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Texas Instruments SN74AHC541DWRE4
- Part No.:
- SN74AHC541DWRE4
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74AHC541DWRE4.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,559
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Product details
Overview
SN74AHC541DWRE4 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 packaging, ±25mA output drive per channel, and propagation delays as low as 3.5ns at 5V. Used in PC motherboard I/O expansion and server memory subsystems.
For engineers reviewing the SN74AHC541DWRE4 datasheet, SN74AHC541DWRE4 pinout, SN74AHC541DWRE4 application, or SN74AHC541DWRE4 equivalent, key selection criteria include its dual 3-state control architecture, 5.5V-tolerant inputs, low-output-ring characteristics, thermal resistance (RθJA = 81.1°C/W), and SOIC-20 package compatibility with industrial temperature range (–40°C to 125°C).
Technical Context
The SN74AHC541DWRE4 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 and OE2). Its CMOS AHC logic family ensures rail-to-rail output swing, low static current (ICC ≤ 40µA), and noise immunity via hysteresis-free inputs with VIH/VIL thresholds defined across VCC = 2V–5.5V.
Functional mode operation follows a two-input AND gate logic on OE pins: any OE high forces corresponding Y outputs into high-impedance state. Inputs tolerate up to 5.5V regardless of VCC, enabling level translation from 5V logic to lower-voltage buses. Edge rates are intentionally slowed (Δt/Δv = 20 ns/V at 5V) to suppress output ringing under light capacitive loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2V to 5.5V - supports mixed-voltage system interfacing and brown-out resilience down to 2V. |
| Output Drive | ±25mA per output - sufficient for driving 50pF loads with <8ns propagation delay at 5V, but limits trace length without termination. |
| Propagation Delay | 3.5ns (tPLH/tPHL, CL=15pF, VCC=5V) - enables timing-critical address/data buffering in sub-100MHz parallel buses. |
| Input Voltage Tolerance | Up to 5.5V - allows direct connection to legacy 5V logic without external level shifters when VCC = 3.3V or 2.5V. |
| 3-State Leakage | ±2.5µA (IOZ, VCC=5.5V) - ensures minimal bus leakage during disable, critical for low-power standby modes. |
| ESD Rating | ±2000V HBM - meets standard handling requirements for automated assembly in Class 1B ESD environments. |
| Operating Temp | –40°C to 125°C - qualified for industrial and extended-temperature embedded computing applications. |
Pinout & Package
SN74AHC541DWRE4 uses a 20-pin SOIC (DW) package measuring 12.80mm × 10.3mm (body: 12.80mm × 7.50mm), 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); tied high disables all outputs. |
| 2–9 | A1–A8 | Noninverting data inputs; accept 0–5.5V regardless of VCC, enabling voltage translation. |
| 10 | GND | Ground reference for logic and power; must be low-impedance for noise suppression. |
| 11–18 | Y1–Y8 | 3-state buffered outputs; high-impedance when OE1/OE2 = high; drive ±25mA max. |
| 20 | VCC | Supply pin; bypass with 0.1µF ceramic capacitor near package for stable switching performance. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 3-state control | OE1 and OE2 allow selective disabling of two 4-bit groups-enables partial bus isolation without full device shutdown. |
| 5.5V-tolerant inputs | Accepts 5V signals at any valid VCC (2V–5.5V), eliminating external level shifters in mixed-supply systems. |
| Controlled edge rate | Δt/Δv = 20 ns/V at 5V reduces output ringing and EMI, easing layout for unterminated stubs on backplanes. |
| Low quiescent current | ICC ≤ 40µA at VCC = 5.5V minimizes standby power in always-on I/O hubs and peripheral controllers. |
| High latch-up immunity | Exceeds 250mA per JESD17 - prevents destructive latch-up during transient overvoltage events on PCBs. |
Applications
| PC Motherboard I/O Expansion | Industrial PLC Backplane Interface |
|---|---|
Use Scenario: Buffering ISA/LPC bus address lines between southbridge and legacy peripherals (Super I/O, BIOS flash). IC Role / Device Role / Timing Role: Noninverting octal buffer with group-selectable 3-state control isolates address latches during DMA cycles. Use Value: Dual OE pins enable dynamic partitioning of 8-bit address segments, reducing contention during concurrent peripheral access. | Use Scenario: Interfacing microcontroller GPIOs to modular I/O cards in DIN-rail mounted PLC chassis. IC Role / Device Role / Timing Role: Bus driver translating 3.3V MCU outputs to 5V-compatible fieldbus modules while maintaining signal integrity. Use Value: 5.5V-tolerant inputs eliminate level-shifter ICs; slow edges suppress ringing on long ribbon cables (>30cm). |
| Server Memory Subsystem | Wearable Health Sensor Hub |
