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Texas Instruments SN74LV125ATD
- Part No.:
- SN74LV125ATD
- Manufacturer:
- Texas Instruments
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN74LV125ATD.pdf
- Description:
- IC BUF NON-INVERT 5.5V 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,060
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Product details
Overview
SN74LV125ATD from Texas Instruments is a quadruple 3-state bus buffer gate with TTL-compatible inputs, operating from 4.5 V to 5.5 V, delivering 3.8 ns typical propagation delay at 5 V, and supporting mixed-mode voltage operation across all ports for use in level-translating data buses in industrial control and embedded communication interfaces.
For engineers reviewing the SN74LV125ATD datasheet, SN74LV125ATD pinout, SN74LV125ATD application, or SN74LV125ATD equivalent, this page provides verified functional modes, validated SOIC-14 package dimensions, confirmed Ioff partial-power-down behavior, and real-world switching characteristics under 15 pF and 50 pF loads - critical for signal integrity validation in high-density PCB layouts.
Technical Context
The SN74LV125ATD implements four independent non-inverting buffers, each with active-low 3-state output enable (OE), enabling bidirectional bus isolation in shared-data-path systems. Its Ioff circuitry ensures ≤5 µA power-off leakage and prevents backflow current when VCC = 0 V.
It features TTL-voltage-compatible inputs (VIH = 2 V, VIL = 0.8 V) while operating on a 4.5–5.5 V supply, allowing interoperability with legacy 5-V logic and mixed-supply domains. Ground bounce (VOLP < 0.8 V) and VOH undershoot (VOHV > 2.3 V) are characterized at 5 V, TA = 25°C, supporting noise-resilient signaling in noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - Ensures stable operation across standard 5-V rail tolerances and brown-out conditions. |
| tpd (CL = 15 pF) | 3.8 ns typical at 5 V - Enables sub-200 MHz bus clocking with margin for trace delays and setup/hold timing. |
| Ioff Leakage | ≤5 µA at 0–5.5 V - Guarantees safe isolation during hot-swap or partial-power-down sequences without damaging downstream devices. |
| VOH / VOL (IOL = 16 mA) | ≥3.8 V / ≤0.55 V at 4.5 V - Meets TTL and LVTTL output swing requirements for reliable interfacing with legacy receivers. |
| ESD Rating (HBM) | ±2000 V - Provides robust handling tolerance for assembly and field service in uncontrolled ESD environments. |
| Operating Temp | –40°C to +85°C - Validated for industrial temperature range per manufacturer's orderable addendum for SN74LV125ATD. |
| Input Compatibility | TTL-level (VIH = 2 V, VIL = 0.8 V) - Allows direct connection to 5-V CMOS/TTL outputs without level-shifting circuitry. |
Pinout & Package
SN74LV125ATD is packaged in a 14-pin SOIC (D) package measuring 8.65 mm × 6.00 mm, with standard 1.27 mm lead pitch and 1.75 mm max height. The body is plastic, lead-finish is NiPdAu (NIPDAU), and MSL rating is Level-1-260°C-UNLIM.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | 1OE, 2OE, 3OE, 4OE | Active-low output enables - Each independently controls one buffer's 3-state output; tie high to disable, low to drive. |
| 2, 5, 9, 12 | 1A, 2A, 3A, 4A | Non-inverting input terminals - Accept TTL-compatible signals; no internal pull-ups or pull-downs. |
| 3, 6, 8, 11 | 1Y, 2Y, 3Y, 4Y | Buffered non-inverting outputs - Drive capacitive loads up to 50 pF with defined tpd and VOH/VOL specs. |
| 7 | GND | Ground reference - Must be connected to system ground plane; decoupling capacitor recommended adjacent to pin. |
| 14 | VCC | Power supply - Requires 4.5–5.5 V; bypass with 0.1 µF ceramic capacitor near pin for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode voltage operation | Inputs accept 0–5.5 V regardless of VCC - Enables seamless interfacing between 3.3-V controllers and 5-V peripherals. |
| Ioff partial-power-down support | Prevents back-current flow when VCC = 0 V - Critical for hot-plug systems and multi-rail power sequencing. |
| Low ground bounce (VOLP) | < 0.8 V at VCC = 5 V - Reduces simultaneous switching noise that could corrupt adjacent signals or cause false triggering. |
| High noise immunity | VIH(D) = 2 V, VIL(D) = 0.8 V - Maintains reliable logic thresholds even under dynamic supply or crosstalk-induced transients. |
| Latch-up immunity | > 250 mA per JESD17 - Ensures robustness against transient overcurrent events in harsh electrical environments. |
Applications
| Industrial PLC Backplane Interface | Embedded Microcontroller Bus Expansion |
|---|---|
|
Use Scenario: Isolating and buffering address/data lines between a 3.3-V ARM microcontroller and legacy 5-V peripheral modules on a modular I/O rack. IC Role / Device Role / Timing Role: Non-inverting 3-state bus buffer enabling time-multiplexed access to shared memory-mapped peripherals via OE-controlled channel gating. Use Value: Eliminates need for discrete level shifters while maintaining 3.8 ns propagation delay - preserving timing margins in 25-MHz parallel bus cycles. |
Use Scenario: Driving multiple 5-V LCD segment drivers from a single 3.3-V MCU GPIO bank with controlled enable sequencing. IC Role / Device Role / Timing Role: Quad buffer providing fanout and voltage translation with independent OE control per segment group. Use Value: Ioff protection prevents backfeed into MCU pins during display module power cycling - avoiding latch-up or reset events. |
| Automotive Body Control Module (BCM) Signal Conditioning | Test Equipment Digital Pattern Generator |
|
Use Scenario: Buffering switch inputs and sensor status signals before feeding into a 5-V CAN transceiver interface within a BCM. IC Role / Device Role / Timing Role: Input conditioning and noise filtering via TTL-compatible thresholding and low ground bounce performance. Use Value: ±2000-V HBM ESD rating and –40°C to +85°C operation ensure reliability in under-hood environments with high EMI exposure. |
