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Texas Instruments SN74AHC541DWR
- Part No.:
- SN74AHC541DWR
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74AHC541DWR.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:685
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Product details
Overview
SN74AHC541DWR from Texas Instruments is an octal noninverting buffer/driver with 3-state outputs, designed for bus line driving and memory address register buffering in 2V–5.5V systems. It features dual active-low output-enable inputs (OE1, OE2), 8-bit noninverted data path, ±25 mA output drive per channel, and operates across –40°C to 125°C. Used in PC motherboard I/O expansion and server memory interface logic.
For engineers reviewing the SN74AHC541DWR datasheet, SN74AHC541DWR pinout, SN74AHC541DWR application, or SN74AHC541DWR equivalent, key selection criteria include 3-state timing (tPLZ/tPHZ ≤12 ns at 5 V), SOIC-20 package compatibility, input overvoltage tolerance up to 5.5 V, and thermal resistance RθJA = 81.1°C/W for reliable operation in high-density industrial PCB layouts.
Technical Context
The SN74AHC541DWR implements two independent 4-bit groups (A1–A4/Y1–Y4 and A5–A8/Y5–Y8), each controlled by its own active-low output-enable input (OE1, OE2). Its CMOS AHC logic family delivers balanced rise/fall times and low dynamic power consumption (ICC ≤ 40 µA at 5.5 V).
Each output enters high-impedance state when either OE1 or OE2 is high; outputs are enabled only when both enables are low. Input transition rate is specified at 100 ns/V (3.3 V) and 20 ns/V (5 V), supporting clean signal integrity in noise-sensitive applications without external termination.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 5.5 V - supports mixed-voltage system interfacing and down-translation from 5.5 V inputs to lower VCC rails. |
| Output Drive | ±25 mA per output - sufficient to drive standard TTL loads and moderate-capacitance buses without external buffers. |
| Propagation Delay | tPLH/tPHL ≤ 6 ns (5 V, CL = 15 pF) - enables use in sub-100 MHz synchronous bus interfaces with tight timing budgets. |
| 3-State Enable Time | tPZH/tPLZ ≤ 8 ns (5 V, CL = 15 pF) - ensures fast bus release for time-critical shared-data-path arbitration. |
| Input Voltage Tolerance | VI up to 5.5 V regardless of VCC - allows direct connection to 5 V logic even when operating at 3.3 V or 2.5 V. |
| Operating Temperature | –40°C to +125°C - qualified for industrial and extended-temperature embedded control and networking equipment. |
| ESD Rating | HBM ±2000 V - meets JEDEC JS-001 requirements for robust handling in automated assembly and field-replaceable modules. |
Pinout & Package
SN74AHC541DWR 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.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OE1, OE2 | Active-low output-enable controls for Group 1 (Y1–Y4) and Group 2 (Y5–Y8); both must be low for output assertion. |
| 2–9 | A1–A8 | Noninverting input terminals for 8-bit data path; accept 5.5 V max regardless of VCC level. |
| 10 | GND | Ground reference for all internal circuitry and output current return path. |
| 11–18 | Y1–Y8 | 3-state noninverting outputs; high-impedance when OE1 or OE2 is high; drive ±25 mA when enabled. |
| 20 | VCC | Positive supply rail (2–5.5 V); powers internal logic and output stages; requires local 0.1 µF bypass capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Wide Supply Range | 2 V to 5.5 V operation enables interoperability between 2.5 V, 3.3 V, and 5 V logic domains without level shifters. |
| Overvoltage-Tolerant Inputs | Inputs withstand up to 5.5 V independent of VCC - simplifies mixed-supply board design and eliminates need for input clamping diodes. |
| Controlled Edge Rates | Slow edge rates (100 ns/V @ 3.3 V) reduce output ringing and EMI in high-speed digital interconnects. |
| Low Quiescent Current | ICC ≤ 40 µA at 5.5 V - minimizes standby power in always-on industrial controllers and battery-backed systems. |
| Thermal Performance | RθJA = 81.1°C/W (SOIC-20) - supports continuous operation at full drive in compact enclosures without forced air cooling. |
Applications
| PC Motherboard I/O Expansion | Industrial PLC Backplane Interface |
|---|---|
|
Use Scenario: Buffering parallel address/data lines between microcontroller and legacy ISA-style peripheral slots. IC Role / Device Role / Timing Role: Noninverting 3-state buffer isolating CPU address bus from multiple peripheral decoders during bus arbitration. Use Value: Dual OE control allows independent gating of upper/lower address nibbles, reducing contention risk and enabling hot-swap-compatible slot enable sequencing. |
Use Scenario: Driving opto-isolated input modules on modular I/O backplanes in factory automation systems. IC Role / Device Role / Timing Role: Level-translating buffer converting 3.3 V FPGA GPIO outputs to 5 V-tolerant signals for downstream isolation drivers. Use Value: Input overvoltage tolerance eliminates external level-shifter ICs, reducing BOM count and layout area in space-constrained DIN-rail mount controllers. |
| Network Switch Management Bus | Medical Diagnostic Equipment Control Logic |
|
Use Scenario: Isolating SMBus/I²C-compatible management interfaces from ASIC-based switch fabric controllers. IC Role / Device Role / Timing Role: Bidirectional bus buffer with 3-state outputs preventing signal contention during multi-master arbitration cycles. Use Value: Low propagation delay (≤6 ns) and tight skew (<1.5 ns) maintain timing margins for 100 kHz–400 kHz management bus protocols under worst-case voltage/temperature conditions. |
