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Texas Instruments SN74LVCC4245APW
- Part No.:
- SN74LVCC4245APW
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
SN74LVCC4245APW.pdf
- Description:
- IC TRANSLATOR BIDIR 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,464
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Product details
Overview
SN74LVCC4245APW from Texas Instruments is an octal dual-supply bus transceiver enabling bidirectional voltage-level translation between 5V (A port, VCCA = 4.5–5.5V) and 3.3V/5V (B port, VCCB = 2.7–5.5V) domains, with 24mA output drive at 3V, 3-state outputs controlled by DIR/OE, and robust glitch-free power sequencing. It serves in industrial motor control interfaces and distributed power systems requiring isolated bus communication.
For engineers reviewing the SN74LVCC4245APW datasheet, SN74LVCC4245APW pinout, SN74LVCC4245APW application, or SN74LVCC4245APW equivalent, key selection criteria include dual-rail Ioff protection, VCC isolation behavior (<100mV disable threshold), 8-channel noninverting data path, and TSSOP-24 package compatibility with legacy '245 footprints.
Technical Context
The SN74LVCC4245APW implements asynchronous bidirectional data transfer using a direction-controlled architecture: DIR input selects A→B or B→A flow, while OE (active-low, referenced to VCCA) enables/disables all I/Os into high-impedance state. Control logic is powered solely by VCCA, decoupling signal integrity from B-port supply variations.
Its dual-supply design supports true level-shifting without external components: VCCA powers A-side I/O and controls, VCCB powers B-side I/O, and internal circuitry prevents backflow via Ioff during partial power-down. The VCC isolation feature forces both ports into high-Z when either VCCA or VCCB drops below 100mV or floats-critical for hot-swap and fail-safe system partitioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCCA Range | 4.5V to 5.5V - powers A port and control logic (DIR/OE), defines VIH/VIL thresholds |
| VCCB Range | 2.7V to 5.5V - powers B port I/O, enables 3.3V↔5V bidirectional translation |
| Output Drive | ±24mA at 3V VCCB - supports heavier capacitive loads and longer PCB traces without buffering |
| Propagation Delay | 1ns to 7.4ns (CL = 50pF) - ensures timing compliance in high-speed industrial buses up to ~100MHz |
| Operating Temp | –40°C to +85°C - qualified for industrial ambient environments including servo drives and UPS modules |
| Ioff Leakage | ±2µA max - prevents damaging current backflow when either supply is off, enabling safe partial power-down |
| ESD Rating | 2000V HBM, 1000V CDM - meets industrial handling requirements without additional protection circuitry |
Pinout & Package
TSSOP-24 (PW) package: 9.7mm × 6.4mm body, 0.65mm pitch, surface-mount, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCCA | A-port supply and control logic rail - must be stable before enabling DIR/OE |
| 2 | DIR | Direction control input (VCCA-referenced) - low = B→A, high = A→B |
| 3–10 | A1–A8 | A-port bidirectional I/O - connect to 5V domain bus; tolerate 0–VCCA voltage range |
| 11,12,13 | GND | Ground reference - three pins minimize ground bounce in high-drive operation |
| 14–21 | B8–B1 | B-port bidirectional I/O - connect to 2.7–5.5V domain; tolerate 0–VCCB voltage range |
| 22 | OE | Active-low output enable (VCCA-referenced) - high = all I/Os in high-Z isolation |
| 23 | NC | No connect - must remain unconnected per TI specification |
| 24 | VCCB | B-port supply rail - independent of VCCA; enables flexible power domain partitioning |
Key Features
| Feature | Design Value |
|---|---|
| Glitch-free power sequencing | Either VCCA or VCCB may power up/down in any order without spurious I/O transitions - eliminates false resets in downstream peripherals |
| VCC isolation | Both A and B ports enter high-Z if either VCCA or VCCB <100mV or floats - enables safe hot-swap and fault containment |
