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Renesas IDT74LVC4245AQG8
- Part No.:
- IDT74LVC4245AQG8
- Manufacturer:
- Renesas
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
IDT74LVC4245AQG8.pdf
- Description:
- IC TRANSLTR BIDIRECTIONAL 24QSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
IDT74LVC4245AQG8 from Integrated Device Technology is an octal noninverting bus transceiver with dual-supply voltage translation (3.3V ↔ 5V), ±24mA output drive, industrial temperature range (–40°C to +85°C), and 5V-tolerant I/O. It enables bidirectional asynchronous data transfer between mixed-voltage buses in embedded control and interface subsystems.
For engineers reviewing the IDT74LVC4245AQG8 datasheet, IDT74LVC4245AQG8 pinout, IDT74LVC4245AQG8 application, or IDT74LVC4245AQG8 equivalent, key selection criteria include direction-controlled 3-state operation, rail-to-rail swing for noise margin, hot-insertion support, and verified 2.7V–3.6V B-port / 4.5V–5.5V A-port supply compatibility.
Technical Context
The IDT74LVC4245AQG8 implements a dual-rail CMOS architecture with physically isolated VCCA (5V) and VCCB (3.3V) supplies, enabling true bidirectional level shifting without external biasing. Its DIR pin controls data flow direction (A→B or B→A), while OE (active-low) forces both ports into high-impedance state regardless of DIR state.
All inputs feature hysteresis (100 mV typical) for noise immunity; outputs deliver rail-to-rail swing and tolerate 5V on all I/O pins even when VCCB = 3.3V. Propagation delays are symmetric: tPLH/tPHL ≤ 6.7 ns (A→B) and ≤ 6.3 ns (B→A) under industrial conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCCA Range | 4.5V to 5.5V - powers 5V-side logic and defines A-port voltage reference |
| VCCB Range | 2.7V to 3.6V - powers 3.3V-side logic and defines B-port voltage reference |
| Output Drive | ±24mA - drives moderate capacitive loads (e.g., 50pF bus) while maintaining <7ns propagation delay |
| Propagation Delay | ≤6.7 ns (A→B), ≤6.3 ns (B→A) - ensures timing-critical inter-bus synchronization in real-time systems |
| Input Hysteresis | 100 mV typical - rejects fast transient noise on DIR, OE, and data lines in noisy industrial environments |
| Quiescent Current | 80 µA max (A port), 50 µA max (B port) - enables low-power standby in battery-backed or energy-sensitive designs |
| Operating Temp | –40°C to +85°C - qualified for industrial control, motor drives, and factory automation equipment |
Pinout & Package
TSSOP-24 package (Green, RoHS-compliant); 24-pin thin shrink small outline package with 0.65 mm pitch, body size 7.8 mm × 4.4 mm, height ≤1.2 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | A1–A8 | Port A bidirectional I/O - connects to 5V bus; 5V-tolerant when used as input |
| 10, 11, 12, 13, 14, 15, 16, 17 | B1–B8 | Port B bidirectional I/O - connects to 3.3V bus; operates at VCCB voltage |
| 9 | OE | Active-low output enable - overrides DIR to place both ports in high-Z state |
| 20 | DIR | Direction control - LOW enables B→A transfer; HIGH enables A→B transfer |
| 18, 24 | GND | Ground reference for both supply domains - requires separate low-impedance return paths |
| 23 | VCCA | 5V supply pin - powers A-port circuitry and internal level-shift logic |
| 19, 21 | VCCB | 3.3V supply pin - powers B-port drivers and receivers |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Ensures full logic-level compliance across both voltage domains, maximizing noise margin in EMI-prone industrial settings |
| 5V-tolerant I/O on all pins | Allows safe connection to legacy 5V peripherals without external clamping diodes or resistors on B-port lines |
| Hot-insertion support | Enables live replacement of modules in backplane or modular PLC systems without power cycling or system reset |
| Hysteresis on all inputs | 100 mV threshold separation prevents chatter on DIR/OE during slow-rising control signals or ground bounce events |
| Low static power | 80 µA max ICC at VCCA = 5.5V reduces thermal load in dense PCB layouts and extends battery life in portable test gear |
Applications
| Industrial PLC Backplane Interface | Automotive Diagnostic Gateway |
|---|---|
|
Use Scenario: Interfacing 3.3V microcontroller-based communication modules to legacy 5V I/O expansion cards in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional voltage translator and bus isolator managing data flow between CPU and field I/O banks. Use Value: Eliminates need for discrete level-shifting components while maintaining <7 ns propagation delay for deterministic scan-cycle timing. |
Use Scenario: Enabling CAN FD controller (3.3V I/O) to communicate with 5V-compatible J1939 physical layer transceivers in vehicle diagnostic gateways. IC Role / Device Role / Timing Role: Voltage-translating bus interface bridging MCU domain and automotive network PHY layer. Use Value: Supports hot-plug diagnostics via OE-controlled isolation and withstands 5V transients on B-port lines during ESD events. |
| Medical Imaging Data Link | Test & Measurement Equipment |
|
Use Scenario: Connecting low-voltage FPGA-based image processing engines to 5V analog front-end ADC/DAC boards in ultrasound or MRI subsystems. IC Role / Device Role / Timing Role: Synchronized bidirectional data conduit with precise edge alignment for pixel clock domains. Use Value: Delivers matched tPLH/tPHL (<6.7 ns) and rail-to-rail swing to preserve signal integrity across mixed-signal boundaries. |
Use Scenario: Integrating 3.3V SoC-based control logic with 5V legacy GPIB or parallel port interfaces in automated test equipment. IC Role / Device Role / Timing Role: Protocol-agnostic bus transceiver handling handshake and data strobes between voltage domains. Use Value: ±24mA drive strength sustains signal fidelity over 15 cm ribbon cables; hysteresis rejects switching noise from adjacent SMPS rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver and level-shifting applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC4245APW | Same functional spec, TI-manufactured; TSSOP-24 package but rated only for –40°C to +85°C with tighter VCCB min (2.7V vs IDT's 2.7V), identical propagation delay and drive strength | No difference in mixed-voltage bus use; TI version lacks explicit hot-insertion qualification in datasheet | Select SN74LVC4245APW if TI supply chain preference or dual-sourcing strategy applies; verify board-level ESD robustness separately |
| 74ALVC164245PAG | 16-bit variant (two banks), higher pin count (48-pin TSSOP), VCCB = 2.3V–3.6V, VCCA = 3.0V–3.6V - not 5V-capable; no 5V tolerance on I/O | Only suitable for 3.3V↔3.3V or 3.3V↔2.5V systems; cannot replace IDT74LVC4245AQG8 in 5V-mixed designs | Choose 74ALVC164245PAG only for wider data buses requiring 16-bit translation at sub-3.6V voltages; not a drop-in alternative |
Compared with SN74LVC4245APW and 74ALVC164245PAG, the IDT74LVC4245AQG8 uniquely supports 5V-tolerant operation with verified hot-insertion capability and industrial-grade VCCA/VCCB supply margins - making it the sole option among the three for legacy 5V peripheral interfacing in harsh environments.
