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Texas Instruments SN74LVCC4245ADWRG4
- Part No.:
- SN74LVCC4245ADWRG4
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
SN74LVCC4245ADWRG4.pdf
- Description:
- IC TRANSLTR BIDIRECTIONAL 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,578
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Product details
Overview
SN74LVCC4245ADWRG4 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), with 24mA drive strength at 3V, 3-state outputs controlled by DIR/OE, and robust glitch-free power sequencing. It serves in industrial motor control interfaces where mixed-voltage subsystems require isolated, high-drive data exchange.
For engineers reviewing the SN74LVCC4245ADWRG4 datasheet, SN74LVCC4245ADWRG4 pinout, SN74LVCC4245ADWRG4 application, or SN74LVCC4245ADWRG4 equivalent, key selection criteria include dual-rail I/O voltage tracking, VCC isolation behavior below 100mV, Ioff-enabled partial power-down, and compatibility with legacy SN74LVC4245 layouts.
Technical Context
The SN74LVCC4245ADWRG4 implements asynchronous, direction-controlled bidirectional translation using separate VCCA (5V domain) and VCCB (configurable 2.7–5.5V domain) rails. Control logic (DIR, OE) is referenced to VCCA, ensuring consistent enable/disable thresholds regardless of B-port voltage.
Its architecture supports true VCC isolation: if either VCCA or VCCB drops below 100mV or floats, all I/Os enter high-impedance state without external intervention. The device meets JESD 17 latch-up (>250mA) and JESD 22 ESD ratings (2000V HBM, 1000V CDM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCCA Range | 4.5V to 5.5V - powers A-port I/O and control logic; defines VIH/VIL thresholds for DIR/OE |
| VCCB Range | 2.7V to 5.5V - configures B-port output voltage level; enables 3.3V↔5V bidirectional translation |
| Drive Strength | ±24mA at 3V VCCB - supports heavier capacitive loads and longer PCB traces without signal degradation |
| Propagation Delay | 1ns to 7.4ns (CL = 50pF) - ensures timing compliance in high-speed industrial bus interfaces up to ~100MHz |
| Operating Temperature | –40°C to +85°C - validated for use in outdoor power electronics and motor drive enclosures |
| Ioff Leakage | ±2µA max - prevents backflow current during partial power-down, protecting upstream/downstream circuitry |
| ESD Rating | 2000V HBM, 1000V CDM - exceeds industrial handling requirements per JESD 22 |
Pinout & Package
TSSOP-24 package (PW), 9.7mm × 6.4mm body size, 0.65mm pitch, surface-mount, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, VCCA | A-port supply rail | Powers A-side I/O buffers and DIR/OE control logic; sets input threshold references |
| 2, DIR | Direction control input | High = A→B data flow; Low = B→A data flow; referenced to VCCA |
| 3–10, A1–A8 | A-port bidirectional I/O | 8-bit data path for 5V domain; supports 24mA drive when VCCA = 4.5–5.5V |
| 11–13, GND | Ground reference | Three dedicated ground pins reduce impedance and improve noise immunity in high-drive operation |
| 14–21, B1–B8 | B-port bidirectional I/O | 8-bit data path tracking VCCB; output voltage follows VCCB (2.7–5.5V) |
| 22, OE | Output enable (active-low) | Drives all A/B ports to high-Z when high; referenced to VCCA |
| 23, NC | No-connect terminal | Internally unused; must remain unconnected per TI design |
| 24, VCCB | B-port supply rail | Sets B-port output voltage level and I/O thresholds; enables voltage translation flexibility |
Key Features
| Feature | Design Value |
|---|---|
| Glitch-free power sequencing | Either VCCA or VCCB may be powered on/off in any order without inducing false transitions on I/O lines |
| VCC isolation | Automatic high-impedance entry on both ports if either VCCA or VCCB falls below 100mV or floats |
| Configurable B-port voltage | VCCB directly sets B-port output swing (e.g., 3.3V or 5V), eliminating need for external level-shifting components |
| Ioff partial power-down | Prevents damaging back-current when one supply is off while the other remains active |
| SN74LVC4245 pinout alignment | Pins 2–11 and 14–23 match standard '245 layout, enabling drop-in replacement on existing 20-pin footprints |
Applications
| Industrial Motor Drives | Renewable Energy Inverters |
|---|---|
Use Scenario: Interfacing 5V microcontroller GPIOs to 3.3V gate drivers in servo power stages. IC Role / Device Role / Timing Role: Bidirectional voltage translator isolating control logic from high-noise power stage domains. Use Value: Eliminates discrete level-shifters while maintaining 24mA drive for fast MOSFET switching and supporting >10cm trace lengths. |
Use Scenario: Data exchange between 5V PLC master and 3.3V string monitoring ICs in photovoltaic string inverters. IC Role / Device Role / Timing Role: Asynchronous bus transceiver enabling reliable communication across mixed-voltage sensor and control subsystems. Use Value: VCC isolation prevents latch-up during intermittent B-port power cycling; operating range covers extended ambient temperatures. |
| Smart HVAC Systems | Programmable Logic Controllers |
Use Scenario: Connecting 5V HVAC controller MCU to 3.3V environmental sensors and display modules in outdoor units. IC Role / Device Role / Timing Role: Level-translating bus interface with configurable output voltage matching downstream 3.3V logic. Use Value: Robust ESD protection (2000V HBM) withstands field installation environments; wide VCCB range accommodates sensor supply variations. |
Use Scenario: Isolating 5V CPU bus from 3.3V I/O expansion modules in modular DCS/PLC backplanes. IC Role / Device Role / Timing Role: Octal transceiver providing galvanically isolated data paths via supply-rail separation and 3-state control. Use Value: DIR/OE logic referenced to VCCA ensures deterministic control even as VCCB varies across 2.7–5.5V range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC4245ADWR | Single-supply (3.3V only); no VCCB configurability; lower drive (24mA @ 3.3V vs. SN74LVCC4245ADWRG4's 24mA @ 3V) | Limited to 3.3V↔3.3V or 3.3V↔5V with external biasing; lacks VCC isolation and glitch-free sequencing | Select when cost-sensitive designs operate exclusively at 3.3V and do not require dual-rail autonomy. |
| TXB0108PWR | Auto-direction sensing; 1.2–3.6V and 1.65–5.5V rails; lower drive (±2mA typical); no DIR pin | Eliminates direction control wiring but introduces latency and potential bus contention risk in synchronous systems | Select for simple, low-power I²C/SPI translation where direction is predictable and timing margins are generous. |
Compared with SN74LVC4245ADWR and TXB0108PWR, the SN74LVCC4245ADWRG4 uniquely combines explicit DIR control, high drive strength, full VCC isolation, and guaranteed glitch-free sequencing-making it optimal for deterministic, noise-immune industrial bus bridging where supply sequencing cannot be controlled.
