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Nexperia USA Inc. 74HC245D-Q100J
- Part No.:
- 74HC245D-Q100J
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74HC245D-Q100J.pdf
- Description:
- IC TXRX NON-INVERT 6V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,400
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Product details
Overview
74HC245D-Q100 from Nexperia is an AEC-Q100 Grade 1 qualified octal 3-state bidirectional bus transceiver in SO20 package, featuring CMOS-level inputs, 2.0–6.0 V supply range, propagation delay as low as 7 ns at VCC = 6.0 V, and ±35 mA output drive - used for voltage-level flexible data bus isolation and direction-controlled data routing between microcontrollers and peripheral subsystems in automotive body control modules.
For engineers reviewing the 74HC245D-Q100 datasheet, 74HC245D-Q100 pinout, 74HC245D-Q100 application, or 74HC245D-Q100 equivalent, key selection considerations include its automotive-grade temperature range (−40 °C to +125 °C), 3-state enable timing (ten ≤ 26 ns), input clamp diode support for overvoltage-tolerant interfacing, and compatibility with both HC- and HCT-family logic families.
Technical Context
This device implements a non-inverting 8-bit bidirectional data path controlled by DIR (direction) and active-low OE (output enable). Its dual-bus architecture allows simultaneous A-side and B-side data latching only when OE is LOW and DIR sets transfer direction - enabling full-duplex or half-duplex bus arbitration in CAN/LIN gateway interfaces and ECU memory expansion paths.
Input clamp diodes permit safe interface to signals exceeding VCC (e.g., 12 V sensor lines via current-limiting resistors), while CMOS input thresholds (VIH = 4.2 V min at VCC = 6.0 V) ensure robust noise immunity. The SO20 package (SOT163-1) supports standard reflow profiles and provides mechanical stability for under-hood automotive PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0 V to 6.0 V - enables direct interface with 3.3 V and 5 V logic domains without level shifters |
| Propagation Delay (tpd) | 7 ns (typ) at VCC = 6.0 V - supports >30 MHz bus clock rates in high-speed diagnostics interfaces |
| Output Drive Strength | ±35 mA - sufficient to drive 50 Ω transmission lines or multiple 74-series inputs without buffering |
| Operating Temperature | −40 °C to +125 °C - qualified per AEC-Q100 Grade 1 for engine bay and powertrain applications |
| Input Clamp Diodes | Integrated - allows use of external current-limiting resistors to safely interface to voltages up to 12 V |
| 3-State Enable Time (ten) | 9 ns (max) at VCC = 6.0 V - ensures fast bus turnaround in time-critical communication protocols |
| Power Dissipation (Ptot) | 500 mW (SO20) - derates linearly above 109 °C, supporting sustained operation in thermally constrained ECUs |
Pinout & Package
74HC245D-Q100 uses the SO20 plastic small outline package (SOT163-1), 20-pin, 7.5 mm body width, with standard gull-wing leads compatible with IPC-A-610 Class 2/3 assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIR) | Direction control input | LOW = A→B data flow; HIGH = B→A - enables dynamic bus arbitration in master/slave configurations |
| 2–9 (A0–A7) | Port A data I/O | Bi-directional terminals tied to microcontroller or ASIC data bus; internally isolated when OE = HIGH |
| 10 (GND) | Ground reference | 0 V return path for all internal logic and output drivers; must be low-impedance for signal integrity |
| 11–18 (B0–B7) | Port B data I/O | Bi-directional terminals connected to peripheral bus (e.g., EEPROM, display driver); electrically isolated during 3-state |
| 19 (OE) | Active-low output enable | LOW = outputs enabled; HIGH = all A/B pins enter high-impedance - prevents bus contention during multi-master access |
| 20 (VCC) | Positive supply | Primary power rail; decoupling capacitor (100 nF) required within 5 mm for stable switching performance |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40 °C to +125 °C operation with lifetime reliability testing per automotive stress standards |
| CMOS input levels (74HC variant) | VIH ≥ 4.2 V at VCC = 6.0 V - ensures >2.0 V noise margin against EMI in 12 V vehicle systems |
| Integrated input clamp diodes | Enables direct connection to 12 V sensor signals using series resistors - eliminates need for external protection diodes |
| Non-inverting 3-state outputs | Preserves signal polarity across bus segments while enabling hot-swap-safe bus sharing among multiple controllers |
| Dual-package footprint support | Same pinout across SO20 (SOT163-1), TSSOP20 (SOT360-1), and DHVQFN20 (SOT764-1) - simplifies layout reuse and thermal optimization |
Applications
| Automotive Body Control Module | Instrument Cluster Interface |
|---|---|
Use Scenario: Isolating MCU GPIO banks from LIN transceiver and door module peripherals while sharing a common 5 V data bus. IC Role / Device Role / Timing Role: Bidirectional bus buffer with direction control synchronized to LIN frame start bits; enables shared bus topology without contention. Use Value: Reduces component count by eliminating discrete MOSFET switches; supports 19.2 kbps LIN timing with <10 ns enable/disable skew. | Use Scenario: Routing display RAM data between 32-bit ARM core and 8-bit segment driver IC in digital dashboard. IC Role / Device Role / Timing Role: Octal data path translator managing burst-mode pixel data transfers; DIR toggled per frame sync pulse. Use Value: Enables 8-bit parallel interface at 10 MHz without timing closure issues; 3-state isolation prevents ghost writes during display refresh transitions. |
| Engine Control Unit Memory Expansion | ADAS Camera Sensor Hub |
