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Texas Instruments SN74HCT541DWG4
- Part No.:
- SN74HCT541DWG4
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74HCT541DWG4.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,531
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Product details
Overview
SN74HCT541DWG4 from Texas Instruments is an octal non-inverting 3-state buffer/line driver IC designed for bus interface and signal isolation in 5-V TTL-compatible digital systems. It features true data output logic, dual 3-state enable inputs (OE1/OE2), ±6-mA output drive at 5 V, 12-ns typical propagation delay, and operates across 4.5 V to 5.5 V supply range - enabling robust system bus buffering in industrial control backplanes.
For engineers reviewing the SN74HCT541DWG4 datasheet, SN74HCT541DWG4 pinout, SN74HCT541DWG4 application, or SN74HCT541DWG4 equivalent, key selection criteria include its 20-pin SOIC (DW) package with input/output separation, high-current 3-state outputs capable of driving up to 15 LSTTL loads, low 80-µA max ICC quiescent current, and compatibility with standard TTL input voltage thresholds.
Technical Context
The SN74HCT541DWG4 implements eight independent non-inverting buffers, each with a dedicated input (A1–A8) and output (Y1–Y8), controlled collectively by two NOR-gated 3-state enable inputs (OE1 and OE2). When either OE1 or OE2 is high, all outputs enter high-impedance state - supporting bidirectional bus sharing without external logic.
Its HCT logic family ensures TTL-input compatibility (VIH = 2 V, VIL = 0.8 V) while maintaining CMOS power efficiency. The device uses silicon-gate Schottky-clamped technology for fast switching (tpd = 12 ns typ @ 5.5 V, CL = 50 pF) and low dynamic power dissipation (Cpd = 35 pF per buffer).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - supports stable operation across industrial 5-V rail tolerances without regulation. |
| Propagation Delay (tpd) | 12 ns typical @ 5.5 V, CL = 50 pF - enables reliable timing in 40-MHz+ synchronous bus interfaces. |
| Output Drive Strength | ±6 mA @ 5 V - sufficient to directly drive 15 LSTTL loads or terminate unterminated transmission lines. |
| Quiescent Current (ICC) | 80 µA maximum - minimizes standby power in battery-backed or energy-sensitive systems. |
| Input Voltage Compatibility | TTL-level: VIH = 2 V, VIL = 0.8 V - interoperable with legacy 74LS and 74ALS logic without level shifters. |
| 3-State Enable Logic | NOR-gated OE1/OE2 - single low on both enables outputs; either high forces high-Z - simplifies bus arbitration control. |
| Power Dissipation Capacitance | 35 pF per buffer - allows accurate dynamic power estimation (P = Cpd × V² × f) for thermal design. |
Pinout & Package
SN74HCT541DWG4 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 max height. The pinout follows a data flow-through arrangement: all eight inputs (A1–A8) are on one side (pins 2–9), all eight outputs (Y1–Y8) on the opposite side (pins 12–19), with VCC (pin 20), GND (pin 10), and dual 3-state enables OE1 (pin 1) and OE2 (pin 11) positioned for optimal PCB routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OE1 | Active-low 3-state enable input; OR'd with OE2 via internal NOR gate to disable all outputs. |
| 2–9 | A1–A8 | Buffer inputs; accept TTL-compatible signals and pass true logic to corresponding Y outputs. |
| 10 | GND | Ground reference for logic and power; must be low-impedance connection to minimize noise coupling. |
| 11 | OE2 | Second active-low 3-state enable; provides redundant or split-bus control capability. |
| 12–19 | Y1–Y8 | Non-inverting buffered outputs; enter high-Z when OE1 or OE2 is high - enables bus contention avoidance. |
| 20 | VCC | Positive supply (4.5–5.5 V); requires local 0.1-µF bypass capacitor per TI layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Data flow-through pinout | Inputs (A1–A8) and outputs (Y1–Y8) on opposite sides - reduces trace crossovers and improves signal integrity in dense PCB layouts. |
| High-current 3-state outputs | ±6-mA drive at 5 V - eliminates need for external bus transceivers when interfacing with multiple LSTTL loads. |
| TTL-input compatible | VIH = 2 V, VIL = 0.8 V - ensures direct connection to legacy 74LS/ALS families without level-shifting circuitry. |
| Low quiescent power | 80-µA max ICC - extends operational life in always-on industrial monitoring nodes and low-power control modules. |
| Dual 3-state enable architecture | OE1 and OE2 inputs with NOR logic - supports flexible bus arbitration schemes (e.g., master/slave, priority-based enable). |
Applications
| Industrial PLC Backplane Interface | Legacy System Bus Isolation |
|---|---|
|
Use Scenario: Isolating I/O module data lanes from main CPU bus in programmable logic controller chassis to prevent fault propagation. IC Role / Device Role / Timing Role: Octal buffer providing unidirectional signal conditioning and 3-state bus contention protection between modular subsystems. Use Value: Dual OE inputs allow synchronized enable/disable of all eight channels during hot-swap events, preventing bus glitches during module insertion/removal. |
Use Scenario: Interfacing modern microcontroller peripherals with aging 74LS-based peripheral cards in test equipment retrofits. IC Role / Device Role / Timing Role: Level-translation-capable buffer ensuring TTL-compatible voltage thresholds while adding drive strength and bus isolation. Use Value: 12-ns tpd and ±6-mA drive maintain timing margins and signal integrity across long backplane traces where LS devices fall short. |
| Automotive Body Control Module | Medical Diagnostic Instrument Data Routing |
|
Use Scenario: Routing sensor status signals from distributed door modules to central body controller over shared harness wiring. IC Role / Device Role / Timing Role: Signal repeater and fan-out driver with 3-state capability for time-division multiplexing of diagnostic lines. Use Value: Low 80-µA ICC supports always-on monitoring without excessive battery drain; SOIC package meets automotive AEC-Q200 mounting requirements. |
