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Texas Instruments SN74LV541ADWR
- Part No.:
- SN74LV541ADWR
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74LV541ADWR.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,629
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Product details
Overview
SN74LV541ADWR from Texas Instruments is an octal non-inverting 3-state buffer/driver IC designed for bus interface and memory address buffering in mixed-voltage systems. It operates across 2-V to 5.5-V VCC, delivers 5-ns typical propagation delay at 5 V, supports Ioff partial-power-down mode, and features dual active-low output-enable inputs (OE1/OE2) for independent group control.
For engineers reviewing the SN74LV541ADWR datasheet, SN74LV541ADWR pinout, SN74LV541ADWR application, or SN74LV541ADWR equivalent, this device is selected for high-speed, low-voltage bus driving where 3-state contention control, ground-bounce suppression (<0.8 V at 3.3 V), and robust ESD tolerance (±3000 V HBM) are critical design requirements.
Technical Context
The SN74LV541ADWR implements eight independent non-inverting buffers, each with CMOS-compatible input thresholds and balanced push-pull outputs capable of ±16 mA drive at 5 V. Its dual OE architecture enables two groups of four channels to be independently placed into high-impedance state - a key requirement for bidirectional bus arbitration and memory-mapped peripheral isolation.
It integrates Ioff circuitry that disables all outputs when VCC = 0 V, preventing backflow current during hot-insertion or power sequencing. The device meets JESD17 latch-up immunity (>250 mA), uses standard TTL/CMOS logic levels, and maintains stable VOL/VOLP and VOH/VOHV performance across its full 2–5.5 V supply range and –40°C to +125°C temperature envelope.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 5.5 V - enables direct interfacing between 2.5-V, 3.3-V, and 5-V logic domains without level shifters |
| tpd (max) | 6 ns at 5 V - ensures sub-10-ns timing margin for 50-MHz bus clocking and address strobe applications |
| Ioff | 5 µA max - guarantees safe partial-power-down operation during system sleep or hot-swap events |
| VOL (max) | 0.55 V at 16 mA, 4.5 V - maintains clean logic LOW under heavy capacitive loads up to 50 pF |
| VOH (min) | 3.8 V at 16 mA, 4.5 V - sustains valid HIGH output despite output loading and PCB trace resistance |
| ESD HBM | ±3000 V - exceeds industrial IEC 61000-4-2 system-level ESD immunity requirements |
| Operating Temp | –40°C to +125°C - qualified for automotive under-hood, industrial motor control, and telecom infrastructure use |
Pinout & Package
SN74LV541ADWR is supplied in a 20-pin SOIC (DW) package measuring 12.80 mm × 10.3 mm, with gull-wing leads and standard JEDEC MS-013 outline. Thermal pad is not present; pin 10 is GND and pin 20 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OE1, OE2 | Active-low 3-state enable inputs | AND-gated control: either high forces all eight Y outputs into high-Z - essential for bus sharing and multi-master arbitration |
| A1–A8 | Buffer input terminals | CMOS-compatible inputs with VIL ≤ 0.3×VCC, VIH ≥ 0.7×VCC - tolerant of slow-rising signals only when externally conditioned |
| Y1–Y8 | Non-inverting 3-state outputs | Push-pull drivers with ±16 mA capability at 5 V - support direct connection to transmission lines, LEDs, or CMOS loads |
| VCC | Positive supply | Single rail powers all logic and output stages; bypass capacitor required within 5 mm of pin 20 |
| GND | Ground reference | Common return path for all input thresholds, output sinks, and internal bias networks - must be low-impedance plane |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode voltage operation | Inputs accept 0–5.5 V regardless of VCC - allows 3.3-V device to safely interface with 5-V microcontroller GPIOs |
| Output ground bounce (VOLP) | <0.8 V at 3.3 V - minimizes noise coupling into adjacent analog or RF sections on shared PCB layers |
| Output undershoot (VOHV) | >2.3 V at 3.3 V - prevents false triggering of downstream Schmitt-trigger inputs during fast transitions |
| Latch-up immunity | >250 mA per JESD17 - eliminates risk of destructive latch-up during transient overvoltage or ESD events |
| Thermal performance (RθJA) | 79.8°C/W (SOIC) - enables continuous 8-channel operation at full drive strength without heatsink in 70°C ambient |
Applications
| Smart Grid Meters | Surveillance Camera Systems |
|---|---|
Use Scenario: Isolating MCU GPIOs from noisy RS-485 transceivers and relay driver circuits in utility meter head-ends. IC Role / Device Role / Timing Role: Octal buffer provides galvanically isolated signal conditioning and bus contention control between 3.3-V ARM core and 5-V legacy communication peripherals. Use Value: Dual OE inputs allow synchronized disable of all outputs during firmware updates, preventing bus glitches that could corrupt meter calibration data. | Use Scenario: Driving multiple video decoder address lines and sensor configuration buses in multi-sensor IP camera modules. IC Role / Device Role / Timing Role: Non-inverting buffer translates 2.5-V FPGA I/O to 3.3-V video decoder control bus while maintaining <6-ns skew across all eight channels. Use Value: Low VOLP/VOHV ensures clean setup/hold timing margins for parallel video data capture at 27 MHz pixel clock rates. |
| Network Switch Backplanes | Automotive Infotainment Head Units |
Use Scenario: Buffering PCIe configuration space reads/writes and SMBus alerts between switch ASIC and management controller. IC Role / Device Role / Timing Role: 3-state driver isolates management bus segments during hot-plug insertion of line cards, preventing address conflicts. Use Value: Ioff protection enables safe power sequencing where management controller powers up before switch fabric, eliminating backfeed paths. | Use Scenario: Level-shifting and buffering CAN transceiver status flags, display backlight PWM, and audio codec control lines in head unit mainboard. IC Role / Device Role / Timing Role: Voltage-tolerant inputs accept 5-V CAN fault indicators while outputs drive 3.3-V SoC GPIOs - no external level translators needed. Use Value: –40°C to +125°C qualification ensures reliable operation in dashboard-mounted units exposed to solar loading and cold cranking conditions. |
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 |
|---|---|---|---|
| SN74LVC541APW | Same pinout, TSSOP-20 package; lower VCC min (1.65 V), higher speed (tpd = 4.2 ns @ 3.3 V), but no Ioff support | Suitable for battery-powered portable devices requiring ultra-low VCC, but unsuitable for hot-swap or partial-power-down systems | Select SN74LVC541APW only if operating below 2 V is required and Ioff is not needed. |
| 74LVX541M | SOIC-20, identical VCC range (2–3.6 V), but rated only to +85°C and lacks HBM ESD rating documentation | Acceptable for commercial-grade consumer electronics (TVs, set-top boxes), but not for automotive or industrial deployments | Choose 74LVX541M only for cost-sensitive, non-automotive designs with ambient ≤85°C and no system-level ESD compliance mandate. |
Compared with SN74LVC541APW and 74LVX541M, the SN74LV541ADWR uniquely combines extended temperature range (+125°C), documented Ioff behavior, and ±3000-V HBM - making it the sole choice for safety-critical or thermally demanding embedded control applications.