Use Scenario: Interfacing FPGA-configured control logic to analog front-end multiplexers and ADC/DAC reference switches in ultrasound imaging subsystems. IC Role / Device Role / Timing Role: Glue logic buffer ensuring clean, glitch-free enable signals for precision analog switching with <10 ns setup/hold compliance. Use Value: Guaranteed 125°C operation and ±2000 V HBM ESD rating support long-term reliability in sealed, fanless medical enclosures exposed to electrostatic environments. |
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 |
|---|---|---|---|
| SN74AHCT541DWR | CMOS-to-TTL compatible; VIH = 2 V min at 4.5 V VCC, unlike AHC's 3.85 V threshold - better suited for 5 V-only systems interfacing legacy TTL. | Requires 4.5–5.5 V VCC; not usable below 4.5 V - unsuitable for 3.3 V or mixed-voltage designs where SN74AHC541DWR operates at 2–5.5 V. | Select SN74AHCT541DWR only when interfacing strictly with 5 V TTL loads and guaranteed VCC ≥ 4.5 V; otherwise retain SN74AHC541DWR for broader voltage flexibility. |
| 74LVC541APW,118 | NXP LVC variant; 1.65–3.6 V VCC range, 24 mA drive, smaller TSSOP-20 package (6.5 × 6.4 mm), higher speed (tPD ≤ 4.2 ns @ 3.3 V). | Limited to ≤3.6 V operation - cannot interface to 5 V inputs without external protection; incompatible with 5 V legacy peripherals supported by SN74AHC541DWR. | Choose 74LVC541APW,118 for space-constrained 3.3 V-only applications requiring faster timing; retain SN74AHC541DWR when 5 V tolerance, wider voltage range, or SOIC-20 footprint is required. |
Compared with SN74AHCT541DWR and 74LVC541APW,118, the SN74AHC541DWR uniquely balances 2–5.5 V operation, 5.5 V input tolerance, SOIC-20 manufacturability, and industrial temperature range - making it the preferred choice for mixed-voltage industrial and telecom infrastructure where voltage domain bridging and long-term supply continuity are critical.
Availability
SN74AHC541DWR is available at Aetrix Electronics and suitable for PC motherboard I/O expansion, industrial PLC backplane interface, and network switch management bus applications requiring stable component supply across extended product lifecycles.
Supply support for SN74AHC541DWR 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.
The SN74AHC541DWR belongs to TI's AHC logic family, engineered for low-power, wide-voltage-range bus interface applications where signal integrity, voltage translation, and industrial-grade reliability are essential.
FAQ
What is the maximum output current per pin for SN74AHC541DWR?
The SN74AHC541DWR supports ±25 mA continuous output current per Y pin (Y1–Y8) under recommended operating conditions. Total device output current must not exceed ±75 mA across all active outputs. Exceeding these limits risks parametric shift or permanent damage, especially at elevated temperatures.
Can SN74AHC541DWR safely interface 5 V inputs while operating at 3.3 V VCC?
Yes. The SN74AHC541DWR inputs tolerate voltages up to 5.5 V regardless of VCC level, enabling direct connection to 5 V logic sources while powered at 3.3 V or 2.5 V. This eliminates external level shifters in mixed-voltage designs and is explicitly confirmed in Section 5.3 (Recommended Operating Conditions) of the datasheet.
What is the thermal resistance (RθJA) of SN74AHC541DWR in its SOIC-20 package?
The SN74AHC541DWR in SOIC-20 (DW) package has a junction-to-ambient thermal resistance (RθJA) of 81.1°C/W, measured per JEDEC JESD51 standards. This value assumes standard 2-layer PCB layout with typical copper pour; actual performance improves with enhanced thermal vias and ground plane coverage.
How does the dual output-enable architecture of SN74AHC541DWR improve system design?
The SN74AHC541DWR provides two independent active-low output-enable inputs (OE1, OE2), allowing separate control of Y1–Y4 and Y5–Y8 groups. This enables selective bus segmentation, reduces contention during partial bus updates, and supports staggered enable sequencing in hot-plug or power-gated subsystems - a capability not found in single-OE octal buffers.
Is SN74AHC541DWR suitable for automotive applications?
The SN74AHC541DWR is rated for –40°C to +125°C operation and meets JEDEC ESD standards (HBM ±2000 V), but it is not AEC-Q100 qualified. For automotive applications requiring qualification, TI offers automotive-grade variants like SN74AHC541QPWRQ1; SN74AHC541DWR remains appropriate for industrial, telecom, and computing systems meeting those temperature and reliability requirements.
SN74AHC541DWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHC
- 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:
- 2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
SN74AHC541DWR FAQ
1.How can I place an order for SN74AHC541DWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHC541DWR 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 SN74AHC541DWR reliable?
The price and inventory of SN74AHC541DWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHC541DWR is usually 5 days.
3.What payment methods are accepted for SN74AHC541DWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AHC541DWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74AHC541DWR?
SN74AHC541DWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHC541DWR 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 SN74AHC541DWR?
For technical support, including SN74AHC541DWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHC541DWR requirements.
6.How does Aetrix verify that SN74AHC541DWR is sourced from the original manufacturer or authorized distributors?
All SN74AHC541DWR 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 SN74AHC541DWR meets industry standards.
7.What is the process for return or replacement of SN74AHC541DWR?
All SN74AHC541DWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHC541DWR, 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 SN74AHC541DWR part is unused and in its original packaging.
Return procedure for SN74AHC541DWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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