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Nexperia USA Inc. 74HCT541PW,118
- Part No.:
- 74HCT541PW,118
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74HCT541PW,118.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:73,914
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Product details
Overview
74HCT541PW,118 from Nexperia is an octal non-inverting 3-state buffer/line driver in TSSOP20 package, operating from 4.5 V to 5.5 V with TTL-compatible inputs, 6 mA output drive capability, and -40 °C to +125 °C temperature range - used for bidirectional bus interfacing in industrial control backplanes and legacy parallel I/O expansion.
For engineers reviewing the 74HCT541PW,118 datasheet, 74HCT541PW,118 pinout, 74HCT541PW,118 application, or 74HCT541PW,118 equivalent, key selection criteria include dual active-low output enables (OE1/OE2), 15 ns typical propagation delay at 4.5 V, 3-state leakage < ±5 μA, input clamp diodes for overvoltage tolerance, and JEDEC JESD7A compliance.
Technical Context
This device implements eight identical non-inverting buffer circuits, each with independent output enable control via two shared active-low OE inputs. Its TTL-level input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5 V) ensure compatibility with legacy 5 V logic families while maintaining CMOS power efficiency.
The 3-state output architecture supports bus-sharing applications by enabling high-impedance isolation when either OE1 or OE2 is HIGH. Input clamp diodes allow safe interfacing to signals exceeding VCC, and latch-up immunity exceeds 100 mA per JESD78 Class II Level B.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures stable operation across standard 5 V rail tolerances |
| Propagation Delay | 15 ns typ @ VCC = 4.5 V, CL = 50 pF - enables reliable timing in 33 MHz parallel bus systems |
| Output Drive | ±6.0 mA @ VCC = 4.5 V - sufficient to drive 10 LSTTL loads or 50 pF traces |
| Input Thresholds | VIH = 2.0 V min, VIL = 0.8 V max - guarantees interoperability with 5 V TTL outputs |
| 3-State Leakage | ±5.0 μA max @ VCC = 5.5 V - minimizes bus contention current during disable |
| Operating Temp | -40 °C to +125 °C - qualified for extended industrial and under-hood embedded use |
| Power Dissipation | 500 mW max (derated above 100 °C) - supports continuous operation in compact TSSOP20 layout |
Pinout & Package
TSSOP20 plastic thin shrink small outline package (SOT360-1), 20-pin, 4.4 mm body width, 0.65 mm pitch, exposed pad not present - optimized for high-density PCB layouts with thermal performance derated linearly at 10.0 mW/K above 100 °C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OE1, OE2 | Active-low output enable inputs - either HIGH forces all Yn outputs into high-impedance state |
| 2–9 | A0–A7 | Data inputs - non-inverting logic path to corresponding Yn outputs |
| 10 | GND | Ground reference - return path for all internal circuitry and output currents |
| 11–18 | Y0–Y7 | 3-state buffered outputs - mirror A0–A7 when both OEs are LOW |
| 20 | VCC | Positive supply - powers internal logic and output drivers; must be decoupled locally |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent output enables | OE1 and OE2 provide flexible bus arbitration - either can disable all outputs without affecting input logic state |
| TTL-compatible input thresholds | VIH ≥ 2.0 V and VIL ≤ 0.8 V at 5 V supply - eliminates need for level shifters when interfacing with legacy 5 V microcontrollers |
| Input clamp diodes | Enable safe connection to voltages up to VCC + 0.5 V - permits robust interface to hot-pluggable or mismatched voltage domains |
| High noise immunity | Typical noise margin > 1.2 V at VCC = 5 V - suppresses false triggering in electrically noisy industrial environments |
| Latch-up immunity | Exceeds 100 mA per JESD78 Class II Level B - prevents destructive latch-up during transient overvoltage events |
Applications
| Industrial Backplane Interface | Legacy Parallel Port Expansion |
|---|---|
Use Scenario: Isolating and driving address/data buses between PLC CPU modules and I/O expansion racks. IC Role / Device Role / Timing Role: Non-inverting 3-state buffer providing direction-controlled signal conditioning and bus contention prevention. Use Value: Dual OE inputs allow synchronized enable/disable of all eight lines during bus arbitration cycles, reducing setup/hold timing violations. | Use Scenario: Extending GPIO count on microcontroller-based test equipment using parallel printer port protocols. IC Role / Device Role / Timing Role: Level-shifting buffer translating MCU GPIO logic to 5 V TTL-compatible bus signals. Use Value: TTL input thresholds eliminate external pull-ups or translators, simplifying design and lowering BOM cost. |
| Microcontroller Bus Driver | Memory-Mapped Peripheral Interface |
