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Renesas IDT74LVC4245ASOG
- Part No.:
- IDT74LVC4245ASOG
- Manufacturer:
- Renesas
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
IDT74LVC4245ASOG.pdf
- Description:
- IC TRANSLTR BIDIRECTIONAL 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,696
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Product details
Overview
IDT74LVC4245ASOG from Integrated Device Technology is an octal noninverting bus transceiver with dual-supply voltage translation (3.3V ↔ 5V), ±24mA drive strength, industrial temperature range (–40°C to +85°C), and 5V-tolerant I/O. It enables bidirectional data transfer between mixed-voltage buses in embedded control and interface subsystems.
For engineers reviewing the IDT74LVC4245ASOG datasheet, IDT74LVC4245ASOG pinout, IDT74LVC4245ASOG application, or IDT74LVC4245ASOG equivalent, key selection criteria include direction control (DIR) logic, 3-state output enable (OE), VCCA/VCCB supply separation, rail-to-rail swing, and hot-insertion support in SOIC-24 packaging.
Technical Context
The IDT74LVC4245ASOG implements asynchronous bidirectional level translation using two independent supply rails: VCCA = 5V ±0.5V for the A port and VCCB = 2.7V–3.6V for the B port. Direction is controlled by DIR, while OE forces high-impedance on both ports regardless of DIR state.
All inputs feature hysteresis (100 mV typ.) for noise immunity; outputs deliver ±24mA drive at A port and ±24mA/±12mA at B port depending on VCCB. Propagation delays are ≤6.7 ns (A→B) and ≤6.3 ns (B→A), with enable/disable times under 10 ns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCCA Supply | 5V ±0.5V - powers A-port I/O and defines 5V logic thresholds |
| VCCB Supply | 2.7V–3.6V - powers B-port I/O and enables 3.3V system interfacing |
| Drive Strength | ±24mA at A port, ±24mA at B port (VCCB=3V) - drives moderate PCB traces and multiple CMOS loads |
| Propagation Delay | ≤6.7 ns (A→B), ≤6.3 ns (B→A) - supports >100 MHz bus timing in synchronous systems |
| Input Hysteresis | 100 mV typ. - improves noise margin against ground bounce and EMI in noisy industrial environments |
| IO Tolerance | 5V tolerant on all I/O pins - allows safe connection to legacy 5V peripherals without external protection |
| Operating Temp | –40°C to +85°C - qualified for industrial-grade embedded control and communications equipment |
Pinout & Package
Package: SOIC-24 (SOIC gull-wing, green, 300 mil width). Pin count: 24. Body dimensions: 15.4 mm × 7.5 mm × 2.35 mm. Lead pitch: 1.27 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 20 | VCCA (5V) | Main supply for A-port logic and output drivers; must be decoupled near pin |
| 2, 19, 11, 12 | GND | Common reference for both ports; low-inductance grounding critical for noise control |
| 3, 4, 5, 6, 7, 8, 9, 10 | A1–A8 | Bi-directional I/O for 5V bus; function as input or 3-state output per DIR/OE |
| 13, 14, 15, 16, 17, 18, 21, 22 | B1–B8 | Bi-directional I/O for 3.3V bus; electrically isolated from A port except via transceiver path |
| 14 | DIR | Active-HIGH direction control: HIGH = A→B, LOW = B→A; overrides only when OE is active |
| 1 | OE | Active-LOW output enable: LOW = enabled, HIGH = high-Z on both ports; priority over DIR |
| 24, 23 | VCCB (3.3V) | Supply for B-port logic and drivers; separate from VCCA to maintain voltage domain isolation |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Ensures full logic-level compliance across both 3.3V and 5V domains, maximizing noise margin |
| Hot-insertion support | Enables live replacement in backplane or modular systems without power cycling or bus lockup |
| ±24mA output drive | Drives up to 10 standard CMOS loads or 20 pF trace capacitance while maintaining timing integrity |
| 5V-tolerant I/O | Allows direct connection to 5V peripherals even when VCCB is powered at 3.3V, eliminating level-shifter ICs |
| Hysteresis on all inputs | 100 mV typical threshold separation reduces susceptibility to slow-edge or noisy signals in industrial wiring |
Applications
| Industrial PLC Backplane Interface | Embedded MCU Memory Expansion |
|---|---|
|
Use Scenario: Interfacing a 3.3V ARM Cortex-M7 microcontroller to legacy 5V SRAM and FPGA configuration memory on a programmable logic controller backplane. IC Role / Device Role / Timing Role: Bidirectional voltage translator and bus driver enabling synchronous read/write cycles across voltage domains. Use Value: Eliminates discrete resistor-based level shifters and ensures <6.7 ns propagation delay for sub-100 MHz memory access timing. |
Use Scenario: Connecting a 3.3V SoC's peripheral bus to 5V CAN transceivers and opto-isolated I/O modules in an automotive diagnostic tool. IC Role / Device Role / Timing Role: Isolated voltage-domain bridge with hot-swap capability for field-replaceable communication modules. Use Value: 5V-tolerant I/O prevents latch-up during module insertion; ±24mA drive sustains signal integrity over 15 cm ribbon cables. |
| Telecom Line Card Voltage Translation | Test Equipment Signal Conditioning |
|
Use Scenario: Level-shifting between 3.3V FPGA control logic and 5V analog front-end ASICs in a multi-rate telecom line card. IC Role / Device Role / Timing Role: Asynchronous bidirectional transceiver managing data flow direction via FPGA-controlled DIR signal. Use Value: Dual-supply architecture avoids shared ground noise coupling; hysteresis rejects crosstalk from adjacent high-speed SerDes lanes. |
Use Scenario: Adapting 3.3V pattern generator outputs to 5V DUT inputs in automated test equipment (ATE) fixture interfaces. IC Role / Device Role / Timing Role: Programmable 3-state buffer with OE-controlled isolation during test vector transitions. Use Value: Sub-10 ns enable/disable times prevent signal glitches during vector switching; rail-to-rail swing guarantees TTL-compatible thresholds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver and voltage translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC4245APW | TI part in TSSOP-24; identical electrical specs but different thermal resistance (θJA = 78°C/W vs. 90°C/W) and slightly higher ICCZ variation (600 µA vs. 500 µA) | Preferred for space-constrained PCBs where TSSOP footprint is acceptable; same functional behavior in mixed-voltage routing | Select when board layout favors narrow-body TSSOP and thermal derating margin is verified |
| 74LVC4245AD,118 | Nexperia SOIC-24 variant; matches VCCA/VCCB ranges and drive strength, but lacks explicit hot-insertion qualification and has lower max IOZH (±2 µA vs. ±5 µA) | Suitable for cost-sensitive industrial controls where hot-swap is not required; requires external series resistors if used in live-backplane contexts | Choose for non-hot-swap applications where supply chain diversification is prioritized over insertion robustness |
Compared with SN74LVC4245APW and 74LVC4245AD,118, the IDT74LVC4245ASOG offers verified hot-insertion support and tighter high-impedance leakage control-critical for modular telecom and test equipment where field upgrades occur without system shutdown.
