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Nexperia USA Inc. 74AHCT240PW-Q100J
- Part No.:
- 74AHCT240PW-Q100J
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74AHCT240PW-Q100J.pdf
- Description:
- IC BUFFER INVERT 5.5V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,800
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Product details
Overview
74AHCT240PW-Q100 from Nexperia is an automotive-grade octal inverting buffer/line driver with 3-state outputs, dual independent output enables (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 qualified to AEC-Q100 Grade 1 for under-hood control modules.
For engineers reviewing the 74AHCT240PW-Q100 datasheet, 74AHCT240PW-Q100 pinout, 74AHCT240PW-Q100 application, or 74AHCT240PW-Q100 equivalent, this device serves as a voltage-level translating bus buffer in CAN/LIN subsystems, ECU I/O expansion, and automotive sensor interface logic where TTL-compatible input thresholds and high-impedance isolation are required.
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). Each section drives four inverted outputs with 8 mA sink/source capability at VCC = 4.5 V.
Inputs feature Schmitt-trigger action for noise immunity and tolerate voltages up to 5.5 V regardless of VCC - enabling use as level translators between 3.3 V controllers and 5 V buses. Propagation delay is 5.8 ns typical (CL = 15 pF, VCC = 5 V), with enable/disable times under 9.5 ns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - supports stable operation across automotive battery variation (e.g., cold-crank to load-dump). |
| Operating Temp | −40 °C to +125 °C - qualified for engine compartment and transmission control unit environments. |
| tpd (typ) | 5.8 ns @ CL = 15 pF - ensures timing compliance in 25 MHz bus interfaces with margin. |
| IOH / IOL | −8.0 mA / +8.0 mA - sufficient drive strength for 50 Ω terminated lines or fan-out to 10+ CMOS loads. |
| VIH / VIL | 2.0 V / 0.8 V - TTL-compatible input thresholds allow direct interfacing with legacy microcontrollers. |
| Input Overvoltage | Up to 5.5 V - enables safe connection to 5 V buses while powered from 3.3 V logic rails. |
| ESD HBM | >2000 V - meets automotive system-level ESD robustness requirements per ISO 10605. |
Pinout & Package
TSSOP20 package (SOT360-1): 20-pin thin shrink small outline, 4.4 mm body width, 0.65 mm pitch, lead-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output enables - independently disable Group 1 (Y0–Y3) or Group 2 (Y0–Y3) to isolate bus segments. |
| 2, 4, 6, 8 | 1A0–1A3 | Inverting input group 1 - drives corresponding Y outputs with polarity inversion and Schmitt-trigger hysteresis. |
| 11, 13, 15, 17 | 2A0–2A3 | Inverting input group 2 - electrically isolated from Group 1; allows dual-bus buffering on single IC. |
| 12, 14, 16, 18 | 1Y0–1Y3 | Inverted outputs for Group 1 - high-impedance when 1OE = HIGH; driven LOW/HIGH when enabled. |
| 3, 5, 7, 9 | 2Y0–2Y3 | Inverted outputs for Group 2 - identical behavior to 1Yx but controlled by 2OE; supports redundant or split-bus routing. |
| 10 | GND | Ground reference - decoupling capacitor must be placed adjacent to Pin 10 for noise suppression. |
| 20 | VCC | Power supply - requires local 100 nF ceramic bypass cap between Pin 20 and Pin 10. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for continuous operation at +125 °C ambient - eliminates derating concerns in powertrain ECUs. |
| Schmitt-trigger inputs | Hysteresis ≥0.3 V - rejects noise spikes on long harness runs without external RC filtering. |
| Overvoltage-tolerant inputs | Accepts 0–5.5 V regardless of VCC - enables direct interfacing with 5 V sensors while powered from 3.3 V domain. |
| Dual independent 3-state controls | 1OE and 2OE allow selective bus arbitration - critical for multi-master LIN/CAN transceiver coexistence. |
| TSSOP20 with side-wettable flanks | Enables automated optical inspection (AOI) of solder joints - improves manufacturing yield in automotive SMT lines. |
Applications
| Engine Control Unit (ECU) I/O Expansion | LIN Bus Transceiver Interface |
|---|---|
|
Use Scenario: Expanding GPIO count of an 8-bit MCU to drive solenoid drivers and read analog sensor status via discrete logic. IC Role / Device Role / Timing Role: Inverting buffer isolates MCU pins from noisy 12 V actuator returns and provides level translation between 3.3 V MCU and 5 V sensor logic. Use Value: Dual OE pins allow time-multiplexed access to two independent peripheral groups, reducing PCB routing congestion. |
Use Scenario: Interfacing a LIN master controller to multiple slave nodes with shared bus pull-up and fault detection lines. IC Role / Device Role / Timing Role: 3-state inverting buffer conditions LIN TX/RX signals and enables/disables node participation during diagnostic sessions. Use Value: Schmitt-trigger inputs reject electromagnetic interference from ignition systems, ensuring reliable frame synchronization. |
| Body Control Module (BCM) Door Lock Interface | Automotive Instrument Cluster Backlight Control |
|
Use Scenario: Driving four door lock actuators and reading four door ajar switches in a centralized BCM. IC Role / Device Role / Timing Role: Octal inverter buffers switch inputs (with hysteresis) and drives low-side FET gates for actuator control. Use Value: Input overvoltage tolerance permits direct connection to 12 V door switch circuits without external resistive dividers. |
