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Texas Instruments SN74LV125ATDBE4
- Part No.:
- SN74LV125ATDBE4
- Manufacturer:
- Texas Instruments
- Package:
- 14-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
SN74LV125ATDBE4.pdf
- Description:
- IC BUF NON-INVERT 5.5V 14SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,286
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Product details
Overview
SN74LV125AT from Texas Instruments is a quadruple 3-state bus buffer gate used for bidirectional data isolation and bus driving in digital logic systems. It operates from 4.5 V to 5.5 V, delivers 3.8 ns typical propagation delay at 5 V, supports mixed-mode voltage operation across all ports, and features Ioff for partial-power-down protection. It is commonly deployed in industrial control backplanes and microcontroller peripheral expansion interfaces.
For engineers reviewing the SN74LV125AT datasheet, SN74LV125AT pinout, SN74LV125AT application, or SN74LV125AT equivalent, key selection criteria include 3-state output timing (tpd ≤ 5.5 ns), Ioff leakage (< 5 µA), TTL-compatible inputs, and SOIC/SSOP/TSSOP/VQFN package compatibility with 14-pin footprint constraints.
Technical Context
The SN74LV125AT implements four independent non-inverting buffers, each with active-low 3-state output enable (OE). Its logic function follows a simple truth table: when OE = L, Y = A; when OE = H, Y = high-impedance. All inputs tolerate TTL-level voltages (VIH ≥ 2 V, VIL ≤ 0.8 V) while operating on a 4.5–5.5 V supply.
It integrates Ioff circuitry that disables outputs and limits input/output leakage to ≤5 µA during power-off conditions, enabling safe hot-insertion in multi-rail systems. Ground bounce (VOLP < 0.8 V) and VOH undershoot (VOHV > 2.3 V) are characterized at 5 V and 25°C, supporting noise-resilient signal integrity in dense PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - Ensures compatibility with standard 5-V TTL and mixed-voltage logic domains. |
| tpd (Typical) | 3.8 ns at VCC = 5 V, CL = 15 pF - Enables reliable operation in 100+ MHz bus timing budgets. |
| Ioff Leakage | ≤5 µA at VI/VO = 0–5.5 V - Prevents backflow current during partial power-down or hot-swap events. |
| Input Compatibility | TTL-voltage compatible (VIH ≥ 2 V, VIL ≤ 0.8 V) - Allows direct interfacing with legacy 5-V CMOS and bipolar logic families. |
| Output Drive | ±16 mA at VCC = 4.5–5.5 V - Sufficient to drive 10–15 pF loads per output without external buffering. |
| Operating Temperature | –40°C to +125°C - Qualified for extended industrial and automotive under-hood environments. |
| ESD Rating | ±2000 V HBM - Meets JEDEC JS-001 for robust handling in automated assembly lines. |
Pinout & Package
SN74LV125AT is available in five surface-mount packages: SOIC (D), SSOP (DB), SOP (NS), TSSOP (PW), and VQFN (RGY). The 14-pin layout is consistent across variants, with pin 1 designated by index area marking and corner chamfer. Thermal pad on RGY variant must be soldered for mechanical stability and thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | OE1–OE4 | Active-low 3-state enable inputs - Tie high via pullup to ensure Hi-Z at power-up. |
| 2, 5, 9, 12 | A1–A4 | Buffer input terminals - Accept TTL-compatible signals; high-impedance when not driven. |
| 3, 6, 8, 11 | Y1–Y4 | Non-inverting 3-state outputs - Drive bus lines only when corresponding OE is low. |
| 7 | GND | Ground reference - Must be connected to system ground plane with low-inductance path. |
| 14 | VCC | Power supply - Requires local 0.1 µF ceramic decoupling adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode voltage operation | Inputs and outputs support voltage translation between 3.3-V and 5-V domains without level shifters. |
| Ioff partial-power-down support | Prevents damaging current flow when VCC = 0 V, enabling safe insertion into live backplanes. |
| Low ground bounce (VOLP) | <0.8 V at 5 V - Reduces simultaneous switching noise in multi-output configurations. |
