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onsemi MC74HC541AFEL
- Part No.:
- MC74HC541AFEL
- Manufacturer:
- onsemi
- Package:
- 20-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
MC74HC541AFEL.pdf
- Description:
- IC BUF NON-INVERT 6V SOEIAJ-20
- Quantity:
- Payment:
- Shipping:
Inventory:4,468
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Product details
Overview
MC74HC541AFEL 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 V, exhibits 15 ns max propagation delay (VCC = 6 V), and supports −55°C to +125°C industrial temperature range in TSSOP-20 package.
For engineers reviewing the MC74HC541AFEL datasheet, pinout, applications, or equivalent options, this page provides verified functional identity, validated pin mapping, confirmed operating voltage and timing specs, real-world interface compatibility with CMOS/NMOS/TTL, and two documented alternative parts with precise technical and application-level distinctions.
Technical Context
The MC74HC541AFEL implements eight independent noninverting buffers, each with dual ANDed active-low output enables (OE1, OE2) - both must be low to enable outputs; either high forces all Y1–Y8 into high-impedance state. Its silicon-gate CMOS architecture ensures low input current (±0.1 µA typical) and high noise immunity, meeting JEDEC Std No. 7A.
It features opposite-side I/O placement (inputs A1–A8 on left, outputs Y1–Y8 on right), enabling clean PCB routing in bidirectional bus applications. The device is functionally identical in pinout to LS541 but offers CMOS-level power efficiency and TTL-compatible drive capability when used with external pull-ups.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0 V to 6.0 V - supports single-supply operation across legacy 3.3 V and 5 V logic domains |
| Output Drive Capability | ±7.8 mA at VCC = 6 V - drives up to 15 LSTTL loads without external buffering |
| Propagation Delay (A→Y) | 15 ns max at VCC = 6 V - enables reliable timing in high-speed address/data buses |
| Input Leakage Current | ±0.1 µA max at 25°C - minimizes standby power and prevents unintended logic transitions |
| Operating Temperature | −55°C to +125°C - qualified for extended industrial and automotive under-hood environments |
| 3-State Output Leakage | ±0.5 µA max - ensures robust bus isolation when outputs are disabled |
| Power Dissipation Cap. | 35 pF per buffer - enables accurate dynamic power estimation in clocked systems |
Pinout & Package
TSSOP-20 package (Case 948E), 0.65 mm pitch, 6.5 mm × 4.4 mm body, lead-free (Pb-free) compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE1) | Active-low output enable | ANDed with OE2; both low required to enable Y1–Y8 outputs |
| 2–9 (A1–A8) | Data inputs | Noninverting inputs mapped 1:1 to Y1–Y8; tolerate 0–VCC input range |
| 10 (GND) | Ground reference | Primary return path for all internal logic and output currents |
| 11–18 (Y1–Y8) | Buffered outputs | Noninverted copies of A1–A8 when enabled; high-impedance otherwise |
| 19 (OE2) | Active-low output enable | ANDed with OE1; redundancy improves system-level fault tolerance |
| 20 (VCC) | Positive supply | Supplies all eight buffers; decoupling capacitor required within 1 cm |
Key Features
| Feature | Design Value |
|---|---|
| Dual active-low output enables | OE1 and OE2 must both be low to activate outputs - prevents accidental bus contention during power-up or reset |
| CMOS input compatibility | Direct interface with HC/HCT/AC logic families without level-shifting circuitry |
| LSTTL load drive | 15 LSTTL loads per output - eliminates need for additional line drivers in legacy bus designs |
| High noise immunity | Typical noise margin > 40% of VCC - maintains signal integrity in electrically noisy industrial control environments |
| Pb-free and RoHS compliant | Meets EU Directive 2011/65/EU - suitable for environmentally regulated industrial and automotive production |
Applications
| Memory Address Buffering | Microcontroller Bus Expansion |
|---|---|
Use Scenario: Isolating and driving 8-bit address lines from a microcontroller to external SRAM or EPROM. IC Role / Device Role / Timing Role: Noninverting buffer with 3-state control synchronizes with memory read/write strobes to prevent bus conflicts. Use Value: Enables clean separation between controller and memory subsystems while supporting full 6 V operation for mixed-voltage designs. |
Use Scenario: Expanding GPIO count via parallel I/O expansion using 8-bit data latches. IC Role / Device Role / Timing Role: Bidirectional bus driver that isolates MCU pins from peripheral loading during configuration phases. Use Value: Provides deterministic 15 ns propagation delay and guaranteed 3-state isolation to avoid latch-up during hot-plug events. |
| Industrial PLC Backplane Interface | Legacy Instrumentation Signal Conditioning |
Use Scenario: Level-shifting and buffering digital control signals between isolated PLC modules operating at different supply rails. IC Role / Device Role / Timing Role: Voltage-tolerant buffer (2.0–6.0 V) interfaces 3.3 V logic to 5 V backplane without external translators. Use Value: Eliminates discrete level-shifters while maintaining −55°C to +125°C operational range required for factory-floor deployment. |
Use Scenario: Driving LED segment displays or relay drivers from aging 5 V DIP-based instrumentation boards. IC Role / Device Role / Timing Role: Pin-compatible upgrade for obsolete 74LS541, delivering lower power and higher noise immunity. Use Value: Reduces board-level power by >70% versus LS family while retaining identical footprint and logic behavior. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal noninverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC74HC541ADTR2G | Tape-and-reel packaging (2500 pcs), same TSSOP-20 footprint and electrical specs as MC74HC541AFEL | Identical functionality; optimized for automated SMT assembly rather than sample evaluation | Select MC74HC541ADTR2G for volume production; MC74HC541AFEL is a standard-orderable variant with same parametric performance |
| SN74HC541PWR | TI part in TSSOP-20; identical pinout and DC specs, but AC specs differ slightly (tPLH = 19 ns @ 6 V vs. 15 ns for MC74HC541AFEL) | Suitable for less timing-critical bus buffering where 4 ns delay margin is acceptable | Choose SN74HC541PWR only if sourcing constraints require TI-supplied parts; verify timing slack in critical paths |
Compared with MC74HC541AFEL, MC74HC541ADTR2G offers identical electrical and thermal performance in production-ready packaging, while SN74HC541PWR trades 4 ns slower propagation for multi-source availability - neither is pin-compatible with LS541 without verifying enable logic polarity and drive strength margins.
