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Renesas IDT74LVC245ASOG8
- Part No.:
- IDT74LVC245ASOG8
- Manufacturer:
- Renesas
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
IDT74LVC245ASOG8.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,728
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Product details
Overview
IDT74LVC245ASOG8 from Integrated Device Technology is a 3.3V CMOS octal bus transceiver with 3-state outputs and 5V-tolerant I/O, designed for bidirectional asynchronous data transfer between two 8-bit buses (A and B). It features ±24mA output drive strength, industrial temperature range (–40°C to +85°C), and rail-to-rail output swing for enhanced noise immunity in mixed-voltage systems.
For engineers reviewing the IDT74LVC245ASOG8 datasheet, IDT74LVC245ASOG8 pinout, IDT74LVC245ASOG8 application, or IDT74LVC245ASOG8 equivalent, key selection considerations include 5V-tolerant I/O compatibility, direction control (DIR) and output enable (OE) logic behavior, propagation delay (≤6.3 ns at 3.3V), 3-state output timing, and SOIC-20 package mechanical fit.
Technical Context
The IDT74LVC245ASOG8 implements dual-bus bidirectional translation via DIR-controlled signal flow and OE-gated 3-state output disable. Its input hysteresis (100 mV typical) improves noise margin in noisy environments, while all I/O pins tolerate up to 5.5V regardless of VCC (2.7V–3.6V).
It operates using 0.5 µm CMOS technology with CMOS-level static power consumption (0.4 µW typical), supports hot insertion, and delivers rail-to-rail output swing-enabling robust interfacing between 3.3V and 5V subsystems without level-shifting circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7V to 3.6V - supports extended supply tolerance for stable operation across voltage drift or ripple. |
| Output Drive | ±24mA - drives moderate-to-heavy capacitive loads (e.g., >50 pF) while maintaining sub-7 ns propagation delay. |
| I/O Voltage Tolerance | 0V to 6.5V - enables direct connection to 5V logic without external clamping or level shifters. |
| Propagation Delay | ≤6.3 ns (tPLH/tPHL, VCC = 3.3V) - ensures timing compliance in high-speed 8-bit parallel interfaces. |
| Input Hysteresis | 100 mV typical - suppresses false triggering on slow or noisy control signals like DIR and OE. |
| Quiescent ICC | ≤10 µA - minimizes standby power in battery-backed or low-power system states. |
| Operating Temp | –40°C to +85°C - certified for industrial-grade reliability without derating. |
Pinout & Package
Package: 20-pin SOIC (Small Outline IC, gull-wing), green RoHS-compliant variant (SOG suffix), body width 7.5 mm, standard JEDEC MS-013AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | A1–A8 Inputs/Outputs | Side A 8-bit bidirectional I/O port; driven by or sourced to Bus A. |
| 9 | GND | Ground reference for all internal logic and I/O buffers. |
| 10, 11, 12, 13, 14, 15, 16, 17 | B1–B8 Inputs/Outputs | Side B 8-bit bidirectional I/O port; driven by or sourced to Bus B. |
| 18 | VCC | Primary 3.3V supply; powers internal logic and output drivers. |
| 19 | DIR | Direction control input (active-HIGH): HIGH = A→B, LOW = B→A. |
| 20 | OE | Output enable input (active-LOW): LOW = enabled, HIGH = all outputs in high-impedance state. |
Key Features
| Feature | Design Value |
|---|---|
| 5V-tolerant I/O | Enables seamless integration into mixed 3.3V/5V systems without external level translators. |
| ±24mA output drive | Drives longer traces or multiple loads while preserving signal integrity and timing margins. |
| Input hysteresis (100 mV) | Rejects noise on DIR and OE control lines, preventing metastability during voltage transitions. |
| Rail-to-rail output swing | Maximizes noise margin by delivering VOH ≥ VCC – 0.2V and VOL ≤ 0.55V under full load. |
| Hot-insertion support | Allows safe board insertion/removal in live backplane or modular systems without damaging connected devices. |
Applications
| Industrial PLC Backplane Interface | Legacy 5V Microcontroller Expansion |
|---|---|
Use Scenario: Interfacing a modern 3.3V FPGA-based controller to legacy 5V I/O modules in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional voltage-translating bus transceiver managing data flow between FPGA-side (3.3V) and module-side (5V) address/data buses. Use Value: Eliminates need for discrete level shifters; maintains <7 ns propagation delay for deterministic cycle timing in real-time I/O scanning. | Use Scenario: Adding peripheral expansion capability to an aging 5V microcontroller design while integrating newer 3.3V sensors or memory. IC Role / Device Role / Timing Role: Octal bidirectional translator enabling 3.3V SPI flash or ADC to share a multiplexed 8-bit data bus with 5V peripherals. Use Value: Preserves existing PCB layout and firmware timing; 5V-tolerant inputs accept 5V control signals directly from MCU GPIO. |
| Telecom Line Card Voltage Bridging | Test Equipment Signal Conditioning |
Use Scenario: Isolating and translating control/data signals between 3.3V management ASIC and 5V analog front-end circuits on telecom line cards. IC Role / Device Role / Timing Role: Direction-controlled bus buffer providing galvanic separation and voltage domain bridging for configuration registers and status reporting. Use Value: Enables independent power sequencing; ±24mA drive sustains signal integrity over 10 cm trace lengths on dense line card layouts. | Use Scenario: Buffering and conditioning parallel test vectors between 3.3V pattern generator and 5V DUT (device under test) in automated test equipment. IC Role / Device Role / Timing Role: High-speed, low-skew (≤1 ns) transceiver ensuring synchronized delivery of 8-bit stimulus data with precise setup/hold timing. Use Value: Meets sub-10 ns timing windows required for high-speed digital test; 3-state outputs allow shared bus access among multiple test instruments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC245APWR | Same 3.3V VCC range, ±24mA drive, and 5V-tolerant I/O; identical functional block diagram and timing specs; TI's version uses slightly higher ICCZ (15 µA vs. 10 µA max). | Identical use cases; validated in TI's industrial reference designs for PLC backplanes. | Preferred when sourcing from TI-authorized channels or requiring TI-specific qualification documentation. |
| 74LVC245AD,212 | NXP variant in SO20 package; matches DC/AC specs but specifies lower max tPHL (5.5 ns) and includes bus-hold circuitry (not present in IDT74LVC245ASOG8). | Bus-hold eliminates need for external pull-ups on floating inputs-useful in hot-swap or unpopulated slot scenarios. | Select when input stability during undefined states is critical and bus-hold functionality is explicitly required. |
Compared with SN74LVC245APWR and 74LVC245AD,212, the IDT74LVC245ASOG8 offers tighter quiescent current (≤10 µA), no integrated bus-hold (reducing input leakage risk), and long-standing qualification in industrial telecom infrastructure-making it optimal for low-power, noise-sensitive, and legacy-system-replacement designs.
