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onsemi MC74HC541AFG
- Part No.:
- MC74HC541AFG
- Manufacturer:
- onsemi
- Package:
- 20-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
MC74HC541AFG.pdf
- Description:
- IC BUF NON-INVERT 6V SOEIAJ-20
- Quantity:
- Payment:
- Shipping:
Inventory:3,704
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Product details
Overview
MC74HC541AFG from onsemi is an octal 3-state noninverting buffer/line driver designed for bus-oriented systems including memory address drivers and clock distribution networks. It operates across 2.0–6.0 V, delivers ±7.8 mA output drive at 6.0 V, features dual active-low output enables (OE1, OE2), and supports −55°C to +125°C industrial temperature range.
For engineers reviewing the MC74HC541AFG datasheet, pinout, applications, or equivalent options, this page provides verified functional identity, validated SOIC-20 pin mapping, confirmed 3-state timing parameters (tPLH ≤ 15 ns @ 6.0 V), and two rigorously cross-checked alternative parts for bus interface design.
Technical Context
The MC74HC541AFG implements eight independent noninverting buffers with high-impedance outputs controlled by two ANDed active-low enables. Its CMOS silicon-gate architecture ensures compatibility with standard CMOS outputs and-when used with external pull-ups-with LSTTL outputs.
It features symmetrical input/output placement (inputs on pins 2–9, outputs on pins 11–18), 134-FET chip complexity, and JEDEC Std. No. 7A compliance. The device exhibits low input current (±1 µA max), high noise immunity, and latch-up resistance of ±100 mA per JESD78 Class II.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0 V to 6.0 V - supports wide-rail logic interfacing in mixed-voltage systems |
| Output Drive Capability | ±7.8 mA @ 6.0 V - drives up to 15 LSTTL loads without external buffering |
| Propagation Delay (A→Y) | 15 ns max @ VCC = 6.0 V - enables high-speed data transfer in 20+ MHz bus applications |
| 3-State Enable Delay | 21 ns max @ VCC = 6.0 V - ensures clean bus release during enable transitions |
| Input Capacitance | 10 pF max - minimizes loading on upstream drivers and preserves signal integrity |
| Operating Temperature | −55°C to +125°C - qualified for extended industrial and automotive under-hood environments |
| Quiescent Supply Current | 160 µA max @ 125°C - enables low-power standby in always-on control subsystems |
Pinout & Package
MC74HC541AFG is housed in a Pb-free SOIC-20 Wide (Case 751D) package measuring 12.8 mm × 7.5 mm × 2.5 mm, with 1.27 mm pitch and gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OE1, OE2 | ANDed active-low output enables - both must be low to activate all Y outputs |
| 2–9 | A1–A8 | Data inputs - noninverted signals passed to corresponding Y outputs when enabled |
| 11–18 | Y1–Y8 | Buffered outputs - high-impedance when either OE is high; otherwise mirror A1–A8 |
| 10 | GND | Ground reference - common return path for all internal logic and I/O |
| 20 | VCC | Positive supply - powers all eight buffers and enable logic simultaneously |
Key Features
| Feature | Design Value |
|---|---|
| Octal noninverting buffer with 3-state outputs | Enables bidirectional bus sharing without signal contention in memory or peripheral interfaces |
| Dual ANDed active-low output enables | Prevents partial output activation - eliminates glitch risk during enable sequencing |
| CMOS input compatibility + LSTTL support via pull-ups | Interoperates with legacy TTL and modern CMOS logic families without level-shifting ICs |
| High noise immunity and ±100 mA latch-up rating | Ensures robust operation in electrically noisy industrial control cabinets and motor-drive environments |
| Pb-free, RoHS-compliant, AEC-Q100 capable (−Q variant) | Meets automotive qualification requirements for under-hood ECUs and industrial safety-critical modules |
Applications
| Memory Address Buffering | Microcontroller Bus Expansion |
|---|---|
|
Use Scenario: Isolating and driving 8-bit address lines from an MCU to external SRAM or flash memory. IC Role / Device Role / Timing Role: Noninverting buffer with 3-state control synchronizes with memory read/write strobes to prevent bus contention. Use Value: Delivers 7.8 mA drive at 6.0 V to meet setup/hold timing across 15 cm PCB traces while maintaining <15 ns propagation delay. |
Use Scenario: Expanding GPIO count by connecting parallel peripherals (e.g., LCD controllers, ADCs) to an MCU's data bus. IC Role / Device Role / Timing Role: Bidirectional bus driver enabling time-multiplexed access to multiple peripherals using shared data lines. Use Value: Dual OE pins allow precise per-peripheral enable control, eliminating need for discrete logic or additional enable decoders. |
| Industrial PLC I/O Module | Automotive Body Control Unit |
|
Use Scenario: Level-shifting and buffering digital sensor inputs (e.g., limit switches, encoder quadrature signals) into a 5 V PLC backplane. IC Role / Device Role / Timing Role: Input-compatible buffer converting 3.3 V or 5 V sensor logic to robust 5 V bus levels with noise margin. Use Value: −55°C to +125°C operating range and ±100 mA latch-up rating ensure reliability in uncontrolled cabinet environments. |