Use Scenario: Driving SPD EEPROM address lines and control signals on DDR4/DDR5 DIMM modules. IC Role / Device Role / Timing Role: Low-skew buffer isolating SMBus controller from multiple memory module address decoders. Use Value: Propagation delay matching (tPLH/tPHL ≤ 3.5ns) ensures setup/hold compliance across 8-bit address paths at 100kHz SMBus clock. | Use Scenario: Multiplexing sensor data streams (ECG, SpO₂, accelerometer) onto shared SPI bus in compact wearable PCBs. IC Role / Device Role / Timing Role: 3-state octal driver enabling time-division sharing of SPI MISO/MOSI lines among heterogeneous sensors. Use Value: SOIC-20 footprint fits tight board space; ±25mA drive supports daisy-chained pull-up networks on multi-sensor buses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LV541APWR | Lower VCC range (1.65V–5.5V); higher ICC (100µA); 3.3V-optimized propagation (4.2ns @ 3.3V) | Better suited for ultra-low-voltage portable designs; less robust at 2V operation | Select when primary supply is 1.8V/2.5V and 2V minimum operation is not required. |
| 74AHC541PW,118 | NXP variant in TSSOP-20; identical electrical specs; different marking and reel packaging | No functional difference; qualification and traceability aligned to NXP's automotive-grade flow | Choose for dual-sourcing where TI and NXP supply chain diversification is mandated. |
Compared with SN74LV541APWR, SN74AHC541DWRE4 delivers superior 2V operational margin and lower static power, while 74AHC541PW,118 offers identical functionality with alternate logistics-neither is pin-compatible with SN74AHC541DWRE4 due to differing SOIC vs TSSOP footprints.
Availability
SN74AHC541DWRE4 is available at Aetrix Electronics and suitable for PC motherboards, industrial PLC backplanes, and server memory subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74AHC541DWRE4 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 expertise in high-reliability interface ICs.
The SN74AHC541 series belongs to TI's advanced high-speed CMOS logic portfolio, engineered for robust bus interfacing in computing, communications, and industrial control systems where signal integrity and voltage flexibility are critical.
FAQ
What is the maximum output current per pin for SN74AHC541DWRE4?
The SN74AHC541DWRE4 supports a continuous output current of ±25mA per Y pin, with a total device limit of ±75mA across all outputs. Exceeding these values risks parametric shift or permanent damage. This rating applies across the full operating temperature range (–40°C to 125°C) and is validated per TI's production test flow.
Does SN74AHC541DWRE4 support 5V-tolerant inputs when VCC = 3.3V?
Yes, SN74AHC541DWRE4 inputs tolerate voltages up to 5.5V regardless of VCC setting. When VCC = 3.3V, A1–A8 accept 5V logic levels without damage or clamping, enabling seamless interfacing with legacy 5V peripherals-no external level shifters needed.
What is the recommended power supply decoupling for SN74AHC541DWRE4?
TI recommends a 0.1µF ceramic capacitor placed as close as possible to the VCC (pin 20) and GND (pin 10) pins of SN74AHC541DWRE4. For systems with heavy simultaneous switching, add a bulk 4.7µF tantalum or aluminum electrolytic capacitor within 1 inch of the SOIC package to stabilize rail droop during 3-state transitions.
How does the dual output-enable architecture of SN74AHC541DWRE4 improve bus management?
SN74AHC541DWRE4's separate OE1 and OE2 inputs allow independent control of Y1–Y4 and Y5–Y8 groups. This enables segmented bus arbitration-e.g., disabling only memory-mapped I/O while keeping configuration registers active-reducing contention and simplifying timing in multi-peripheral systems.
Is SN74AHC541DWRE4 compatible with lead-free reflow processes?
Yes, SN74AHC541DWRE4 is RoHS-compliant with NIPDAU lead finish and rated for MSL Level-1 (unlimited floor life) at peak reflow temperatures up to 260°C. It meets JEDEC J-STD-020 requirements for standard Pb-free soldering profiles without preconditioning.
SN74AHC541DWRE4 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:
- Discontinued at Digi-Key
- 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
SN74AHC541DWRE4 FAQ
1.How can I place an order for SN74AHC541DWRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHC541DWRE4 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 SN74AHC541DWRE4 reliable?
The price and inventory of SN74AHC541DWRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHC541DWRE4 is usually 5 days.
3.What payment methods are accepted for SN74AHC541DWRE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AHC541DWRE4 transactions.
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4.How is shipping managed for SN74AHC541DWRE4?
SN74AHC541DWRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHC541DWRE4 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 SN74AHC541DWRE4?
For technical support, including SN74AHC541DWRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHC541DWRE4 requirements.
6.How does Aetrix verify that SN74AHC541DWRE4 is sourced from the original manufacturer or authorized distributors?
All SN74AHC541DWRE4 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 SN74AHC541DWRE4 meets industry standards.
7.What is the process for return or replacement of SN74AHC541DWRE4?
All SN74AHC541DWRE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHC541DWRE4, 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 SN74AHC541DWRE4 part is unused and in its original packaging.
Return procedure for SN74AHC541DWRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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