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Texas Instruments SN74LVC541APWT
- Part No.:
- SN74LVC541APWT
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVC541APWT.pdf
- Description:
- IC BUF NON-INVERT 3.6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,698
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Product details
Overview
SN74LVC541APWT 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 SN74LVC541APWT datasheet, SN74LVC541APWT pinout, SN74LVC541APWT application, or SN74LVC541APWT equivalent, key selection criteria include 3-state timing margins, mixed-voltage interface capability (5V inputs into 3.3V VCC), thermal performance in TSSOP-20, and compatibility with high-speed PCB trace routing up to 12 cm.
Technical Context
The SN74LVC541APWT implements eight independent CMOS buffers sharing two synchronized active-low enable inputs (OE1 and OE2), requiring both to be low for output activation-enabling precise bus arbitration. Its balanced push-pull outputs drive ±24mA at 3V while maintaining VOL ≤ 0.55V and VOH ≥ 2.2V under load.
It supports partial power-down via Ioff, limiting leakage to ±10μA when VCC = 0V, and tolerates input voltages up to 5.5V regardless of VCC-enabling safe interfacing between 5V legacy peripherals and 3.3V logic domains without level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V to 3.6V - Enables operation across LVC-family voltage rails including 1.8V, 2.5V, and 3.3V systems. |
| Input Voltage Tolerance | Up to 5.5V - Allows direct connection to 5V signals without external clamping or translation. |
| tpd (Max) | 5.1ns at VCC = 3.3V - Supports >100MHz signal redriving on short traces with tight timing budgets. |
| Ioff Leakage | ±10μA at VCC = 0V - Permits hot-plug insertion into powered-backplane systems without bus contention. |
| Output Drive | ±24mA at VCC = 3V - Sustains robust edge rates into 50pF loads per channel, meeting transmission-line drive requirements. |
| ESD Rating | ±2000V HBM - Meets industrial-grade ESD immunity for board-level handling and field deployment. |
| Operating Temp | –40°C to +125°C - Qualified for extended-temperature automotive and industrial embedded applications. |
Pinout & Package
TSSOP-20 package (PW), 6.5mm × 6.4mm body size, 0.65mm pitch, thermally enhanced with exposed pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OE1, OE2 | Active-low dual enables - both must be low to activate all eight outputs; enables synchronous bus gating. |
| 2–9 | A1–A8 | Buffer inputs - accept 5.5V-tolerant logic signals; standard CMOS inputs with ≤4pF capacitance. |
| 10 | GND | Ground reference - shared return path for all I/O and supply currents; requires low-inductance layout. |
| 11–18 | Y1–Y8 | 3-state outputs - actively drive high/low or enter high-Z; balanced sourcing/sinking supports bidirectional bus use. |
| 20 | VCC | Power supply - 1.65–3.6V rail; requires local 0.1μF bypass capacitor adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal operation | 5V inputs accepted with 3.3V VCC - eliminates external level translators in heterogeneous voltage systems. |
| Low ground bounce (VOLP) | <0.8V typical at VCC = 3.3V - reduces noise coupling into adjacent signals during simultaneous switching. |
| Output undershoot control (VOHV) | >2V typical at VCC = 3.3V - maintains signal integrity during fast transitions into capacitive loads. |
| Latch-up immunity | >100mA per JESD78 - ensures robustness against transient overcurrent events in noisy environments. |
| Thermal pad option | RKS/VQFN variants include thermal pad - improves θJA by up to 40% vs. TSSOP for high-duty-cycle applications. |
Applications
| Industrial Backplane Interface | FPGA I/O Expansion |
|---|---|
Use Scenario: Redriving parallel address/data buses between PLC CPU and modular I/O cards over 10cm PCB traces. IC Role / Device Role / Timing Role: Octal buffer providing timing-controlled 3-state isolation and signal integrity restoration across long traces. Use Value: Enables reliable 50MHz bus operation without added termination or delay compensation due to 5.1ns tpd and 50pF load tolerance. |
Use Scenario: Extending FPGA GPIO count to drive multiple LED indicators, relays, and sensor interfaces. IC Role / Device Role / Timing Role: Non-inverting 3-state driver buffering FPGA outputs while supporting hot-swap-safe Ioff behavior. Use Value: Eliminates need for discrete pull-ups and enables dynamic reconfiguration of peripheral connections without system reset. |
| Automotive Body Control Module | Test Equipment Signal Conditioning |
Use Scenario: Isolating microcontroller GPIOs from 12V-compatible sensors and actuators via level-shifted control lines. IC Role / Device Role / Timing Role: Voltage-tolerant buffer enabling 3.3V MCU to safely drive 5V-tolerant loads without damage risk. Use Value: Achieves 5.5V input tolerance at 3.3V VCC, removing external protection diodes and reducing BOM count. |
Use Scenario: Driving calibrated test signals onto DUT inputs with controlled rise/fall times and impedance matching. IC Role / Device Role / Timing Role: Precision redriver ensuring signal fidelity across variable capacitive loads up to 50pF. Use Value: Maintains <1ns skew between channels and supports source termination via series damping resistors per layout guidelines. |
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 die, identical electrical specs and pinout; differs only in TI's internal part numbering convention (no '7' prefix in orderable number). | No functional difference - used interchangeably in same designs; full drop-in replacement with identical TSSOP-20 footprint. | Select based on distributor stock availability; no design change required. |
| SN74LVCH16244APAG | 16-channel, higher drive (±32mA), LVCH family with bus-hold inputs; larger 48-pin TSSOP package. | Used where channel count or bus-hold functionality is required; not pin-compatible - requires PCB redesign. | Choose only when scaling beyond 8 channels or needing automatic input state retention without external pull resistors. |
Compared with 74LVC541APW, SN74LVC541APWT offers identical performance and compatibility; versus SN74LVCH16244APAG, it trades channel density and bus-hold for compact 20-pin integration and lower system-level component count.
