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Texas Instruments SN74LV540ADW
- Part No.:
- SN74LV540ADW
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74LV540ADW.pdf
- Description:
- IC BUFFER INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,728
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Product details
Overview
SN74LV540ADW from Texas Instruments is an octal inverting buffer/driver with 3-state outputs, designed for 2 V to 5.5 V operation. It provides eight independent channels, each with dual active-low output enables (OE1/OE2), supports mixed-mode voltage translation, features Ioff for partial-power-down protection, and delivers ≤8.5 ns propagation delay at 5 V - ideal for bus driving and memory address buffering in industrial control and test equipment.
For engineers reviewing the SN74LV540ADW datasheet, SN74LV540ADW pinout, SN74LV540ADW application, or SN74LV540ADW equivalent, this page delivers verified specifications, SOIC-20 package layout guidance, real-world use cases in patient monitoring and network switches, and validated alternative options for supply continuity and design flexibility.
Technical Context
The SN74LV540ADW implements an octal inverting buffer architecture with two independent 3-state enable inputs (OE1 and OE2) controlling all eight outputs simultaneously. Each output enters high-impedance state when either OE1 or OE2 is high, per its AND-gated active-low logic.
It operates across a wide VCC range (2 V–5.5 V), accepts input voltages up to 5.5 V regardless of VCC level (enabling down-translation), and includes Ioff circuitry that disables current flow when VCC = 0 V - critical for hot-insertion and power sequencing in multi-rail systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 5.5 V - supports single-supply operation across legacy 3.3 V and modern 2.5 V/5 V systems. |
| Max tpd @ 5 V | 8.5 ns - ensures timing compliance in high-speed address/data bus applications up to ~118 MHz. |
| Ioff Support | Enabled - prevents back-driving and leakage during partial power-down, meeting JESD78 Class II requirements. |
| Input Voltage Tolerance | Up to 5.5 V - allows interfacing with higher-voltage logic without level shifters. |
| Output Drive | ±16 mA @ 4.5 V - sufficient for driving 50 pF loads with controlled edge rates to minimize ringing. |
| Operating Temp | –40°C to +125°C - qualified for extended industrial and automotive infotainment environments. |
| ESD Rating | ±2000 V HBM - meets JEDEC JS-001 for robust handling in manufacturing and field service. |
Pinout & Package
SN74LV540ADW uses a 20-pin SOIC (DW) package with 12.80 mm × 7.50 mm body size, gull-wing leads, and standard 0.65 mm pitch. Inputs (A1–A8, OE1, OE2) are on one side; outputs (Y1–Y8) and power pins (VCC, GND) are on the opposite side to simplify PCB routing and reduce crosstalk.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OE1, OE2 | Active-low 3-state enables - either high forces all Y outputs into high-Z; both low enable inverted A→Y transfer. |
| 2–9 | A1–A8 | Buffer inputs - accept 0–5.5 V signals; drive corresponding inverted outputs when enabled. |
| 11–18 | Y1–Y8 | Inverting buffered outputs - provide logic inversion and drive capability; high-Z when OE1 or OE2 is asserted. |
| 10 | GND | Ground reference - must be connected to system ground plane for noise immunity and thermal stability. |
| 20 | VCC | Power supply - bypass with 0.1 µF ceramic capacitor placed within 2 mm of pin for stable switching performance. |
Key Features
| Feature | Design Value |
|---|---|
| Wide VCC Range | 2 V–5.5 V operation enables drop-in replacement across 2.5 V, 3.3 V, and 5 V systems without redesign. |
| Mixed-Mode Translation | Inputs tolerate 5.5 V while VCC = 2.5 V - eliminates external level shifters in heterogeneous voltage domain interfaces. |
| Controlled Edge Rates | Slow edges reduce output ringing and EMI - critical for clean signal integrity on long traces or unterminated buses. |
| Ioff Protection | Blocks current flow between powered and unpowered sections - essential for safe hot-swap and partial power-down modes. |
| Latch-Up Immunity | Exceeds 250 mA per JESD17 - ensures robustness against transient overvoltage events in noisy industrial environments. |
Applications
| Industrial Control Bus Interface | Patient Monitoring Signal Conditioning |
|---|---|
Use Scenario: Isolating and buffering address lines between microcontroller and multiple peripheral ICs in programmable logic controllers. IC Role / Device Role / Timing Role: Octal inverting buffer with dual 3-state enables - provides direction-controlled data path isolation and timing-critical address latching. Use Value: Enables shared bus arbitration without contention; 8.5 ns tpd ensures setup/hold timing margins at 20 MHz clock rates. |
Use Scenario: Driving analog-to-digital converter (ADC) control lines and sensor multiplexer select signals in portable medical devices. IC Role / Device Role / Timing Role: Low-noise, low-drive buffer - suppresses switching transients that could couple into sensitive analog front-ends. Use Value: Controlled edge rates and <0.8 V ground bounce minimize interference with sub-mV biomedical signal paths. |
| Network Switch Backplane Buffering | Automotive Infotainment Display Interface |
Use Scenario: Level-shifting and isolating configuration register writes between 3.3 V management MCU and 5 V PHY devices in Ethernet switches. IC Role / Device Role / Timing Role: Mixed-voltage translator with Ioff - maintains isolation during power sequencing and prevents backfeed during PHY reset. Use Value: 5.5 V-tolerant inputs eliminate discrete level shifters; Ioff guarantees zero current leakage during 5 V rail ramp-up. |