Use Scenario: Driving 8-bit data bus between ARM Cortex-M4 and external SRAM or FPGA configuration memory. IC Role / Device Role / Timing Role: Output driver with controlled rise/fall times (5–12 ns) minimizing signal integrity issues on 4-layer PCB traces. Use Value: 6 mA drive strength sustains signal integrity over 10 cm trace lengths with 50 pF load, avoiding need for active termination. | Use Scenario: Interfacing 8-bit peripheral registers (e.g., ADC status, DAC control) to a 16-bit microprocessor data bus. IC Role / Device Role / Timing Role: Directional buffer isolating peripheral logic from main system bus during read/write cycles. Use Value: 15 ns propagation delay ensures setup time compliance for 33 MHz bus clocks, supporting real-time sensor feedback loops. |
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 |
|---|---|---|---|
| SN74HCT244N | Same function, DIP-20 package, higher ICC (160 μA max), no input clamps | Through-hole mounting only; lacks overvoltage-tolerant inputs | Select for prototyping or legacy through-hole designs where board space is unconstrained |
| 74LVC244APW | Lower VCC range (1.65–3.6 V), 32 mA drive, CMOS inputs, smaller TSSOP20 footprint | Not TTL-compatible; requires level translation for 5 V systems | Select for modern low-voltage mixed-signal systems where power efficiency and density outweigh 5 V compatibility |
Compared with SN74HCT244N and 74LVC244APW, the 74HCT541PW,118 uniquely balances 5 V TTL interoperability, industrial temperature range, and surface-mount density - making it optimal for retrofitting legacy 5 V bus architectures with space-constrained PCBs.
Availability
74HCT541PW,118 is available at Aetrix Electronics and suitable for industrial backplane interfaces, legacy parallel port expansions, and microcontroller bus driver applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74HCT541PW,118 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 delivering high-performance, reliable discrete, logic, and MOSFET devices with focus on efficiency, reliability, and miniaturization for industrial, automotive, and computing markets.
The 74HCT series targets industrial and legacy-system interfacing, emphasizing TTL compatibility, wide temperature operation, and robustness in electrically noisy environments - directly addressing needs of programmable logic controllers and field-deployed instrumentation.
FAQ
What is the maximum clock frequency supported by 74HCT541PW,118 in a bus application?
The 74HCT541PW,118 does not operate on a clock; it is asynchronous. Its 15 ns typical propagation delay at 4.5 V supports reliable operation in parallel bus systems up to approximately 33 MHz (based on 2× delay margin), provided trace lengths and loading remain within specification limits for signal integrity.
Can OE1 and OE2 be tied together for single-enable operation?
Yes - OE1 and OE2 may be connected to a common control signal. The functional table confirms that a HIGH on either OE input places all outputs in high-impedance state, so tying them together preserves correct 3-state behavior while simplifying routing and reducing GPIO usage on the controller side.
Does 74HCT541PW,118 require external pull-up resistors on its inputs?
No - the device has no internal pull-ups. However, external pull-ups are unnecessary unless the driving source is open-drain or high-impedance during idle states. Inputs are TTL-compatible and will correctly interpret floating inputs as HIGH only if leakage paths are controlled; best practice is to terminate unused inputs to VCC or GND.
How does the input clamp diode affect interfacing with 12 V signals?
The input clamp diodes limit voltage to VCC + 0.5 V. Applying 12 V without current limiting risks exceeding the ±20 mA absolute maximum clamp current, causing damage. A series current-limiting resistor (e.g., 1 kΩ minimum at 12 V) is mandatory to restrict clamp current to safe levels while preserving logic thresholds.
74HCT541PW,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 6mA, 6mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
74HCT541PW,118 FAQ
1.How can I place an order for 74HCT541PW,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT541PW,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 74HCT541PW,118 reliable?
The price and inventory of 74HCT541PW,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT541PW,118 is usually 5 days.
3.What payment methods are accepted for 74HCT541PW,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT541PW,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT541PW,118?
74HCT541PW,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT541PW,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 74HCT541PW,118?
For technical support, including 74HCT541PW,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT541PW,118 requirements.
6.How does Aetrix verify that 74HCT541PW,118 is sourced from the original manufacturer or authorized distributors?
All 74HCT541PW,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 74HCT541PW,118 meets industry standards.
7.What is the process for return or replacement of 74HCT541PW,118?
All 74HCT541PW,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT541PW,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 74HCT541PW,118 part is unused and in its original packaging.
Return procedure for 74HCT541PW,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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