Availability
IDT74LVC4245ASOG is available at Aetrix Electronics and suitable for industrial PLC backplanes, embedded memory expansion, telecom line cards, and automated test equipment requiring stable component supply across extended temperature operation and long product lifecycles.
Supply support for IDT74LVC4245ASOG 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, designs high-performance timing, interface, and memory solutions for communications, computing, and industrial markets.
The IDT74LVC4245ASOG belongs to IDT's LVC logic family, engineered specifically for robust voltage-domain bridging in mixed-signal industrial systems where reliability, noise immunity, and hot-swap capability are mandatory.
FAQ
What is the maximum allowable voltage on IDT74LVC4245ASOG I/O pins when VCCB is unpowered?
IDT74LVC4245ASOG I/O pins are 5V tolerant regardless of VCCB state, meaning they can withstand up to +6.5V (absolute max rating) even with VCCB = 0V. This enables safe hot-plug operation into live 5V buses. However, DC current into any pin must remain within ±50 mA, and sustained overvoltage beyond 5.5V risks latch-up unless current-limited externally. The device remains functional once VCCB is restored.
Can IDT74LVC4245ASOG translate from 5V to 3.3V and vice versa simultaneously?
No-IDT74LVC4245ASOG performs unidirectional translation per transaction, controlled by the DIR pin. When DIR = HIGH, data flows A→B (5V→3.3V); when DIR = LOW, data flows B→A (3.3V→5V). Simultaneous bidirectional translation on the same bus pair is not supported; concurrent use requires time-multiplexed control or separate transceivers per direction.
What decoupling is recommended for IDT74LVC4245ASOG VCCA and VCCB supplies?
Each supply rail (VCCA and VCCB) requires local 100 nF ceramic decoupling placed ≤5 mm from its respective pin, plus a bulk 4.7 µF tantalum or aluminum electrolytic capacitor within 15 mm. Separate ground planes or low-inductance traces should route GND returns directly to the nearest VCCA/VCCB decoupling node to minimize switching noise coupling between voltage domains.
Does IDT74LVC4245ASOG support bus-hold functionality?
No-IDT74LVC4245ASOG does not include bus-hold circuitry. The ordering code "74LVC4245A" (without 'X') explicitly denotes the non-bus-hold version. External pull-up/down resistors are required on floating A or B port lines to prevent undefined logic states during high-Z periods or power sequencing mismatches.
How does the hysteresis on IDT74LVC4245ASOG inputs improve system reliability?
IDT74LVC4245ASOG inputs feature 100 mV typical hysteresis, creating distinct HIGH and LOW thresholds (e.g., VIH ≈ 2.0V, VIL ≈ 0.8V). This prevents oscillation on slow-rising/falling edges or noisy signals-common in industrial wiring-and eliminates false triggering during ground bounce or EMI events, directly improving data integrity in harsh electromagnetic environments.
IDT74LVC4245ASOG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 74LVC
- Package/Case:
- Packaging:
- Tube
- 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-SOIC (0.295", 7.50mm Width)
IDT74LVC4245ASOG FAQ
1.How can I place an order for IDT74LVC4245ASOG through Aetrix?
Please submit a Request for Quotation (RFQ) for IDT74LVC4245ASOG 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 IDT74LVC4245ASOG reliable?
The price and inventory of IDT74LVC4245ASOG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IDT74LVC4245ASOG is usually 5 days.
3.What payment methods are accepted for IDT74LVC4245ASOG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IDT74LVC4245ASOG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IDT74LVC4245ASOG?
IDT74LVC4245ASOG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IDT74LVC4245ASOG 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 IDT74LVC4245ASOG?
For technical support, including IDT74LVC4245ASOG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IDT74LVC4245ASOG requirements.
6.How does Aetrix verify that IDT74LVC4245ASOG is sourced from the original manufacturer or authorized distributors?
All IDT74LVC4245ASOG 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 IDT74LVC4245ASOG meets industry standards.
7.What is the process for return or replacement of IDT74LVC4245ASOG?
All IDT74LVC4245ASOG units undergo pre-shipment inspection (PSI). If there is an issue with IDT74LVC4245ASOG, 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 IDT74LVC4245ASOG part is unused and in its original packaging.
Return procedure for IDT74LVC4245ASOG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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