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Texas Instruments SN74HCT541DWE4
- Part No.:
- SN74HCT541DWE4
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74HCT541DWE4.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,700
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Product details
Overview
SN74HCT541DWE4 from Texas Instruments is an octal buffer and line driver IC with 3-state outputs, designed for bus interface and load-driving applications in 5-V TTL-compatible digital systems. It operates from 4.5 V to 5.5 V, delivers ±6 mA output drive at 5 V, exhibits typical propagation delay of 12 ns, and consumes ≤80 µA quiescent current - enabling high-density bus buffering in industrial control and data acquisition systems.
For engineers reviewing the SN74HCT541DWE4 datasheet, SN74HCT541DWE4 pinout, SN74HCT541DWE4 application, or SN74HCT541DWE4 equivalent, key selection criteria include its true-output logic configuration, dual 3-state enable (OE1/OE2) control, data-flow-through pinout for PCB layout optimization, and compatibility with LSTTL loads (up to 15).
Technical Context
The SN74HCT541DWE4 implements eight independent non-inverting buffers, each with high-current 3-state outputs controlled by a dual-input NOR gate (OE1 and OE2). When either enable input is high, all outputs enter high-impedance state - supporting bidirectional bus sharing without external logic.
Its HCT logic family ensures TTL-voltage-level compatibility on inputs while maintaining CMOS power efficiency. The device uses a data-flow-through pinout: all eight inputs (A1–A8) are on one side of the SOIC-20 package, and all eight outputs (Y1–Y8) plus enables (OE1, OE2) and power pins (VCC, GND) are on the opposite side - reducing trace crossovers and simplifying routing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5-V logic rails and tolerant of supply ripple within specification. |
| Output Drive | ±6 mA at 5 V - sufficient to directly drive 15 LSTTL loads or interface with system buses without level-shifting. |
| Propagation Delay | 12 ns typical (5.5 V, CL = 50 pF) - supports medium-speed digital timing in control and instrumentation applications. |
| Quiescent Current | 80 µA max - enables low-static-power operation in always-on or battery-backed subsystems. |
| Input Compatibility | TTL-voltage compatible (VIH = 2 V, VIL = 0.8 V) - interoperable with legacy 74LS and 74F logic families. |
| 3-State Enable Logic | NOR-gated OE1/OE2 - either enable high forces all Y outputs into high-Z, simplifying bus arbitration design. |
Pinout & Package
SN74HCT541DWE4 is housed in a 20-pin SOIC (DW) package measuring 12.80 mm × 7.50 mm with 1.27-mm lead pitch and 2.65-mm maximum height. The package is RoHS-compliant, lead-finished with NiPdAu, and rated MSL Level-1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | Inputs A1–A8 | True logic inputs driving corresponding Y outputs; placed on left side for flow-through layout. |
| 9, 19 | OE1, OE2 | Active-low 3-state enables (NOR logic); either high disables all outputs - supports flexible bus control schemes. |
| 10, 11, 12, 13, 14, 15, 16, 18 | Outputs Y1–Y8 | Non-inverting buffered outputs with ±6 mA drive; placed on right side to minimize signal crossing. |
| 17 | VCC | Positive supply (4.5–5.5 V); requires local 0.1-µF bypass capacitor per TI recommendation. |
| 20 | GND | Ground reference; must be low-impedance connection to support clean switching and noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Data-flow-through pinout | Inputs (A1–A8) and outputs (Y1–Y8) on opposite sides of SOIC-20 package - reduces PCB layer count and improves signal integrity in dense layouts. |
| Dual 3-state enable (OE1/OE2) | NOR-gated control allows either enable signal to independently disable all outputs - simplifies multi-master bus arbitration. |
| TTL-compatible inputs | VIH = 2 V, VIL = 0.8 V at VCC = 4.5–5.5 V - eliminates need for level shifters when interfacing with 74LS/74F logic. |
| Low ICC and IOZ | 80 µA max ICC and 0.5 µA max IOZ - minimizes standby power in systems with multiple buffers and supports long-term reliability. |
| High-current 3-state outputs | ±6 mA drive capability at 5 V - drives 15 LSTTL loads directly, reducing external fanout components and BOM cost. |
Applications
| Industrial PLC I/O Modules | Test Equipment Digital Backplanes |
|---|---|
|
Use Scenario: Isolating and buffering digital I/O signals between microcontroller GPIOs and field-side relay drivers or sensor interfaces in programmable logic controllers. IC Role / Device Role / Timing Role: Octal non-inverting buffer with 3-state control acts as a configurable bus interface, enabling multiplexed read/write access to discrete I/O banks. Use Value: Data-flow-through pinout simplifies PCB routing across multiple I/O channels; ±6 mA drive ensures reliable switching of optocoupler inputs without external transistors. |
Use Scenario: Driving parallel address/data lines between FPGA-based controller and modular instrument cards in automated test equipment backplanes. IC Role / Device Role / Timing Role: True-output octal buffer provides clean signal regeneration and bus contention management via OE1/OE2-controlled 3-state outputs. Use Value: 12 ns typical tpd meets timing budgets for 20-MHz backplane operation; TTL-compatible inputs eliminate level translation between legacy and modern logic families. |
| Embedded Data Acquisition Systems | Legacy System Upgrades |
|
Use Scenario: Interfacing ADC/DAC parallel interfaces with ARM Cortex-M microcontrollers in compact environmental monitoring nodes. IC Role / Device Role / Timing Role: Buffer isolates sensitive analog front-end timing from noisy digital domains while providing 3-state capability for shared data bus operation. Use Value: 80 µA max ICC extends battery life in portable units; SOIC-20 footprint allows drop-in replacement in space-constrained designs. |
