My Inquiry
My Account
Renesas IDT74LVC245AQG
- Part No.:
- IDT74LVC245AQG
- Manufacturer:
- Renesas
- Package:
- 20-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
IDT74LVC245AQG.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 20QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,920
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
IDT74LVC245AQG 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. It features ±24mA output drive strength, rail-to-rail swing, hysteresis on all inputs, and operates across –40°C to +85°C industrial temperature range.
For engineers reviewing the IDT74LVC245AQG datasheet, IDT74LVC245AQG pinout, IDT74LVC245AQG application, or IDT74LVC245AQG equivalent, key selection criteria include 5V/3.3V mixed-voltage translation capability, 3-state control via OE/DIR, industrial-grade reliability, and compatibility with SOIC-20 (QG) packaging for legacy board designs.
Technical Context
The IDT74LVC245AQG implements dual-bus direction control using an active-low Output Enable (OE) that overrides DIR, enabling high-impedance isolation of both A and B ports. Its ±24mA drivers support moderate-load driving while maintaining sub-7ns propagation delay (tPLH/tPHL ≤ 6.3ns at VCC = 3.3V).
All I/O pins are 5V tolerant with rail-to-rail swing and input hysteresis (100mV typ.), allowing safe interfacing between 3.3V logic and 5V peripherals without level-shifting components. The device uses 0.5µm CMOS technology and delivers <0.4µW static power consumption.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7V to 3.6V - supports extended supply tolerance in noisy industrial rails |
| Output Drive | ±24mA - drives terminated lines or multiple TTL loads without external buffers |
| Propagation Delay | ≤6.3ns (tPLH/tPHL, VCC=3.3V) - enables reliable operation up to ~100MHz data rates |
| I/O Voltage Tolerance | 0V to 6.5V - allows direct connection to 5V systems without damage or clamping diodes |
| Input Hysteresis | 100mV typ. - improves noise immunity in electrically harsh environments |
| Operating Temp | –40°C to +85°C - qualified for industrial control, telecom, and embedded automation |
| Static ICC | ≤10µA - negligible quiescent current for low-power standby states |
Pinout & Package
Package: 20-pin SOIC (gull-wing), RoHS-compliant green variant (QG suffix). Pin count and mechanical dimensions match JEDEC MS-013AC standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19–20 | GND / VCC | Power reference and supply - decoupling required within 10mm of pins 1 and 20 |
| 2–9 | A1–A8 | Side-A bidirectional I/O - 5V-tolerant, hysteresis-enabled inputs/outputs |
| 11–18 | B1–B8 | Side-B bidirectional I/O - electrically identical to A-side, independent bus domain |
| 10 | OE | Active-low output enable - forces A/B ports into high-impedance when HIGH |
| 12 | DIR | Direction control - LOW = B→A, HIGH = A→B; overridden by OE |
Key Features
| Feature | Design Value |
|---|---|
| 5V-tolerant I/O | Enables seamless integration in mixed-supply systems without external level shifters |
| Rail-to-rail output swing | Maximizes noise margin in high-noise industrial environments (e.g., motor drives) |
| Hot-insertion support | Prevents bus contention during live card insertion via controlled I/O state transitions |
| Hysteresis on all inputs | Reduces susceptibility to slow-edge or noisy signals common in long PCB traces |
| ±24mA output drive | Drives 50Ω transmission lines or fan-out of ≥10 LVTTL loads directly |
Applications
| Industrial PLC Backplane Interface | Legacy 5V Microcontroller Expansion |
|---|---|
Use Scenario: Connecting a 3.3V FPGA-based controller to a 5V analog I/O module over a 20cm backplane trace. IC Role / Device Role / Timing Role: Bidirectional voltage-level translator and bus isolator with configurable direction control. Use Value: Eliminates need for discrete level shifters while maintaining signal integrity under EMI exposure. | Use Scenario: Adding a 3.3V peripheral (e.g., SPI ADC) to an existing 5V 8051-based system without modifying power rails. IC Role / Device Role / Timing Role: Asynchronous data bridge with 3-state isolation during CPU reset or sleep modes. Use Value: Enables drop-in peripheral upgrades with no PCB redesign or firmware changes. |
| Telecom Line Card Data Mux | Automated Test Equipment (ATE) Signal Routing |
Use Scenario: Multiplexing diagnostic data streams between 3.3V DSP cores and 5V line interface units in modular telecom cards. IC Role / Device Role / Timing Role: Low-latency, direction-flexible bus transceiver supporting hot-swap maintenance. Use Value: Meets sub-10ns timing budget for real-time diagnostics while surviving repeated insertion cycles. | Use Scenario: Routing test vectors between 3.3V pattern generators and 5V DUTs in semiconductor ATE fixtures. IC Role / Device Role / Timing Role: Programmable signal path selector with precise 3-state timing control (tPZH ≤ 8.5ns). Use Value: Guarantees clean signal edges and eliminates cross-talk during vector switching. |
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 core, ±24mA drive, but TI package is TSSOP-20 (PW); no industrial temp grade by default | Requires derating or external qualification for –40°C to +85°C use | Preferred for cost-sensitive consumer designs where ambient stays <70°C |
| 74LVC245AD,218 | NXP variant in SOIC-20; identical electrical specs but different ESD rating (IEC 61000-4-2 Level 3 vs IDT's MIL-STD-883 Class 2) | Suitable for CE-marked equipment with defined ESD test requirements | Chosen when compliance documentation traceability to NXP's qualification reports is mandatory |
Compared with SN74LVC245APWR and 74LVC245AD,218, the IDT74LVC245AQG provides guaranteed industrial temperature operation and higher ESD robustness per MIL-STD-883, making it optimal for uncontrolled environments where thermal cycling and handling stress are routine.
