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Nexperia USA Inc. 74AHCT240D-Q100J
- Part No.:
- 74AHCT240D-Q100J
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74AHCT240D-Q100J.pdf
- Description:
- IC BUFFER INVERT 5.5V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,731
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Product details
Overview
74AHCT240D-Q100 from Nexperia is an automotive-qualified octal inverting buffer/line driver with 3-state outputs, dual independent output-enable inputs (1OE, 2OE), Schmitt-trigger inputs, and overvoltage-tolerant inputs up to 5.5 V. It operates from 4.5 V to 5.5 V across –40 °C to +125 °C and is used in CAN/LIN bus interface signal conditioning, ECU I/O expansion, and automotive infotainment data routing.
For engineers reviewing the 74AHCT240D-Q100 datasheet, 74AHCT240D-Q100 pinout, 74AHCT240D-Q100 application, or 74AHCT240D-Q100 equivalent, key selection criteria include AEC-Q100 Grade 1 qualification, 3.70 V minimum VOH at 8 mA load, 8.5 ns max propagation delay (CL = 15 pF), and SO20 package compatibility with legacy PCB footprints.
Technical Context
This device implements two independent 4-bit inverting buffer sections, each controlled by its own active-low output enable (1OE for Y0–Y3, 2OE for Y0'–Y3'). Inputs feature Schmitt-trigger action for noise immunity on slow-rising signals, and tolerate voltages up to 5.5 V regardless of VCC level-enabling level translation between 3.3 V and 5 V domains.
Logic operation follows standard TTL-compatible thresholds: VIH ≥ 2.0 V, VIL ≤ 0.8 V at VCC = 4.5–5.5 V. Output drive strength is ±8 mA (VOH/VOL specified at that load), with high-impedance OFF-state leakage limited to ±10.0 μA over full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - Ensures stable operation under automotive battery transients (e.g., load dump, cold crank). |
| Propagation Delay | 8.5 ns max (CL = 15 pF) - Supports reliable timing in 100+ MHz digital control loops with margin. |
| VOH / VOL | ≥3.70 V / ≤0.55 V at IO = ±8 mA - Guarantees robust logic HIGH/LOW margins driving multiple CMOS loads. |
| Input Voltage Tolerance | Up to 5.5 V - Allows direct interfacing with 5 V microcontrollers without external level shifters. |
| Ambient Temp Range | –40 °C to +125 °C - Qualified for engine bay and powertrain control unit environments. |
| ESD Protection | HBM >2000 V, CDM >1000 V - Meets stringent automotive board-level ESD immunity requirements. |
| Output Enable Propagation | 14.4 ns max disable time (CL = 50 pF) - Enables precise bus arbitration timing in shared-data systems. |
Pinout & Package
74AHCT240D-Q100 uses the SO20 (SOT163-1) package: plastic small outline, 20 leads, 7.5 mm body width, 1.27 mm lead pitch. Pin 1 index located at top-left corner with notch marking.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low enables for Group 1 (Y0–Y3) and Group 2 (Y0'–Y3') outputs - permits independent bus segment control. |
| 2, 4, 6, 8 | 1A0–1A3 | Inverting input group for first 4-bit section - accepts TTL/CMOS logic and tolerates 5.5 V inputs. |
| 17, 15, 13, 11 | 2A0–2A3 | Inverting input group for second 4-bit section - electrically isolated from Group 1 for dual-bus isolation. |
| 18, 16, 14, 12 | 1Y0–1Y3 | Inverted, 3-state outputs for Group 1 - driven LOW when corresponding 1An is HIGH, high-Z when 1OE = HIGH. |
| 3, 5, 7, 9 | 2Y0–2Y3 | Inverted, 3-state outputs for Group 2 - identical behavior to Group 1 but controlled by 2OE and 2An inputs. |
| 10 | GND | Ground reference for all logic and power paths - requires low-inductance PCB connection for noise immunity. |
| 20 | VCC | 5 V supply input - decoupling capacitor (100 nF) required within 5 mm for stable switching performance. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive use from –40 °C to +125 °C ambient, including thermal cycling and humidity testing. |
| Schmitt-trigger inputs | Provides hysteresis (typ. 0.5 V) to reject noise on slow or noisy control lines like wake-up signals. |
| Overvoltage-tolerant inputs | Accepts 0–5.5 V regardless of VCC - eliminates need for external level translators in mixed-voltage ECUs. |
| Dual independent 3-state controls | Enables time-multiplexed sharing of a single data bus between two subsystems (e.g., sensor hub and display controller). |
| SO20 footprint compatibility | Mechanically and electrically compatible with legacy 74-series SO20 packages - supports drop-in replacement in existing designs. |
Applications
| ECU I/O Expansion | CAN/LIN Bus Interface |
|---|---|
|
Use Scenario: Expanding GPIO count on an automotive engine control unit using a microcontroller with limited native I/O. IC Role / Device Role / Timing Role: Inverting 3-state buffer providing additional bidirectional data lanes with independent enable control per group. Use Value: Enables connection of 8 extra sensors/actuators while maintaining signal integrity and bus contention prevention via OE-controlled high-Z states. |
Use Scenario: Level-shifting and buffering between a 3.3 V CAN controller and 5 V transceiver or LIN physical layer. IC Role / Device Role / Timing Role: Voltage-tolerant inverting buffer translating logic levels and driving bus capacitance without timing skew. Use Value: Eliminates discrete level-shifters; Schmitt-trigger inputs suppress bus noise; 8.5 ns delay ensures timing compliance with ISO 11898-2 sampling windows. |
| Infotainment Data Routing | Instrument Cluster Display Driver |
|
