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Texas Instruments SN74HC541DWE4
- Part No.:
- SN74HC541DWE4
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74HC541DWE4.pdf
- Description:
- IC BUFFER NON-INVERT 6V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,143
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Product details
Overview
SN74HC541DWE4 from Texas Instruments is an octal non-inverting buffer/line driver with 3-state outputs, designed for bus interface and signal isolation in digital systems. It operates from 2 V to 6 V, delivers ±6 mA output drive at 5 V, exhibits typical propagation delay of 10 ns (VCC = 6 V, CL = 50 pF), and consumes ≤80 µA ICC. It is used in PC motherboard I/O expansion, server backplane buffering, and LED segment drivers.
For engineers reviewing the SN74HC541DWE4 datasheet, SN74HC541DWE4 pinout, SN74HC541DWE4 application, or SN74HC541DWE4 equivalent, key selection criteria include its dual active-low output-enable control (OE1/OE2), data-flow-through pinout (inputs on one side, outputs on the other), 3-state bus-hold capability, and compatibility with LSTTL loads (up to 15 units).
Technical Context
The SN74HC541DWE4 implements eight independent non-inverting buffers, each with true logic output and high-impedance state controlled by a two-input NOR gate formed by OE1 and OE2. Both enables must be low to activate outputs; either high forces all Y1–Y8 into high-Z.
Its CMOS design ensures rail-to-rail input thresholds (VIH/VIL specified across 2–6 V), low input current (≤1 µA), and output drive sufficient for direct bus loading or driving 15 LSTTL inputs. The SOIC-20 package supports standard PCB layout with opposing I/O sides for minimized trace crossovers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 6 V - supports mixed-voltage system interfacing (e.g., 3.3 V logic driving 5 V buses) |
| Output Drive (5 V) | ±6 mA - sufficient to directly drive 15 LSTTL loads without external buffers |
| Propagation Delay (tpd) | 10 ns typical (VCC = 6 V, CL = 50 pF) - enables reliable operation in sub-100 MHz digital timing paths |
| ICC (Max) | 80 µA at VCC = 6 V - ultra-low static power for battery-backed or energy-sensitive applications |
| Input Leakage Current | ≤1 µA - prevents unintended logic transitions when inputs are pulled via high-value resistors |
| 3-State Enable Logic | Active-low dual OE (OE1 ∧ OE2) - provides fail-safe high-Z default during power-up/power-down if either enable floats high |
Pinout & Package
SN74HC541DWE4 is housed in a 20-pin SOIC (DW) package measuring 12.80 mm × 7.50 mm, with gull-wing leads and standard JEDEC MS-013 outline. Its data-flow-through pinout places all eight inputs (A1–A8) on pins 2–9 and all eight outputs (Y1–Y8) on pins 11–18, enabling straight-layer PCB routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OE1, OE2 | Active-low output enable inputs - both must be low for Y1–Y8 to reflect A1–A8; either high forces high-impedance state |
| 2–9 | A1–A8 | Buffer input terminals - accept CMOS- or TTL-level signals; no internal pull-ups/pull-downs |
| 10 | GND | Ground reference - must be connected to system common; decoupling capacitor required near pin |
| 11–18 | Y1–Y8 | Non-inverting 3-state outputs - source/sink up to ±6 mA; high-Z when OE1 or OE2 is high |
| 20 | VCC | Positive supply - requires local 0.1-µF ceramic bypass capacitor between pin 20 and pin 10 |
Key Features
| Feature | Design Value |
|---|---|
| Data-flow-through pinout | Inputs (A1–A8) and outputs (Y1–Y8) on opposite package edges - eliminates layer jumps and reduces crosstalk in dense PCB layouts |
| Dual active-low output enables | OE1 and OE2 form a NOR function - allows hierarchical bus control (e.g., chip-select + direction-enable coordination) |
| Wide supply voltage range | 2 V to 6 V operation - interoperable across 2.5 V, 3.3 V, and 5 V logic domains without level shifters |
| High-current 3-state outputs | ±6 mA drive at 5 V - drives LSTTL loads directly and sustains bus contention without latch-up |
| Low power consumption | 80 µA max ICC - suitable for always-on subsystems in servers and embedded controllers |
Applications
| PC Motherboard I/O Expansion | Server Backplane Buffering |
|---|---|
|
Use Scenario: Isolating legacy parallel port or ISA-bus signals from modern southbridge logic while maintaining signal integrity across long traces. IC Role / Device Role / Timing Role: Non-inverting buffer with 3-state control acts as bi-directional bus isolator, enabling hot-swap-capable peripheral attachment. Use Value: Prevents signal reflections and ground bounce by matching impedance and providing clean enable/disable timing (ten/tdis ≤26 ns at 6 V). |
Use Scenario: Driving differential clock or control signals across multi-slot backplanes in 1U rack servers. IC Role / Device Role / Timing Role: Line driver amplifies and fans out control signals (e.g., reset, interrupt) to multiple blade modules with matched skew. Use Value: ±6 mA drive ensures fast edge rates (tt ≤10 ns) and noise margin against EMI in high-density chassis environments. |
| LED Segment Drivers | Industrial PLC I/O Modules |
|
Use Scenario: Sourcing current to 7-segment LED displays in point-of-sale terminals and medical device front panels. IC Role / Device Role / Timing Role: High-current buffer interfaces microcontroller GPIOs to common-anode LED segments, with OE pins synchronized to multiplexing timing. Use Value: 6 mA per output supports bright LED visibility under ambient light without external transistors or heat sinks. |
