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Texas Instruments SN74AHCT541DWR
- Part No.:
- SN74AHCT541DWR
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74AHCT541DWR.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:8,181
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Product details
Overview
SN74AHCT541DWR 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 digital systems. It features TTL-compatible inputs, ±8 mA output drive capability, 6.5 ns typical propagation delay (CL = 15 pF), and operates across –40°C to +125°C. Its dual 3-state enable inputs (OE1, OE2) support independent control of two 4-bit groups.
For engineers reviewing the SN74AHCT541DWR datasheet, SN74AHCT541DWR pinout, SN74AHCT541DWR application, or SN74AHCT541DWR equivalent, key selection criteria include 3-state bus contention management, TTL-level input compatibility in mixed-voltage logic interfaces, low static current (4 µA typical ICC), and SOIC-20 package suitability for industrial PCB layouts requiring thermal reliability and hand-soldering accessibility.
Technical Context
The SN74AHCT541DWR implements eight independent non-inverting buffers, each with a 2-input AND-based 3-state control gate (active-low OE1/OE2). When either enable is high, the corresponding four outputs enter high-impedance state-enabling bidirectional bus sharing without external isolation.
Its CMOS AHCT logic family ensures 5-V operation with TTL input thresholds (VIL = 0.8 V, VIH = 2.0 V), rail-to-rail output swing (VOH ≥ 3.8 V at IOL = 8 mA), and robust ESD protection (±2000 V HBM, ±1000 V CDM), making it suitable for noise-prone industrial control backplanes and legacy system upgrades.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage (VCC) | 4.5 V to 5.5 V - Ensures stable operation under industrial 5-V rail tolerances (±10%) without level-shifting. |
| Output Drive (IOL/IOH) | ±8 mA - Sufficient to drive 50-pF loads with <9.5 ns propagation delay, supporting moderate-speed bus loading. |
| Propagation Delay (tPLH/tPHL) | 6.2 ns (CL = 50 pF) - Enables reliable timing in 33-MHz synchronous bus interfaces with margin. |
| Input Thresholds | VIL = 0.8 V, VIH = 2.0 V - Guarantees interoperability with standard TTL outputs without interface logic. |
| Quiescent Current (ICC) | 4 µA typical - Minimizes standby power in always-on industrial controllers and sensor hubs. |
| ESD Rating (HBM) | ±2000 V - Meets IEC 61000-4-2 Level 2 requirements for board-level handling and field deployment. |
| Operating Temperature | –40°C to +125°C - Qualified for under-hood automotive modules and industrial motor drives without derating. |
Pinout & Package
SN74AHCT541DWR uses a 20-pin SOIC (DW) package measuring 12.80 mm × 10.3 mm (body: 12.80 mm × 7.50 mm), RoHS-compliant with NiPdAu lead finish and MSL Level-1 rating (260°C reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OE1, OE2 | Active-low 3-state enables - OE1 controls Y1–Y4; OE2 controls Y5–Y8; independent gating prevents bus contention. |
| 2–9 | A1–A8 | Buffer inputs - TTL-compatible; must be tied to VCC or GND if unused to prevent floating-induced shoot-through. |
| 10 | GND | Ground reference - Shared return path for all logic and output currents; requires low-inductance PCB connection. |
| 11–18 | Y1–Y8 | Non-inverting 3-state outputs - High-impedance when OE = high; full rail swing (0 V / VCC) when enabled. |
| 20 | VCC | Power supply - Requires local 0.1 µF ceramic bypass capacitor placed ≤2 mm from pin to suppress switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | Accepts 0.8 V / 2.0 V thresholds - Eliminates need for level translators when interfacing with legacy 74LS or microcontroller GPIOs. |
| Dual independent 3-state enables | OE1/OE2 control separate 4-bit groups - Enables interleaved memory addressing or segmented data bus arbitration. |
| Low dynamic power | 12 pF power dissipation capacitance - Reduces switching current in high-frequency clock distribution paths. |
| Robust latch-up immunity | >250 mA per JESD17 - Prevents destructive latch-up during transient overvoltage events on shared bus lines. |
| Industrial temperature range | –40°C to +125°C operation - Supports deployment in programmable logic controllers (PLCs) and motor drive I/O modules. |
Applications
| Industrial PLC Backplane Interface | Legacy Microcontroller Bus Expansion |
|---|---|
|
Use Scenario: Interfacing a 16-bit microcontroller address/data bus to multiple peripheral modules via a shared 8-bit parallel backplane. IC Role / Device Role / Timing Role: Octal buffer isolates MCU outputs from backplane capacitance; 3-state enables allow time-multiplexed access by multiple slaves. Use Value: Prevents signal degradation and timing skew across 15-cm traces while maintaining TTL-compatible voltage levels at all nodes. |
Use Scenario: Expanding GPIO count of an 8-bit MCU (e.g., PIC16F) to drive 8 discrete indicators and 4 relay drivers simultaneously. IC Role / Device Role / Timing Role: Non-inverting buffer translates MCU logic levels to higher-current outputs; OE pins enable software-controlled output grouping. Use Value: Delivers 8 mA per output - sufficient to directly drive LEDs and small relays without external transistors. |
| Memory Address Register Buffering | Test Equipment Signal Conditioning |
|
Use Scenario: Driving 12-bit address lines of SRAM or EPROM in a test fixture where layout constraints limit trace length and impedance control. IC Role / Device Role / Timing Role: Low-skew buffer ensures simultaneous arrival of address bits at memory device inputs; SOIC package simplifies manual rework. Use Value: 1 ns max skew between Y1–Y8 outputs guarantees setup/hold compliance for 25-ns memory access cycles. |
