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Renesas IDT74LVC4245APYG8
- Part No.:
- IDT74LVC4245APYG8
- Manufacturer:
- Renesas
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
IDT74LVC4245APYG8.pdf
- Description:
- IC TRANSLTR BIDIRECTIONAL 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,585
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Product details
Overview
IDT74LVC4245APYG8 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 flow between mixed-voltage buses in embedded control interfaces and legacy system upgrades.
For engineers reviewing the IDT74LVC4245APYG8 datasheet, IDT74LVC4245APYG8 pinout, IDT74LVC4245APYG8 application, or IDT74LVC4245APYG8 equivalent, key selection criteria include VCCA/VCCB rail separation, 3-state output timing (tPLZ ≤ 9.8 ns), hysteresis-enhanced noise immunity, and TSSOP-24 package compatibility with high-density PCB layouts.
Technical Context
The IDT74LVC4245APYG8 implements asynchronous bidirectional level translation using separate VCCA (5V ±0.5V) and VCCB (2.7V–3.6V) supplies, with DIR-controlled direction and OE-gated 3-state outputs. All I/O pins are 5V tolerant regardless of supply rail, enabling safe interfacing with legacy 5V logic while operating from a 3.3V domain.
Its ±24mA A-port drivers and ±12mA/±24mA B-port drivers support moderate-to-heavy capacitive loads without compromising propagation delay (tPLH/tPHL ≤ 6.7 ns). Input hysteresis (100 mV typ.) and rail-to-rail output swing further enhance noise margin in electrically noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCCA Supply | 5V ±0.5V - powers A-port (5V logic side); enables direct connection to legacy 5V systems |
| VCCB Supply | 2.7V–3.6V - powers B-port (3.3V logic side); compatible with LVC-family 3.3V microcontrollers |
| Propagation Delay | tPLH/tPHL ≤ 6.7 ns - ensures sub-150 MHz bus operation with deterministic timing margins |
| Output Drive | A-port: ±24mA; B-port: ±24mA at 3V - drives 50 pF loads while maintaining signal integrity |
| Input Hysteresis | 100 mV typical - rejects up to 100 mV of input noise without false triggering |
| Operating Temp | –40°C to +85°C - qualified for industrial automation, motor control, and factory-floor electronics |
| 3-State Enable Time | tPZL ≤ 9.8 ns (OE→Ax) - supports fast bus arbitration and dynamic port sharing |
Pinout & Package
Package: 24-pin TSSOP (PYG suffix), 0.65 mm pitch, body size 7.8 mm × 4.4 mm, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 20–22 | GND | Ground reference for both supply domains; decoupling required per rail |
| 2, 3, 4, 5, 6, 7, 8, 9 | A1–A8 | 5V-side bidirectional I/O; 5V-tolerant inputs when driven externally |
| 14–21 | B1–B8 | 3.3V-side bidirectional I/O; accepts 5V inputs without damage |
| 10 | OE | Active-low 3-state enable; overrides DIR to force high-impedance on both ports |
| 11 | DIR | Direction control: LOW = B→A, HIGH = A→B; synchronous with OE deassertion |
| 12 | VCCB | 3.3V supply for B-port logic and I/O; must be decoupled locally |
| 13, 23, 24 | VCCA | 5V supply for A-port logic and I/O; independent of VCCB for true level shifting |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail level translation | Independent VCCA (5V) and VCCB (3.3V) allow simultaneous 3.3V↔5V bidirectional data transfer without external resistors or translators |
| 5V-tolerant I/O | All A/B port pins withstand 5V input even when VCCB = 2.7V - eliminates need for external clamping diodes in mixed-voltage designs |
| Hysteresis-enhanced inputs | 100 mV typical hysteresis improves noise rejection in industrial EMI environments where ground bounce or crosstalk exceeds standard CMOS thresholds |
| Hot-insertion support | IOZH/IOZL ≤ ±5 µA in 3-state ensures minimal current surge during live board insertion - protects backplane and host controller |
| Rail-to-rail output swing | VOH ≥ 4.3V (A-port, IOH = –24mA), VOL ≤ 0.55V - maximizes noise margin against VCCA = 5V and VCCB = 3.3V logic thresholds |
Applications
| Industrial PLC Backplane Interface | Legacy 5V MCU to Modern 3.3V Peripheral Bridge |
|---|---|
|
Use Scenario: Connecting a 5V-rated fieldbus controller to a 3.3V FPGA-based I/O module in a programmable logic controller rack. IC Role / Device Role / Timing Role: Bidirectional level-shifting transceiver managing address/data strobes with tPLH ≤ 6.7 ns and OE-controlled bus release. Use Value: Eliminates discrete resistor networks and reduces BOM count by integrating 8-channel translation with ±24mA drive into a single TSSOP-24 package. |
Use Scenario: Interfacing a legacy 8051-based 5V subsystem with a new 3.3V sensor hub in an industrial gateway device. IC Role / Device Role / Timing Role: Direction-controlled bus bridge synchronizing burst-mode ADC reads and DAC writes across voltage domains. Use Value: Enables drop-in replacement of obsolete 5V-only transceivers while maintaining full signal integrity and meeting industrial temp requirements. |
| Automated Test Equipment (ATE) Signal Conditioning | Motor Drive Control Board Voltage Translation |
|
Use Scenario: Level-shifting digital control signals between 5V pattern generators and 3.3V DUT interface boards in semiconductor test fixtures. IC Role / Device Role / Timing Role: High-speed 3-state transceiver supporting <10 ns enable/disable transitions for precise signal gating. Use Value: Reduces setup time and jitter accumulation in multi-board test configurations via deterministic propagation and low-output-capacitance design. |
Use Scenario: Translating PWM and fault feedback signals between a 5V microcontroller and 3.3V gate driver ICs in a servo amplifier PCB. IC Role / Device Role / Timing Role: Robust bidirectional translator handling fast-switching control lines with hysteresis-filtered inputs to reject motor commutation noise. Use Value: Prevents false fault triggers and ensures reliable communication under high dv/dt conditions common in IGBT/MOSFET switching environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver and level-shifting applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC4245APWR | VCCB range 1.65V–3.6V; lower minimum VCCB enables 1.8V system integration; identical pinout and timing | Supports 1.8V logic domains (e.g., low-power FPGAs); not rated for industrial temp without derating | Select when interfacing with 1.8V peripherals and commercial temp suffices; verify thermal margin in enclosed enclosures |
| 74AVC4245PW,118 | Wider VCCB (1.2V–3.6V); higher speed (tPLH ≤ 4.2 ns); lower static current (ICCL ≤ 20 µA) | Optimized for battery-powered portable equipment; lacks industrial temp qualification (–40°C to +85°C) | Prefer for ultra-low-power or high-speed consumer applications; avoid where extended temperature compliance is mandatory |
Compared with IDT74LVC4245APYG8, SN74LVC4245APWR extends voltage flexibility downward but sacrifices guaranteed industrial operation, while 74AVC4245PW,118 improves speed and quiescent power at the cost of temperature rating - making IDT74LVC4245APYG8 the only option fully qualified for uncooled industrial environments requiring 5V↔3.3V translation.
