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Texas Instruments SN74LVC541ANS
- Part No.:
- SN74LVC541ANS
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
SN74LVC541ANS.pdf
- Description:
- IC BUFFER NON-INVERT 3.6V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,453
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Product details
Overview
SN74LVC541ANS 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 digital signal integrity enhancement on PCBs with long traces or capacitive loads.
For engineers reviewing the SN74LVC541ANS datasheet, SN74LVC541ANS pinout, SN74LVC541ANS application, or SN74LVC541ANS equivalent, key selection criteria include 3-state control logic requiring both OE1 and OE2 low, mixed-mode voltage operation (5V inputs into 3.3V VCC), ground-bounce/undershoot performance, thermal metrics for TSSOP-20, and compatibility with 50pF max load capacitance.
Technical Context
The SN74LVC541ANS implements eight independent CMOS buffers with fully balanced push-pull 3-state outputs-capable of sourcing and sinking up to ±24mA at 3V VCC. Its dual active-low enable architecture requires simultaneous assertion of OE1 and OE2 to activate outputs, preventing partial enable states.
It supports true mixed-voltage operation: inputs tolerate 0–5.5V regardless of VCC (1.65–3.6V), enabling interfacing between 5V legacy peripherals and 3.3V logic domains. Ioff circuitry ensures near-zero leakage (<10μA) when VCC = 0V, supporting partial power-down and hot-swap capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V to 3.6V - Enables direct integration into modern low-voltage digital systems without level shifters. |
| Input Voltage Tolerance | 0V to 5.5V - Allows safe connection to 5V signals while powered from 3.3V or lower supplies. |
| tpd (Max) | 5.1ns at VCC = 3.3V, TA = 25°C - Supports high-speed data redriving up to ~200MHz clock-equivalent rates. |
| Ioff Leakage | <±10μA at VI/VO = 5.5V - Ensures robust isolation during live insertion or system sleep modes. |
| Output Drive | ±24mA at VCC = 3V - Sufficient to drive 50Ω transmission lines or multiple CMOS inputs with margin. |
| Load Capacitance Limit | ≤50pF - Defines maximum trace + receiver capacitance before timing specs degrade. |
| ESD Rating (HBM) | ±2000V - Meets industrial-grade ESD immunity per ANSI/ESDA/JEDEC JS-001. |
Pinout & Package
Packaged in 20-pin TSSOP (PW), the SN74LVC541ANS measures 6.5mm × 6.4mm with 0.65mm lead pitch. The body size is 6.5mm × 4.4mm. Thermal pad is not present in this variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OE1 (Pin 1) | Active-low output enable 1 | Must be low with OE2 to enable all eight outputs; open-drain compatible with pull-up resistors. |
| OE2 (Pin 19) | Active-low output enable 2 | Second enable input; both OE1 and OE2 must be asserted low for Y1–Y8 to drive. |
| A1–A8 (Pins 2–9) | Buffer inputs | Non-inverting data inputs; accept 0–5.5V regardless of VCC; require termination if unused. |
| Y1–Y8 (Pins 11–18) | 3-state buffered outputs | Drive high/low or enter high-Z; capable of ±24mA; tolerate 0–5.5V in high-Z state. |
| VCC (Pin 20) | Positive supply | Supplies core logic and output drivers; requires local 0.1μF bypass capacitor. |
| GND (Pin 10) | Ground reference | Return path for all currents; must be low-impedance to minimize ground bounce (VOLP <0.8V). |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal operation | 5V-tolerant inputs with 3.3V VCC enable seamless interfacing between legacy 5V peripherals and modern low-voltage controllers. |
| Ioff partial-power-down protection | Prevents back-drive current and enables live insertion by disabling outputs when VCC = 0V, critical for modular backplane designs. |
| Balanced CMOS 3-state outputs | Symmetric ±24mA drive strength ensures consistent rise/fall times and minimizes signal distortion on matched loads. |
| Low ground bounce (VOLP) | Typical <0.8V at VCC = 3.3V reduces noise coupling into adjacent signals and improves noise margin in dense layouts. |
| Latch-up immunity | Exceeds 100mA per JESD78 - eliminates risk of destructive latch-up under transient overvoltage or ESD events. |
Applications
| Bus Signal Redriving | Digital Isolation During Reset |
|---|---|
|
Use Scenario: Extending a microcontroller's address/data bus across a 15cm PCB trace to an external memory IC with 35pF net load. IC Role / Device Role / Timing Role: Non-inverting redriver that restores signal edge integrity and compensates for trace RC delay. Use Value: Maintains setup/hold timing margins by reducing tpd-induced skew and suppressing reflections via controlled drive strength. |
Use Scenario: Holding a GPIO-controlled enable line steady while the host MCU undergoes cold reset (100ms+). IC Role / Device Role / Timing Role: 3-state buffer isolating the downstream circuit from reset-induced glitches on upstream control lines. Use Value: Prevents unintended activation of peripheral modules by forcing Y1–Y8 into high-Z until OE1/OE2 are reasserted post-reset. |
| LED Driver Interface | Transmission Line Termination |
|
Use Scenario: Driving eight discrete indicator LEDs (20mA each) from a 3.3V FPGA I/O bank with limited drive capability. IC Role / Device Role / Timing Role: Current-boosting buffer translating low-current logic levels to LED-sinking outputs. Use Value: Delivers full 24mA per channel without degrading VIL/VIH thresholds or increasing ICC beyond 10μA static draw. |
Use Scenario: Driving a 50Ω coaxial cable (1m length) carrying UART signals between two isolated subsystems. IC Role / Device Role / Timing Role: Source-terminated driver matching characteristic impedance to suppress ringing and overshoot. Use Value: Achieves clean 0–3.3V transitions with <5.1ns tpd and VOHV >2V, meeting RS-422-like signal fidelity requirements. |
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 |
|---|---|---|---|
| 74LVC541APWRE4 | Same logic function, identical pinout, but in tape-and-reel packaging (no tray); same electrical specs and TSSOP-20 footprint. | No functional difference; optimized for automated SMT assembly rather than manual prototyping. | Select when volume production and pick-and-place compatibility are required. |
| SN74LVCH16244ADGGR | 16-bit version in 48-pin TSSOP; includes bus-hold circuitry and higher drive (±24mA @ 3.3V), but requires separate OE per 4-bit group. | Used where wider data buses exist and per-nibble enable control is needed; not drop-in due to pin count and enable structure. | Choose only when scaling to 16-bit parallel interfaces and granular enable control justifies redesign. |
Compared with SN74LVC541ANS, 74LVC541APWRE4 offers identical performance in production-ready packaging, while SN74LVCH16244ADGGR provides expanded width and bus-hold but demands layout changes and firmware adaptation for enable sequencing.