Availability
SN74LVCC4245ADWRG4 is available at Aetrix Electronics and suitable for industrial motor drives, renewable energy inverters, smart HVAC systems, and programmable logic controllers requiring stable component supply across extended temperature and mixed-voltage conditions.
Supply support for SN74LVCC4245ADWRG4 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 logic and interface solutions.
The SN74LVCC4245ADWRG4 belongs to TI's LVCC logic family, engineered specifically for robust voltage translation in harsh industrial environments where supply sequencing, ESD resilience, and high-drive capability are critical.
FAQ
What is the function of the NC pin (pin 23) on the SN74LVCC4245ADWRG4?
The NC (No Connect) pin on the SN74LVCC4245ADWRG4 is internally unconnected and must remain unattached in the PCB layout. TI specifies that pin 23 has no electrical function and should not be tied to VCC, GND, or any signal-doing so may compromise device reliability or violate thermal derating guidelines. This pin exists solely for mechanical symmetry in the TSSOP-24 package.
Does the SN74LVCC4245ADWRG4 support 2.5V operation on the B port?
No, the SN74LVCC4245ADWRG4 does not support 2.5V operation on the B port. Its specified VCCB range is 2.7V to 5.5V per the datasheet's Recommended Operating Conditions. Operation at 2.5V falls outside guaranteed specifications and may result in undefined output levels, increased propagation delay, or failure to meet VOH/VOL limits-particularly under load or temperature extremes.
How does the VCC isolation feature behave when VCCA = 0V and VCCB = 3.3V on the SN74LVCC4245ADWRG4?
When VCCA = 0V and VCCB = 3.3V, the SN74LVCC4245ADWRG4 enters VCC isolation mode: all A-port and B-port I/Os immediately transition to high-impedance state, regardless of DIR or OE states. This behavior is guaranteed because VCCA < 100mV triggers internal disable circuitry, preventing back-current flow and protecting both buses-even though VCCB remains active.
Can the SN74LVCC4245ADWRG4 replace SN74LVC4245ADWR on an existing PCB without layout changes?
Yes-the SN74LVCC4245ADWRG4 uses identical pinout mapping for functional pins (2–11 and 14–23) as the SN74LVC4245ADWR, allowing direct substitution on compatible SOIC-24 or TSSOP-24 footprints. However, VCCA and VCCB must be independently routed (not shorted), and OE/DIR logic must remain referenced to VCCA-not VCCB-to ensure correct operation.
What is the maximum capacitive load the SN74LVCC4245ADWRG4 can drive while maintaining specified timing?
The SN74LVCC4245ADWRG4 is characterized for CL = 50pF in its switching specifications, with propagation delays ranging from 1ns to 7.4ns. While it can physically drive higher capacitance (e.g., >100pF), timing margins degrade: tPLH/tPHL increase approximately linearly beyond 50pF, and edge rates slow. For designs exceeding 50pF, verify setup/hold timing against target clock frequency using TI's IBIS model or bench measurement.
SN74LVCC4245ADWRG4 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:
- 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-SOIC (0.295", 7.50mm Width)
SN74LVCC4245ADWRG4 FAQ
1.How can I place an order for SN74LVCC4245ADWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVCC4245ADWRG4 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 SN74LVCC4245ADWRG4 reliable?
The price and inventory of SN74LVCC4245ADWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCC4245ADWRG4 is usually 5 days.
3.What payment methods are accepted for SN74LVCC4245ADWRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVCC4245ADWRG4 transactions.
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4.How is shipping managed for SN74LVCC4245ADWRG4?
SN74LVCC4245ADWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVCC4245ADWRG4 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 SN74LVCC4245ADWRG4?
For technical support, including SN74LVCC4245ADWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCC4245ADWRG4 requirements.
6.How does Aetrix verify that SN74LVCC4245ADWRG4 is sourced from the original manufacturer or authorized distributors?
All SN74LVCC4245ADWRG4 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 SN74LVCC4245ADWRG4 meets industry standards.
7.What is the process for return or replacement of SN74LVCC4245ADWRG4?
All SN74LVCC4245ADWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCC4245ADWRG4, 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 SN74LVCC4245ADWRG4 part is unused and in its original packaging.
Return procedure for SN74LVCC4245ADWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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