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Texas Instruments SN74LVCC3245ADBR
- Part No.:
- SN74LVCC3245ADBR
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
SN74LVCC3245ADBR.pdf
- Description:
- IC TRANSLTR BIDIRECTIONAL 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,153
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Product details
Overview
SN74LVCC3245ADBR from Texas Instruments is an octal noninverting bus transceiver with dual-supply level translation, supporting 2.3V–3.6V on A port and 3V–5.5V on B port, 24mA drive strength at 3V, VCC isolation, and 3-state outputs - used for bidirectional voltage-level bridging between 3.3V controllers and 5V peripherals in industrial power electronics.
For engineers reviewing the SN74LVCC3245ADBR datasheet, SN74LVCC3245ADBR pinout, SN74LVCC3245ADBR application, or SN74LVCC3245ADBR equivalent, key selection criteria include supply sequencing robustness, Ioff-enabled partial-power-down protection, glitch-free operation during asymmetric rail ramp-up/down, and verified 8-bit bidirectional translation across mixed-voltage domains.
Technical Context
The SN74LVCC3245ADBR implements independent A- and B-port supply rails (VCCA and VCCB), with control logic (DIR, OE) referenced exclusively to VCCA. Its bidirectional data flow is determined by DIR state, while OE enables/disables all I/Os into high-impedance mode - critical for bus isolation during hot-swap or low-power states.
VCC isolation ensures both ports enter high-Z when either VCCA or VCCB falls below 100mV or floats, preventing backdrive current. The device supports full Ioff functionality, limiting off-state leakage to ±2μA per I/O under partial power-down conditions - validated per JESD78.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| A-port supply range | 2.3V to 3.6V - enables direct interface with 2.5V/3.3V logic families without level-shifting circuitry |
| B-port supply range | 3V to 5.5V - supports legacy 5V peripherals and industrial microcontrollers |
| Drive strength | 24mA at 3V - sufficient to drive heavy capacitive loads (e.g., long PCB traces, multiple inputs) without signal degradation |
| Propagation delay | ≤9.4ns (A→B, VCCA=2.5V/VCCB=3.3V) - meets timing requirements for high-speed parallel bus applications up to ~100MHz |
| Off-state leakage (Ioff) | ±2μA max - prevents damaging back-current during system sleep or rail shutdown |
| ESD rating | ±2000V HBM - exceeds JEDEC JESD22-A114 for reliable handling in manufacturing and field service |
| Operating temperature | –40°C to +85°C - qualified for industrial ambient environments including solar inverters and medical imaging systems |
Pinout & Package
SN74LVCC3245ADBR is packaged in a 24-pin TSSOP (PW) with 7.8mm × 6.4mm footprint, optimized for space-constrained industrial PCB layouts and compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCCA | A-port power supply | Reference for A-side I/O and control inputs (DIR, OE); must be stable before enabling operation |
| VCCB | B-port power supply | Reference for B-side I/O only; independent sequencing allowed due to glitch-free architecture |
| DIR | Direction control input | High = A→B data flow; Low = B→A; referenced to VCCA, not VCCB |
| OE | Output enable (active-low) | Pulls all A/B I/Os into high-impedance state when high; enables bus isolation during standby |
| A1–A8 | A-port bidirectional I/Os | Interface with 2.3V–3.6V domain; tolerate overvoltage up to VCCA + 0.5V |
| B1–B8 | B-port bidirectional I/Os | Interface with 3V–5.5V domain; tolerate overvoltage up to VCCB + 0.5V |
| GND | Ground reference | Common return for both supply domains; requires low-inductance connection to minimize noise coupling |
| NC | No internal connection | Pins 13 and 23 are unconnected - must remain floating or grounded per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail level translation | Enables seamless 3.3V ↔ 5V bidirectional communication without external translators or direction logic |
| Glitch-free power sequencing | Eliminates false data transitions during asymmetric VCCA/VCCB ramp-up or ramp-down - critical for system reliability |
| VCC isolation | Automatically places all I/Os in high-Z if either VCCA or VCCB drops below 100mV or floats - prevents backdrive damage |
| Ioff partial-power-down | Limits off-state leakage to ±2μA, allowing safe insertion/removal in live backplanes or modular systems |
| Robust ESD protection | ±2000V HBM and ±1000V CDM - reduces field failure risk in handling-sensitive industrial assembly lines |
Applications
| Ultrasound Scanner | String Inverter |
|---|---|
Use Scenario: Interfacing FPGA-based beamformer (3.3V I/O) with analog front-end ASICs operating at 5V. IC Role / Device Role / Timing Role: Bidirectional data bridge synchronizing real-time echo sampling and digital processing paths. Use Value: Eliminates need for discrete level shifters per channel, reducing BOM count and board area in compact probe electronics. |
Use Scenario: Connecting MPPT controller (3.3V MCU) to isolated gate drivers and sensing ICs (5V supply). IC Role / Device Role / Timing Role: Voltage-translating control bus for PWM command and status feedback across isolated domains. Use Value: Maintains deterministic timing (<9.4ns delay) while enabling safe hot-plug of auxiliary modules without rail sequencing constraints. |
| Central Inverter | Single Board Computer |
Use Scenario: Linking 3.3V system management MCU to 5V power stage monitors and fault-reporting circuits. IC Role / Device Role / Timing Role: Isolated control/data path with VCC disconnect - ensures fail-safe shutdown when DC-link monitoring fails. Use Value: Prevents backfeed into powered-down MCU during brownout, meeting IEC 62109 functional safety requirements. |
Use Scenario: Expanding GPIO voltage compatibility between 3.3V SoC and 5V peripheral headers (e.g., RS-232, relays). IC Role / Device Role / Timing Role: Configurable bidirectional I/O expander with OE-controlled bus isolation during boot/reboot. Use Value: Enables single-board reuse across 3.3V and 5V peripheral ecosystems without hardware redesign. |
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; lower drive (12mA), no VCC isolation | Suitable only for sub-3.6V domains; cannot translate to 5V | Select when interfacing 1.8V/2.5V/3.3V buses only and space is constrained (QFN package) |
| TXB0108PWR | Auto-direction sensing (no DIR pin), 1.2V–3.6V I/O, no 5V support, higher propagation delay (26ns) | Requires no direction control logic but lacks deterministic timing for synchronous buses | Prefer for simple GPIO expansion where direction changes infrequently and 5V translation is unnecessary |
Compared with SN74AVC8T245RHLR and TXB0108PWR, SN74LVCC3245ADBR uniquely supports true 3V–5.5V B-port operation with guaranteed VCC isolation and sub-10ns propagation - making it the only viable option for industrial 5V peripheral interfacing requiring rail-agnostic sequencing and fail-safe isolation.
