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Texas Instruments SN74HC541APW
- Part No.:
- SN74HC541APW
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74HC541APW.pdf
- Description:
- IC BUFFER NON-INVERT 6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,450
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Product details
Overview
SN74HC541APW from Texas Instruments is an octal non-inverting 3-state buffer/line driver designed for bidirectional data bus interfacing and signal isolation in digital systems. It features dual active-low output enables (OE1, OE2), CMOS-level input compatibility, ±35 mA output drive capability, and operates across 2.0 V to 6.0 V supply voltage with guaranteed performance from −40 °C to +125 °C. It is commonly used in microcontroller I/O expansion, memory address/data buffering, and industrial control backplanes.
For engineers reviewing the SN74HC541APW datasheet, SN74HC541APW pinout, SN74HC541APW application, or SN74HC541APW equivalent, key selection considerations include its 20-pin TSSOP package, dual independent output enable control, high-impedance state leakage < ±0.5 µA at 6.0 V, propagation delay of 10 ns (typ) at VCC = 6.0 V, and input clamp diodes enabling safe interface to voltages exceeding VCC.
Technical Context
The SN74HC541APW implements eight identical non-inverting buffer circuits, each with independent input-to-output signal path and shared 3-state output control via OE1 and OE2. Its logic design ensures simultaneous enable/disable of all outputs when either OE is asserted low, supporting flexible bus arbitration schemes.
It uses standard CMOS silicon process technology with input clamp diodes for overvoltage tolerance, rail-to-rail output swing, and static current consumption below 8 µA (typ) at 25 °C. The device complies with JEDEC Standard No. 7A and supports mixed-voltage system interfacing through its wide VCC range and defined VIH/VIL thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage (VCC) | 2.0 V to 6.0 V - Enables direct interface with 3.3 V and 5 V logic families without level shifters. |
| Output Drive Current | ±35 mA - Sufficient to drive multiple TTL loads or terminate transmission lines in medium-speed digital buses. |
| Propagation Delay (tpd) | 10 ns (typ) at VCC = 6.0 V - Supports reliable operation up to ~50 MHz clocked bus applications. |
| Input Clamp Diodes | Present - Allows use of external current-limiting resistors when interfacing to signals > VCC (e.g., 12 V sensor inputs). |
| OFF-State Output Leakage | ±0.5 µA max at VCC = 6.0 V - Ensures minimal bus contention during 3-state disable in high-density PCB layouts. |
| Operating Temperature | −40 °C to +125 °C - Qualified for under-hood automotive modules, industrial PLCs, and extended-temperature embedded controllers. |
| ESD Protection | HBM > 2000 V - Provides robust handling integrity during automated assembly and field service. |
Pinout & Package
TSSOP20 plastic thin shrink small outline package (SOT360-1), 20-lead, body width 4.4 mm, 0.65 mm lead pitch, exposed pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE1) | Active-low output enable 1 | Asserting low disables Y0–Y7 outputs simultaneously; tied high or controlled by system logic for group gating. |
| 2–9 (A0–A7) | Data inputs | Non-inverting inputs accepting CMOS-level signals; internally clamped to VCC/GND for overvoltage resilience. |
| 10 (GND) | Ground reference | Primary return path for all internal logic and output currents; requires low-impedance PCB connection. |
| 11–18 (Y0–Y7) | 3-state buffered outputs | Drive external loads only when OE1 and OE2 are both low; high-impedance state isolates bus segments. |
| 19 (OE2) | Active-low output enable 2 | Second independent enable input - OR logic with OE1 means either low disables all outputs. |
| 20 (VCC) | Positive supply | Power rail for internal logic and output drivers; decoupling capacitor (100 nF) required within 10 mm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent output enables | OE1 and OE2 provide redundant or split-bus control - enables fault-tolerant enable routing in safety-critical designs. |
| Input clamp diodes | Allow safe interface to voltages up to VCC + 0.5 V using series current-limiting resistors - eliminates need for external protection in mixed-supply systems. |
| Wide supply range (2.0–6.0 V) | Supports direct integration into both 3.3 V microcontroller domains and legacy 5 V peripheral subsystems without voltage translation. |
| Low dynamic power dissipation | CPD = 37 pF - limits switching power to < 1.5 mW at 10 MHz with 5 V supply, reducing thermal load in dense logic arrays. |
| JEDEC Std. 7A compliance | Ensures interoperability with industry-standard test equipment, boundary-scan tools, and automated optical inspection systems. |
Applications
| Industrial PLC Backplane Buffering | Microcontroller I/O Expansion |
|---|---|
Use Scenario: Isolating CPU address/data bus from modular I/O racks in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional 3-state buffer managing multiplexed bus access between master controller and distributed slave modules. Use Value: Dual OE inputs allow independent enable control per rack segment, minimizing bus contention during hot-swap events. |
Use Scenario: Expanding GPIO count of ARM Cortex-M0+ MCU in smart sensor node with analog front-end and RS-485 transceiver. IC Role / Device Role / Timing Role: Non-inverting line driver translating MCU logic levels to higher-current bus signals while maintaining timing integrity. Use Value: 10 ns propagation delay ensures setup/hold timing margins are preserved at 24 MHz SPI clock rates. |
| Memory Address Latching Interface | Legacy Parallel Printer Port Driver |