Use Scenario: Isolating and routing parallel video or audio data between SoC and display/audio codec in a head unit. IC Role / Device Role / Timing Role: Dual-group 3-state inverter managing data direction and enabling/disabling signal paths on shared buses. Use Value: Prevents bus contention during mode transitions; balanced propagation delays (<0.5 ns skew) preserve data eye integrity across all 8 bits. |
Use Scenario: Driving multiplexed LED segments or LCD backplane signals in a vehicle instrument cluster. IC Role / Device Role / Timing Role: High-current inverting buffer delivering 8 mA per output to sink LED current or charge display capacitors. Use Value: Sustains consistent brightness across segments; 0.55 V VOL at 8 mA ensures minimal voltage drop even with long PCB traces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal inverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74AHCT240PW-Q100 | TSSOP20 package (4.4 mm width); 10.0 mW/K thermal derating above 100 °C | Better PCB space efficiency; lower thermal mass but reduced heat dissipation vs SO20 | Select for compact layouts where reflow profile allows fine-pitch handling and thermal margin is sufficient. |
| 74LVC240APW-Q100 | Lower VCC range (1.65–3.6 V); non-inverting logic; 3.3 V only operation | Not suitable for 5 V systems; lacks overvoltage tolerance and Schmitt-trigger inputs | Choose only for pure 3.3 V domains requiring lower power; not a functional substitute in mixed-voltage automotive designs. |
Compared with 74AHCT240PW-Q100, the D-package offers superior thermal robustness and legacy footprint compatibility; versus 74LVC240APW-Q100, it provides essential 5 V interoperability, noise immunity, and automotive-grade voltage margin - making it the sole fit for 5 V ECU signal conditioning.
Availability
74AHCT240D-Q100 is available at Aetrix Electronics and suitable for automotive ECU design, CAN/LIN interface development, and instrument cluster production requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 74AHCT240D-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 focused on high-volume, high-reliability logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.
The 74AHCT-Q100 series delivers AEC-Q100 qualified, pin-compatible upgrades to legacy 74-series logic - designed specifically for automotive signal integrity, noise immunity, and extended-temperature reliability.
FAQ
Is 74AHCT240D-Q100 compatible with 3.3 V input signals while operating at 5 V VCC?
Yes. Its inputs accept voltages up to 5.5 V regardless of VCC level, and VIH/VIL thresholds (2.0 V/0.8 V) are fully compatible with 3.3 V logic driving into a 5 V system. This enables seamless level translation without external components.
What is the maximum output current per pin, and how does it affect fan-out capability?
The device drives ±8 mA per output at VOH ≥ 3.70 V and VOL ≤ 0.55 V over –40 °C to +125 °C. At these conditions, it can reliably drive up to 10 standard 74AHCT inputs (each drawing ~1 μA) or 2–3 heavier loads like optocouplers or LEDs with appropriate current limiting.
Does the SO20 package support automated optical inspection (AOI) of solder joints?
No - only the DHVQFN20 (BQ) variant features side-wettable flanks for AOI. The SO20 (D) package uses gull-wing leads; solder joint inspection requires X-ray or electrical continuity testing, not optical methods.
Can both output-enable inputs be tied together for single-control operation?
Yes. Connecting 1OE and 2OE simplifies control logic and enables simultaneous 8-bit 3-state operation. However, this forfeits independent bus segmentation - use separate enables only when isolating two distinct data paths is required.
74AHCT240D-Q100J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74AHCT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Buffer, Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 4
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 8mA, 8mA
- 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
74AHCT240D-Q100J FAQ
1.How can I place an order for 74AHCT240D-Q100J through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHCT240D-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 74AHCT240D-Q100J reliable?
The price and inventory of 74AHCT240D-Q100J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHCT240D-Q100J is usually 5 days.
3.What payment methods are accepted for 74AHCT240D-Q100J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHCT240D-Q100J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AHCT240D-Q100J?
74AHCT240D-Q100J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHCT240D-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 74AHCT240D-Q100J?
For technical support, including 74AHCT240D-Q100J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHCT240D-Q100J requirements.
6.How does Aetrix verify that 74AHCT240D-Q100J is sourced from the original manufacturer or authorized distributors?
All 74AHCT240D-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 74AHCT240D-Q100J meets industry standards.
7.What is the process for return or replacement of 74AHCT240D-Q100J?
All 74AHCT240D-Q100J units undergo pre-shipment inspection (PSI). If there is an issue with 74AHCT240D-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 74AHCT240D-Q100J part is unused and in its original packaging.
Return procedure for 74AHCT240D-Q100J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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