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Nexperia USA Inc. 74AHCT541D,118
- Part No.:
- 74AHCT541D,118
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74AHCT541D,118.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:7,352
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Product details
Overview
74AHCT541D,118 from Nexperia is an octal 3-state buffer/line driver with dual active-low output enables (OE0, OE1), TTL-compatible input thresholds, 5.5 V overvoltage-tolerant inputs, and SO20 (SOT163-1) package. It operates from 4.5 V to 5.5 V across –40 °C to +125 °C and is used in bidirectional bus interfacing, memory address/data buffering, and level translation between mixed-voltage logic domains.
For engineers reviewing the 74AHCT541D,118 datasheet, 74AHCT541D,118 pinout, 74AHCT541D,118 application, or 74AHCT541D,118 equivalent, key selection criteria include TTL-level input compatibility, dual independent 3-state control, SO20 thermal performance at 125 °C, propagation delay ≤5.5 ns (VCC = 5 V, CL = 15 pF), and overvoltage tolerance enabling safe interfacing with 5.5 V signals on 5 V-supplied systems.
Technical Context
This device implements eight non-inverting buffers with independently controlled 3-state outputs via two active-low enable inputs (OE0, OE1). Each output enters high-impedance state when its associated OE is HIGH, allowing flexible partitioning of the 8-bit bus into two 4-bit groups or full 8-bit control.
Input thresholds are TTL-compatible (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V), while inputs tolerate up to 5.5 V regardless of supply - enabling use as a translator from 5.5 V legacy peripherals to 5 V logic. All inputs feature Schmitt-trigger action for noise immunity on slow or noisy signals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage range | 4.5 V to 5.5 V - Ensures compatibility with standard 5 V TTL and CMOS systems without level-shifting. |
| Propagation delay (tpd) | ≤5.5 ns @ VCC = 5 V, CL = 15 pF - Supports >100 MHz bus operation with tight timing margins. |
| Output drive strength | ±8 mA @ VOH/VOL - Sufficient to drive 50 pF loads and standard TTL fan-out (10) directly. |
| Input voltage tolerance | Up to 5.5 V - Allows safe connection to 5.5 V sources (e.g., legacy microcontrollers, sensors) while powered at 5 V. |
| Operating temperature | –40 °C to +125 °C - Qualified for under-hood automotive, industrial motor control, and high-reliability embedded applications. |
| ESD protection | HBM >2000 V, CDM >1000 V - Robust handling during PCB assembly and field service without additional protection circuitry. |
| Power dissipation | 500 mW max (SO20, Tamb ≤109 °C) - Enables sustained operation in compact enclosures with minimal heatsinking. |
Pinout & Package
74AHCT541D,118 is housed in a plastic small outline package (SO20, SOT163-1) with 20 leads, 7.5 mm body width, and gull-wing leads. The package supports reflow soldering per JEDEC J-STD-020 and provides adequate thermal dissipation for continuous 5 V operation at 125 °C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE0) | Active-low output enable 0 | Controls Y0–Y3; HIGH disables outputs, LOW enables them - enables independent gating of first 4 bits. |
| 2 (VCC) | Positive supply | 5 V nominal supply input; decoupling capacitor must be placed within 5 mm for stable high-speed operation. |
| 3–10 (A0–A7) | Data inputs | Non-inverting inputs for Y0–Y7; Schmitt-triggered for noise rejection on slow-rising signals. |
| 11–18 (Y0–Y7) | Data outputs | 3-state buffered outputs; high-impedance when OE0 or OE1 is HIGH - prevents bus contention. |
| 19 (OE1) | Active-low output enable 1 | Controls Y4–Y7; independent of OE0 - allows split-bus control without external logic. |
| 20 (GND) | Ground reference | 0 V return path; must be low-inductance connection to minimize ground bounce during switching. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 3-state enables | OE0 controls Y0–Y3; OE1 controls Y4–Y7 - eliminates need for external AND gates in segmented bus designs. |
| TTL-compatible input thresholds | VIH ≥ 2.0 V, VIL ≤ 0.8 V @ VCC = 4.5–5.5 V - ensures reliable interfacing with legacy 5 V TTL microcontrollers and FPGAs. |
| Overvoltage-tolerant inputs | Withstands 5.5 V input signals at any VCC (4.5–5.5 V) - enables direct connection to 5.5 V I/O without external clamping diodes. |
| Balanced propagation delays | tpd variation < 1.5 ns across all 8 channels - critical for skew-sensitive parallel data paths like address latching. |
| High noise immunity | Input hysteresis ≥ 0.5 V (Schmitt-trigger) - rejects EMI and crosstalk on long PCB traces or ribbon cables. |
Applications
| Memory Address Buffering | Industrial PLC I/O Expansion |
|---|---|
|
Use Scenario: Buffering 8-bit address lines between a microcontroller and external SRAM or EPROM in an industrial controller. IC Role / Device Role / Timing Role: Non-inverting 3-state buffer providing isolation and drive strength; dual OE pins allow interleaved access to two memory banks. Use Value: Eliminates address bus contention during memory refresh cycles and reduces signal integrity issues caused by capacitive loading on long traces. |
Use Scenario: Interfacing a 5 V FPGA I/O bank to 24 V digital input modules via optocoupler interfaces in a programmable logic controller. IC Role / Device Role / Timing Role: Level-translating buffer translating 5 V logic to 24 V-compatible input conditioning circuits; overvoltage tolerance protects against transient coupling. Use Value: Prevents damage from induced transients on factory-floor wiring while maintaining deterministic setup/hold timing for FPGA sampling. |
| Legacy Peripheral Interface | Test Equipment Signal Routing |
|