Availability
SN74LVC541ANS is available at Aetrix Electronics and suitable for bus redriving, digital isolation during controller reset, LED interface circuits, and transmission line driving requiring stable component supply, consistent parametric performance, and long-term industrial lifecycle support.
Supply support for SN74LVC541ANS 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 heritage in industry-standard logic families.
The SN74LVC541ANS belongs to TI's LVC (Low-Voltage CMOS) logic series, engineered for interoperability across 1.65V–5.5V domains and optimized for signal integrity in space-constrained, mixed-voltage digital systems.
FAQ
What is the minimum VCC required for reliable operation of the SN74LVC541ANS?
The SN74LVC541ANS operates reliably down to 1.65V VCC across its full temperature range (–40°C to 125°C). Below this, DC parameters such as VOL and VOH degrade, and switching characteristics like tpd exceed specification limits. At 1.5V, the device retains data but does not guarantee functional operation - confirmed in Section 5.3 Recommended Operating Conditions of the official datasheet.
Can the SN74LVC541ANS safely interface a 5V microcontroller output to a 3.3V FPGA input?
Yes - the SN74LVC541ANS accepts input voltages up to 5.5V independent of VCC, making it ideal for level translation from 5V logic to 3.3V domains. When powered at 3.3V, its outputs swing rail-to-rail (0V to 3.3V), fully compatible with 3.3V FPGA I/O standards. No external resistors or clamps are needed, as internal protection diodes and Ioff ensure robustness.
How do the dual output enables (OE1 and OE2) function in the SN74LVC541ANS?
In the SN74LVC541ANS, both OE1 (Pin 1) and OE2 (Pin 19) must be driven low simultaneously to enable the eight outputs (Y1–Y8). If either enable is high, all outputs enter high-impedance state. This AND-gated enable logic prevents accidental partial activation and enhances system-level fault containment - verified in the Function Table (Section 7.4) and Pin Functions table.
What is the maximum capacitive load the SN74LVC541ANS can drive while maintaining specified timing?
The SN74LVC541ANS is characterized for loads ≤50pF, as stated in Section 8.2.1.1. Exceeding this capacitance increases propagation delay, worsens ground bounce (VOLP), and may cause timing violations or signal integrity issues. For loads >50pF, consider adding series damping resistors or using a higher-drive buffer - design guidance is provided in Figure 8-2 and Layout Section 8.4.
Does the SN74LVC541ANS support hot-swap or live-insertion applications?
Yes - the SN74LVC541ANS incorporates Ioff circuitry that disables all outputs and limits leakage to <±10μA when VCC = 0V, even with input or output voltages present up to 5.5V. This feature is explicitly validated per JESD78 latch-up testing and supports safe insertion/removal in powered backplanes or modular systems - detailed in Section 7.3.2 and Absolute Maximum Ratings.
SN74LVC541ANS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 20-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tube
- 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-SO
SN74LVC541ANS FAQ
1.How can I place an order for SN74LVC541ANS through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC541ANS 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 SN74LVC541ANS reliable?
The price and inventory of SN74LVC541ANS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC541ANS is usually 5 days.
3.What payment methods are accepted for SN74LVC541ANS?
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4.How is shipping managed for SN74LVC541ANS?
SN74LVC541ANS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC541ANS 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 SN74LVC541ANS?
For technical support, including SN74LVC541ANS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC541ANS requirements.
6.How does Aetrix verify that SN74LVC541ANS is sourced from the original manufacturer or authorized distributors?
All SN74LVC541ANS 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 SN74LVC541ANS meets industry standards.
7.What is the process for return or replacement of SN74LVC541ANS?
All SN74LVC541ANS units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC541ANS, 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 SN74LVC541ANS part is unused and in its original packaging.
Return procedure for SN74LVC541ANS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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