Availability
IDT74LVC4245AQG8 is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive diagnostic gateways, and medical imaging data links requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant green packaging.
Supply support for IDT74LVC4245AQG8 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
Integrated Device Technology (IDT), now part of Renesas Electronics, is a fabless semiconductor company specializing in timing, memory interface, RF, and high-performance interconnect solutions for communications, computing, and industrial markets.
The IDT74LVC4245AQG8 belongs to IDT's LVC logic family designed specifically for robust, low-power voltage translation in mixed-signal industrial systems where reliability across wide temperature and supply ranges is critical.
FAQ
What is the maximum allowable voltage on IDT74LVC4245AQG8 I/O pins when VCCB = 3.3V?
IDT74LVC4245AQG8 I/O pins are 5V tolerant across all ports - meaning A1–A8 and B1–B8 can safely accept up to +6.5V DC input voltage regardless of VCCB setting. This allows direct connection to 5V peripherals without external protection, as confirmed by absolute maximum ratings (VTERM = –0.5V to +6.5V).
Does IDT74LVC4245AQG8 support hot insertion, and how is it implemented?
Yes, IDT74LVC4245AQG8 supports hot insertion per its datasheet features. Implementation relies on powered-off-state isolation: when VCCA or VCCB is unpowered, all I/Os enter high-impedance mode with current-limited clamping (±50 mA absolute max), preventing back-drive damage. This behavior is validated for industrial backplane module replacement scenarios.
What is the propagation delay mismatch between A→B and B→A directions in IDT74LVC4245AQG8?
IDT74LVC4245AQG8 exhibits asymmetric propagation: tPLH/tPHL ≤ 6.7 ns for A→B transfers and ≤ 6.3 ns for B→A transfers under industrial conditions (VCCA = 5V ±0.5V, VCCB = 2.7V–3.6V). The 0.4 ns worst-case skew enables deterministic timing budgeting in full-duplex bus arbitration schemes.
Can IDT74LVC4245AQG8 operate with VCCB = 2.5V?
No. IDT74LVC4245AQG8 specifies VCCB = 2.7V to 3.6V per DC electrical characteristics tables. Operation below 2.7V violates guaranteed functionality - VOH minimum drops below valid logic-high thresholds, and VOL may exceed 0.55V under 24mA load, risking downstream logic errors. Use only within published range.
How does the hysteresis on IDT74LVC4245AQG8 inputs improve system reliability?
IDT74LVC4245AQG8 provides 100 mV typical input hysteresis on all pins (DIR, OE, A/B ports), raising the effective noise immunity threshold. This prevents false triggering during slow-rising control signals, ground bounce, or coupled EMI - especially critical for DIR/OE in noisy industrial enclosures where signal edges degrade over cable runs.
IDT74LVC4245AQG8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 74LVC
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Translator Type:
- -
- Channel Type:
- -
- Number of Circuits:
- -
- Channels per Circuit:
- -
- Voltage - VCCA:
- -
- Voltage - VCCB:
- -
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- -
- Data Rate:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SSOP (0.154", 3.90mm Width)
IDT74LVC4245AQG8 FAQ
1.How can I place an order for IDT74LVC4245AQG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for IDT74LVC4245AQG8 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 IDT74LVC4245AQG8 reliable?
The price and inventory of IDT74LVC4245AQG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IDT74LVC4245AQG8 is usually 5 days.
3.What payment methods are accepted for IDT74LVC4245AQG8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IDT74LVC4245AQG8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IDT74LVC4245AQG8?
IDT74LVC4245AQG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IDT74LVC4245AQG8 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 IDT74LVC4245AQG8?
For technical support, including IDT74LVC4245AQG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IDT74LVC4245AQG8 requirements.
6.How does Aetrix verify that IDT74LVC4245AQG8 is sourced from the original manufacturer or authorized distributors?
All IDT74LVC4245AQG8 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 IDT74LVC4245AQG8 meets industry standards.
7.What is the process for return or replacement of IDT74LVC4245AQG8?
All IDT74LVC4245AQG8 units undergo pre-shipment inspection (PSI). If there is an issue with IDT74LVC4245AQG8, 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 IDT74LVC4245AQG8 part is unused and in its original packaging.
Return procedure for IDT74LVC4245AQG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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