The price and inventory of SN74LVCC3245ANSRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCC3245ANSRG4 is usually 5 days.
3.What payment methods are accepted for SN74LVCC3245ANSRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVCC3245ANSRG4 transactions.
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4.How is shipping managed for SN74LVCC3245ANSRG4?
SN74LVCC3245ANSRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVCC3245ANSRG4 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 SN74LVCC3245ANSRG4?
For technical support, including SN74LVCC3245ANSRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCC3245ANSRG4 requirements.
6.How does Aetrix verify that SN74LVCC3245ANSRG4 is sourced from the original manufacturer or authorized distributors?
All SN74LVCC3245ANSRG4 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 SN74LVCC3245ANSRG4 meets industry standards.
7.What is the process for return or replacement of SN74LVCC3245ANSRG4?
All SN74LVCC3245ANSRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCC3245ANSRG4, 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 SN74LVCC3245ANSRG4 part is unused and in its original packaging.
Return procedure for SN74LVCC3245ANSRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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