Use Scenario: Replacing obsolete 74LS240/74LS244 buffers in aging industrial control panels requiring extended component availability. IC Role / Device Role / Timing Role: Pin-compatible HCT-family upgrade delivering identical logic function, timing, and drive strength with lower power consumption. Use Value: Direct functional equivalence to 'HC240-series devices ensures no firmware or layout changes; RoHS-compliant packaging meets modern compliance requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer and line driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HCT240DWRE4 | Inverting outputs (Y = NOT A); dual 3-state enables; same SOIC-20 package and electrical specs. | Suitable where signal polarity inversion is required (e.g., active-low bus drivers), but not interchangeable without logic redesign. | Select SN74HCT240DWRE4 only if inverting functionality is needed; otherwise, SN74HCT541DWE4 is preferred for true-output applications. |
| SN74LV541APWRE4 | Lower voltage range (2–5.5 V); LV-CMOS technology; 3.3-V optimized; slightly higher tpd (16 ns typ at 3.3 V). | Better suited for mixed-voltage systems with 3.3-V microcontrollers; not recommended for pure 5-V TTL environments due to reduced noise margin. | Choose SN74LV541APWRE4 for 3.3-V or dual-supply designs; retain SN74HCT541DWE4 for legacy 5-V TTL compatibility and tighter timing. |
Compared with SN74HCT240DWRE4 and SN74LV541APWRE4, the SN74HCT541DWE4 uniquely combines true-output logic, strict 5-V TTL compatibility, and optimal 12-ns propagation delay - making it the preferred choice for bus buffering in industrial 5-V control systems where signal polarity and timing precision are critical.
Availability
SN74HCT541DWE4 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, test equipment backplanes, embedded data acquisition systems, and legacy system upgrades requiring stable component supply and long-term lifecycle support.
Supply support for SN74HCT541DWE4 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 90 years of innovation in industrial, automotive, and communications markets.
The SN74HCT541DWE4 belongs to TI's 74HCT logic family - engineered for TTL-compatible operation in 5-V systems, emphasizing robust noise immunity, low power, and seamless integration with legacy digital infrastructure.
FAQ
What is the operating voltage range for SN74HCT541DWE4?
The SN74HCT541DWE4 operates from 4.5 V to 5.5 V. This range ensures compatibility with standard 5-V power rails and accommodates typical supply tolerances in industrial environments. Operation outside this range may cause unreliable switching or damage, as specified in the absolute maximum ratings (–0.5 V to 7 V).
Does SN74HCT541DWE4 support TTL-level inputs?
Yes, SN74HCT541DWE4 features TTL-voltage-compatible inputs: VIH = 2 V (min) and VIL = 0.8 V (max) at VCC = 4.5–5.5 V. This allows direct interfacing with 74LS, 74F, and other legacy TTL families without level-shifting circuitry - a key advantage in system upgrades.
How does the 3-state enable logic work on SN74HCT541DWE4?
The SN74HCT541DWE4 uses a 2-input NOR gate for 3-state control: OE1 and OE2 are active-low enables. If either OE1 or OE2 is driven high, all eight outputs (Y1–Y8) enter high-impedance state. Both must be low for normal buffered output operation - enabling flexible bus arbitration in multi-driver systems.
What is the typical propagation delay of SN74HCT541DWE4?
The SN74HCT541DWE4 has a typical propagation delay (tpd) of 12 ns at VCC = 5.5 V with CL = 50 pF. This value is measured from input transition (A) to output transition (Y) under standard loading and confirms suitability for 20-MHz bus timing in industrial control and instrumentation applications.
Is SN74HCT541DWE4 pin-compatible with other packages in the same family?
SN74HCT541DWE4 shares identical pinout and logic function with other SN74HCT541 variants (e.g., SN74HCT541DBR, SN74HCT541N), but only within the same package type. The SOIC-20 (DW) footprint is not mechanically compatible with SSOP-20 (DB), PDIP-20 (N), or TSSOP-20 (PW); PCB layout must match the specific package dimensions and land pattern.
SN74HCT541DWE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HCT
- 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:
- 6mA, 6mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
SN74HCT541DWE4 FAQ
1.How can I place an order for SN74HCT541DWE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74HCT541DWE4 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 SN74HCT541DWE4 reliable?
The price and inventory of SN74HCT541DWE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74HCT541DWE4 is usually 5 days.
3.What payment methods are accepted for SN74HCT541DWE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74HCT541DWE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74HCT541DWE4?
SN74HCT541DWE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74HCT541DWE4 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 SN74HCT541DWE4?
For technical support, including SN74HCT541DWE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74HCT541DWE4 requirements.
6.How does Aetrix verify that SN74HCT541DWE4 is sourced from the original manufacturer or authorized distributors?
All SN74HCT541DWE4 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 SN74HCT541DWE4 meets industry standards.
7.What is the process for return or replacement of SN74HCT541DWE4?
All SN74HCT541DWE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74HCT541DWE4, 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 SN74HCT541DWE4 part is unused and in its original packaging.
Return procedure for SN74HCT541DWE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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