Use Scenario: Level-shifting and buffering digital I/O signals between field-side sensors/actuators and isolated controller logic in factory automation. IC Role / Device Role / Timing Role: Signal conditioner translates 24 V industrial logic levels (via external resistor dividers) to 3.3 V/5 V MCU-compatible levels with noise immunity. Use Value: Wide 2–6 V supply range accommodates varied internal rail voltages; low ICC minimizes thermal load in sealed 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 |
|---|---|---|---|
| SN74HCT541DWR | CMOS input with TTL-compatible thresholds (VIH = 2 V min); identical pinout and drive strength | Better suited for interfacing with legacy 5 V TTL logic where input noise margins are critical | Select when driving from older 5 V TTL sources; otherwise SN74HC541DWE4 offers lower power and wider VCC range |
| 74LCX541MTCX | Lower VCC range (2.0–3.6 V), higher speed (tpd = 5.5 ns @ 3.3 V), smaller TSSOP-20 package | Optimized for low-voltage portable systems; not 5 V tolerant on inputs or outputs | Choose for space-constrained 3.3 V-only designs; avoid if 5 V bus compatibility or mixed-voltage operation is required |
Compared with SN74HCT541DWR and 74LCX541MTCX, SN74HC541DWE4 uniquely balances wide supply flexibility (2–6 V), robust 5 V tolerance, and ultra-low static power-making it the preferred choice for general-purpose bus buffering where voltage domain bridging and reliability outweigh marginal speed gains.
Availability
SN74HC541DWE4 is available at Aetrix Electronics and suitable for PC motherboard I/O expansion, server backplane buffering, and industrial PLC I/O modules requiring stable component supply across extended product lifecycles.
Supply support for SN74HC541DWE4 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 over 50 years of innovation in high-reliability digital ICs.
SN74HC541DWE4 belongs to TI's HC logic family, engineered for low-power, wide-voltage-operation digital interfacing in computing, industrial, and communications infrastructure equipment.
FAQ
What is the maximum output current per channel for SN74HC541DWE4?
The SN74HC541DWE4 provides ±6 mA output drive per channel at VCC = 5 V, as specified in the Electrical Characteristics table (Section 6.7). This rating applies under steady-state DC conditions and supports direct connection to 15 LSTTL loads. Exceeding this current may cause VOL/VOH degradation or thermal stress.
Does SN74HC541DWE4 support 3.3 V operation?
Yes, SN74HC541DWE4 fully supports 3.3 V operation within its 2 V to 6 V supply range. At VCC = 3.3 V, it maintains VIH ≤ 2.0 V and VIL ≥ 0.99 V (per Section 6.3), ensuring reliable interfacing with 3.3 V CMOS and mixed-signal microcontrollers without level translation.
How do OE1 and OE2 interact in SN74HC541DWE4?
In SN74HC541DWE4, OE1 and OE2 form a logical NOR gate: outputs Y1–Y8 are enabled only when both OE1 and OE2 are low. If either OE1 or OE2 is high, all outputs enter high-impedance state. This dual-enable structure allows flexible bus arbitration and power sequencing control.
What is the typical propagation delay of SN74HC541DWE4 at 5 V?
At VCC = 5 V and CL = 50 pF, SN74HC541DWE4 exhibits a typical propagation delay (tpd) of 12 ns, as listed in Section 6.10 (Switching Characteristics, SN74HC541). This value represents the delay from A-input transition to corresponding Y-output transition under standard test conditions.
Is SN74HC541DWE4 pin-compatible with other packages in the SN74HC541 family?
Yes, SN74HC541DWE4 shares identical pin configuration and function mapping with all SN74HC541 variants (e.g., SN74HC541DBR, SN74HC541N), including SSOP, PDIP, TSSOP, and SOIC packages. All use the same 20-pin layout with OE1/OE2, A1–A8, Y1–Y8, GND, and VCC assigned to identical positions.
SN74HC541DWE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- 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:
- 7.8mA, 7.8mA
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
SN74HC541DWE4 FAQ
1.How can I place an order for SN74HC541DWE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74HC541DWE4 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 SN74HC541DWE4 reliable?
The price and inventory of SN74HC541DWE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74HC541DWE4 is usually 5 days.
3.What payment methods are accepted for SN74HC541DWE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74HC541DWE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74HC541DWE4?
SN74HC541DWE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74HC541DWE4 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 SN74HC541DWE4?
For technical support, including SN74HC541DWE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74HC541DWE4 requirements.
6.How does Aetrix verify that SN74HC541DWE4 is sourced from the original manufacturer or authorized distributors?
All SN74HC541DWE4 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 SN74HC541DWE4 meets industry standards.
7.What is the process for return or replacement of SN74HC541DWE4?
All SN74HC541DWE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74HC541DWE4, 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 SN74HC541DWE4 part is unused and in its original packaging.
Return procedure for SN74HC541DWE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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