Availability
IDT74LVC245AQG is available at Aetrix Electronics and suitable for industrial PLC backplanes, telecom line cards, and automated test equipment requiring stable component supply across extended temperature and long production lifecycles.
Supply support for IDT74LVC245AQG 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.
The IDT74LVC245AQG belongs to IDT's LVC logic family, engineered for robust voltage translation and noise-immune bus interfacing in industrial and communications infrastructure.
FAQ
What is the maximum operating voltage on the I/O pins of the IDT74LVC245AQG?
The IDT74LVC245AQG supports up to +6.5V on all I/O pins (A1–A8, B1–B8) regardless of VCC level, enabling safe interfacing with 5V systems while powered from 3.3V. This 5V tolerance is specified under absolute maximum ratings and validated across the full industrial temperature range. The IDT74LVC245AQG does not require external clamping or series resistors when connected to 5V sources.
Does the IDT74LVC245AQG support hot insertion?
Yes, the IDT74LVC245AQG supports hot insertion due to its 5V-tolerant I/O structure, controlled power-up sequencing, and ability to maintain high-impedance states during VCC ramp. Its inputs remain inactive until VCC reaches valid logic thresholds, preventing bus contention. This behavior is verified per manufacturer application notes and used in field-deployed telecom line cards where the IDT74LVC245AQG interfaces with live backplanes.
What is the function of the DIR pin on the IDT74LVC245AQG?
The DIR (Direction Control) pin on the IDT74LVC245AQG determines data flow direction: DIR = HIGH enables A→B transfer, DIR = LOW enables B→A transfer. However, this control is overridden by the active-low OE pin - when OE = HIGH, both A and B ports enter high-impedance regardless of DIR state. The IDT74LVC245AQG uses DIR in conjunction with OE to implement flexible, software-controllable bus arbitration in microcontroller systems.
Can the IDT74LVC245AQG operate at 2.5V VCC?
No, the IDT74LVC245AQG is not characterized or guaranteed for 2.5V operation. Its specified VCC range is 2.7V to 3.6V, with DC and AC parameters validated only within that window. At 2.5V, VIH/VIL thresholds and output drive strength fall outside specification, risking setup/hold violations or reduced noise margins. For 2.5V systems, consider the IDT74LVC245A's sibling family members explicitly rated down to 2.3V, not the IDT74LVC245AQG.
What package type does the QG suffix indicate for the IDT74LVC245AQG?
For the IDT74LVC245AQG, the QG suffix denotes a 20-pin Small Outline IC (SOIC) package with gull-wing leads and green (halogen-free/RoHS-compliant) molding compound. It conforms to JEDEC MS-013AC mechanical dimensions and is compatible with standard SOIC-20 footprints and reflow profiles. The IDT74LVC245AQG's QG package is widely used in industrial PCBs where legacy through-hole or SOIC-compatible layouts are maintained.
IDT74LVC245AQG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 74LVC
- Package/Case:
- 20-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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-QSOP
IDT74LVC245AQG FAQ
1.How can I place an order for IDT74LVC245AQG through Aetrix?
Please submit a Request for Quotation (RFQ) for IDT74LVC245AQG 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 IDT74LVC245AQG reliable?
The price and inventory of IDT74LVC245AQG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IDT74LVC245AQG is usually 5 days.
3.What payment methods are accepted for IDT74LVC245AQG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IDT74LVC245AQG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IDT74LVC245AQG?
IDT74LVC245AQG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IDT74LVC245AQG 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 IDT74LVC245AQG?
For technical support, including IDT74LVC245AQG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IDT74LVC245AQG requirements.
6.How does Aetrix verify that IDT74LVC245AQG is sourced from the original manufacturer or authorized distributors?
All IDT74LVC245AQG 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 IDT74LVC245AQG meets industry standards.
7.What is the process for return or replacement of IDT74LVC245AQG?
All IDT74LVC245AQG units undergo pre-shipment inspection (PSI). If there is an issue with IDT74LVC245AQG, 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 IDT74LVC245AQG part is unused and in its original packaging.
Return procedure for IDT74LVC245AQG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
IDT74LVC245AQG Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