Use Scenario: Controlling eight individual LED backlight strings in a TFT instrument cluster with PWM dimming. IC Role / Device Role / Timing Role: Inverting buffer translates MCU PWM signals to high-current LED drivers while providing galvanic isolation. Use Value: 8 mA output drive supports direct gate control of discrete MOSFETs without additional driver stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal inverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AHCT240QPWRQ1 | TSSOP20 package, identical AEC-Q100 Grade 1 rating, same 4.5–5.5 V VCC range and 8 mA drive. | No Schmitt-trigger inputs - less noise immunity on long harnesses; requires external filtering in high-EMI zones. | Prefer 74AHCT240PW-Q100 where input hysteresis is needed for unshielded sensor lines. |
| 74LVC240APW-Q100 | Lower VCC range (1.65–3.6 V), 24 mA drive, no overvoltage tolerance - incompatible with 5 V bus domains. | Designed for 3.3 V-only systems; unsuitable for mixed-voltage automotive subsystems. | Select only if entire system operates at 3.3 V and higher drive strength is required. |
Compared with SN74AHCT240QPWRQ1, the 74AHCT240PW-Q100 adds Schmitt-trigger inputs for superior noise rejection; compared with 74LVC240APW-Q100, it supports 5 V tolerant interfacing essential for legacy automotive sensor integration.
Availability
74AHCT240PW-Q100 is available at Aetrix Electronics and suitable for engine control units, body control modules, LIN transceiver interfaces, and automotive instrument clusters requiring stable component supply across extended temperature ranges and automotive lifecycle commitments.
Supply support for 74AHCT240PW-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, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.
The 74AHCT240-Q100 belongs to Nexperia's automotive-qualified logic family, engineered specifically for robust signal conditioning and bus isolation in harsh-temperature vehicle subsystems.
FAQ
Is the 74AHCT240PW-Q100 pin-compatible with standard 74HC240 or 74LS240 devices?
No. While functionally similar, the 74AHCT240PW-Q100 uses a TSSOP20 (SOT360-1) footprint distinct from SOIC-20 (74HC240) and PDIP-20 (74LS240). Pin numbering matches JEDEC-standard TSSOP layout: Pin 1 = 1OE, Pin 10 = GND, Pin 20 = VCC. Mechanical adaptation is required for drop-in replacement.
Can the 74AHCT240PW-Q100 operate with a 3.3 V supply?
No. The recommended VCC range is strictly 4.5 V to 5.5 V per Table 5. At 3.3 V, VIH minimum (2.0 V) exceeds 60% of VCC, violating TTL input compatibility and causing unreliable HIGH recognition. Use 74LVC240APW-Q100 instead for 3.3 V systems.
What is the purpose of the exposed thermal pad on the DHVQFN variant, and does the TSSOP version have one?
The DHVQFN20 (74AHCT240BQ-Q100) includes an exposed thermal pad (Pin 1 index area) for enhanced heat dissipation, but the TSSOP20 (74AHCT240PW-Q100) has no thermal pad. Its thermal performance relies on copper pour under Pins 10 (GND) and 20 (VCC); junction-to-ambient θJA is 100 K/W per SOT360-1 data.
Does the overvoltage tolerance apply to all inputs simultaneously, and what happens if VCC is unpowered?
Yes - all eight inputs tolerate up to 5.5 V regardless of VCC state. When VCC = 0 V, input clamping diodes limit current to ±20 mA (Table 4), allowing safe hot-plug operation. However, outputs remain in high-impedance state, and internal logic is inactive; no propagation occurs.
74AHCT240PW-Q100J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74AHCT
- Package/Case:
- 20-TSSOP (0.173", 4.40mm 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-TSSOP
74AHCT240PW-Q100J FAQ
1.How can I place an order for 74AHCT240PW-Q100J through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHCT240PW-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 74AHCT240PW-Q100J reliable?
The price and inventory of 74AHCT240PW-Q100J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHCT240PW-Q100J is usually 5 days.
3.What payment methods are accepted for 74AHCT240PW-Q100J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHCT240PW-Q100J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AHCT240PW-Q100J?
74AHCT240PW-Q100J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHCT240PW-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 74AHCT240PW-Q100J?
For technical support, including 74AHCT240PW-Q100J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHCT240PW-Q100J requirements.
6.How does Aetrix verify that 74AHCT240PW-Q100J is sourced from the original manufacturer or authorized distributors?
All 74AHCT240PW-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 74AHCT240PW-Q100J meets industry standards.
7.What is the process for return or replacement of 74AHCT240PW-Q100J?
All 74AHCT240PW-Q100J units undergo pre-shipment inspection (PSI). If there is an issue with 74AHCT240PW-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 74AHCT240PW-Q100J part is unused and in its original packaging.
Return procedure for 74AHCT240PW-Q100J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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