| Configurable B-port output voltage | VCCB sets B-port logic levels (2.7–5.5V), allowing direct interface to 3.3V microcontrollers or 5V FPGAs without external level shifters |
| 24mA drive strength at 3V | Drives 50Ω transmission lines or >100pF loads directly - reduces need for external buffers in motor control feedback paths |
| Ioff partial-power-down protection | Prevents back-current flow when VCCA or VCCB is off - protects upstream supplies and avoids latch-up in multi-rail systems |
Applications
| Industrial Servo Drive Interface | Three-Phase UPS Communication Bus |
|---|---|
|
Use Scenario: Isolating FPGA-based motion controller (5V I/O) from 3.3V position encoder and current-sense ADC on servo power stage PCB. IC Role / Device Role / Timing Role: Bidirectional level translator and bus isolator - routes command data A→B and feedback data B→A with sub-8ns propagation delay. Use Value: Eliminates discrete resistor networks or dedicated level shifter ICs; Ioff and VCC isolation prevent encoder corruption during power sequencing faults. |
Use Scenario: Interfacing 5V digital control board with 3.3V monitoring MCU and CAN transceivers in modular UPS cabinet. IC Role / Device Role / Timing Role: Voltage-translating bus buffer - synchronizes status registers and fault flags across mixed-voltage subsystems. Use Value: Supports simultaneous 5V→3.3V and 3.3V→5V transfers on same device; ±24mA drive ensures reliable signaling over 15cm backplane traces. |
| PLC Digital I/O Module | Air Conditioner Outdoor Unit Controller |
|
Use Scenario: Connecting 5V PLC CPU bus to 3.3V field I/O expansion cards with optocoupler inputs and relay drivers. IC Role / Device Role / Timing Role: Direction-controlled data bridge - DIR toggled per read/write cycle; OE used for module hot-plug detection. Use Value: VCC isolation disables I/Os when field card is inserted/removed, preventing bus contention; –40°C to +85°C rating matches industrial enclosure specs. |
Use Scenario: Linking 5V HVAC microcontroller to 3.3V temperature/humidity sensors and inverter gate drivers in outdoor condenser unit. IC Role / Device Role / Timing Role: Robust bus transceiver - handles ESD events from humid environments and load switching noise. Use Value: 2000V HBM/1000V CDM ESD rating eliminates need for external TVS diodes; TSSOP-24 footprint fits space-constrained outdoor PCB layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC4245APW | Single-supply (3.3V only), no VCCB rail; lacks VCC isolation and Ioff; lower drive (24mA only at VCC=3.3V) | Only suitable for uniform 3.3V systems; cannot translate 5V↔3.3V bidirectionally | Select SN74LVCC4245APW when dual-rail translation, hot-swap safety, or 5V domain interfacing is required. |
| TXB0108PWR | Auto-direction sensing (no DIR pin), 1.2–3.6V and 1.65–5.5V rails, lower drive (±20mA), higher quiescent current | Eliminates DIR control wiring but adds latency; unsuitable for deterministic timing-critical paths | Choose SN74LVCC4245APW for DIR/OE-controlled deterministic data flow and industrial-grade ESD/thermal specs. |
Compared with SN74LVC4245APW and TXB0108PWR, the SN74LVCC4245APW uniquely delivers guaranteed 5V↔3.3V bidirectional translation with hardware-controlled direction, VCC isolation for fault containment, and industrial temperature/ESD ratings - making it the only option for safety-critical motor control and power conversion interfaces.
Availability
SN74LVCC4245APW is available at Aetrix Electronics and suitable for industrial servo drives, three-phase UPS systems, and PLC I/O modules requiring stable component supply, long-term lifecycle support, and traceable sourcing for production programs.
Supply support for SN74LVCC4245APW 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 SN74LVCC4245A belongs to TI's LVCC logic family, engineered specifically for robust voltage translation in harsh industrial environments where supply sequencing, ESD resilience, and fail-safe isolation are mandatory design requirements.
