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NXP Semiconductors 74HC240D-Q100,118
- Part No.:
- 74HC240D-Q100,118
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74HC240D-Q100,118.pdf
- Description:
- IC BUFFER INVERT 6V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,972
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Product details
Overview
74HC240D-Q100 from Nexperia is an automotive-qualified octal inverting buffer/line driver with 3-state outputs, designed for bidirectional bus interfacing in harsh environments. It operates across 2.0 V to 6.0 V supply, delivers propagation delay as low as 9 ns at VCC = 6.0 V, supports -40 °C to +125 °C ambient range, and features dual independent output-enable inputs (1OE, 2OE) for selective bus isolation - used in engine control unit (ECU) signal conditioning and CAN/LIN transceiver interface buffering.
For engineers reviewing the 74HC240D-Q100 datasheet, 74HC240D-Q100 pinout, 74HC240D-Q100 application, or 74HC240D-Q100 equivalent, key selection criteria include 3-state timing (enable/disable times ≤38 ns), AEC-Q100 Grade 1 qualification, SO20 package thermal performance, and HC logic-level compatibility with legacy TTL systems.
Technical Context
This device implements two independent 4-bit inverting buffers, each with dedicated active-low 3-state enable (1OE for Group 1 outputs Y0–Y3; 2OE for Group 2 outputs Y0–Y3). Outputs enter high-impedance OFF-state when respective OE is HIGH, enabling bus sharing without contention.
It uses Si-gate CMOS technology for low static power (ICC ≤160 μA at 125 °C), high noise immunity (VIH/VIL thresholds defined across full VCC range), and latch-up immunity exceeding 100 mA per JESD78 Class II Level B - critical for automotive power rail stability and EMI resilience.
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 microcontrollers and legacy automotive logic without level-shifting. |
| Propagation Delay (tpd) | 9 ns (typ.) at VCC = 6.0 V, CL = 15 pF - ensures sub-10 ns signal path timing for high-speed bus arbitration in ECUs. |
| Enable/Disable Time (ten/tdis) | 11 ns / 12 ns (typ.) at VCC = 6.0 V - guarantees fast bus turnaround for time-critical communication protocols. |
| Output Drive Strength | ±7.8 mA (VOH/VOL @ VCC = 6.0 V) - sufficient to drive 50 pF loads over 10 cm PCB traces in noisy under-hood environments. |
| Operating Temperature | -40 °C to +125 °C - qualified per AEC-Q100 Grade 1 for placement near powertrain electronics without derating. |
| Input Capacitance (CI) | 3.5 pF - minimizes capacitive loading on upstream drivers, preserving signal integrity in multi-drop bus topologies. |
| ESD Protection | HBM >2000 V, CDM >1000 V - meets automotive system-level ESD robustness requirements per ISO 10605. |
Pinout & Package
74HC240D-Q100 is housed in a plastic small outline package (SO20, SOT163-1) with 20 leads and 7.5 mm body width. The package supports automated optical inspection (AOI) and offers thermal resistance (Rth(j-a)) of 109 °C/W at 100% board coverage.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output enable inputs - independently disable Group 1 (pins 12–18) or Group 2 (pins 3–9) outputs to isolate bus segments. |
| 2, 4, 6, 8 | 1A0–1A3 | Inverting data inputs for first buffer group - logic inversion occurs before 3-state output stage. |
| 12, 14, 16, 18 | 1Y0–1Y3 | Inverting 3-state outputs for first group - sink/source current only when 1OE = LOW; otherwise high-Z. |
| 11, 13, 15, 17 | 2A0–2A3 | Inverting data inputs for second buffer group - electrically isolated from Group 1 for dual-bus operation. |
| 3, 5, 7, 9 | 2Y0–2Y3 | Inverting 3-state outputs for second group - enables independent control of two 4-bit data paths on shared physical bus. |
| 10 | GND | Ground reference for all I/O and internal circuitry - must be connected to low-impedance chassis ground in automotive PCB layout. |
| 20 | VCC | Primary power supply input - requires local 100 nF ceramic decoupling within 5 mm to suppress switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for continuous operation from -40 °C to +125 °C in engine bay applications, including thermal cycling and humidity exposure. |
| Dual independent 3-state control | Separate 1OE and 2OE pins allow asymmetric bus management - e.g., hold one group active while disabling the other during firmware updates. |
| CMOS low-power static consumption | ICC ≤8.0 μA (typ.) at 25 °C and VCC = 6.0 V - reduces quiescent current in always-on vehicle modules like body control units. |
| Wide voltage compatibility | Functional across 2.0 V–6.0 V - supports mixed-voltage designs where sensors (3.3 V) and actuators (5 V) share a common logic interface. |
| High noise immunity | VIH ≥4.2 V and VIL ≤1.8 V at VCC = 6.0 V - rejects coupled transients up to ±2 V on signal lines in 12 V automotive electrical systems. |
Applications
| Engine Control Unit (ECU) Bus Isolation | Instrument Cluster Display Interface |
|---|---|
Use Scenario: Isolating sensor data buses from microcontroller I/O during flash programming to prevent spurious writes. IC Role / Device Role / Timing Role: Inverting 3-state buffer providing galvanically isolated signal path with <38 ns enable/disable timing. Use Value: Prevents bus contention during firmware update cycles, eliminating risk of corrupted calibration data in safety-critical engine maps. |
Use Scenario: Driving multiplexed LED backlight segments from a low-drive MCU GPIO bank. IC Role / Device Role / Timing Role: Octal inverting line driver translating 3.3 V logic to 5 V LED supply rails with current-sinking capability. Use Value: Enables single MCU to control 8 independent backlight zones without external FETs or level shifters. |
| Automotive LIN Transceiver Interface | Body Control Module (BCM) Door Lock Actuation |
