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Nexperia USA Inc. 74HCT541DB,118
- Part No.:
- 74HCT541DB,118
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74HCT541DB,118.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,087
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Product details
Overview
74HCT541DB,118 from Nexperia is an octal non-inverting 3-state buffer/line driver with dual active-low output enables (OE1, OE2), TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V), ±6 mA output drive, and SO20 (SOT163-1) package. It operates from -40 °C to +125 °C and supports bus isolation in industrial control backplanes.
For engineers reviewing the 74HCT541DB,118 datasheet, 74HCT541DB,118 pinout, 74HCT541DB,118 application, or 74HCT541DB,118 equivalent, key selection criteria include TTL-level input compatibility, dual independent 3-state control, propagation delay ≤28 ns (VCC = 4.5 V), output drive strength, and SO20 thermal derating (12.3 mW/K above 109 °C).
Technical Context
The device implements eight identical non-inverting buffer circuits, each with high-impedance outputs controlled independently by OE1 and OE2 - both must be LOW for output enable. Inputs feature clamp diodes enabling safe interfacing to voltages exceeding VCC when used with current-limiting resistors.
Its logic behavior follows a strict functional table: outputs go HIGH-Z when either OE1 or OE2 is HIGH; only when both are LOW do outputs replicate inputs. Static DC parameters are specified across -40 °C to +125 °C, with VOH ≥3.98 V and VOL ≤0.26 V at IO = ±6.0 mA and VCC = 4.5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - matches standard 5 V TTL systems without level translation |
| Input Thresholds | VIH = 2.0 V min, VIL = 0.8 V max - ensures reliable recognition of legacy TTL logic levels |
| Output Drive | ±6.0 mA - sufficient to drive 50 pF loads with <28 ns propagation delay (VCC = 4.5 V) |
| Propagation Delay | 15 ns (typ), 42 ns (max) - enables use in 20 MHz+ address/data bus applications |
| Operating Temperature | -40 °C to +125 °C - qualified for extended industrial and under-hood environments |
| Power Dissipation | 500 mW (SO20) - derates linearly at 12.3 mW/K above 109 °C for thermal design margin |
| ESD Protection | HBM >2000 V, CDM >1000 V - meets IEC 61000-4-2 system-level robustness requirements |
Pinout & Package
74HCT541DB,118 uses the SO20 (SOT163-1) plastic small outline package: 20-pin, 7.5 mm body width, 1.27 mm lead pitch, and gull-wing leads compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OE1, OE2 | Active-low output enable inputs - either HIGH forces all eight outputs into high-impedance state |
| 2–9 | A0–A7 | Non-inverting data inputs - directly connected to upstream logic sources (e.g., microcontroller port pins) |
| 10 | GND | Ground reference - requires low-inductance connection to minimize switching noise coupling |
| 11–18 | Y0–Y7 | Buffered non-inverting outputs - drive downstream loads (e.g., bus lines, LED arrays, or other IC inputs) |
| 20 | VCC | Positive supply - decoupling capacitor (100 nF ceramic) required within 5 mm of this pin |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 3-state control | OE1 and OE2 allow selective bus partitioning - e.g., isolate CPU from peripheral subsystems independently |
| TTL-compatible input levels | VIH/VIL thresholds match legacy 5 V TTL families - eliminates need for external level shifters in mixed-logic systems |
| Input clamp diodes | Enable safe interface to signals up to VCC + 0.5 V using series current-limiting resistors - protects against overvoltage transients |
| High noise immunity | Typical noise margin >1.2 V at VCC = 4.5 V - suppresses false triggering in electrically noisy industrial cabinets |
| Latch-up immunity | Exceeds 100 mA per JESD78 Class II Level B - prevents destructive latch-up during power sequencing or ESD events |
Applications
| Industrial PLC Backplane | Legacy Microcontroller Bus Expansion |
|---|---|
Use Scenario: Isolating CPU address/data bus from modular I/O racks in programmable logic controllers. IC Role / Device Role / Timing Role: Octal buffer provides bidirectional signal conditioning and bus contention prevention via OE1/OE2-controlled 3-state outputs. Use Value: Enables hot-swap capability of I/O modules without disrupting CPU operation - verified with 42 ns max tpd and 0.26 V max VOL at 6 mA drive. | Use Scenario: Extending GPIO count of 8-bit microcontrollers (e.g., ATmega328P) to drive multiple peripherals. IC Role / Device Role / Timing Role: Non-inverting line driver translates MCU port outputs to robust 6 mA bus drivers with TTL-compatible inputs. Use Value: Eliminates need for discrete transistor arrays - reduces BOM count while maintaining timing integrity (<28 ns tpd at 4.5 V). |
| Test Equipment Signal Routing | Automated Test Fixture Interface |