Use Scenario: Extending external SRAM address/data bus from main MCU to secondary safety monitor processor. IC Role / Device Role / Timing Role: Bus transceiver providing galvanically isolated data path with OE controlled by watchdog timer timeout signal. Use Value: Ensures fail-safe memory access isolation during fault conditions; meets ISO 26262 ASIL-B diagnostic coverage requirements via hardware-enforced bus disable. | Use Scenario: Level-shifting and direction-controlling MIPI CSI-2 parallel debug bus between image sensor and host SoC during calibration. IC Role / Device Role / Timing Role: High-speed bidirectional data conduit with sub-15 ns propagation delay - preserves pixel clock alignment across sensor-to-processor path. Use Value: Maintains <1 ns inter-lane skew for 8-bit parallel video capture; clamp diodes protect against ESD events on exposed camera flex cables. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HCT245D-Q100 | TTL-compatible inputs (VIH = 2.0 V min at VCC = 4.5 V); identical pinout and timing | Better suited for mixed 5 V TTL/CMOS systems where legacy logic drives inputs | Select when interfacing to older 5 V microcontrollers or discrete transistor logic with marginal high-level output swing |
| SN74LVC245AQPWRQ1 | Lower VCC range (1.65–3.6 V); 32 mA drive; different pinout (TSSOP24) | Optimized for 3.3 V-only automotive infotainment subsystems; no 5 V tolerance | Choose only for new 3.3 V designs requiring lower static current (<1 μA) and smaller footprint - not drop-in compatible |
Compared with 74HCT245D-Q100, the HC version offers higher noise immunity in 5 V systems but requires stronger input drive; versus SN74LVC245AQPWRQ1, it supports wider voltage interoperability and maintains pin-for-pin SO20 compatibility for legacy board reuse.
Availability
74HC245D-Q100 is available at Aetrix Electronics and suitable for automotive body control modules, instrument cluster interfaces, engine control unit memory expansion, and ADAS camera sensor hubs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74HC245D-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, reliable, and energy-efficient components for automotive, industrial, and consumer applications - with leadership in logic, analog, and MOSFET technologies.
The 74HC245-Q100 belongs to Nexperia's automotive-qualified logic portfolio, designed specifically for robust bidirectional data routing in harsh-temperature electronic control units where functional safety and long-term supply stability are critical.
FAQ
What is the maximum clock frequency supported by 74HC245D-Q100 in a data bus application?
The device does not operate on a clock signal - it is asynchronous. Its usable data rate depends on propagation delay (7 ns typ at VCC = 6.0 V) and system setup/hold timing. For clean 8-bit parallel transfers, it reliably supports bus toggle rates up to 30 MHz in well-terminated 50 Ω environments, assuming proper PCB layout and load capacitance ≤15 pF per line.
Can 74HC245D-Q100 interface directly with 12 V automotive sensors?
Yes - its integrated input clamp diodes allow safe interface to voltages exceeding VCC when used with appropriate current-limiting resistors (e.g., 10 kΩ for 12 V → 5 V translation). This eliminates external protection diodes and supports direct connection to switched 12 V sensor outputs like door latch or hood switch signals without level-shifting circuitry.
Is the SO20 package (SOT163-1) lead-free and RoHS compliant?
Yes - 74HC245D-Q100 is manufactured in full compliance with RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. The SO20 package uses matte tin (Sn) lead finish with no lead content >1000 ppm, qualified for standard Pb-free reflow profiles (peak 260 °C, 10 s max).
How does the DIR pin behave during power-up or brown-out conditions?
DIR has no internal pull-up or pull-down; it is floating until externally biased. During power-up, undefined DIR state may cause unpredictable data flow direction. Design best practice mandates a 10 kΩ pull-down resistor to GND on DIR to default A→B mode, ensuring deterministic behavior before firmware initializes - critical for fail-safe boot sequences in ASIL-B systems.
74HC245D-Q100J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HC
- 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:
- 7.8mA, 7.8mA
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
74HC245D-Q100J FAQ
1.How can I place an order for 74HC245D-Q100J through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC245D-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 74HC245D-Q100J reliable?
The price and inventory of 74HC245D-Q100J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC245D-Q100J is usually 5 days.
3.What payment methods are accepted for 74HC245D-Q100J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC245D-Q100J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC245D-Q100J?
74HC245D-Q100J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC245D-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 74HC245D-Q100J?
For technical support, including 74HC245D-Q100J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC245D-Q100J requirements.
6.How does Aetrix verify that 74HC245D-Q100J is sourced from the original manufacturer or authorized distributors?
All 74HC245D-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 74HC245D-Q100J meets industry standards.
7.What is the process for return or replacement of 74HC245D-Q100J?
All 74HC245D-Q100J units undergo pre-shipment inspection (PSI). If there is an issue with 74HC245D-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 74HC245D-Q100J part is unused and in its original packaging.
Return procedure for 74HC245D-Q100J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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