Availability
SN74LVC541APWT is available at Aetrix Electronics and suitable for industrial automation backplanes, FPGA I/O expansion, automotive body control modules, and test equipment signal conditioning requiring stable component supply across extended temperature ranges.
Supply support for SN74LVC541APWT 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, embedded processing, and connectivity solutions with over 90 years of innovation in industrial, automotive, and communications markets.
The SN74LVC541APWT belongs to TI's LVC logic family-designed specifically for low-voltage, high-speed, mixed-signal interfacing in space-constrained, thermally demanding applications.
FAQ
What is the maximum capacitive load the SN74LVC541APWT can drive while maintaining datasheet timing specs?
The SN74LVC541APWT is specified to drive loads ≤50pF while meeting all switching characteristics-including 5.1ns max tpd at 3.3V. Exceeding 50pF increases propagation delay and may cause signal integrity issues like ringing or undershoot; layout best practices recommend keeping trace lengths under 12 cm and using series damping resistors for longer runs. The SN74LVC541APWT datasheet explicitly states this 50pF limit in Section 8.2.1.1.
Does the SN74LVC541APWT support hot-swap or live-insertion in powered systems?
Yes-the SN74LVC541APWT supports live insertion via its Ioff feature: when VCC = 0V, input and output leakage is limited to ±10μA, preventing back-driving or bus contention. This allows safe insertion into a powered backplane without disrupting other devices. The SN74LVC541APWT's Ioff specification is verified per JEDEC JESD78 and appears in Section 5.5 of its datasheet.
Can the SN74LVC541APWT interface directly between a 5V microcontroller and a 3.3V FPGA?
Yes-the SN74LVC541APWT accepts input voltages up to 5.5V while operating from a 3.3V VCC, enabling direct 5V-to-3.3V level translation without external components. Its inputs are 5V-tolerant CMOS, and outputs swing rail-to-rail (0V to 3.3V), making it ideal for bridging legacy 5V peripherals to modern 3.3V logic. This capability is documented in Section 1 (Features) and Section 5.3 (Recommended Operating Conditions) of the SN74LVC541APWT datasheet.
What is the function of the dual output-enable pins (OE1 and OE2) on the SN74LVC541APWT?
The SN74LVC541APWT requires both OE1 and OE2 to be driven low simultaneously to enable all eight outputs; if either is high, all outputs go high-impedance. This dual-enable architecture provides redundancy and noise immunity-preventing accidental bus activation from single-point glitches. The logic table in Section 7.4 confirms that only the "L,L" combination yields active outputs. This design is unique to the SN74LVC541APWT within the LVC541A family.
Is the thermal pad on the SN74LVC541APWT package electrically connected?
No-the SN74LVC541APWT uses the PW (TSSOP-20) package, which does not include a thermal pad. Thermal pad functionality is exclusive to RKS and RGY VQFN variants of the SN74LVC541A family. The PW package relies on standard lead-frame conduction; its θJA is 120.3°C/W per Section 5.4. Confusion may arise because Figures 4-3 and 4-4 show different packages-only RKS has the thermal pad noted in Pin Functions.
SN74LVC541APWT 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
SN74LVC541APWT FAQ
1.How can I place an order for SN74LVC541APWT through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC541APWT 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 SN74LVC541APWT reliable?
The price and inventory of SN74LVC541APWT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC541APWT is usually 5 days.
3.What payment methods are accepted for SN74LVC541APWT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC541APWT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC541APWT?
SN74LVC541APWT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC541APWT 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 SN74LVC541APWT?
For technical support, including SN74LVC541APWT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC541APWT requirements.
6.How does Aetrix verify that SN74LVC541APWT is sourced from the original manufacturer or authorized distributors?
All SN74LVC541APWT 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 SN74LVC541APWT meets industry standards.
7.What is the process for return or replacement of SN74LVC541APWT?
All SN74LVC541APWT units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC541APWT, 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 SN74LVC541APWT part is unused and in its original packaging.
Return procedure for SN74LVC541APWT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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