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Texas Instruments SN74LVC541APWR
- Part No.:
- SN74LVC541APWR
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVC541APWR.pdf
- Description:
- IC BUF NON-INVERT 3.6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:42,402
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Product details
Overview
SN74LVC541APWR from Texas Instruments is an octal non-inverting buffer with 3-state outputs, designed for bus interface and signal redriving in 1.65V–3.6V systems. It features dual active-low output enables (OE1/OE2), 5.1ns max propagation delay at 3.3V, 5.5V-tolerant inputs, and Ioff support for live insertion - used in industrial control backplanes and FPGA I/O expansion.
For engineers reviewing the SN74LVC541APWR datasheet, SN74LVC541APWR pinout, SN74LVC541APWR application, or SN74LVC541APWR equivalent, key selection criteria include 3-state timing behavior, mixed-voltage signal compatibility (5V input into 3.3V VCC), thermal performance in TSSOP-20, and drive strength under 24mA sink/source conditions.
Technical Context
The SN74LVC541APWR implements eight independent CMOS buffers with logically ANDed 3-state control: both OE1 and OE2 must be low to enable outputs. Its balanced push-pull outputs deliver symmetrical ±24mA drive at 3.0V VCC while maintaining VOL ≤ 0.55V and VOH ≥ 2.2V.
Input tolerance up to 5.5V enables direct interfacing with legacy 5V logic without level shifters. The Ioff feature disables all outputs when VCC = 0V, preventing back-drive current and supporting hot-plug operation in partial-power-down systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V to 3.6V - supports single-supply operation across LVC logic families and mixed-voltage domains |
| Input Voltage Tolerance | Up to 5.5V - allows direct connection to 5V signals without external level translation |
| tpd (Max) | 5.1ns at VCC = 3.3V - enables reliable operation on PCB traces up to 12cm without signal integrity degradation |
| IOL/IOH (Max) | ±24mA at VCC = 3.0V - sufficient to drive 50pF loads or parallel multiple receivers in bus applications |
| Ioff Leakage | ±10μA at VI/VO = 5.5V - ensures safe live insertion and prevents power rail contention during partial power-down |
| ESD Rating (HBM) | ±2000V - meets industrial handling requirements per ANSI/ESDA/JEDEC JS-001 |
| Operating Temperature | –40°C to +125°C - qualified for automotive under-hood and industrial control environments |
Pinout & Package
Packaged in a 20-pin TSSOP (PW) with 0.65mm pitch, body size 6.5mm × 4.4mm, and exposed thermal pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OE1 (Pin 1) | Active-low output enable 1 | Must be low with OE2 to activate all eight outputs; enables system-level bus arbitration |
| OE2 (Pin 19) | Active-low output enable 2 | AND-gated with OE1 - provides redundant control for fault-tolerant enable schemes |
| A1–A8 (Pins 2–9) | Buffer inputs | CMOS-compatible inputs accepting 0–5.5V; require termination to VCC/GND if unused |
| Y1–Y8 (Pins 11–18) | 3-state buffered outputs | Drive high/low or float to high-Z; support bus sharing and signal isolation |
| VCC (Pin 20) | Positive supply | Supplies internal logic and output drivers; requires local 0.1μF bypass capacitor |
| GND (Pin 10) | Ground reference | Return path for all I/O and supply currents; must connect to low-impedance ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal operation | 5V-tolerant inputs with 3.3V VCC allow seamless integration between legacy and modern logic families |
| Balanced CMOS 3-state outputs | Symmetrical ±24mA drive capability ensures consistent rise/fall times and reduces signal skew |
| Ioff partial-power-down protection | Prevents back-drive current when VCC is off - essential for hot-swap and modular system designs |
| Low ground bounce (VOLP < 0.8V) | Minimizes noise coupling into shared ground paths during simultaneous switching |
| High noise immunity (VIH/VIL thresholds) | Guaranteed 2.0V VIH and 0.8V VIL at 3.3V VCC provide >0.7V noise margin against EMI |
Applications
| Industrial Backplane Interface | FPGA I/O Expansion |
|---|---|
Use Scenario: Isolating and redriving control signals between PLC CPU and distributed I/O modules over 10–15cm PCB traces. IC Role / Device Role / Timing Role: Non-inverting buffer with 3-state control acts as a bidirectional bus driver during configuration and unidirectional repeater during runtime. Use Value: 5.1ns tpd and 50pF load capability maintain signal integrity across long traces; Ioff prevents back-drive during module hot-swap. |
Use Scenario: Extending FPGA GPIO count to drive LEDs, relays, and sensors in edge-computing gateways. IC Role / Device Role / Timing Role: Level-shifting buffer translates 1.8V/3.3V FPGA outputs to 5V-tolerant peripheral interfaces while enabling/disabling groups via OE pins. Use Value: 5.5V input tolerance eliminates external level shifters; ±24mA drive directly activates indicator LEDs without series resistors. |
| Automotive Body Control Module | Test Equipment Signal Conditioning |
Use Scenario: Driving LIN bus transceivers and sensor multiplexers in under-dash ECUs operating from 12V DC-DC rails. IC Role / Device Role / Timing Role: Redriver isolates MCU GPIOs from noisy power domains and provides robust 3-state control during sleep/wake transitions. Use Value: –40°C to +125°C rating ensures reliability; Ioff blocks leakage during battery-save mode; 2kV HBM withstands workshop ESD events. |
Use Scenario: Conditioning digital stimulus signals in automated test equipment before routing to DUTs with varying voltage thresholds. IC Role / Device Role / Timing Role: Precision buffer with matched tpd and low skew preserves timing margins across multi-channel pattern generators. Use Value: 1ns max skew between channels maintains phase alignment; 3.3V operation matches ATE controller logic levels. |
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 |
|---|---|---|---|
| 74LVC541APW | Same pinout and electrical specs; identical PW package; TI's commercial-grade variant (non-automotive qualification) | No AEC-Q100 qualification; suitable for non-automotive industrial use only | Select when automotive temperature range or qualification is not required - lower cost, same footprint |
| SN74LVCH16244APAG | 16-bit, dual-OE, LVCH family; higher drive (±24mA), wider VCC (1.65–3.6V), but 48-pin TSSOP package | Higher channel count and different pinout - requires PCB redesign; better for dense I/O expansion | Choose when scaling beyond 8 channels is needed; not drop-in compatible due to pin count and layout change |
Compared with 74LVC541APW, SN74LVC541APWR adds AEC-Q100 qualification and extended temperature support; compared with SN74LVCH16244APAG, it offers half the channel count in a compact 20-pin footprint ideal for space-constrained redrive nodes.