FAQ
What is the maximum allowable voltage difference between VCCA and VCCB for reliable operation of the SN74LVCC4245APW?
The SN74LVCC4245APW supports VCCA from 4.5V to 5.5V and VCCB from 2.7V to 5.5V independently. There is no specified maximum differential voltage limit between them - operation is valid across the full overlapping range (e.g., VCCA = 5.5V, VCCB = 2.7V). However, absolute maximum ratings require each supply to stay within –0.5V to 6V relative to GND, and I/O voltages must not exceed their respective VCC + 0.5V.
Does the SN74LVCC4245APW support hot-swap insertion when one supply rail is already active?
Yes. The SN74LVCC4245APW features glitch-free power sequencing and VCC isolation: if VCCA is active and VCCB is floated or ramped up later, all B-port I/Os remain in high-impedance until VCCB exceeds ~100mV. Similarly, disconnecting VCCB while VCCA is live forces B-port into high-Z, preventing bus contention - a core requirement for hot-swap-capable industrial backplanes.
Can the SN74LVCC4245APW be used to translate between 5V and 1.8V logic domains?
No. The SN74LVCC4245APW specifies VCCB minimum of 2.7V. Applying 1.8V to VCCB violates recommended operating conditions and risks undefined output behavior, excessive VOL/VOH error, or increased leakage. For 1.8V interfaces, TI recommends the TXS0108E or similar auto-sensing translators - the SN74LVCC4245APW is strictly rated for 2.7–5.5V on the B port.
How does the Ioff feature of the SN74LVCC4245APW protect downstream circuits during partial power-down?
The Ioff circuitry in the SN74LVCC4245APW actively disables all I/Os when either VCCA or VCCB is at 0V, limiting input/output leakage to ±2µA maximum. This prevents reverse current flow from a live rail (e.g., VCCB = 3.3V) into a powered-down domain (e.g., VCCA = 0V), avoiding unintended biasing, latch-up risk, or damage to upstream regulators - critical in multi-rail industrial controllers.
Is the SN74LVCC4245APW pin-compatible with standard 24-pin '245 transceivers like the SN74LVC245A?
No - the SN74LVCC4245APW uses a distinct pinout optimized for dual-supply operation (e.g., VCCA on Pin 1, VCCB on Pin 24, NC on Pin 23). While its TSSOP-24 footprint matches physical dimensions of SN74LVC245APW, signal assignments differ. TI confirms board layout reuse is possible only with intentional redesign of A/B port routing and power connections - it is not a drop-in replacement.
SN74LVCC4245APW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVCC
- Package/Case:
- Packaging:
- Tube
- Product Status:
- Active
- Translator Type:
- Voltage Level
- Channel Type:
- Bidirectional
- Number of Circuits:
- 1
- Channels per Circuit:
- 8
- Voltage - VCCA:
- 4.5 V ~ 5.5 V
- Voltage - VCCB:
- 2.7 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-TSSOP (0.173", 4.40mm Width)
SN74LVCC4245APW FAQ
1.How can I place an order for SN74LVCC4245APW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVCC4245APW 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 SN74LVCC4245APW reliable?
The price and inventory of SN74LVCC4245APW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCC4245APW is usually 5 days.
3.What payment methods are accepted for SN74LVCC4245APW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVCC4245APW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVCC4245APW?
SN74LVCC4245APW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVCC4245APW 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 SN74LVCC4245APW?
For technical support, including SN74LVCC4245APW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCC4245APW requirements.
6.How does Aetrix verify that SN74LVCC4245APW is sourced from the original manufacturer or authorized distributors?
All SN74LVCC4245APW 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 SN74LVCC4245APW meets industry standards.
7.What is the process for return or replacement of SN74LVCC4245APW?
All SN74LVCC4245APW units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCC4245APW, 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 SN74LVCC4245APW part is unused and in its original packaging.
Return procedure for SN74LVCC4245APW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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