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Nexperia USA Inc. 74HCT245D-Q100J
- Part No.:
- 74HCT245D-Q100J
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74HCT245D-Q100J.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,885
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Product details
Overview
74HCT245D-Q100 from Nexperia is an automotive-grade octal bidirectional 3-state bus transceiver in SO20 (SOT163-1) package, featuring TTL-compatible inputs, direction control (DIR), active-low output enable (OE), and operation from -40 °C to +125 °C at 4.5–5.5 V supply. It enables data flow between two 8-bit buses in microcontroller-based body control modules, infotainment interconnects, and ADAS sensor interface subsystems.
For engineers reviewing the 74HCT245D-Q100 datasheet, 74HCT245D-Q100 pinout, 74HCT245D-Q100 application, or 74HCT245D-Q100 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification, 12 ns typical propagation delay at 5 V, ±6 mA drive strength, 3.5 pF input capacitance, and SO20 thermal profile for under-hood ECU designs.
Technical Context
The device implements non-inverting bidirectional data transfer between two 8-bit parallel buses using a single DIR signal to select direction (A→B or B→A) and an active-low OE to place all outputs in high-impedance state. Its TTL-level input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5 V) ensure compatibility with legacy 5 V logic families.
Internal clamp diodes on all inputs allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors. The SO20 package (SOT163-1) provides 7.5 mm body width, 1.27 mm lead pitch, and 109 °C thermal derating threshold with 12.3 mW/K power dissipation slope above that temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures stable operation across automotive battery voltage fluctuations including cold-crank conditions. |
| Propagation Delay | 12 ns typical (An↔Bn, VCC = 5 V, CL = 15 pF) - Supports 40+ MHz bus clock rates in CAN/LIN gateway interfaces. |
| Output Drive | ±6 mA at VOH/VOL - Sufficient to drive 10 LS-TTL loads or terminate short PCB traces without external buffers. |
| Input Capacitance | 3.5 pF - Minimizes capacitive loading on upstream drivers, preserving signal integrity in high-speed routing. |
| Operating Temperature | -40 °C to +125 °C - Qualified for engine bay, transmission control, and front-end radar module environments. |
| AEC-Q100 Grade | Grade 1 - Meets automotive reliability requirements for mission-critical electronic systems per ISO/TS 16949. |
| ESD Protection | HBM > 2000 V, CDM > 1000 V - Reduces risk of field failure during handling and assembly in Tier 1 production lines. |
Pinout & Package
74HCT245D-Q100 uses the SO20 plastic small outline package (SOT163-1), 20-pin, 7.5 mm body width, 1.27 mm pitch, with gull-wing leads and standard pin 1 index marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | DIR | Direction control input: HIGH enables B→A data flow; LOW enables A→B flow. |
| 2–9 | A0–A7 | Port A bidirectional data terminals - connect to microcontroller or ASIC data bus side A. |
| 10 | GND | Ground reference (0 V) - must be low-inductance connection to minimize switching noise coupling. |
| 11–18 | B0–B7 | Port B bidirectional data terminals - connect to peripheral bus, memory, or sensor interface side B. |
| 19 | OE | Active-low output enable: LOW enables transceiver; HIGH forces all A/B pins into high-Z state. |
| 20 | VCC | Positive supply input (4.5–5.5 V) - requires local 100 nF ceramic decoupling adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | VIH = 2.0 V min, VIL = 0.8 V max at 5 V - Enables direct interface with legacy 5 V MCU GPIOs without level shifters. |
| Clamp diode protection | Integrated input clamping diodes - permits safe overvoltage tolerance up to ±20 mA with external series resistors. |
| Low dynamic power | CPD = 30 pF - Limits switching power to <1.5 mW at 10 MHz with 15 pF load, reducing thermal load in dense ECUs. |
| High noise immunity | Typical 400 mV noise margin at 5 V - Maintains robust operation in electrically noisy vehicle cabins and powertrain zones. |
| Automotive qualification | AEC-Q100 Grade 1, -40 °C to +125 °C - Validated for 15-year service life in safety-relevant body electronics applications. |
Applications
| Body Control Module (BCM) | Infotainment Gateway |
|---|---|
|
Use Scenario: Isolating and translating data between 5 V microcontroller UART/SPI peripherals and 3.3 V display/audio ICs in dashboard clusters. IC Role / Device Role: Bidirectional level-shifting bus transceiver managing shared I²C or parallel control bus between domains. Use Value: Eliminates need for discrete level translators while maintaining AEC-Q100 compliance and 12 ns timing margin for real-time display updates. |
Use Scenario: Buffering and isolating CAN/LIN message routing logic between head unit MCU and telematics modem in connected car platforms. IC Role / Device Role: 3-state-enabled bus isolation device preventing contention during firmware update or diagnostic mode transitions. Use Value: Enables hot-swap capability of communication modules without disrupting main processor bus activity or causing latch-up. |
| Radar Sensor Interface | ADAS Camera Link |
|
Use Scenario: Interfacing 5 V FPGA configuration logic with 3.3 V radar MMIC SPI control lines in front-end radar ECU designs. IC Role / Device Role: Direction-controlled data bridge synchronizing FPGA register writes and MMIC status reads over shared serial bus. Use Value: Provides deterministic 12 ns latency and ±6 mA drive to meet strict timing budgets for millimeter-wave radar calibration sequences. |