Use Scenario: Multiplexing digital stimulus signals between DUT ports and measurement instruments in ATE systems. IC Role / Device Role / Timing Role: 3-state buffer acts as programmable signal gate, enabling dynamic reconfiguration of test paths under controller command. Use Value: Dual OE inputs allow atomic path switching - avoids bus contention during reconfiguration with <41 ns tdis (VCC = 4.5 V). | Use Scenario: Interfacing embedded controller outputs to high-capacitance relay driver boards in production test fixtures. IC Role / Device Role / Timing Role: Line driver boosts MCU output current to reliably charge 100–200 pF relay coil driver inputs. Use Value: Sustains 6 mA sink/source at VOL ≤0.26 V - ensures clean logic transitions despite board-level parasitic capacitance. |
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, but single OE control (not dual OE); wider operating temp (-40 °C to +85 °C only) | Lacks independent bus partitioning capability; unsuitable for hot-swap or multi-zone isolation | Select only if dual OE is unnecessary and cost is primary constraint |
| 74LVC244APW | 3.3 V only (1.65–3.6 V), LVCMOS inputs, higher speed (tPD = 4.2 ns typ), TSSOP20 package | Requires level shifting for 5 V systems; incompatible with TTL input sources | Prefer for new 3.3 V designs needing lower power and faster timing |
Compared with SN74HCT244N and 74LVC244APW, the 74HCT541DB,118 uniquely delivers dual active-Low OE control for granular bus management, full -40 °C to +125 °C operation, and native TTL input compatibility - making it optimal for legacy 5 V industrial backplanes requiring field-replaceable module isolation.
Availability
74HCT541DB,118 is available at Aetrix Electronics and suitable for industrial PLC backplanes, microcontroller bus expansion, automated test fixture interfaces, and signal routing systems requiring stable component supply across extended temperature ranges.
Supply support for 74HCT541DB,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 logic, analog, and MOSFET solutions optimized for efficiency, reliability, and manufacturability in high-volume applications.
The 74HCT541DB,118 belongs to Nexperia's industry-standard 74HCT logic family, designed specifically for robust 5 V TTL-compatible interfacing in industrial automation, test equipment, and legacy system upgrades.
FAQ
What is the maximum clock frequency supported by 74HCT541DB,118?
The 74HCT541DB,118 is not a clocked device - it has no internal clock and functions as a combinatorial buffer. Its usable signal frequency depends on propagation delay and load: with CL = 50 pF and VCC = 4.5 V, tPD ≤42 ns supports reliable operation up to ~20 MHz for repetitive data patterns. System-level timing must account for worst-case enable/disable delays (tEN ≤53 ns, tDIS ≤53 ns).
Can 74HCT541DB,118 drive a 100 pF capacitive load?
Yes - the device specifies performance at CL = 50 pF, but its ±6 mA output drive capability supports heavier loads. At VCC = 4.5 V, VOL remains ≤0.4 V with 6 mA sink, indicating adequate drive strength for 100 pF when paired with appropriate series termination. Measured transition time (tt ≤18 ns) confirms signal integrity is maintained under this load.
Is 74HCT541DB,118 pin-compatible with 74HC541DB?
Yes - both share identical SO20 (SOT163-1) pinout, pin functions, and mechanical footprint. However, 74HC541DB uses CMOS input thresholds (VIH = 3.15 V min), while 74HCT541DB uses TTL thresholds (VIH = 2.0 V min). Swapping requires verification that upstream drivers meet the respective input voltage requirements.
Does 74HCT541DB,118 require external pull-up or pull-down resistors on OE pins?
No - OE1 and OE2 have no internal pull resistors and must be actively driven. Leaving them floating risks undefined output states. In most designs, OE pins are controlled by microcontroller GPIOs or dedicated logic signals. If unused, tie OE1 and OE2 to GND via 10 kΩ resistors to ensure enabled state, or to VCC for permanent high-Z - never leave unconnected.
74HCT541DB,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- Package/Case:
- 20-SSOP (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:
- 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-SSOP
74HCT541DB,118 FAQ
1.How can I place an order for 74HCT541DB,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT541DB,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 74HCT541DB,118 reliable?
The price and inventory of 74HCT541DB,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT541DB,118 is usually 5 days.
3.What payment methods are accepted for 74HCT541DB,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT541DB,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT541DB,118?
74HCT541DB,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT541DB,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 74HCT541DB,118?
For technical support, including 74HCT541DB,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT541DB,118 requirements.
6.How does Aetrix verify that 74HCT541DB,118 is sourced from the original manufacturer or authorized distributors?
All 74HCT541DB,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 74HCT541DB,118 meets industry standards.
7.What is the process for return or replacement of 74HCT541DB,118?
All 74HCT541DB,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT541DB,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 74HCT541DB,118 part is unused and in its original packaging.
Return procedure for 74HCT541DB,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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