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Texas Instruments SN74AHCT541N
- Part No.:
- SN74AHCT541N
- Manufacturer:
- Texas Instruments
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
SN74AHCT541N.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:395
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Product details
Overview
SN74AHCT541N from Texas Instruments is an octal non-inverting buffer/driver with 3-state outputs, designed for bus line driving and memory address register buffering in 5-V TTL-compatible digital systems. It features dual output-enable inputs (OE1, OE2), ±8 mA output drive capability at VCC = 4.5–5.5 V, and operates across –40°C to 125°C.
For engineers reviewing the SN74AHCT541N datasheet, SN74AHCT541N pinout, SN74AHCT541N application, or SN74AHCT541N equivalent, this page delivers verified electrical specs, functional modes, thermal metrics, and real-world implementation guidance for industrial control, instrumentation, and legacy system upgrades requiring TTL-voltage compatibility and high-impedance bus isolation.
Technical Context
The SN74AHCT541N implements two independent 4-bit groups (A1–A4/Y1–Y4 and A5–A8/Y5–Y8), each controlled by a dedicated active-low output-enable input (OE1, OE2). Its 3-state logic uses a 2-input AND gate with inverted enables: either OE1 or OE2 high forces all eight outputs into high-impedance mode.
It meets TTL input voltage thresholds (VIH = 2 V min, VIL = 0.8 V max), supports 15 pF/50 pF load switching, and delivers tPLH/tPHL ≤ 6.5 ns (CL = 15 pF) and ≤ 9.5 ns (CL = 50 pF) at VCC = 5 V. Latch-up immunity exceeds 250 mA per JESD17, and ESD protection meets ±2000 V HBM and ±1000 V CDM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - Ensures stable operation in standard 5-V logic rails with ±10% tolerance. |
| Output Drive | ±8 mA - Sufficient to drive multiple TTL loads or one CMOS load without external buffering. |
| Propagation Delay | ≤6.5 ns (CL = 15 pF) - Enables reliable timing in 100+ MHz bus applications with tight setup/hold margins. |
| Input Compatibility | TTL-level (VIH ≥ 2 V, VIL ≤ 0.8 V) - Directly interfaces with legacy 74LS/74F logic without level-shifting. |
| Operating Temperature | –40°C to 125°C - Qualified for extended industrial environments including motor drives and power supplies. |
| Power Dissipation | 12 pF typical Cpd - Predictable dynamic power consumption for thermal budgeting in dense PCB layouts. |
| ESD Rating | ±2000 V HBM - Meets IEC 61000-4-2 Level 2 for robust handling in manufacturing and field service. |
Pinout & Package
SN74AHCT541N uses a 20-pin plastic dual in-line package (PDIP-N), with body dimensions 25.40 mm × 6.35 mm and overall footprint 24.33 mm × 9.4 mm. Inputs (A1–A8, OE1, OE2) and outputs (Y1–Y8) are arranged on opposite sides to simplify PCB trace routing and reduce crosstalk.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OE1, OE2 | Active-low output enable controls first and second 4-bit groups independently; tie high to disable corresponding outputs. |
| 2–9 | A1–A8 | Non-inverting data inputs; accept TTL-compatible logic levels and drive Y1–Y8 when respective OE is low. |
| 10 | GND | Ground reference for all internal circuitry and output stage return path; requires low-impedance connection. |
| 11–18 | Y1–Y8 | 3-state buffered outputs; present true A1–A8 values when enabled, high-Z when OE1/OE2 high. |
| 20 | VCC | 5-V supply input; must be bypassed with 0.1 µF ceramic capacitor placed within 5 mm of the pin. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 4-bit groups | Enables selective bus segmentation: OE1 controls Y1–Y4, OE2 controls Y5–Y8 for flexible memory/data bus partitioning. |
| TTL-compatible inputs | Eliminates need for level translators when interfacing with 74LS, 74F, or microcontroller GPIOs operating at 5 V. |
| High-impedance state control | Guaranteed high-Z during power-up/down when OE is pulled high via external resistor, preventing bus contention. |
| Robust latch-up immunity | Exceeds 250 mA per JESD17 - ensures survivability under transient overcurrent events in noisy industrial settings. |
| Low quiescent current | ICC ≤ 40 µA max - minimizes standby power in battery-backed or energy-sensitive subsystems. |
Applications
| Industrial PLC Backplane Interface | Legacy Memory Address Buffering |
|---|---|
|
Use Scenario: Isolating CPU address lines from multiple peripheral modules on a DIN-rail mounted programmable logic controller backplane. IC Role / Device Role / Timing Role: Octal buffer providing bidirectional address bus isolation with independent OE control per module group. Use Value: Prevents signal contention during hot-swap of I/O cards while maintaining TTL-compatible timing margins up to 100 MHz. |
Use Scenario: Driving 16-bit address lines from an 8-bit microcontroller to external SRAM or EPROM in retro-computing hardware. IC Role / Device Role / Timing Role: Non-inverting buffer doubling address bus fanout capacity while preserving setup/hold timing integrity. Use Value: Enables direct interface between modern 5-V MCUs and legacy memory chips without timing degradation or added propagation delay. |
| Test Equipment Signal Routing | Automated Test Fixture Control |
|
Use Scenario: Multiplexing digital stimulus signals across 8 DUT channels in automated boundary-scan test systems. IC Role / Device Role / Timing Role: 3-state driver enabling channel-selective signal injection with precise edge alignment. Use Value: Delivers sub-7 ns propagation delay and <1 ns skew between outputs, critical for synchronized multi-channel pattern generation. |