Use Scenario: Supporting dual-camera synchronization signals (HSYNC/VSYNC/PIXCLK) between image sensor array and SoC video processor in surround-view systems. IC Role / Device Role: High-impedance bus isolator enabling dynamic reconfiguration of camera data paths without signal reflection or crosstalk. Use Value: Delivers 3.5 pF input capacitance and 100 MHz bandwidth to preserve edge integrity of 72 MHz pixel clocks across 8-layer PCB backplanes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HCT245PW-Q100 | TSSOP20 (SOT360-1) package, 4.4 mm body width, 0.65 mm pitch - lower profile, higher thermal resistance (10.0 mW/K derating). | Better suited for space-constrained infotainment modules where board area is critical but thermal margin is adequate. | Select when footprint reduction outweighs need for SO20's mechanical robustness and solder joint inspection capability. |
| 74LVC245APW-Q100 | 3.3 V-only operation (1.65–3.6 V), LVCMOS inputs, 3.5 ns propagation delay, 24 mA drive - not TTL-compatible. | Targeted at modern 3.3 V automotive SoCs; incompatible with 5 V MCU interfaces without additional level translation. | Choose only for new 3.3 V domain designs requiring higher speed and lower power; not a drop-in replacement for 74HCT245D-Q100. |
Compared with 74HCT245PW-Q100, the D-package offers superior mechanical stability and AOI-friendly gull-wing leads for high-reliability under-hood use; versus 74LVC245APW-Q100, it retains essential 5 V TTL interoperability at the cost of slightly higher propagation delay and static current.
Availability
74HCT245D-Q100 is available at Aetrix Electronics and suitable for automotive body control modules, infotainment gateways, and radar sensor interfaces requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 74HCT245D-Q100 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
Nexperia is a global semiconductor expert delivering high-performance logic, analog, and MOSFET solutions optimized for automotive, industrial, and mobile markets, with manufacturing rooted in process excellence and AEC-Q100 leadership.
This device belongs to Nexperia's automotive-qualified HC/HCT logic family, engineered specifically for robust bidirectional bus interfacing in harsh-temperature vehicle subsystems where reliability and signal fidelity are non-negotiable.
FAQ
What is the maximum allowable supply voltage for continuous operation?
The absolute maximum supply voltage is +7.0 V, but recommended continuous operation is limited to 4.5–5.5 V per AEC-Q100 Grade 1 specifications. Exceeding 5.5 V risks violating input/output voltage limits and may trigger latch-up under transient conditions, especially at elevated temperatures.
Can 74HCT245D-Q100 interface directly with 3.3 V logic devices?
No - its TTL-compatible inputs require ≥2.0 V for HIGH recognition, and outputs swing rail-to-rail (0–5.5 V), making direct connection to 3.3 V-only receivers unsafe without series resistors or level-shifting circuitry. For mixed-voltage systems, external termination or dedicated translators are required.
How does the DIR pin behave during power-up sequencing?
DIR has no internal pull-up/down; it must be actively driven to a defined logic level before VCC stabilizes. Leaving DIR floating during power-up may cause undefined bus direction and transient contention. A 10 kΩ pull-down resistor to GND ensures default A→B flow and prevents metastability.
Is the SO20 package compatible with lead-free reflow profiles?
Yes - the SOT163-1 package is qualified for standard JEDEC J-STD-020D lead-free reflow, with peak temperature up to 260 °C for 30 seconds. Its gull-wing leads support automated optical inspection (AOI) of solder fillets, ensuring process control in automotive manufacturing lines.
74HCT245D-Q100J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 6mA, 6mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
74HCT245D-Q100J FAQ
1.How can I place an order for 74HCT245D-Q100J through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT245D-Q100J 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 74HCT245D-Q100J reliable?
The price and inventory of 74HCT245D-Q100J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT245D-Q100J is usually 5 days.
3.What payment methods are accepted for 74HCT245D-Q100J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT245D-Q100J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT245D-Q100J?
74HCT245D-Q100J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT245D-Q100J 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 74HCT245D-Q100J?
For technical support, including 74HCT245D-Q100J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT245D-Q100J requirements.
6.How does Aetrix verify that 74HCT245D-Q100J is sourced from the original manufacturer or authorized distributors?
All 74HCT245D-Q100J 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 74HCT245D-Q100J meets industry standards.
7.What is the process for return or replacement of 74HCT245D-Q100J?
All 74HCT245D-Q100J units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT245D-Q100J, 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 74HCT245D-Q100J part is unused and in its original packaging.
Return procedure for 74HCT245D-Q100J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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