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Texas Instruments SN74AHC541DW
- Part No.:
- SN74AHC541DW
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74AHC541DW.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,645
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Product details
Overview
SN74AHC541DW 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 output-enable inputs (OE1/OE2), 20-pin SOIC (DW) package, ±25mA output drive per channel, and propagation delays as low as 3.5ns at 5V. It is used in PC motherboard I/O expansion and server memory subsystems.
For engineers reviewing the SN74AHC541DW datasheet, SN74AHC541DW pinout, SN74AHC541DW application, or SN74AHC541DW equivalent, this page delivers verified electrical specs, SOIC-20 terminal mapping, real-world use cases in computing infrastructure, and validated alternative parts for design continuity and sourcing resilience.
Technical Context
The SN74AHC541DW implements eight independent noninverting buffers, each with a two-input AND-gated 3-state control (OE1/OE2 active-low). When either OE input is high, the corresponding Y output enters high-impedance state - enabling bidirectional bus control without external logic.
Its AHC logic family ensures CMOS-level compatibility, overvoltage-tolerant inputs (up to 5.5V), slow-edge-rate design (≤20 ns/V at 5V) to suppress output ringing, and latch-up immunity exceeding 250mA per JESD17. Operating range spans –40°C to +125°C with supply voltage from 2V to 5.5V.
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 5.5V inputs to lower VCC rails. |
| Output Drive | ±25 mA per output - sufficient for driving moderate-capacitance PCB traces and TTL/CMOS loads without external buffers. |
| tPLH/tPHL (5V) | 3.5 ns typical (CL = 15 pF) - enables high-speed data routing in memory address and control buses up to ~100 MHz. |
| IOZ (Off-State Leakage) | ±2.5 µA max - ensures minimal bus leakage during 3-state disable, critical for low-power standby modes. |
| Input Voltage Tolerance | VI up to 5.5 V regardless of VCC - allows direct connection to 5V logic even when operating at 3.3V or 2.5V. |
| ESD Rating (HBM) | ±2000 V - meets industrial handling requirements and reduces risk of field failure during assembly. |
| Operating Temperature | –40°C to +125°C - qualified for extended-temperature industrial and telecom infrastructure applications. |
Pinout & Package
SN74AHC541DW uses a 20-pin SOIC (DW) package measuring 12.80 mm × 10.3 mm (body: 12.80 mm × 7.50 mm), with gull-wing leads and standard JEDEC MO-002AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OE1, OE2 | Active-low output enable controls for two groups of four channels - enables partial bus isolation. |
| 2–9 | A1–A8 | Noninverting input terminals - accept 5.5V-tolerant logic signals for address/data staging. |
| 10 | GND | Ground reference - must be low-impedance and decoupled near VCC pin for noise suppression. |
| 11–18 | Y1–Y8 | 3-state buffered outputs - drive bus lines with controlled edge rates to minimize EMI and overshoot. |
| 20 | VCC | Power supply input - requires local 0.1 µF ceramic bypass capacitor placed adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Wide VCC range (2V–5.5V) | Enables interoperability across 2.5V, 3.3V, and 5V domains without level shifters. |
| Overvoltage-tolerant inputs | Accepts 5.5V inputs at any valid VCC - simplifies interface to legacy 5V peripherals. |
| Slow-edge-rate outputs | Δt/Δv ≤ 20 ns/V at 5V - reduces signal integrity issues like ringing and crosstalk on long traces. |
| Dual 3-state enable (OE1/OE2) | Allows independent control of two 4-bit groups - supports segmented bus arbitration and power gating. |
| Latch-up immunity >250 mA | Meets JESD17 - ensures robustness against transient current faults in noisy industrial environments. |
Applications
| PC Motherboard I/O Expansion | Server Memory Address Buffering |
|---|---|
|
Use Scenario: Expanding legacy ISA or LPC bus interfaces on modern ATX motherboards with mixed-voltage peripherals. IC Role / Device Role / Timing Role: Noninverting buffer isolating CPU-side address/control signals from add-in card logic while maintaining timing integrity. Use Value: Enables reliable 3.3V/5V signal translation without external level shifters and suppresses ringing on 10+ cm trace runs. |
Use Scenario: Driving DDR SDRAM address/command lines in dual-CPU rack servers where trace capacitance exceeds 30 pF. IC Role / Device Role / Timing Role: Octal buffer amplifying weak microcontroller or memory controller outputs to meet setup/hold timing under load. Use Value: Delivers sub-8ns propagation delay at 5V with ±25mA drive - meets JEDEC tDS/tDH margins for DDR2/DDR3 address latching. |
| Network Switch Control Plane | Industrial PLC I/O Module |
|
Use Scenario: Isolating FPGA configuration and management bus signals (I²C, SPI, JTAG) from backplane transceivers in 1U switches. IC Role / Device Role / Timing Role: 3-state buffer enabling dynamic bus sharing between management MCU and FPGA during firmware updates. Use Value: Dual OE pins allow staggered enable/disable sequencing - prevents bus contention during hot-swap transitions. |
