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Texas Instruments SN74HC541DWR
- Part No.:
- SN74HC541DWR
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74HC541DWR.pdf
- Description:
- IC BUFFER NON-INVERT 6V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:15,285
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Product details
Overview
SN74HC541DWR 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 draws ≤80 µA ICC - enabling direct driving of up to 15 LSTTL loads in PCs, servers, and wearable health devices.
For engineers reviewing the SN74HC541DWR datasheet, SN74HC541DWR pinout, SN74HC541DWR application, or SN74HC541DWR equivalent, key selection considerations include its dual active-low output-enable control (OE1/OE2), data-flow-through pinout for simplified PCB routing, high-current 3-state outputs, wide supply voltage range, and low input current (≤1 µA).
Technical Context
The SN74HC541DWR implements eight independent non-inverting buffers, each with true logic polarity and controlled by a two-input NOR gate formed by OE1 and OE2: either enable high forces all Y outputs into high-impedance state. Its inputs and outputs are physically segregated on opposite sides of the SOIC-20 package, reducing crosstalk and simplifying trace routing between parallel data buses.
Electrical behavior is defined across –40°C to +85°C, with guaranteed VOH ≥3.98 V and VOL ≤0.26 V at IO = ±6 mA (VCC = 4.5 V), input thresholds compliant with HC logic families, and ESD robustness per HBM ±2000 V and CDM ±1000 V - supporting reliable operation in industrial and commercial embedded environments.
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 LSTTL loads or small LEDs without external transistors |
| Propagation Delay (tpd) | 10 ns typical (VCC = 6 V, CL = 50 pF) - enables use in medium-speed digital buses up to ~50 MHz |
| Quiescent Current (ICC) | 80 µA maximum - ensures minimal standby power in battery-sensitive applications like wearables |
| Input Leakage Current | 1 µA maximum - prevents unintended biasing of floating or high-impedance source nodes |
| 3-State Enable Logic | Active-low dual OE (OE1 and OE2) - both must be low to enable outputs; single OE high disables all eight channels |
| ESD Rating (HBM) | ±2000 V - meets standard industrial handling requirements without special ESD controls |
Pinout & Package
SN74HC541DWR is housed in a 20-pin SOIC (DW) package measuring 12.80 mm × 7.50 mm, with gull-wing leads and RoHS-compliant NiPdAu finish. The pinout follows a data-flow-through arrangement: all eight inputs (A1–A8) occupy pins 2–9 on one side, while corresponding outputs (Y1–Y8) occupy pins 11–18 on the opposite side - optimizing PCB layout for parallel bus routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OE1, OE2 | Active-low output enable inputs - NOR logic: either high forces all Y outputs into high-Z |
| 2–9 | A1–A8 | Buffer input terminals - accept CMOS- or TTL-level signals; no internal pull-ups |
| 10 | GND | Ground reference - must be low-impedance connection for noise immunity and switching stability |
| 11–18 | Y1–Y8 | True-buffered 3-state outputs - present A-input logic level when enabled; high-Z otherwise |
| 20 | VCC | Power supply - requires local 0.1-µF bypass capacitor placed adjacent to pin for transient suppression |
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 trace length in dense bus layouts |
| Dual active-low output enables | OE1 and OE2 provide redundant or split control - allows flexible bus arbitration (e.g., master/slave enable partitioning) |
| High-current 3-state outputs | ±6 mA drive at 5 V - eliminates need for discrete buffer stages when interfacing to legacy TTL or LED arrays |
| Low power consumption | 80 µA max ICC - supports always-on subsystems in energy-constrained devices such as point-of-sale terminals |
| Wide voltage operation | 2 V to 6 V supply range - enables interoperability across 2.5 V, 3.3 V, and 5 V logic domains without level shifters |
Applications
| LED Driver Interface | Server Backplane Buffer |
|---|---|
|
Use Scenario: Driving 8-segment LED displays or indicator arrays from a microcontroller GPIO port. IC Role / Device Role: Level-shifting and current-boosting buffer between low-drive MCU pins and higher-current LED segments. Use Value: Eliminates external transistor arrays; ±6 mA per channel supports common-anode/cathode configurations at 5 V. |
Use Scenario: Isolating and strengthening address/data bus signals between CPU and peripheral slots on a server motherboard. IC Role / Device Role: Bidirectional bus driver with 3-state control for shared memory or I/O expansion paths. Use Value: Prevents signal contention during hot-swap events; high-Z state ensures clean bus release under OE control. |
| Wearable Health Sensor Hub | POS Terminal Peripheral Interface |
|
Use Scenario: Interfacing multiple analog sensor ADCs and digital sensors to a low-power ARM Cortex-M0+ host MCU. IC Role / Device Role: Signal conditioning and domain isolation buffer for mixed-voltage sensor subsystems. Use Value: 2 V–6 V operation matches diverse sensor supply rails; 80 µA ICC minimizes impact on battery life. |
Use Scenario: Connecting barcode scanners, receipt printers, and cash drawers to an embedded POS controller. IC Role / Device Role: Robust logic-level translator and load driver for noisy industrial peripherals. Use Value: ±2000 V HBM ESD rating withstands frequent human contact; 3-state outputs prevent bus lockup during peripheral disconnect. |
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 | Choose when driving from older 5 V TTL sources; same SOIC-20 footprint and layout |
| 74LCX541MTCX | Lower VCC range (2.0–3.6 V), higher speed (tpd = 5.5 ns @ 3.3 V), and 3.6 V-tolerant inputs | Optimized for modern low-voltage systems only; not 5 V operable | Select for 3.3 V-only designs requiring faster timing or lower dynamic power |
Compared with SN74HC541DWR, SN74HCT541DWR offers improved noise immunity with TTL input thresholds but identical packaging and DC specs, while 74LCX541MTCX trades 5 V compatibility for higher speed and lower voltage operation - making SN74HC541DWR the optimal general-purpose choice for mixed-voltage industrial and computing interfaces.
