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Texas Instruments SN74HC541NS
- Part No.:
- SN74HC541NS
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
SN74HC541NS.pdf
- Description:
- IC BUFFER NON-INVERT 6V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,494
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Product details
Overview
SN74HC541NS 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 across 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 features dual active-low output-enable inputs (OE1, OE2) for precise bus control - used in PC motherboard I/O expansion and industrial controller backplanes.
For engineers reviewing the SN74HC541NS datasheet, SN74HC541NS pinout, SN74HC541NS application, or SN74HC541NS equivalent, key selection criteria include its wide supply range (2–6 V), high-current 3-state outputs capable of driving up to 15 LSTTL loads, low ICC (80 µA max), data-flow-through pinout for simplified PCB routing, and compatibility with legacy 74HC logic families.
Technical Context
The SN74HC541NS implements eight independent non-inverting buffers, each with true (non-inverted) input-to-output data path. Its 3-state outputs are controlled by a two-input NOR gate: both OE1 and OE2 must be low to enable outputs; either high forces all Y1–Y8 into high-impedance state.
This device uses silicon-gate CMOS technology, ensuring low static power consumption (ICC ≤ 80 µA at 6 V), high noise immunity (VIH ≥ 3.15 V at VCC = 4.5 V), and rail-to-rail output swing (VOH ≥ 4.4 V, VOL ≤ 0.26 V at VCC = 4.5 V, IO = ±6 mA).
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 microcontrollers driving 5 V peripherals) |
| Output Drive Capability | ±6 mA at VCC = 5 V - sufficient to directly drive 15 LSTTL loads or small LED arrays without external transistors |
| Propagation Delay (tpd) | 10 ns typical at VCC = 6 V, CL = 50 pF - enables reliable operation in 50 MHz bus environments with margin |
| Quiescent Current (ICC) | 80 µA maximum at VCC = 6 V - critical for low-power standby modes in portable and embedded systems |
| Input Leakage Current | ±1 µA maximum - ensures stable logic levels even with high-impedance pull-ups or long trace runs |
| 3-State Enable Timing (ten/tdis) | 15 ns typical (VCC = 6 V, CL = 50 pF) - allows fast bus arbitration and clean signal handoff between multiple drivers |
| ESD Rating (HBM) | ±2000 V - meets industrial handling requirements without additional protection circuitry |
Pinout & Package
SN74HC541NS is housed in a 20-pin SO (Small Outline) package with nominal body size 12.60 mm × 5.30 mm and gull-wing leads. 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 11–18), with OE1 (pin 1), OE2 (pin 19), VCC (pin 20), and GND (pin 10) positioned for optimal decoupling and enable control.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OE1 | Active-low output enable - must be low with OE2 to assert outputs; tied to VCC via pull-up for default high-Z at power-up |
| 2–9 | A1–A8 | Buffer inputs - accept CMOS- or TTL-level signals; require defined logic state (not floating) per design guidelines |
| 10 | GND | Ground reference - shared return path for all internal logic and output current; requires low-inductance connection |
| 11–18 | Y1–Y8 | True-buffered 3-state outputs - present A1–A8 when enabled; high-impedance otherwise to prevent bus contention |
| 19 | OE2 | Second active-low output enable - forms NOR logic with OE1; provides redundancy or split-bus control capability |
| 20 | VCC | Positive supply - must be bypassed with 0.1 µF ceramic capacitor placed adjacent to pin for noise suppression |
Key Features
| Feature | Design Value |
|---|---|
| Data-flow-through pinout | Inputs (A1–A8) and outputs (Y1–Y8) on opposite sides - reduces layer count and crosstalk in dense PCB layouts |
| Dual output-enable architecture | OE1 and OE2 form NOR gate - enables fail-safe bus disable (either signal high disables all outputs) |
| Wide voltage operation (2–6 V) | Single device supports 2.5 V, 3.3 V, and 5 V logic domains - eliminates level-shifter need in mixed-supply systems |
| High-current 3-state outputs | ±6 mA drive at 5 V - drives LEDs directly or interfaces with legacy TTL loads without external buffers |
| Low power consumption | 80 µA max ICC - extends battery life in portable instrumentation and reduces thermal load in fanless enclosures |
Applications
| PC I/O Expansion | Industrial PLC Backplane |
|---|---|
Use Scenario: Isolating and buffering parallel address/data lines between CPU module and peripheral cards in modular PC architectures. IC Role / Device Role / Timing Role: Non-inverting buffer with 3-state control - enables bidirectional bus sharing while preventing signal contention during card hot-swap. Use Value: Eliminates need for discrete transceivers; 10 ns tpd ensures timing compliance with ISA/PCI legacy timing budgets. |
Use Scenario: Driving opto-isolated input modules and relay driver banks in programmable logic controller rack systems. IC Role / Device Role / Timing Role: Level-shifting and current-boosting interface - translates 3.3 V FPGA outputs to 5 V/24 V-compatible logic levels with robust noise immunity. Use Value: ±6 mA drive sustains LED indicators and solid-state relays; 2–6 V range accommodates diverse field power rails. |
| LED Matrix Driver | Wearable Sensor Hub Interface |
Use Scenario: Row/column scanning control for monochrome LED displays in point-of-sale terminals and kiosks. IC Role / Device Role / Timing Role: High-current sink/source buffer - sequentially activates LED rows while sourcing column current through microcontroller GPIOs. Use Value: Direct LED drive capability (up to 6 mA per channel) removes external FETs, reducing BOM cost and board area. |