Use Scenario: Interfacing 24V discrete I/O signals to 3.3V ARM-based PLC controllers via optocoupler input stages. IC Role / Device Role / Timing Role: Level-translating buffer converting isolated digital inputs into clean CMOS logic levels for processor GPIO. Use Value: 5.5V-tolerant inputs accept optocoupler collector voltages directly; 125°C rating supports convection-cooled enclosures. |
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 |
|---|---|---|---|
| SN74AHCT541DW | CMOS input thresholds (VIH = 2.0V min @ 4.5V); identical pinout and drive strength. | Better compatibility with TTL-output sources; slightly higher ICC (40 µA vs 20 µA). | Choose when interfacing legacy 5V TTL logic; not suitable for sub-3.3V operation. |
| 74LVC541APW | Lower VCC range (1.65V–3.6V); 32mA drive; smaller TSSOP-20 package (6.5mm × 6.4mm). | Optimized for portable/embedded 3.3V-only systems; lacks 5.5V input tolerance. | Prefer for space-constrained, battery-powered designs requiring <3.6V operation only. |
Compared with SN74AHC541DW, SN74AHCT541DW offers TTL-compatible inputs but sacrifices low-voltage operation, while 74LVC541APW reduces footprint and power but eliminates 5V-system interoperability - selection depends on voltage domain alignment and board area constraints.
Availability
SN74AHC541DW is available at Aetrix Electronics and suitable for PC motherboard I/O expansion, server memory subsystems, and industrial PLC I/O modules requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for SN74AHC541DW 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 heritage in high-reliability logic families.
The SN74AHC541DW belongs to TI's AHC advanced high-speed CMOS logic series, engineered for low-noise, mixed-voltage bus interfacing in computing, communications, and industrial control systems.
FAQ
What is the maximum output current per pin for SN74AHC541DW?
The SN74AHC541DW supports ±25 mA continuous output current per Y pin, with a total device limit of ±75 mA across all outputs. This rating applies across the full operating temperature range (–40°C to +125°C) and ensures safe drive capability into typical PCB trace and capacitive loads without thermal derating.
Does SN74AHC541DW support 5V-tolerant inputs when VCC = 3.3V?
Yes, SN74AHC541DW accepts input voltages up to 5.5 V regardless of VCC setting - including at 3.3 V. This overvoltage tolerance allows direct connection to 5V logic sources without external level-shifting circuitry, simplifying mixed-voltage system design.
What is the recommended power supply decoupling for SN74AHC541DW?
TI recommends placing a 0.1 µF ceramic capacitor between VCC (pin 20) and GND (pin 10), located as close as possible to the SN74AHC541DW package. For systems with high-frequency switching noise, adding a 4.7 µF bulk capacitor nearby further stabilizes rail integrity during simultaneous output transitions.
How does the dual OE architecture of SN74AHC541DW improve bus management?
The SN74AHC541DW's separate OE1 and OE2 inputs allow independent control of two 4-bit channel groups (Y1–Y4 and Y5–Y8). This enables segmented bus arbitration, partial power-down, and glitch-free handshaking - critical in multi-master systems like network switch control planes where full-bus disable is unnecessary.
Is SN74AHC541DW suitable for automotive applications?
SN74AHC541DW is rated for –40°C to +125°C operation and meets JESD17 latch-up immunity, but it is not AEC-Q100 qualified. It is appropriate for under-hood industrial or telecom equipment with similar thermal/stress profiles, but not for safety-critical automotive ECUs unless validated per OEM requirements.
SN74AHC541DW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHC
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- 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:
- 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
SN74AHC541DW FAQ
1.How can I place an order for SN74AHC541DW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHC541DW 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 SN74AHC541DW reliable?
The price and inventory of SN74AHC541DW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHC541DW is usually 5 days.
3.What payment methods are accepted for SN74AHC541DW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AHC541DW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74AHC541DW?
SN74AHC541DW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHC541DW 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 SN74AHC541DW?
For technical support, including SN74AHC541DW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHC541DW requirements.
6.How does Aetrix verify that SN74AHC541DW is sourced from the original manufacturer or authorized distributors?
All SN74AHC541DW 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 SN74AHC541DW meets industry standards.
7.What is the process for return or replacement of SN74AHC541DW?
All SN74AHC541DW units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHC541DW, 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 SN74AHC541DW part is unused and in its original packaging.
Return procedure for SN74AHC541DW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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