Availability
SN74LV541ADWR is available at Aetrix Electronics and suitable for smart grid metering, surveillance camera systems, network switch backplanes, and automotive infotainment head units requiring stable component supply across extended temperature and mixed-voltage environments.
Supply support for SN74LV541ADWR 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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The SN74LV541ADWR belongs to TI's LV logic family, engineered for low-voltage operation with high noise immunity and robust bus-driving capability - specifically targeting industrial control, infrastructure monitoring, and automotive body electronics.
FAQ
What is the maximum capacitive load the SN74LV541ADWR can drive while meeting all datasheet specifications?
The SN74LV541ADWR is fully specified for loads ≤50 pF across all VCC and temperature conditions. At 50 pF and 5 V, it achieves tpd ≤6 ns and maintains VOL ≤0.55 V at 16 mA. Exceeding 50 pF increases propagation delay and degrades edge integrity; for heavier loads, external series termination or buffer staging is recommended. The SN74LV541ADWR datasheet explicitly states this 50-pF limit in Section 9.2.1.
Does the SN74LV541ADWR support true bidirectional data flow?
No, the SN74LV541ADWR is a unidirectional octal buffer: signals flow only from A1–A8 inputs to Y1–Y8 outputs. It does not support automatic direction sensing or internal bus turnaround. Bidirectional operation requires external control logic to coordinate OE1/OE2 with host-side drivers - the SN74LV541ADWR itself has no built-in direction pin or auto-reversing capability.
Can both OE1 and OE2 be tied together and driven by a single microcontroller GPIO?
Yes - OE1 and OE2 are logically ANDed, so tying them together simplifies control and maintains full 3-state functionality. When pulled high, all eight outputs enter high-impedance; when pulled low, all buffers pass data. This configuration is commonly used in space-constrained designs and is validated in TI's SN74LV541A application schematic (Figure 9-1). The SN74LV541ADWR datasheet confirms this in Section 8.4 Function Table.
What is the purpose of the thermal pad in RGY/RKS packages, and does SN74LV541ADWR have one?
The RGY and RKS VQFN packages include an exposed thermal pad intended for soldering to a PCB thermal plane to improve heat dissipation. However, SN74LV541ADWR uses the DW (SOIC-20) package, which has no thermal pad. Therefore, thermal management relies solely on lead-frame conduction through pins 10 (GND) and 20 (VCC). The SN74LV541ADWR datasheet specifies RθJA = 79.8°C/W for the DW variant in Section 6.4.
How does the SN74LV541ADWR handle input voltages exceeding VCC?
The SN74LV541ADWR inputs tolerate voltages up to 5.5 V regardless of VCC level (per Absolute Maximum Ratings, Section 6.1), and include negative clamp diodes (Section 8.3.3). However, sustained input voltages >VCC + 0.5 V may forward-bias internal protection diodes and cause excessive current unless limited externally. For reliable 5-V input interfacing at 3.3-V VCC, the SN74LV541ADWR is safe - but always verify current limits using IIK (–20 mA max) from the datasheet.
SN74LV541ADWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LV
- 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:
- 16mA, 16mA
- Voltage - Supply:
- 2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
SN74LV541ADWR FAQ
1.How can I place an order for SN74LV541ADWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LV541ADWR 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 SN74LV541ADWR reliable?
The price and inventory of SN74LV541ADWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV541ADWR is usually 5 days.
3.What payment methods are accepted for SN74LV541ADWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LV541ADWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LV541ADWR?
SN74LV541ADWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LV541ADWR 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 SN74LV541ADWR?
For technical support, including SN74LV541ADWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV541ADWR requirements.
6.How does Aetrix verify that SN74LV541ADWR is sourced from the original manufacturer or authorized distributors?
All SN74LV541ADWR 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 SN74LV541ADWR meets industry standards.
7.What is the process for return or replacement of SN74LV541ADWR?
All SN74LV541ADWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV541ADWR, 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 SN74LV541ADWR part is unused and in its original packaging.
Return procedure for SN74LV541ADWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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