Availability
SN74LVC541APWR is available at Aetrix Electronics and suitable for industrial backplane interfaces, FPGA I/O expansion, automotive body control modules, and test equipment signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LVC541APWR 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 decades of experience in high-reliability industrial and automotive IC design.
The SN74LVC541APWR belongs to TI's LVC logic family, engineered for low-voltage, high-speed, 3-state bus interface applications where mixed-voltage compatibility and robust hot-swap operation are critical.
FAQ
What is the maximum capacitive load SN74LVC541APWR can drive while meeting datasheet timing specs?
The SN74LVC541APWR is characterized for loads ≤50pF across its full operating range. Driving larger capacitances increases propagation delay and may cause signal integrity issues like ringing or overshoot. For loads exceeding 50pF, add series damping resistors near the output or use a second-stage buffer. The SN74LVC541APWR's 5.1ns tpd at 3.3V assumes a 30pF load per output, as defined in TI's parameter measurement setup.
Can SN74LVC541APWR safely interface a 5V microcontroller output to a 3.3V FPGA input?
Yes - the SN74LVC541APWR accepts input voltages up to 5.5V regardless of VCC level, making it ideal for translating 5V logic to 3.3V domains. When powered at 3.3V, its outputs swing rail-to-rail (0V to 3.3V), matching FPGA I/O thresholds. No external level shifter is needed, and the device maintains full timing compliance and noise immunity in this configuration.
How do OE1 and OE2 interact to control the outputs of SN74LVC541APWR?
Both OE1 (Pin 1) and OE2 (Pin 19) are active-low enables that operate in logical AND: outputs Y1–Y8 go high-impedance unless *both* pins are driven low. This dual-enable architecture supports fail-safe bus control - for example, one OE can be tied to system reset while the other responds to software arbitration, ensuring outputs remain disabled unless explicitly authorized.
Does SN74LVC541APWR require external pull-up or pull-down resistors on unused inputs?
Yes - all unused inputs (A1–A8) must be terminated to either VCC or GND to prevent floating nodes, which cause excessive power consumption, oscillation, or latch-up. TI recommends 10kΩ resistors for default HIGH (pull-up) or LOW (pull-down) states. Leaving inputs unconnected violates recommended operating conditions and risks unreliable operation across temperature and voltage corners.
What thermal considerations apply to SN74LVC541APWR in continuous 24mA output operation?
In worst-case conditions (all eight outputs sourcing/sinking 24mA at 3.3V), SN74LVC541APWR dissipates ~0.63W. Its TSSOP-20 package has RθJA = 120.3°C/W - resulting in ~76°C junction rise above ambient. To stay within the 125°C max junction limit, keep ambient ≤49°C or improve PCB copper area and airflow. Use the thermal pad (connected to GND) to reduce RθJC and enhance heat transfer.
SN74LVC541APWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 20-TSSOP (0.173", 4.40mm 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:
- 24mA, 24mA
- Voltage - Supply:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
SN74LVC541APWR FAQ
1.How can I place an order for SN74LVC541APWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC541APWR 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 SN74LVC541APWR reliable?
The price and inventory of SN74LVC541APWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC541APWR is usually 5 days.
3.What payment methods are accepted for SN74LVC541APWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC541APWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC541APWR?
SN74LVC541APWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC541APWR 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 SN74LVC541APWR?
For technical support, including SN74LVC541APWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC541APWR requirements.
6.How does Aetrix verify that SN74LVC541APWR is sourced from the original manufacturer or authorized distributors?
All SN74LVC541APWR 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 SN74LVC541APWR meets industry standards.
7.What is the process for return or replacement of SN74LVC541APWR?
All SN74LVC541APWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC541APWR, 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 SN74LVC541APWR part is unused and in its original packaging.
Return procedure for SN74LVC541APWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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