Availability
IDT74LVC4245APYG8 is available at Aetrix Electronics and suitable for industrial PLC backplanes, motor drive control boards, automated test equipment signal conditioning, and legacy 5V MCU to modern 3.3V peripheral bridges requiring stable component supply across extended temperature ranges.
Supply support for IDT74LVC4245APYG8 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) is a fabless semiconductor company specializing in timing, memory interface, RF, and high-performance interconnect solutions, acquired by Renesas Electronics in 2019.
The IDT74LVC4245APYG8 belongs to IDT's LVC family of low-voltage CMOS transceivers, designed specifically for robust voltage-level bridging in industrial and telecom infrastructure where reliability across temperature extremes is non-negotiable.
FAQ
What is the maximum capacitive load the IDT74LVC4245APYG8 can drive while maintaining specified timing?
IDT74LVC4245APYG8 is characterized for CL = 50 pF in switching tests, with tPLH/tPHL ≤ 6.7 ns and tPZL ≤ 9.8 ns under those conditions. Its ±24mA A-port drivers support heavier loads than typical LVC devices, but exceeding 50 pF may increase propagation delay and reduce noise margin. For >50 pF designs, verify timing margins with actual board parasitics and consider local termination.
Can the IDT74LVC4245APYG8 operate with VCCB = 2.5V?
No - the IDT74LVC4245APYG8 specifies VCCB = 2.7V to 3.6V per DC electrical characteristics. Operation at 2.5V violates the absolute minimum supply rating and risks unreliable output levels, increased ICCZ, and potential functional failure. Use SN74LVC4245APWR if 2.5V operation is required.
Is the IDT74LVC4245APYG8 pin-compatible with the older IDT74LVC4245A SOIC version?
Yes - IDT74LVC4245APYG8 uses the same 24-pin TSSOP footprint as defined in IDT's package drawings for PYG, matching pin assignments and functions exactly with the SOIC (SO), SSOP (SOG), and QSOP (QG) variants of the same part number. No PCB redesign is needed when migrating from SOIC to TSSOP.
Does the IDT74LVC4245APYG8 require external pull-up or pull-down resistors on DIR or OE?
No - DIR and OE are CMOS inputs with IIH/IIL ≤ ±1 µA and internal hysteresis. They may float to indeterminate states; however, best practice is to tie OE to VCCA via a 10 kΩ resistor for default high-impedance, and DIR to GND or VCCA depending on fixed direction needs. External resistors prevent noise coupling but are not functionally required.
How does the IDT74LVC4245APYG8 handle simultaneous 5V inputs on B-port pins when VCCB = 3.3V?
IDT74LVC4245APYG8 explicitly guarantees 5V tolerance on all I/O pins regardless of VCCB voltage. When VCCB = 3.3V and a 5V signal is applied to B1–B8, internal protection circuitry clamps the input without damage or logic corruption. This allows safe connection to 5V buses without level-shifter pre-conditioning.
IDT74LVC4245APYG8 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 (0.209", 5.30mm Width)
IDT74LVC4245APYG8 FAQ
1.How can I place an order for IDT74LVC4245APYG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for IDT74LVC4245APYG8 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 IDT74LVC4245APYG8 reliable?
The price and inventory of IDT74LVC4245APYG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IDT74LVC4245APYG8 is usually 5 days.
3.What payment methods are accepted for IDT74LVC4245APYG8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IDT74LVC4245APYG8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IDT74LVC4245APYG8?
IDT74LVC4245APYG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IDT74LVC4245APYG8 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 IDT74LVC4245APYG8?
For technical support, including IDT74LVC4245APYG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IDT74LVC4245APYG8 requirements.
6.How does Aetrix verify that IDT74LVC4245APYG8 is sourced from the original manufacturer or authorized distributors?
All IDT74LVC4245APYG8 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 IDT74LVC4245APYG8 meets industry standards.
7.What is the process for return or replacement of IDT74LVC4245APYG8?
All IDT74LVC4245APYG8 units undergo pre-shipment inspection (PSI). If there is an issue with IDT74LVC4245APYG8, 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 IDT74LVC4245APYG8 part is unused and in its original packaging.
Return procedure for IDT74LVC4245APYG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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