Use Scenario: Controlling relay banks and LED status indicators in production-line functional testers with shared control bus architecture. IC Role / Device Role / Timing Role: Bus driver isolating microcontroller GPIOs from inductive relay coils and high-current indicator loads. Use Value: ±8 mA drive strength safely switches 5-V relays; high-Z state prevents backfeed during fault conditions or firmware reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HCT541N | Same pinout and function but HCT logic family: higher ICC (max 80 µA vs. 40 µA), slower tPLH/tPHL (≤8 ns vs. ≤6.5 ns @ CL=15pF). | Lower speed margin and higher static power make it less suitable for high-frequency or low-power industrial designs. | Choose SN74AHCT541N for tighter timing budgets and lower quiescent current; select SN74HCT541N only if legacy BOM compatibility is required. |
| 74LVX541M | 3.3-V optimized (VCC = 2.7–3.6 V), not 5-V compatible; different pinout (SOIC-20 only); no PDIP option available. | Cannot replace SN74AHCT541N in 5-V systems without level translation; unsuitable for through-hole prototyping or legacy repair. | Use 74LVX541M only in new 3.3-V designs where board space and power efficiency outweigh compatibility needs. |
Compared with SN74HCT541N and 74LVX541M, the SN74AHCT541N uniquely balances 5-V TTL compatibility, sub-7 ns speed, low ICC, and PDIP availability-making it the optimal choice for industrial upgrades, test fixtures, and mixed-voltage system integration where pin-for-pin replacement and proven reliability are mandatory.
Availability
SN74AHCT541N is available at Aetrix Electronics and suitable for industrial PLC backplanes, legacy memory expansion boards, automated test equipment signal routing, and embedded control panel interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74AHCT541N 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 leader specializing in analog, embedded processing, and logic solutions, with decades of experience delivering high-reliability components for industrial, automotive, and aerospace markets.
The SN74AHCT541N belongs to TI's AHCT logic family, engineered specifically for seamless interoperability with legacy TTL systems while meeting modern robustness standards-including enhanced ESD, latch-up immunity, and extended temperature operation.
FAQ
What is the maximum clock frequency supported by SN74AHCT541N?
The SN74AHCT541N does not operate as a clocked device-it is a combinatorial buffer with no internal clock. Its usable frequency depends on system-level timing constraints. With tPLH/tPHL ≤ 6.5 ns (CL = 15 pF), it supports reliable data transfer up to ~100 MHz in well-designed 5-V bus systems, assuming proper layout and termination.
Can SN74AHCT541N drive LEDs directly?
Yes, SN74AHCT541N can drive standard 5-V LEDs directly: each output provides up to 8 mA sink/source current, sufficient for low-current indicator LEDs (e.g., 2 mA at 1.8 V forward voltage with 390 Ω series resistor). Avoid continuous DC drive above 6 mA per output to maintain thermal safety margin.
Is SN74AHCT541N pin-compatible with SN74LS541?
Yes, SN74AHCT541N is pin-compatible with SN74LS541 in the same PDIP-20 package. Both share identical pin functions (A1–A8, Y1–Y8, OE1, OE2, GND, VCC), enabling drop-in replacement. However, SN74AHCT541N offers superior noise immunity, wider VCC range (4.5–5.5 V vs. 4.75–5.25 V), and guaranteed 125°C operation.
Does SN74AHCT541N require pull-up resistors on OE pins?
Yes-TI recommends tying OE1 and OE2 to VCC via pull-up resistors during power-up/down to ensure outputs remain in high-impedance state and prevent bus contention. Minimum resistor value depends on driver sink capability; 10 kΩ is typical for microcontroller-driven enables, while 1 kΩ suffices for stronger drivers.
What is the thermal resistance (RθJA) of SN74AHCT541N in PDIP package?
The junction-to-ambient thermal resistance RθJA for SN74AHCT541N in PDIP (N) package is 69 °C/W, measured under JEDEC-standard conditions (1-layer board, 1 in² copper pad). This value enables accurate junction temperature estimation: TJ = TA + (RθJA × PD), where PD is total power dissipation.
SN74AHCT541N Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHCT
- Package/Case:
- 20-DIP (0.300", 7.62mm)
- 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:
- 8mA, 8mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 20-PDIP
SN74AHCT541N FAQ
1.How can I place an order for SN74AHCT541N through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHCT541N 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 SN74AHCT541N reliable?
The price and inventory of SN74AHCT541N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHCT541N is usually 5 days.
3.What payment methods are accepted for SN74AHCT541N?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AHCT541N transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74AHCT541N?
SN74AHCT541N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHCT541N 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 SN74AHCT541N?
For technical support, including SN74AHCT541N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHCT541N requirements.
6.How does Aetrix verify that SN74AHCT541N is sourced from the original manufacturer or authorized distributors?
All SN74AHCT541N 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 SN74AHCT541N meets industry standards.
7.What is the process for return or replacement of SN74AHCT541N?
All SN74AHCT541N units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHCT541N, 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 SN74AHCT541N part is unused and in its original packaging.
Return procedure for SN74AHCT541N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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