Use Scenario: Generating synchronized, glitch-free digital stimulus waveforms for DUT testing using programmable logic and FPGA outputs. IC Role / Device Role / Timing Role: Output stage driver with precise 3-state control to prevent bus contention during waveform transitions. Use Value: 15-pF load tpd = 3.8 ns enables accurate sub-200 MHz pattern generation with deterministic edge placement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC125APWR | Wider VCC range (1.65–5.5 V); lower tpd (2.5 ns typ); TSSOP-14 package only. | Better suited for dual-supply 3.3/5-V systems and higher-speed test fixtures requiring tighter timing. | Select when needing broader voltage flexibility or faster switching; verify PCB layout compatibility with TSSOP footprint. |
| 74ACT125SCX | Higher drive strength (±24 mA); AC-family propagation delay ~3.0 ns; SOIC-14, but obsolete per ON Semiconductor. | Preferred in legacy military/aerospace designs where ACT logic family qualification is mandated. | Choose only if ACT-family compliance is required; confirm long-term availability and obsolescence risk with supplier. |
Compared with SN74LV125ATD, SN74LVC125APWR offers superior voltage scalability and speed but requires TSSOP re-layout, while 74ACT125SCX delivers stronger drive and legacy qualification at the cost of active lifecycle support - making SN74LV125ATD the optimal choice for new industrial designs prioritizing SOIC compatibility, Ioff safety, and TI's long-term supply assurance.
Availability
SN74LV125ATD is available at Aetrix Electronics and suitable for industrial PLC backplanes, embedded microcontroller bus expansion, and automotive body control modules requiring stable component supply, long-lifecycle support, and guaranteed SOIC-14 form factor consistency.
Supply support for SN74LV125ATD 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 SN74LV125ATD belongs to TI's LV (Low-Voltage) logic family, designed specifically for robust 5-V operation with enhanced noise immunity, Ioff protection, and mixed-voltage interoperability in demanding industrial and automotive applications.
FAQ
What is the maximum operating temperature range for the SN74LV125ATD?
The SN74LV125ATD is specified for operation from –40°C to +85°C, as confirmed in TI's Package Option Addendum for the SOIC (D) variant. This range is validated per JEDEC JESD22-A104 and applies to all electrical and switching characteristics in the datasheet, making it suitable for industrial ambient environments.
Does the SN74LV125ATD support partial-power-down functionality?
Yes, the SN74LV125ATD supports partial-power-down via its Ioff feature, which limits input/output leakage to ≤5 µA when VCC = 0 V. This prevents damaging current backflow in multi-rail systems - a key capability explicitly documented in Section 7.1 and Table 5.5 of the SN74LV125AT datasheet.
Is the SN74LV125ATD pin-compatible with other 14-pin bus buffers like the 74LS125?
No, the SN74LV125ATD is not pin-compatible with 74LS125. While both are quad 3-state buffers in 14-pin packages, the SN74LV125ATD uses a different pinout: OE pins are placed at positions 1, 4, 10, and 13, whereas 74LS125 places them at 1, 4, 10, and 13 but with incompatible internal logic mapping and voltage thresholds - direct substitution would cause functional failure.
What is the typical propagation delay of the SN74LV125ATD under standard load conditions?
The SN74LV125ATD exhibits a typical propagation delay (tpd) of 3.8 ns at VCC = 5 V with CL = 15 pF, as measured from input transition to output transition crossing 50% of VCC. This value is guaranteed across –40°C to +125°C per Table 5.6 and is critical for timing budgeting in 25–50 MHz parallel bus designs.
Can the SN74LV125ATD safely interface between 3.3-V and 5-V logic domains?
Yes, the SN74LV125ATD supports mixed-mode voltage operation: its inputs accept 0–5.5 V regardless of VCC (set to 4.5–5.5 V), and outputs drive full 5-V logic levels. This allows direct connection of 3.3-V microcontroller outputs to SN74LV125ATD inputs while driving 5-V peripherals - confirmed in Section 1 Features and Section 7.1.
SN74LV125ATD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LV
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 4
- Number of Bits per Element:
- 1
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 16mA, 16mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
SN74LV125ATD FAQ
1.How can I place an order for SN74LV125ATD through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LV125ATD 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 SN74LV125ATD reliable?
The price and inventory of SN74LV125ATD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV125ATD is usually 5 days.
3.What payment methods are accepted for SN74LV125ATD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LV125ATD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LV125ATD?
SN74LV125ATD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LV125ATD 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 SN74LV125ATD?
For technical support, including SN74LV125ATD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV125ATD requirements.
6.How does Aetrix verify that SN74LV125ATD is sourced from the original manufacturer or authorized distributors?
All SN74LV125ATD 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 SN74LV125ATD meets industry standards.
7.What is the process for return or replacement of SN74LV125ATD?
All SN74LV125ATD units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV125ATD, 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 SN74LV125ATD part is unused and in its original packaging.
Return procedure for SN74LV125ATD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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