Use Scenario: Signal conditioning and isolation between ultra-low-power sensor nodes (e.g., accelerometers, HRMs) and host MCU in fitness trackers. IC Role / Device Role / Timing Role: Low-leakage signal repeater - preserves weak analog/digital sensor signals across noisy flex-cable interconnects. Use Value: 1 µA max input leakage prevents bias current errors in high-impedance sensor paths; 80 µA ICC minimizes quiescent drain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HCT541NS | CMOS input thresholds compatible with TTL (VIH = 2 V min), higher ICC (160 µA max), same pinout and drive | Better suited for direct interfacing with legacy 5 V TTL logic without level shifters | Select when driving older 5 V TTL buses where input voltage margins are marginal |
| 74LCX541MTCX | Lower VCC range (2.0–3.6 V), 24 mA drive, smaller TSSOP-20 package (4.4 × 6.5 mm), different pinout | Optimized for 3.3 V-only portable systems requiring higher drive and space savings | Select for compact, battery-powered designs needing >6 mA per channel and 3.3 V native operation |
Compared with SN74HC541NS, SN74HCT541NS offers TTL-compatible inputs at the cost of higher static power, while 74LCX541MTCX delivers higher drive and smaller footprint but sacrifices 5 V operation and pin compatibility - choice depends on voltage domain, power budget, and layout constraints.
Availability
SN74HC541NS is available at Aetrix Electronics and suitable for PC I/O expansion, industrial PLC backplanes, and LED matrix driver applications requiring stable component supply across extended production lifecycles.
Supply support for SN74HC541NS 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 delivering analog and embedded processing solutions, with over 90 years of innovation in logic, power management, and signal chain technologies.
The SN74HC541NS belongs to TI's industry-standard 74HC logic family, engineered for robust performance in industrial, computing, and communications equipment where reliability, wide voltage tolerance, and bus integrity are essential.
FAQ
What is the operating temperature range for SN74HC541NS?
The SN74HC541NS is rated for operation from –40°C to +85°C ambient temperature. This commercial-grade specification aligns with standard industrial environments and ensures stable timing and drive performance across full voltage range (2–6 V). The device does not support extended military or automotive temperature grades; for those, SN54HC541J (–55°C to +125°C) is specified.
Can SN74HC541NS drive LEDs directly?
Yes, SN74HC541NS can drive LEDs directly: each output delivers ±6 mA at 5 V, sufficient for indicator LEDs (typically 2–5 mA) without external current-limiting resistors in sink-mode configurations. For source-mode or higher-current LEDs, a series resistor is required to limit current to ≤6 mA per channel and avoid exceeding absolute maximum ratings.
How do OE1 and OE2 interact in SN74HC541NS?
In SN74HC541NS, OE1 and OE2 form a two-input NOR gate controlling all eight outputs. Both must be low to enable Y1–Y8; if either OE1 or OE2 is high, all outputs enter high-impedance state. This dual-enable structure provides redundancy and flexible bus arbitration - for example, OE1 may be controlled by system master while OE2 responds to local fault detection.
Is SN74HC541NS pin-compatible with other 74HC541 variants?
Yes, SN74HC541NS shares identical pinout and function with all SN74HC541 package variants (e.g., DW, DB, N, PW), including matching pin numbers for A1–A8, Y1–Y8, OE1, OE2, VCC, and GND. Mechanical dimensions differ, but PCB footprint and signal routing remain interchangeable across SO, SOIC, SSOP, PDIP, and TSSOP packages.
What is the maximum capacitive load SN74HC541NS can drive reliably?
SN74HC541NS is characterized for CL = 50 pF and CL = 150 pF loads. At VCC = 6 V, typical propagation delay increases from 10 ns (50 pF) to 14 ns (150 pF); output transition time (tt) rises from 6 ns to 13 ns. For reliable operation beyond 150 pF, add series termination or reduce edge rates - the device is not specified for transmission-line driving or heavy bus capacitance (>300 pF).
SN74HC541NS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- Package/Case:
- 20-SOIC (0.209", 5.30mm Width)
- Packaging:
- Bulk
- 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-SO
SN74HC541NS FAQ
1.How can I place an order for SN74HC541NS through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74HC541NS 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 SN74HC541NS reliable?
The price and inventory of SN74HC541NS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74HC541NS is usually 5 days.
3.What payment methods are accepted for SN74HC541NS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74HC541NS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74HC541NS?
SN74HC541NS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74HC541NS 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 SN74HC541NS?
For technical support, including SN74HC541NS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74HC541NS requirements.
6.How does Aetrix verify that SN74HC541NS is sourced from the original manufacturer or authorized distributors?
All SN74HC541NS 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 SN74HC541NS meets industry standards.
7.What is the process for return or replacement of SN74HC541NS?
All SN74HC541NS units undergo pre-shipment inspection (PSI). If there is an issue with SN74HC541NS, 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 SN74HC541NS part is unused and in its original packaging.
Return procedure for SN74HC541NS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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