Use Scenario: Conditioning TTL-level trigger signals from multiple instruments (oscilloscope, logic analyzer, function generator) into a centralized FPGA acquisition system. IC Role / Device Role / Timing Role: Input filtering and drive strengthening stage; 3-state outputs allow FPGA to override or inject test patterns onto shared trigger bus. Use Value: ±2000 V HBM ESD rating protects against accidental discharge during lab cable swaps and probe contact. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC541APW | Lower VCC range (1.65–3.6 V); 32 mA drive; 3.5 ns tPD (CL = 50 pF) | Targets modern low-voltage systems (e.g., 3.3-V FPGAs); not 5-V tolerant | Select for 3.3-V domains requiring higher speed and drive; avoid in 5-V legacy systems. |
| 74ACT541SCX | Same 4.5–5.5 V range; 24 mA drive; 5.5 ns tPD; higher ICC (20 µA) | Better noise immunity (higher VIH/VIL margins); suited for high-noise factory floors | Prefer when driving long cables or noisy loads; accept higher quiescent power for robustness. |
Compared with SN74AHCT541DWR, SN74LVC541APW offers superior speed and drive in low-voltage designs but lacks 5-V tolerance, while 74ACT541SCX delivers stronger noise immunity and output current at the cost of higher static power-making SN74AHCT541DWR optimal for cost-sensitive 5-V industrial upgrades balancing performance, compatibility, and efficiency.
Availability
SN74AHCT541DWR is available at Aetrix Electronics and suitable for industrial PLC backplanes, legacy microcontroller bus expansion, and memory address register buffering requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74AHCT541DWR 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 in industrial-grade interface ICs and automotive-qualified components.
The SN74AHCT541DWR belongs to TI's 74AHCT logic family, engineered specifically for seamless integration between TTL and CMOS systems in harsh-environment applications demanding reliability, wide temperature operation, and proven interoperability.
FAQ
What is the maximum operating temperature for SN74AHCT541DWR?
The SN74AHCT541DWR is rated for continuous operation from –40°C to +125°C ambient temperature. This specification is validated per JEDEC JESD78 and applies to the SOIC-20 package (DW) used in SN74AHCT541DWR, enabling use in engine control units, industrial motor drives, and outdoor telecom equipment without thermal derating.
Does SN74AHCT541DWR support 3.3-V input logic levels?
No, SN74AHCT541DWR does not reliably recognize 3.3-V logic levels as valid high inputs. Its VIH threshold is specified at 2.0 V minimum (at VCC = 4.5 V), but proper TTL compatibility requires ≥2.0 V for HIGH and ≤0.8 V for LOW. A 3.3-V CMOS output may not guarantee sufficient noise margin; level translation is recommended for mixed-voltage interfaces involving SN74AHCT541DWR.
How should unused inputs be handled on SN74AHCT541DWR?
All unused inputs (A1–A8, OE1, OE2) on SN74AHCT541DWR must be tied to either VCC or GND-never left floating. Floating inputs cause undefined output states, increased ICC, and potential oscillation. TI recommends tying unused enables to VCC (via pull-up) to ensure outputs remain in high-Z, and unused A inputs to GND to minimize leakage and noise coupling.
What is the recommended bypass capacitor for SN74AHCT541DWR?
Texas Instruments specifies a 0.1 µF ceramic capacitor placed within 2 mm of the VCC pin (pin 20) and GND (pin 10) for SN74AHCT541DWR. This value targets high-frequency switching noise suppression; for systems with multiple SN74AHCT541DWR devices or high di/dt loads, paralleling with a 1 µF tantalum capacitor further stabilizes bulk supply impedance.
Is SN74AHCT541DWR pin-compatible with other 74-series octal buffers?
Yes, SN74AHCT541DWR shares identical pinout and function mapping with industry-standard 20-pin octal buffers including SN74LS541, SN74ALS541, and SN74F541 in SOIC-20 (DW) packaging. The A1–A8 inputs, Y1–Y8 outputs, OE1/OE2 enables, VCC, and GND align positionally and electrically-enabling drop-in replacement in existing 5-V designs without PCB modification.
SN74AHCT541DWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- 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-SOIC
SN74AHCT541DWR FAQ
1.How can I place an order for SN74AHCT541DWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHCT541DWR 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 SN74AHCT541DWR reliable?
The price and inventory of SN74AHCT541DWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHCT541DWR is usually 5 days.
3.What payment methods are accepted for SN74AHCT541DWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AHCT541DWR transactions.
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4.How is shipping managed for SN74AHCT541DWR?
SN74AHCT541DWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHCT541DWR 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 SN74AHCT541DWR?
For technical support, including SN74AHCT541DWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHCT541DWR requirements.
6.How does Aetrix verify that SN74AHCT541DWR is sourced from the original manufacturer or authorized distributors?
All SN74AHCT541DWR 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 SN74AHCT541DWR meets industry standards.
7.What is the process for return or replacement of SN74AHCT541DWR?
All SN74AHCT541DWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHCT541DWR, 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 SN74AHCT541DWR part is unused and in its original packaging.
Return procedure for SN74AHCT541DWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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