Availability
IDT74LVC245ASOG8 is available at Aetrix Electronics and suitable for industrial PLC backplanes, telecom line card voltage bridging, and legacy 5V microcontroller expansion requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for IDT74LVC245ASOG8 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, interface, memory interface, and RF solutions for communications, computing, and industrial markets.
The IDT74LVC245ASOG8 belongs to IDT's LVC logic family, engineered for low-voltage, high-speed, mixed-voltage system interconnect-specifically targeting industrial control, telecom infrastructure, and embedded data communication where reliability across temperature and voltage domains is essential.
FAQ
What is the maximum operating voltage on the I/O pins of the IDT74LVC245ASOG8?
The IDT74LVC245ASOG8 supports 5V-tolerant I/O: all A and B port pins, DIR, and OE accept input voltages from –0.5V to +6.5V regardless of VCC setting. This allows direct interfacing with 5V logic families without external protection or level-shifting components, and is verified per Absolute Maximum Ratings table in the official datasheet.
Does the IDT74LVC245ASOG8 support hot insertion, and how is this implemented?
Yes, the IDT74LVC245ASOG8 supports hot insertion. This is achieved through its 5V-tolerant I/O structure, power-off protection (IOFF leakage ≤ ±50 µA when VCC = 0V), and controlled output-enable sequencing. When inserted into a live system, the device remains in high-impedance state until OE is asserted, preventing bus contention-confirmed in the "Drive Features" and "Absolute Maximum Ratings" sections of the IDT74LVC245A datasheet.
What is the propagation delay specification for the IDT74LVC245ASOG8 at 3.3V supply?
At VCC = 3.3V ± 0.3V and TA = 25°C, the IDT74LVC245ASOG8 has a typical propagation delay (tPLH/tPHL) of 1.5 ns and a maximum of 6.3 ns. This value applies to both A→B and B→A directions and is measured under CL = 50 pF load conditions, as specified in the "Switching Characteristics" table of the official datasheet.
Is the IDT74LVC245ASOG8 pin-compatible with other LVC245 variants in SOIC-20 packages?
Yes, the IDT74LVC245ASOG8 is pin-compatible with industry-standard LVC245 transceivers in 20-pin SOIC packages-including SN74LVC245APWR and 74LVC245AD,212-sharing identical pinout, function mapping, and mechanical footprint. However, differences exist in bus-hold presence, ICCZ, and minor timing tolerances; always verify functional equivalence per application requirements before substitution.
What is the purpose of the hysteresis on the DIR and OE inputs of the IDT74LVC245ASOG8?
The IDT74LVC245ASOG8 incorporates 100 mV typical input hysteresis on DIR and OE to prevent oscillation or metastability when these control signals transition slowly or are exposed to electrical noise. This feature ensures clean, single-event state changes even with marginal rise/fall times-critical for reliable bus direction switching and output gating in electrically noisy industrial environments.
IDT74LVC245ASOG8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 74LVC
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Transceiver, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
IDT74LVC245ASOG8 FAQ
1.How can I place an order for IDT74LVC245ASOG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for IDT74LVC245ASOG8 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 IDT74LVC245ASOG8 reliable?
The price and inventory of IDT74LVC245ASOG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IDT74LVC245ASOG8 is usually 5 days.
3.What payment methods are accepted for IDT74LVC245ASOG8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IDT74LVC245ASOG8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IDT74LVC245ASOG8?
IDT74LVC245ASOG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IDT74LVC245ASOG8 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 IDT74LVC245ASOG8?
For technical support, including IDT74LVC245ASOG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IDT74LVC245ASOG8 requirements.
6.How does Aetrix verify that IDT74LVC245ASOG8 is sourced from the original manufacturer or authorized distributors?
All IDT74LVC245ASOG8 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 IDT74LVC245ASOG8 meets industry standards.
7.What is the process for return or replacement of IDT74LVC245ASOG8?
All IDT74LVC245ASOG8 units undergo pre-shipment inspection (PSI). If there is an issue with IDT74LVC245ASOG8, 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 IDT74LVC245ASOG8 part is unused and in its original packaging.
Return procedure for IDT74LVC245ASOG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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