Use Scenario: Driving 8-bit address lines from FPGA to external SRAM in embedded instrumentation system. IC Role / Device Role / Timing Role: Octal buffer providing fan-out gain and noise immunity on critical address bus traces. Use Value: ±35 mA drive strength sustains signal integrity over 10 cm FR-4 traces with 50 pF load, eliminating need for trace termination. |
Use Scenario: Interfacing 8-bit parallel data bus from PC motherboard to thermal printer head requiring 5 V TTL-compatible inputs. IC Role / Device Role / Timing Role: Level-shifting and current-boosting buffer ensuring reliable data capture at 1 Mbps print data rate. Use Value: CMOS input thresholds (VIH = 3.15 V min at VCC = 4.5 V) guarantee clean recognition of PC-side logic highs despite ground bounce. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HCT541PW | TTL-compatible inputs (VIH = 2.0 V min), otherwise identical pinout, timing, and drive strength. | Better suited for direct interface to 5 V TTL logic without pull-up resistors; less tolerant of floating inputs. | Select when driving legacy 74LS-series peripherals or when input noise immunity at low VIH is prioritized. |
| 74LCX541MTCX | Lower VCC range (2.0–3.6 V), 3.6 V tolerant inputs, 24 mA drive, smaller TSSOP-20 (SOT360-1 compatible footprint). | Optimized for 3.3 V-only systems; not suitable for 5 V bus interfacing due to absolute max VCC = 3.6 V. | Choose for space-constrained 3.3 V applications where lower dynamic power (CPD = 22 pF) and reduced EMI are critical. |
Compared with SN74HC541APW, SN74HCT541PW offers improved compatibility with older TTL logic but sacrifices input noise margin, while 74LCX541MTCX reduces power and size at the cost of 5 V operation support - making SN74HC541APW the optimal choice for mixed-voltage industrial interfaces requiring robust overvoltage tolerance and wide temperature operation.
Availability
SN74HC541APW is available at Aetrix Electronics and suitable for industrial automation, embedded control, and test equipment applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for SN74HC541APW 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
Texas Instruments is a global semiconductor company specializing in analog and embedded processing solutions, with leadership in logic, power management, and signal chain technologies.
The SN74HC541APW belongs to TI's 74HC high-speed CMOS logic family, engineered for low-power, high-noise-immunity digital interfacing in industrial, automotive, and communications equipment.
FAQ
What is the maximum supply voltage rating for SN74HC541APW?
The absolute maximum supply voltage (VCC) for SN74HC541APW is +7.0 V, but the recommended operating range is 2.0 V to 6.0 V. Operation above 6.0 V may cause accelerated parametric drift or reliability degradation, and is not guaranteed per datasheet specifications. For sustained reliability in production systems, maintain VCC ≤ 6.0 V with proper decoupling.
Does SN74HC541APW support 3.3 V logic interfacing?
Yes, SN74HC541APW fully supports 3.3 V logic interfacing: its VIH threshold is 2.0 V (min) at VCC = 3.3 V, and VOL remains ≤ 0.26 V at 6 mA sink current. Input clamp diodes also permit safe connection to 5 V signals when series current-limiting resistors are used - making SN74HC541APW ideal for bridging 3.3 V MCU domains to 5 V peripherals.
How do OE1 and OE2 interact in SN74HC541APW?
In SN74HC541APW, OE1 and OE2 are OR-connected internally: if either OE1 or OE2 is driven LOW, all eight outputs (Y0–Y7) enter high-impedance state. Both must be HIGH for outputs to reflect their respective A0–A7 inputs. This dual-enable architecture allows flexible bus arbitration - for example, OE1 can serve as system-wide enable while OE2 acts as local module reset.
What is the typical propagation delay of SN74HC541APW at 5 V supply?
At VCC = 5.0 V and CL = 15 pF, the typical propagation delay (tpd) of SN74HC541APW is 10 ns. Measured from input transition (10% to 90%) to output transition (10% to 90%), this value ensures timing closure in 50 MHz synchronous bus designs with adequate setup/hold margin. Delays increase predictably at lower VCC or higher capacitive loads.
Is SN74HC541APW RoHS compliant and halogen-free?
Yes, SN74HC541APW is RoHS compliant (per EU Directive 2011/65/EU) and halogen-free, meeting IPC-4101D/126 requirements. The TSSOP20 package (SOT360-1) uses matte tin lead finish and green molding compound. Full material declarations and certificate of compliance are available from Texas Instruments' Quality & Environmental page upon request.
SN74HC541APW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
SN74HC541APW FAQ
1.How can I place an order for SN74HC541APW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74HC541APW 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 SN74HC541APW reliable?
The price and inventory of SN74HC541APW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74HC541APW is usually 5 days.
3.What payment methods are accepted for SN74HC541APW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74HC541APW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74HC541APW?
SN74HC541APW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74HC541APW 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 SN74HC541APW?
For technical support, including SN74HC541APW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74HC541APW requirements.
6.How does Aetrix verify that SN74HC541APW is sourced from the original manufacturer or authorized distributors?
All SN74HC541APW 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 SN74HC541APW meets industry standards.
7.What is the process for return or replacement of SN74HC541APW?
All SN74HC541APW units undergo pre-shipment inspection (PSI). If there is an issue with SN74HC541APW, 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 SN74HC541APW part is unused and in its original packaging.
Return procedure for SN74HC541APW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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