Use Scenario: Multiplexing analog-to-digital converter outputs and control signals between FPGA-based processing units and front-panel displays in portable diagnostics gear. IC Role / Device Role / Timing Role: Glitch-free bus driver enabling deterministic data handoff between clock domains using synchronized OE control. Use Value: Input transition time limit (500 ns) and tight VOL/VOL specs ensure clean logic levels critical for error-free communication in safety-critical medical data paths. |
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 |
|---|---|---|---|
| SN74HCT240N | Inverting outputs; dual 4-bit configuration with separate OE controls per group; identical voltage/current specs. | Suitable where signal polarity inversion is acceptable or required in bus direction control logic. | Select SN74HCT240N only if inverting logic matches system-level signal flow; otherwise SN74HCT541DWG4 preserves true data path. |
| 74ACT541PC | ACT family: higher speed (tpd = 8 ns), wider VCC range (4.5–5.5 V), but higher ICC (40 mA max) and no TTL input compatibility. | Better for high-frequency data acquisition systems where speed outweighs power and compatibility constraints. | Choose 74ACT541PC only when >33-MHz bus timing is required and external level shifting is acceptable for non-TTL sources. |
Compared with SN74HCT240N and 74ACT541PC, SN74HCT541DWG4 uniquely balances TTL compatibility, low static power, and true-output logic in a single 20-pin SOIC package - making it optimal for cost-sensitive, interoperable, and power-constrained industrial bus interfaces.
Availability
SN74HCT541DWG4 is available at Aetrix Electronics and suitable for industrial PLC backplane interfaces, legacy system bus isolation, and automotive body control modules requiring stable component supply and long-term lifecycle support.
Supply support for SN74HCT541DWG4 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 industrial, automotive, and communications markets.
The SN74HCT541DWG4 belongs to TI's HCT logic family, engineered for seamless integration between TTL and CMOS systems - delivering reliability, interoperability, and low-power performance in industrial control and instrumentation applications.
FAQ
What is the recommended operating voltage range for SN74HCT541DWG4?
The SN74HCT541DWG4 operates reliably from 4.5 V to 5.5 V. This range accommodates standard 5-V supply tolerances in industrial environments and ensures consistent TTL-input compatibility and output drive performance. Operation outside this range may cause undefined behavior or damage, as specified in the absolute maximum ratings table of the SN74HCT541DWG4 datasheet.
How does the 3-state enable logic work on SN74HCT541DWG4?
The SN74HCT541DWG4 uses a 2-input NOR gate internally to combine OE1 and OE2: if either input is high, all eight outputs go high-impedance. Only when both OE1 and OE2 are low do the buffers become active. This architecture allows flexible bus control - for example, OE1 can serve as primary enable while OE2 acts as fault-safety override in the SN74HCT541DWG4.
Can SN74HCT541DWG4 drive standard LSTTL loads directly?
Yes, SN74HCT541DWG4 can drive up to 15 LSTTL loads per output, verified by its ±6-mA output current specification at 5 V. This capability eliminates the need for additional buffer stages in most backplane and board-level interconnect applications, simplifying design and reducing component count in systems using the SN74HCT541DWG4.
What is the typical propagation delay of SN74HCT541DWG4 under standard conditions?
The SN74HCT541DWG4 exhibits a typical propagation delay (tpd) of 12 ns when operated at 5.5 V with a 50-pF load, as measured from input transition to output transition. This value is confirmed in Section 5.5 of the official SN74HCT541DWG4 datasheet and supports reliable operation in 40-MHz synchronous bus environments.
Is SN74HCT541DWG4 pin-compatible with other packages in the same family?
No - SN74HCT541DWG4 is specific to the 20-pin SOIC (DW) package. While functional equivalents exist in SSOP (DB), PDIP (N), TSSOP (PW), and others, mechanical dimensions, thermal resistance (RθJA = 109.1 °C/W), and soldering profiles differ. Substituting packages requires PCB layout revision; the SN74HCT541DWG4 footprint is not interchangeable with SN74HCT541DBR or SN74HCT541N.
SN74HCT541DWG4 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
SN74HCT541DWG4 FAQ
1.How can I place an order for SN74HCT541DWG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74HCT541DWG4 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 SN74HCT541DWG4 reliable?
The price and inventory of SN74HCT541DWG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74HCT541DWG4 is usually 5 days.
3.What payment methods are accepted for SN74HCT541DWG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74HCT541DWG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74HCT541DWG4?
SN74HCT541DWG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74HCT541DWG4 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 SN74HCT541DWG4?
For technical support, including SN74HCT541DWG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74HCT541DWG4 requirements.
6.How does Aetrix verify that SN74HCT541DWG4 is sourced from the original manufacturer or authorized distributors?
All SN74HCT541DWG4 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 SN74HCT541DWG4 meets industry standards.
7.What is the process for return or replacement of SN74HCT541DWG4?
All SN74HCT541DWG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74HCT541DWG4, 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 SN74HCT541DWG4 part is unused and in its original packaging.
Return procedure for SN74HCT541DWG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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