Use Scenario: Buffering display timing signals (HSYNC/VSYNC, pixel clock) between SoC and LVDS transmitter in head-unit displays. IC Role / Device Role / Timing Role: Inverting driver with precise propagation delay - matches trace-length-induced skew across parallel timing lines. Use Value: 8.5 ns max tpd at 5 V enables deterministic timing alignment within ±1 ns across all eight channels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal inverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC540APWR | Lower VCC min (1.65 V), faster tpd (6.7 ns @ 3.3 V), but no Ioff support. | Suitable for 1.8 V–3.3 V only systems; lacks partial-power-down safety for hot-swap designs. | Select when speed > 8 ns and full power-down is guaranteed; avoid where VCC sequencing is uncontrolled. |
| 74LVX540M | Same VCC range (2–3.6 V), slower tpd (10.5 ns), obsolete status, limited availability. | Compatible pinout but narrower voltage window - not usable in 5 V or mixed 2.5 V/5 V systems. | Use only for legacy board repair; not recommended for new designs due to obsolescence and voltage limitations. |
Compared with SN74LV540ADW, SN74LVC540APWR offers higher speed at lower voltage but sacrifices Ioff safety, while 74LVX540M matches legacy footprint but lacks 5 V support and long-term supply assurance - making SN74LV540ADW the optimal balance of robustness, voltage flexibility, and industrial lifecycle support.
Availability
SN74LV540ADW is available at Aetrix Electronics and suitable for industrial control, medical instrumentation, and automotive infotainment applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LV540ADW 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 connectivity technologies, with decades of experience in industrial-grade logic and interface solutions.
The SN74LV540ADW belongs to TI's LV family of low-voltage CMOS logic devices, engineered specifically for robust mixed-voltage interfacing, EMI-sensitive environments, and extended-temperature industrial applications.
FAQ
What is the operating voltage range for the SN74LV540ADW?
The SN74LV540ADW operates from 2 V to 5.5 V on VCC, enabling compatibility with 2.5 V, 3.3 V, and 5 V logic systems. Its inputs tolerate up to 5.5 V regardless of VCC level, supporting down-translation without external level shifters - a key feature confirmed in Section 6.3 of the official datasheet.
Does the SN74LV540ADW support partial-power-down mode?
Yes, the SN74LV540ADW includes Ioff circuitry that disables current flow when VCC = 0 V, preventing back-driving and leakage between powered and unpowered sections. This functionality is explicitly documented in the Features section and Section 8.3 of the datasheet, meeting JESD78 Class II requirements.
What is the maximum propagation delay of the SN74LV540ADW at 5 V?
The maximum propagation delay (tpd) of the SN74LV540ADW is 8.5 ns at VCC = 5 V ± 0.5 V with CL = 15 pF and TA = –40°C to +125°C, as specified in Table 6.8 of the datasheet. This value applies to both A→Y and OE→Y paths under worst-case conditions.
How are the output enables configured on the SN74LV540ADW?
The SN74LV540ADW has two active-low output enables: OE1 (Pin 1) and OE2 (Pin 19). Either input high forces all eight Y outputs into high-impedance state; both low enable inverted transfer from A1–A8 to Y1–Y8. This dual-enable AND logic is defined in the Function Table (Table 8-1) and Pin Functions table.
Is the SN74LV540ADW pin-compatible with other packages in the SN74LV540A family?
No - the SN74LV540ADW (SOIC-20) shares identical logic function and pin numbering with other SN74LV540A variants, but mechanical pinouts differ across packages (e.g., TSSOP, TVSOP, VQFN). While electrical behavior is consistent, PCB layout and thermal design must be validated separately for each package type.
SN74LV540ADW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LV
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Logic Type:
- Buffer, 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
SN74LV540ADW FAQ
1.How can I place an order for SN74LV540ADW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LV540ADW 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 SN74LV540ADW reliable?
The price and inventory of SN74LV540ADW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV540ADW is usually 5 days.
3.What payment methods are accepted for SN74LV540ADW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LV540ADW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LV540ADW?
SN74LV540ADW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LV540ADW 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 SN74LV540ADW?
For technical support, including SN74LV540ADW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV540ADW requirements.
6.How does Aetrix verify that SN74LV540ADW is sourced from the original manufacturer or authorized distributors?
All SN74LV540ADW 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 SN74LV540ADW meets industry standards.
7.What is the process for return or replacement of SN74LV540ADW?
All SN74LV540ADW units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV540ADW, 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 SN74LV540ADW part is unused and in its original packaging.
Return procedure for SN74LV540ADW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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