Availability
SN74LVCC3245ADBR is available at Aetrix Electronics and suitable for ultrasound scanner interfaces, solar string inverter control buses, and single-board computer peripheral expansion requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for SN74LVCC3245ADBR 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 industrial-grade interface solutions.
The SN74LVCC3245A belongs to TI's LVCC logic family, engineered specifically for robust bidirectional voltage translation in mixed-supply systems - targeting solar, medical, and factory automation applications demanding reliability under variable power conditions.
FAQ
What is the maximum allowable voltage on the B-port pins of SN74LVCC3245ADBR?
The absolute maximum voltage on any B-port pin (B1–B8) is VCCB + 0.5V, with VCCB rated up to 5.5V - meaning B-port pins tolerate up to 6V transiently. This overvoltage tolerance protects against overshoot during hot-swap events or ESD discharge, and is explicitly specified in Section 5.1 of the SN74LVCC3245ADBR datasheet.
Can SN74LVCC3245ADBR operate with VCCA = 2.5V and VCCB = 5V simultaneously?
Yes, SN74LVCC3245ADBR is fully specified for simultaneous operation at VCCA = 2.5V and VCCB = 5V. Electrical characteristics including VOHB (min 3.2V), VOLB (max 0.5V), and tPHL/tPLH (≤6ns) are validated under this condition per Section 5.6, enabling reliable 2.5V-to-5V and 5V-to-2.5V translation in real-world mixed-voltage systems.
Does SN74LVCC3245ADBR require specific power supply sequencing?
No - SN74LVCC3245ADBR features glitch-free power supply sequencing. Either VCCA or VCCB may be powered on/off in any order without causing output glitches or latch-up. This behavior is guaranteed by internal circuitry and confirmed in Section 7.4 of the SN74LVCC3245ADBR datasheet, eliminating sequencing constraints in complex multi-rail systems.
How does the VCC isolation feature function in SN74LVCC3245ADBR?
When either VCCA or VCCB drops below 100mV or is left floating, SN74LVCC3245ADBR automatically disables all A- and B-port outputs, forcing them into high-impedance state. This prevents backdrive current and unintended logic states - a hardware-enforced safety mechanism documented in Section 7.5 and Table 7-1 of the SN74LVCC3245ADBR datasheet.
What is the purpose of the NC pins on SN74LVCC3245ADBR?
Pins 13 and 23 on SN74LVCC3245ADBR are No-Connect (NC) terminals with no internal bonding. They must remain unconnected - neither tied to VCC nor GND - to avoid parasitic coupling or mechanical stress on the die. This requirement is explicitly stated in Table 4-1 and Figure 4-1 of the SN74LVCC3245ADBR datasheet.
SN74LVCC3245ADBR 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 (0.209", 5.30mm Width)
SN74LVCC3245ADBR FAQ
1.How can I place an order for SN74LVCC3245ADBR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVCC3245ADBR 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 SN74LVCC3245ADBR reliable?
The price and inventory of SN74LVCC3245ADBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCC3245ADBR is usually 5 days.
3.What payment methods are accepted for SN74LVCC3245ADBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVCC3245ADBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVCC3245ADBR?
SN74LVCC3245ADBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVCC3245ADBR 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 SN74LVCC3245ADBR?
For technical support, including SN74LVCC3245ADBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCC3245ADBR requirements.
6.How does Aetrix verify that SN74LVCC3245ADBR is sourced from the original manufacturer or authorized distributors?
All SN74LVCC3245ADBR 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 SN74LVCC3245ADBR meets industry standards.
7.What is the process for return or replacement of SN74LVCC3245ADBR?
All SN74LVCC3245ADBR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCC3245ADBR, 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 SN74LVCC3245ADBR part is unused and in its original packaging.
Return procedure for SN74LVCC3245ADBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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