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Texas Instruments SN74HCT541NSRG4
- Part No.:
- SN74HCT541NSRG4
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
SN74HCT541NSRG4.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,600
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Product details
Overview
SN74HCT541NSRG4 from Texas Instruments is an octal non-inverting 3-state buffer/line driver IC operating at 4.5 V–5.5 V, delivering ±6 mA output drive at 5 V, 12 ns typical propagation delay, and 80 µA max ICC. It interfaces directly with system buses or drives up to 15 LSTTL loads in industrial control backplanes and data acquisition subsystems.
For engineers reviewing the SN74HCT541NSRG4 datasheet, SN74HCT541NSRG4 pinout, SN74HCT541NSRG4 application, or SN74HCT541NSRG4 equivalent, key selection criteria include 3-state enable logic (dual OE inputs), TTL-compatible inputs, data-flow-through pinout for PCB layout optimization, and SO package thermal performance (RθJA = 113.4 °C/W).
Technical Context
This device implements eight independent non-inverting buffers, each with high-impedance (3-state) outputs controlled by a dual-input NOR gate (OE1 and OE2). When either OE input is high, all Y outputs enter high-Z mode-no internal bus contention or leakage paths are enabled during disable.
Its HCT logic family ensures TTL-voltage compatibility (VIH = 2 V, VIL = 0.8 V) while maintaining CMOS power efficiency. The data-flow-through pinout places all eight A inputs on one side and all eight Y outputs on the opposite side of the 20-pin SO package, minimizing trace crossovers in dense routing environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 4.5 V–5.5 V - compatible with standard 5 V logic rails and tolerant of ±5% regulation variation |
| Propagation delay (tpd) | 12 ns typ @ 5.5 V, CL = 50 pF - enables reliable operation in 33 MHz bus systems |
| Output drive | ±6 mA @ 5 V - sufficient to sink/source 15 LSTTL loads without external buffering |
| Input current | ±1 µA max - eliminates need for pull-up/pull-down resistors on unused inputs in most cases |
| Quiescent current (ICC) | 80 µA max - supports low-power standby modes in battery-backed or energy-conscious designs |
| 3-state enable logic | NOR-gated OE1/OE2 - either signal high forces all outputs to high-Z, simplifying bus arbitration control |
| Input voltage compatibility | VIH = 2 V, VIL = 0.8 V - interoperable with legacy TTL, 74LS, and mixed-voltage microcontroller GPIOs |
Pinout & Package
The SN74HCT541NSRG4 is housed in a 20-pin SOP (Small Outline Package) with 15.00 mm × 5.30 mm body size, 1.27 mm lead pitch, and gull-wing leads. Package conforms to JEDEC MS-012 and is RoHS-compliant with NIPDAU lead finish and MSL Level-1 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | A1–A8 Inputs | True logic inputs driving corresponding Y outputs; TTL-compatible thresholds |
| 9, 19 | OE1, OE2 | Active-low 3-state enable controls; NOR logic - either high disables all outputs |
| 10, 11, 12, 13, 14, 15, 16, 18 | Y1–Y8 Outputs | Non-inverting buffered outputs; high-Z when OE1 or OE2 = high |
| 17 | GND | Ground reference for logic and output stages; must be low-impedance connection |
| 20 | VCC | Positive supply rail; requires local 0.1 µF bypass capacitor per TI recommendation |
Key Features
| Feature | Design Value |
|---|---|
| Data-flow-through pinout | Inputs (A1–A8, OE1, OE2) on left side; outputs (Y1–Y8) on right side - reduces layer count and vias in PCB layout |
| High-current 3-state outputs | ±6 mA drive capability at 5 V - eliminates need for discrete bus transceivers in moderate-load applications |
| TTL-voltage compatible inputs | VIH = 2 V, VIL = 0.8 V - ensures interoperability with legacy 74LS, 74F, and microcontroller I/O without level shifters |
| Low quiescent power | 80 µA max ICC - enables use in always-on monitoring circuits without thermal derating concerns |
| Robust ESD protection | Exceeds 2 kV HBM - suitable for assembly-line handling and field-replaceable module integration |
Applications
| Industrial PLC Backplane Interface | Test Equipment Signal Routing |
|---|---|
Use Scenario: Isolating and buffering address/data lines between CPU module and I/O expansion slots in modular PLC chassis. IC Role / Device Role / Timing Role: Non-inverting buffer with 3-state control enables bidirectional bus sharing across multiple slot controllers. Use Value: Data-flow-through pinout minimizes trace length mismatch; ±6 mA drive sustains signal integrity over 15 cm backplane runs. | Use Scenario: Switching analog and digital stimulus signals between DUT interface connectors and measurement instruments. IC Role / Device Role / Timing Role: Logic-level signal conditioner and bus isolator, enabling safe hot-swap of test fixtures without ground loops. Use Value: Dual OE inputs allow synchronized enable/disable of all channels; 12 ns tpd supports <100 MHz pattern rates. |
| Automotive Body Control Module | Medical Data Acquisition Front-End |
Use Scenario: Interfacing microcontroller GPIOs to higher-current sensor actuation lines (e.g., solenoid drivers, LED banks) in BCM subassemblies. IC Role / Device Role / Timing Role: Level-shifting and current-boosting buffer with fail-safe high-Z state during MCU reset or fault conditions. Use Value: TTL-compatible inputs accept direct connection to automotive MCUs; 80 µA ICC supports low-power sleep modes. | Use Scenario: Buffering multiplexed ADC channel select lines and sensor excitation signals in portable ECG/EEG devices. IC Role / Device Role / Timing Role: Noise-immune digital line driver ensuring precise timing alignment between channel selection and sampling clocks. Use Value: Low input current (<1 µA) prevents loading of precision reference dividers; SO package supports compact 4-layer PCB layouts. |
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 active-low OE; identical voltage, drive, and timing specs | Requires logic inversion in signal path; unsuitable where true (non-inverting) buffering is mandatory | Select only if system design accommodates inverted data flow and OE polarity matches control firmware |
| 74ACT541SCX | Faster tpd (9 ns typ); higher ICC (2 mA max); 4.5–5.5 V supply; ACT family noise margin lower than HCT | Better speed but higher power and reduced noise immunity; not drop-in due to different AC characteristics | Prefer for high-speed timing-critical paths where layout allows tighter decoupling and thermal management |
Compared with SN74HCT240N and 74ACT541SCX, SN74HCT541NSRG4 provides true (non-inverting) output logic with superior noise immunity and lower static power-making it optimal for industrial backplanes and mixed-signal interface layers where signal fidelity and power efficiency are prioritized over raw speed.