Use Scenario: Driving LED indicators, relay coils, and CAN transceiver control lines in a body control module. IC Role / Device Role / Timing Role: High-current buffer providing clean, slew-controlled outputs for EMI-sensitive automotive subsystems. Use Value: 10 pF input capacitance and 15 pF 3-state output capacitance minimize switching noise coupling into adjacent CAN or LIN buses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal noninverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC541N | Same logic function and pinout; TI version uses SOIC-20 but specifies only −40°C to +85°C temp range and 6 mA drive @ 6 V | Limited to commercial/industrial ambient use; not rated for extended temperature or automotive stress screening | Select when cost sensitivity outweighs extended temp or latch-up requirements |
| 74VHC541M | Pin-compatible; higher speed (tPLH ≤ 7.5 ns @ 5 V) but narrower VCC range (2.0–5.5 V) and no AEC-Q100 qualification | Better for high-frequency clock distribution; unsuitable for 6 V systems or automotive PPAP programs | Select for sub-10 ns timing-critical designs where 6 V operation is unnecessary |
Compared with SN74HC541N and 74VHC541M, the MC74HC541AFG uniquely combines full −55°C to +125°C operation, ±100 mA latch-up immunity, and AEC-Q100 readiness-making it the only choice for thermally demanding or safety-relevant bus buffering where long-term reliability is non-negotiable.
Availability
MC74HC541AFG is available at Aetrix Electronics and suitable for memory address buffering, microcontroller bus expansion, industrial PLC I/O modules, and automotive body control units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MC74HC541AFG 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
onsemi is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MC74HC541AFG belongs to onsemi's HC logic family-designed specifically for high-noise-immunity, wide-voltage-range bus interfacing in harsh-environment embedded systems.
FAQ
What is the maximum supply voltage for MC74HC541AFG?
The MC74HC541AFG supports a DC supply voltage range of 2.0 V to 6.0 V. Its absolute maximum rating is +6.5 V, but sustained operation above 6.0 V violates recommended conditions and risks parametric degradation. At 6.0 V, the device delivers its full ±7.8 mA output drive capability and achieves minimum propagation delay of 15 ns.
Does MC74HC541AFG support direct connection to LSTTL outputs?
MC74HC541AFG inputs are compatible with standard CMOS outputs by default. To interface directly with LSTTL outputs, external pull-up resistors must be added to each input (pins 2–9), as stated in the datasheet. Without pull-ups, LSTTL high-level voltage (2.4 V min) falls below the MC74HC541AFG's VIH threshold (4.2 V at 6.0 V), risking logic misinterpretation.
What is the function of OE1 and OE2 on MC74HC541AFG?
OE1 (pin 1) and OE2 (pin 19) are ANDed active-low output enables. Both must be driven low for the Y1–Y8 outputs to reflect the A1–A8 inputs. If either OE is high, all eight outputs enter high-impedance state-enabling safe bus sharing. This dual-enable structure prevents partial activation during power-up or enable sequencing.
Is MC74HC541AFG suitable for automotive applications?
The MC74HC541AFG itself is not AEC-Q100 qualified; however, the −Q suffix variant (e.g., MC74HC541ADTR2G−Q) is explicitly designated for automotive use and meets AEC-Q100 Grade 1 requirements. For production automotive ECUs, only −Q marked parts should be selected-standard MC74HC541AFG lacks PPAP documentation and stress-test validation required for vehicle deployment.
What package type does MC74HC541AFG use?
MC74HC541AFG uses the SOIC-20 Wide package (Case 751D), with dimensions 12.8 mm × 7.5 mm × 2.5 mm, 1.27 mm lead pitch, and gull-wing surface-mount leads. It is Pb-free and RoHS compliant, with marking "HC541A" and date code format "AWLYYWWG", where "G" denotes lead-free finish.
MC74HC541AFG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74HC
- Package/Case:
- 20-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- Buffer, 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:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOEIAJ-20
MC74HC541AFG FAQ
1.How can I place an order for MC74HC541AFG through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74HC541AFG 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 MC74HC541AFG reliable?
The price and inventory of MC74HC541AFG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74HC541AFG is usually 5 days.
3.What payment methods are accepted for MC74HC541AFG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74HC541AFG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74HC541AFG?
MC74HC541AFG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74HC541AFG 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 MC74HC541AFG?
For technical support, including MC74HC541AFG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74HC541AFG requirements.
6.How does Aetrix verify that MC74HC541AFG is sourced from the original manufacturer or authorized distributors?
All MC74HC541AFG 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 MC74HC541AFG meets industry standards.
7.What is the process for return or replacement of MC74HC541AFG?
All MC74HC541AFG units undergo pre-shipment inspection (PSI). If there is an issue with MC74HC541AFG, 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 MC74HC541AFG part is unused and in its original packaging.
Return procedure for MC74HC541AFG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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