Use Scenario: Buffering LIN master TX/RX signals between MCU and transceiver IC to meet ISO 17987-2 slew rate and noise margin requirements. IC Role / Device Role / Timing Role: Signal conditioner with controlled transition time (tt = 4–15 ns) and high-impedance isolation during sleep mode. Use Value: Ensures LIN bus compliance under worst-case load conditions while reducing electromagnetic emissions below CISPR 25 Class 5 limits. |
Use Scenario: Controlling solenoid drivers in door lock assemblies using shared MCU port pins. IC Role / Device Role / Timing Role: Dual-group 3-state buffer enabling sequential activation of left/right lock/unlock circuits from one 8-bit port. Use Value: Reduces PCB layer count by consolidating four independent solenoid control lines into a single routed bus with localized enable gating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal inverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HCT240D-Q100 | TTL-compatible input thresholds (VIH = 2.0 V min at VCC = 4.5–5.5 V); identical pinout and timing. | Better suited for mixed 5 V TTL/CMOS systems where upstream logic has weaker drive strength. | Select when interfacing with legacy 74LS or microcontrollers lacking CMOS-level VIH/VIL margins. |
| SN74LVC240APWRQ1 | Lower VCC range (1.65–3.6 V); 32 mA drive; smaller TSSOP-20 package (SOT360-1). | Optimized for 3.3 V-only domains (e.g., ADAS camera modules); not rated for 125 °C operation. | Choose for space-constrained 3.3 V designs requiring higher drive current but no extended temperature support. |
Compared with 74HC240D-Q100, the 74HCT240D-Q100 offers superior noise margin in 5 V TTL environments, while SN74LVC240APWRQ1 trades temperature range for lower voltage operation and higher drive - making the HC variant optimal for wide-supply, high-temp automotive bus isolation.
Availability
74HC240D-Q100 is available at Aetrix Electronics and suitable for engine control units, instrument clusters, LIN transceiver interfaces, and body control modules requiring stable component supply across automotive production lifecycles.
Supply support for 74HC240D-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 essential efficiency-enhancing components, delivering high-performance logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.
The 74HC240-Q100 belongs to Nexperia's automotive-qualified logic portfolio, engineered specifically for robust signal buffering and bus isolation in demanding under-hood and cabin electronics.
FAQ
What is the maximum clock frequency supported by the 74HC240D-Q100?
The 74HC240D-Q100 is not a clocked device and has no maximum clock frequency specification. It is a combinational logic buffer with propagation delay (tpd) of 9–30 ns depending on VCC and load. Its usable data rate is determined by signal rise/fall times and bus capacitance - typically supporting data edges up to ~35 MHz in point-to-point configurations with 15 pF load.
Can 74HC240D-Q100 drive a 50 Ω transmission line directly?
No. With ±7.8 mA output drive at VCC = 6.0 V, the 74HC240D-Q100 cannot match a 50 Ω line impedance. Its typical output impedance is ~50–100 Ω in active state, causing reflections and overshoot. For controlled-impedance routing, use series termination (e.g., 33 Ω resistor at driver output) or pair with a dedicated line driver IC.
Is the GND pin (pin 10) the only ground connection required?
Yes. Pin 10 is the sole dedicated ground terminal. The SO20 package has no exposed thermal pad or secondary ground path. All internal substrate and I/O structures reference this single GND node. PCB layout must provide low-inductance connection to main system ground plane with minimum trace length and multiple vias.
Does 74HC240D-Q100 support hot insertion or live bus swapping?
No. The device lacks powered-off protection or bus-fault tolerance. Applying signals to inputs or outputs while VCC = 0 V may forward-bias internal clamping diodes, causing excessive current flow (>20 mA limit). Always power VCC before applying logic signals, and use external series resistors if hot-swap operation is required.
74HC240D-Q100,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74HC
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- 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:
- 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
74HC240D-Q100,118 FAQ
1.How can I place an order for 74HC240D-Q100,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC240D-Q100,118 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 74HC240D-Q100,118 reliable?
The price and inventory of 74HC240D-Q100,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC240D-Q100,118 is usually 5 days.
3.What payment methods are accepted for 74HC240D-Q100,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC240D-Q100,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC240D-Q100,118?
74HC240D-Q100,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC240D-Q100,118 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 74HC240D-Q100,118?
For technical support, including 74HC240D-Q100,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC240D-Q100,118 requirements.
6.How does Aetrix verify that 74HC240D-Q100,118 is sourced from the original manufacturer or authorized distributors?
All 74HC240D-Q100,118 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 74HC240D-Q100,118 meets industry standards.
7.What is the process for return or replacement of 74HC240D-Q100,118?
All 74HC240D-Q100,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74HC240D-Q100,118, 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 74HC240D-Q100,118 part is unused and in its original packaging.
Return procedure for 74HC240D-Q100,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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