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NXP Semiconductors 74HC540N-Q100U
- Part No.:
- 74HC540N-Q100U
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
74HC540N-Q100U.pdf
- Description:
- IC BUFFER INVERT 6V 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,355
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Product details
Overview
74HC540N-Q100 from NXP Semiconductors is an automotive-grade 8-bit inverting buffer/line driver with dual 3-state output enables (OE1, OE2), CMOS-level inputs, and operation from −40 °C to +125 °C. It delivers ±35 mA output drive, 9 ns typical propagation delay at VCC = 6.0 V, and high-impedance outputs for bus isolation in automotive body control modules.
For engineers reviewing the 74HC540N-Q100 datasheet, 74HC540N-Q100 pinout, 74HC540N-Q100 application, or 74HC540N-Q100 equivalent, this page provides verified AEC-Q100 Grade 1 qualification status, DIP20 package mapping, functional table behavior, static/dynamic electrical limits, and direct alternatives for automotive signal buffering and bus interface design.
Technical Context
This device implements dual active-low output enable logic controlling eight inverting buffer stages. Each output transitions to high-impedance when either OE1 or OE2 is HIGH, enabling flexible bus arbitration. Inputs include clamp diodes supporting interfacing to voltages exceeding VCC via current-limiting resistors.
It complies with JEDEC Std 7A and meets AEC-Q100 Grade 1 requirements, with validated operation across −40 °C to +125 °C ambient. Static parameters include VIH = 4.2 V (min) at VCC = 6.0 V and VOL = 0.26 V (max) at IO = 7.8 mA, ensuring robust noise margins in noisy automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | 8-bit inverting 3-state buffer/line driver with dual OE control |
| Supply voltage range | 2.0 V to 6.0 V - supports 3.3 V and 5 V automotive domains |
| Propagation delay | 9 ns (typ) at VCC = 6.0 V - enables high-speed data routing in body electronics |
| Output drive | ±35 mA - sufficient to directly drive LEDs, relays, or TTL loads without external buffers |
| Operating temperature | −40 °C to +125 °C - qualified per AEC-Q100 Grade 1 for under-hood and cabin applications |
| Input compatibility | CMOS-level inputs - matches HC-family logic thresholds for seamless integration |
| ESD rating | HBM > 2000 V - withstands handling and assembly stress in automotive production |
Pinout & Package
74HC540N-Q100 uses the plastic dual in-line package (DIP20), SOT146-1 variant, with 300-mil lead spacing and through-hole mounting. The package is rated for operation up to +125 °C ambient and supports standard wave soldering profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE1) | Active-low output enable | Asserting HIGH disables all Y0–Y7 outputs; used for primary bus control |
| 2–9 (A0–A7) | Data inputs | Invert and buffer incoming signals; CMOS-compatible thresholds |
| 10 (GND) | Ground reference | 0 V return path for all internal logic and output stages |
| 11–18 (Y0–Y7) | Inverting buffered outputs | Drive external loads with ±35 mA capability; enter high-Z when OE1 or OE2 is HIGH |
| 19 (OE2) | Active-low output enable | Redundant or secondary enable for fault-tolerant bus gating |
| 20 (VCC) | Positive supply | 2.0–6.0 V power rail; decoupling required within 10 mm of pin |
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 HTOL |
| Dual independent output enables | OE1 and OE2 provide redundant or hierarchical bus control-either HIGH forces all outputs to high-Z |
| Input clamp diodes | Enable safe interfacing to voltages > VCC using series current-limiting resistors, critical for mixed-voltage subsystems |
| Low dynamic power dissipation | CPD = 39 pF - minimizes switching current in always-on vehicle networks |
| JEDEC Std 7A compliance | Ensures interoperability with industry-standard logic families and test methodologies |
Applications
| Body Control Module (BCM) | Instrument Cluster Interface |
|---|---|
Use Scenario: Isolating microcontroller GPIOs from high-current door lock actuators and lamp drivers. IC Role / Device Role / Timing Role: Inverting 3-state buffer providing level-shifted, current-boosted, and electrically isolated signal paths between MCU and power stages. Use Value: Prevents backfeed into MCU pins during actuator faults and enables shared bus topology with multiple load drivers. |
Use Scenario: Driving segmented LCD backlight controls and CAN transceiver enable lines from a low-drive MCU. IC Role / Device Role / Timing Role: Signal conditioning and fan-out buffer with precise timing (9 ns tpd) for synchronized display updates. Use Value: Eliminates need for discrete transistor arrays while maintaining AEC-Q100 compliance and ESD robustness. |
| Power Distribution Unit (PDU) | Automotive Gateway Subsystem |
Use Scenario: Controlling 12 V solenoid valves in engine bay fuse boxes with microcontroller-safe logic levels. IC Role / Device Role / Timing Role: Voltage-level translation and current amplification stage between 3.3 V MCU outputs and 12 V driver ICs. Use Value: Clamp diodes allow direct connection to 12 V sense lines with only series resistors-no level-shifter ICs required. |
Use Scenario: Buffering diagnostic enable signals between ASIL-B microcontrollers and safety-critical sensor interfaces. IC Role / Device Role / Timing Role: Fault-isolated signal repeater with dual OE inputs enabling fail-safe shutdown of downstream buses. Use Value: Dual OE allows hardware-based bus disable during watchdog timeout or error detection, meeting ISO 26262 functional safety requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit inverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HCT540N-Q100 | TTL-level inputs (VIH = 2.0 V min), identical pinout and timing | Better compatibility with legacy 5 V TTL microcontrollers and peripherals | Select when interfacing to non-CMOS logic families or mixed-signal systems with 5 V TTL signaling |
| SN74LV540APWREP | Lower VCC range (2.0–5.5 V), LV logic family, enhanced ESD (4000 V HBM) | Optimized for 3.3 V-only automotive domains; not rated for 6 V operation | Prefer for new 3.3 V designs requiring extended ESD margin and lower static current |
Compared with 74HC540N-Q100, the 74HCT540N-Q100 offers TTL input compatibility at identical packaging and temperature grade, while SN74LV540APWREP trades 6 V tolerance for superior 3.3 V efficiency and ESD resilience-making each suitable for distinct voltage architecture choices in automotive ECUs.