Availability
SN74HC541DWR is available at Aetrix Electronics and suitable for server backplanes, POS terminal peripherals, and wearable health sensor hubs requiring stable component supply, long-term manufacturability, and RoHS-compliant sourcing.
Supply support for SN74HC541DWR 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.
SN74HC541DWR belongs to TI's HC logic family - engineered for broad-voltage interoperability, low power, and robust noise immunity in commercial and industrial digital interface applications.
FAQ
What is the operating temperature range for SN74HC541DWR?
The SN74HC541DWR is rated for operation from –40°C to +85°C ambient temperature. This commercial-grade specification aligns with TI's SN74HC-series qualification and supports deployment in desktop PCs, servers, and indoor industrial equipment. It is not rated for extended temperature ranges like the military-grade SN54HC541 (–55°C to +125°C).
Does SN74HC541DWR support 3.3 V logic levels?
Yes, SN74HC541DWR fully supports 3.3 V operation: its recommended VCC range includes 3.3 V, input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 3.3 V) are compatible with standard 3.3 V CMOS outputs, and it delivers ≥3.0 V VOH and ≤0.35 V VOL at ±4 mA load - meeting 3.3 V LVTTL and LVCMOS interface requirements.
How are the output-enable pins OE1 and OE2 used in SN74HC541DWR?
In SN74HC541DWR, OE1 and OE2 form a two-input NOR gate controlling all eight outputs: both must be logic low to enable Y1–Y8; if either is high, all outputs enter high-impedance state. This allows flexible bus control - e.g., OE1 tied to system enable and OE2 to peripheral select - and ensures fail-safe high-Z during power-up when pulled high via external resistors.
Can SN74HC541DWR drive LEDs directly?
Yes, SN74HC541DWR can drive LEDs directly: each Y output sources or sinks up to ±6 mA at 5 V, sufficient for indicator LEDs (typically 2–5 mA). For common-anode configurations, connect LED cathode to Y and anode to VCC via current-limiting resistor; for common-cathode, connect LED anode to Y and cathode to GND. Always verify forward voltage and current against absolute max ratings.
What is the thermal resistance (RθJA) of SN74HC541DWR in its SOIC package?
The junction-to-ambient thermal resistance (RθJA) for SN74HC541DWR in the SOIC-20 (DW) package is 109.1°C/W, measured under standard JEDEC JESD51-2 conditions (single-layer board, 1 in² copper pad). This value assumes no additional heatsinking; actual board layout, copper area, and airflow will affect real-world thermal performance - especially under sustained 6 mA per output loading.
SN74HC541DWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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
SN74HC541DWR FAQ
1.How can I place an order for SN74HC541DWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74HC541DWR 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 SN74HC541DWR reliable?
The price and inventory of SN74HC541DWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74HC541DWR is usually 5 days.
3.What payment methods are accepted for SN74HC541DWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74HC541DWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74HC541DWR?
SN74HC541DWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74HC541DWR 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 SN74HC541DWR?
For technical support, including SN74HC541DWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74HC541DWR requirements.
6.How does Aetrix verify that SN74HC541DWR is sourced from the original manufacturer or authorized distributors?
All SN74HC541DWR 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 SN74HC541DWR meets industry standards.
7.What is the process for return or replacement of SN74HC541DWR?
All SN74HC541DWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74HC541DWR, 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 SN74HC541DWR part is unused and in its original packaging.
Return procedure for SN74HC541DWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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