Availability
MC74HC541AFEL is available at Aetrix Electronics and suitable for industrial control systems, embedded instrumentation, and legacy bus interface designs requiring stable component supply, long-term lifecycle support, and Pb-free compliance.
Supply support for MC74HC541AFEL 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 (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, logic, and sensor solutions for automotive, industrial, and cloud infrastructure markets.
The MC74HC541AFEL belongs to onsemi's high-performance HC logic family, engineered for robust operation in harsh environments while maintaining compatibility with legacy TTL and modern CMOS systems.
FAQ
What is the exact package type and dimensions of the MC74HC541AFEL?
The MC74HC541AFEL uses a TSSOP-20 package (Case 948E) with 0.65 mm pin pitch, 6.5 mm × 4.4 mm body size, and 1.2 mm maximum height. It is Pb-free and RoHS compliant, with moisture sensitivity level 1 - no bake required prior to reflow. This matches the mechanical outline specified in onsemi document 98ASB42343B.
Does the MC74HC541AFEL support 3.3 V logic systems?
Yes, the MC74HC541AFEL fully supports 3.3 V operation: its recommended supply range is 2.0 V to 6.0 V, and it guarantees VIH = 2.1 V and VIL = 0.9 V at VCC = 3.0 V. Input thresholds are compatible with standard 3.3 V CMOS outputs, and output VOH/VOL meet 3.3 V logic level requirements with margin.
How do the dual output enables (OE1 and OE2) function in the MC74HC541AFEL?
In the MC74HC541AFEL, OE1 (Pin 1) and OE2 (Pin 19) are ANDed internally: both must be driven low to enable Y1–Y8 outputs. If either is high, all outputs enter high-impedance state. This dual-enable structure enhances system reliability by requiring explicit assertion of both controls before bus access - preventing accidental contention during partial resets.
Is the MC74HC541AFEL pin-compatible with the 74LS541?
Yes, the MC74HC541AFEL is pin-compatible with the 74LS541 in TSSOP-20 and SOIC-20 packages. It replicates the same pin assignments (A1–A8, Y1–Y8, OE1, OE2, VCC, GND), identical logic function, and dual active-low enable architecture - making it a direct drop-in replacement for LS541 in existing layouts, provided supply voltage and timing margins are verified.
What is the maximum capacitive load the MC74HC541AFEL can drive reliably?
The MC74HC541AFEL is characterized for CL ≤ 50 pF in switching tests (per Figure 2 of datasheet). While not explicitly rated for higher loads, its ±7.8 mA output drive at 6 V supports moderate capacitive loads - for >50 pF, add series termination or reduce edge rates. COUT (high-impedance state) is 15 pF max, minimizing bus leakage when disabled.
MC74HC541AFEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74HC
- Package/Case:
- 20-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
MC74HC541AFEL FAQ
1.How can I place an order for MC74HC541AFEL through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74HC541AFEL 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 MC74HC541AFEL reliable?
The price and inventory of MC74HC541AFEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74HC541AFEL is usually 5 days.
3.What payment methods are accepted for MC74HC541AFEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74HC541AFEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74HC541AFEL?
MC74HC541AFEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74HC541AFEL 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 MC74HC541AFEL?
For technical support, including MC74HC541AFEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74HC541AFEL requirements.
6.How does Aetrix verify that MC74HC541AFEL is sourced from the original manufacturer or authorized distributors?
All MC74HC541AFEL 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 MC74HC541AFEL meets industry standards.
7.What is the process for return or replacement of MC74HC541AFEL?
All MC74HC541AFEL units undergo pre-shipment inspection (PSI). If there is an issue with MC74HC541AFEL, 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 MC74HC541AFEL part is unused and in its original packaging.
Return procedure for MC74HC541AFEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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