Availability
74HC540N-Q100 is available at Aetrix Electronics and suitable for automotive body control modules, instrument clusters, power distribution units, and gateway subsystems requiring stable component supply with AEC-Q100 Grade 1 assurance.
Supply support for 74HC540N-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
NXP Semiconductors is a global semiconductor company specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with leadership in AEC-Q100-qualified logic and interface products.
The 74HC540N-Q100 belongs to NXP's automotive-qualified HC logic family, designed specifically for robust signal buffering, bus isolation, and level translation in harsh-temperature vehicle subsystems.
FAQ
What is the maximum supply voltage for 74HC540N-Q100?
The absolute maximum supply voltage for 74HC540N-Q100 is +7.0 V, but the recommended operating range is 2.0 V to 6.0 V. Operation above 6.0 V risks exceeding static current limits and degrading long-term reliability-even though the device may function temporarily. Always observe the 6.0 V upper limit in production designs using 74HC540N-Q100.
Does 74HC540N-Q100 support hot insertion?
No, 74HC540N-Q100 does not support hot insertion. Its inputs lack powered-off protection circuitry, and applying signals while VCC is absent can forward-bias internal clamp diodes, causing excessive current flow. System-level hot-swap capability requires external protection-74HC540N-Q100 must be powered before signal application.
How do OE1 and OE2 interact in 74HC540N-Q100?
In 74HC540N-Q100, either OE1 or OE2 asserted HIGH independently forces all eight outputs (Y0–Y7) into high-impedance state. Both enables are OR'd internally-no priority or sequencing is defined. This architecture allows redundant control paths or separate domain gating, and is confirmed by the functional table where X (don't care) appears when either enable is HIGH.
Is 74HC540N-Q100 pin-compatible with non-automotive 74HC540 variants?
Yes, 74HC540N-Q100 shares identical pinout and electrical behavior with standard 74HC540N (non-Q100) in DIP20 packaging. However, it adds AEC-Q100 Grade 1 qualification, extended temperature validation (−40 °C to +125 °C), and automotive-specific reliability testing-making it a drop-in replacement where automotive compliance is required.
What is the typical propagation delay of 74HC540N-Q100 at 5.0 V?
At VCC = 5.0 V with CL = 15 pF, the typical propagation delay (tpd) of 74HC540N-Q100 is 9 ns, as specified in Table 7 of the datasheet. This value applies to both tPLH and tPHL transitions and reflects performance under standard test conditions-actual board-level delay will vary with trace capacitance and load.
74HC540N-Q100U Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74HC
- Package/Case:
- 20-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- Buffer, 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:
- Through Hole
- Supplier Device Package:
- 20-DIP
74HC540N-Q100U FAQ
1.How can I place an order for 74HC540N-Q100U through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC540N-Q100U 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 74HC540N-Q100U reliable?
The price and inventory of 74HC540N-Q100U are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC540N-Q100U is usually 5 days.
3.What payment methods are accepted for 74HC540N-Q100U?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC540N-Q100U transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC540N-Q100U?
74HC540N-Q100U orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC540N-Q100U 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 74HC540N-Q100U?
For technical support, including 74HC540N-Q100U datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC540N-Q100U requirements.
6.How does Aetrix verify that 74HC540N-Q100U is sourced from the original manufacturer or authorized distributors?
All 74HC540N-Q100U 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 74HC540N-Q100U meets industry standards.
7.What is the process for return or replacement of 74HC540N-Q100U?
All 74HC540N-Q100U units undergo pre-shipment inspection (PSI). If there is an issue with 74HC540N-Q100U, 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 74HC540N-Q100U part is unused and in its original packaging.
Return procedure for 74HC540N-Q100U:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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