Use Scenario: Connecting a modern 5 V microcontroller to a legacy 5.5 V UART transceiver or display controller in medical diagnostic equipment. IC Role / Device Role / Timing Role: Input-tolerant buffer enabling direct interface without external voltage translators; dual OE supports hot-swap detection sequencing. Use Value: Reduces BOM count and board space versus discrete level-shifter solutions while preserving signal edge rates for reliable 115.2 kbps UART operation. |
Use Scenario: Multiplexing 8-channel digital stimulus signals from a test pattern generator to multiple DUT inputs in automated test equipment. IC Role / Device Role / Timing Role: 3-state bus driver enabling dynamic routing of test vectors; low propagation delay (<5.5 ns) ensures sub-10 ns timing resolution. Use Value: Maintains signal fidelity across 50 Ω transmission lines and enables precise synchronization of stimulus edges across parallel channels. |
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 |
|---|---|---|---|
| 74AHCT541PW,118 | TSSOP20 package (4.4 mm width); 10.0 mW/K thermal derating above 100 °C vs. SO20's 12.3 mW/K above 109 °C. | Better suited for space-constrained PCBs; lower thermal mass requires tighter layout control for 125 °C operation. | Select when footprint area is critical and board-level airflow or copper pour can manage thermal rise. |
| SN74AHCT541PWR | Texas Instruments part; identical logic function and DC specs, but HBM ESD rated at 2000 V (same), CDM at 1500 V (higher than Nexperia's 1000 V). | Preferred in high-ESD environments (e.g., handheld test gear); pinout and timing match exactly. | Choose for enhanced CDM robustness in manufacturing or field-replaceable modules where static discharge risk is elevated. |
Compared with 74AHCT541PW,118, the 74AHCT541D,118 offers superior thermal margin at high ambient temperatures due to SO20's higher derating threshold; versus SN74AHCT541PWR, it trades slightly lower CDM immunity for guaranteed Nexperia supply chain continuity and AEC-Q200-aligned qualification testing.
Availability
74AHCT541D,118 is available at Aetrix Electronics and suitable for industrial automation, test instrumentation, and legacy system upgrades requiring stable component supply, extended temperature support, and long-term obsolescence management.
Supply support for 74AHCT541D,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 focused on high-volume, high-reliability logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.
The 74AHCT series targets robust, drop-in replacements for legacy TTL logic with CMOS efficiency - designed specifically for industrial control, factory automation, and infrastructure equipment demanding wide temperature range and noise resilience.
FAQ
Can 74AHCT541D,118 operate reliably at 125 °C ambient?
Yes. The device is fully specified from –40 °C to +125 °C, with static and dynamic parameters validated across this range. The SO20 package delivers 500 mW total power dissipation at ≤109 °C ambient, derating linearly above that point. Thermal design must ensure junction temperature remains below 150 °C under worst-case load and airflow conditions.
What is the maximum input voltage the device tolerates when VCC = 5.0 V?
The inputs are overvoltage tolerant up to 5.5 V regardless of VCC level. This means a 5.5 V signal applied to any A0–A7 or OE pin will not damage the device or cause latch-up, even when VCC is 5.0 V. This capability is explicitly verified per JESD78 Class II Level A latch-up testing (>100 mA).
How does dual output enable improve system design versus single-enable octal buffers?
Dual enables (OE0 for Y0–Y3, OE1 for Y4–Y7) allow independent control of two 4-bit segments without external logic. This enables time-multiplexed bus sharing, staggered enable sequencing for reduced simultaneous switching noise, or fault-isolation where one segment is disabled during diagnostics while the other remains active - reducing system-level complexity and PCB real estate.
Is 74AHCT541D,118 pin-compatible with 74AHC541D,118?
Yes - identical pinout, package, and AC/DC specifications except for input threshold levels. The 74AHC541 uses CMOS thresholds (VIH ≈ 0.7×VCC), while the 74AHCT541 uses TTL thresholds (VIH = 2.0 V min). Swapping them requires verifying source logic family compatibility; otherwise, signal integrity and noise margin may degrade in mixed-logic systems.
74AHCT541D,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74AHCT
- Package/Case:
- 20-SOIC (0.295", 7.50mm 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:
- 8mA, 8mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
74AHCT541D,118 FAQ
1.How can I place an order for 74AHCT541D,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHCT541D,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 74AHCT541D,118 reliable?
The price and inventory of 74AHCT541D,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHCT541D,118 is usually 5 days.
3.What payment methods are accepted for 74AHCT541D,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHCT541D,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AHCT541D,118?
74AHCT541D,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHCT541D,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 74AHCT541D,118?
For technical support, including 74AHCT541D,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHCT541D,118 requirements.
6.How does Aetrix verify that 74AHCT541D,118 is sourced from the original manufacturer or authorized distributors?
All 74AHCT541D,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 74AHCT541D,118 meets industry standards.
7.What is the process for return or replacement of 74AHCT541D,118?
All 74AHCT541D,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHCT541D,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 74AHCT541D,118 part is unused and in its original packaging.
Return procedure for 74AHCT541D,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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