Availability
SN74HCT541NSRG4 is available at Aetrix Electronics and suitable for industrial PLC backplanes, automated test equipment signal routing, and medical data acquisition front-ends requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for SN74HCT541NSRG4 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 SN74HCT541NSRG4 belongs to TI's industry-standard 74HCT logic family, designed specifically for robust 5 V system interfacing-emphasizing TTL compatibility, low power, and PCB-layout-friendly packaging for industrial control and instrumentation applications.
FAQ
What is the maximum operating temperature range for the SN74HCT541NSRG4?
The SN74HCT541NSRG4 is rated for operation from –40 °C to +85 °C ambient temperature. This industrial-grade range supports deployment in factory automation cabinets, outdoor test enclosures, and vehicle-mounted control units without derating. Thermal resistance (RθJA = 113.4 °C/W) confirms suitability for natural-convection cooling in standard SO-mount applications.
Does the SN74HCT541NSRG4 require external pull-up or pull-down resistors on unused inputs?
No-unused inputs of the SN74HCT541NSRG4 may be tied directly to VCC or GND without external resistors, thanks to its ≤1 µA max input current. TI explicitly recommends hard-wiring all unused inputs to a defined logic level to prevent floating states that could cause increased ICC or erratic output behavior. The SN74HCT541NSRG4 does not require biasing networks for stable operation.
How does the dual OE architecture of the SN74HCT541NSRG4 improve system reliability?
The SN74HCT541NSRG4 uses a NOR-gated dual OE (OE1 and OE2) structure: either input high forces all eight outputs into high-impedance mode. This redundancy prevents accidental bus contention during partial controller resets or firmware faults. In systems with distributed enable logic-such as multi-master backplanes-the SN74HCT541NSRG4 allows independent control of local and global bus isolation without additional glue logic.
Can the SN74HCT541NSRG4 drive a 50-pF load with guaranteed timing at 5.5 V?
Yes-the SN74HCT541NSRG4 guarantees tpd ≤31 ns and ten/tdis ≤41 ns under recommended conditions (VCC = 5.5 V, TA = 25 °C, CL = 50 pF). These values are specified in Section 5.5 of the official datasheet (SCLS306E). For worst-case industrial temperature extremes (–40 °C to +85 °C), timing margins remain sufficient for 25 MHz synchronous bus operation with standard PCB trace capacitance.
Is the SN74HCT541NSRG4 pin-compatible with other packages in the SN74HCT541 family?
Yes-the SN74HCT541NSRG4 shares identical 20-pin functional pinout with all SN74HCT541 variants (e.g., SN74HCT541N, SN74HCT541DWR, SN74HCT541PWR), including A1–A8, Y1–Y8, OE1, OE2, VCC, and GND assignments. Mechanical dimensions differ across SO (NS), PDIP (N), SOIC (DW), and TSSOP (PW), but logic-level pin mapping and electrical behavior are fully consistent-enabling drop-in replacement during prototyping or rework.
SN74HCT541NSRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HCT
- Package/Case:
- 20-SOIC (0.209", 5.30mm 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:
- 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-SO
SN74HCT541NSRG4 FAQ
1.How can I place an order for SN74HCT541NSRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74HCT541NSRG4 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 SN74HCT541NSRG4 reliable?
The price and inventory of SN74HCT541NSRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74HCT541NSRG4 is usually 5 days.
3.What payment methods are accepted for SN74HCT541NSRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74HCT541NSRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74HCT541NSRG4?
SN74HCT541NSRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74HCT541NSRG4 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 SN74HCT541NSRG4?
For technical support, including SN74HCT541NSRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74HCT541NSRG4 requirements.
6.How does Aetrix verify that SN74HCT541NSRG4 is sourced from the original manufacturer or authorized distributors?
All SN74HCT541NSRG4 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 SN74HCT541NSRG4 meets industry standards.
7.What is the process for return or replacement of SN74HCT541NSRG4?
All SN74HCT541NSRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74HCT541NSRG4, 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 SN74HCT541NSRG4 part is unused and in its original packaging.
Return procedure for SN74HCT541NSRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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