| Controlled VOH undershoot (VOHV) | >2.3 V at 5 V - Maintains valid logic-high margin during fast edge transitions. |
| Latch-up immunity | Exceeds 250 mA per JESD17 - Ensures robustness against transient overcurrent events. |
Applications
| Industrial PLC Backplane Interface | Microcontroller Peripheral Expansion |
|---|---|
Use Scenario: Isolating address/data buses between CPU module and modular I/O cards in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional 3-state buffer enabling time-multiplexed bus sharing among multiple slave modules. Use Value: Eliminates need for discrete bus transceivers; tpd ≤ 5.5 ns ensures deterministic cycle timing at 20-MHz bus clock rates. |
Use Scenario: Expanding GPIO count of an ARM Cortex-M4 MCU by connecting parallel peripherals (ADCs, DACs, LCD controllers). IC Role / Device Role / Timing Role: Level-shifting and fan-out buffer for 5-V tolerant peripheral interfaces while maintaining MCU's 3.3-V core logic levels. Use Value: Mixed-mode operation allows direct connection without external level translators; Ioff prevents backfeed during MCU sleep modes. |
| Automotive Body Control Module | Test Equipment Signal Routing |
Use Scenario: Managing shared diagnostic and sensor data lines across multiple ECUs in body electronics subsystems. IC Role / Device Role / Timing Role: Bus isolator enabling selective activation of CAN/LIN transceivers and analog sensor front-ends. Use Value: –40°C to +125°C rating meets AEC-Q100 Grade 2 requirements; ±2000-V HBM ESD withstand protects against assembly and field handling stress. |
Use Scenario: Reconfigurable signal routing matrix in automated test equipment for DUT interface adaptation. IC Role / Device Role / Timing Role: Programmable bus switch controlled by FPGA logic to route stimulus/response signals between test instruments and device pins. Use Value: Four independent channels allow concurrent routing of up to four signal pairs; 3-state outputs prevent contention during reconfiguration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC125A | Lower VCC range (1.65–3.6 V); faster tpd (2.5 ns typ at 3.3 V); no TTL input compatibility. | Designed for 3.3-V-only systems; unsuitable for 5-V legacy bus interfacing. | Select when operating exclusively in 3.3-V domains and higher speed is required. |
| 74ACT125 | Higher drive strength (±24 mA); wider VCC range (4.5–5.5 V); identical pinout and logic function. | Higher power consumption (ICC up to 80 µA); less robust Ioff behavior (not specified). | Choose for legacy 5-V systems requiring stronger output drive where Ioff is not critical. |
Compared with SN74LV125AT, SN74LVC125A offers better speed in low-voltage designs but lacks 5-V tolerance, while 74ACT125 provides higher drive and same pinout but sacrifices Ioff protection and increases static current-making SN74LV125AT optimal for mixed-voltage, power-aware industrial interfaces.
Availability
SN74LV125AT is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and embedded test equipment requiring stable component supply across SOIC, SSOP, TSSOP, and VQFN package variants.
Supply support for SN74LV125AT 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 SN74LV125AT belongs to TI's LV family of low-voltage, 5-V-tolerant logic devices engineered for robust interoperability in mixed-signal industrial and automotive control systems.
FAQ
What is the maximum operating temperature for SN74LV125AT?
The SN74LV125AT is rated for continuous operation from –40°C to +125°C across all package variants. This specification is validated per JEDEC JESD78 and applies to both SOIC and VQFN packages, making SN74LV125AT suitable for under-hood automotive and high-temperature industrial environments where thermal derating is critical.
Does SN74LV125AT support 3.3-V input signals when powered at 5 V?
Yes, SN74LV125AT supports 3.3-V input signals when VCC = 5 V due to its TTL-compatible input thresholds (VIH ≥ 2 V, VIL ≤ 0.8 V). This enables direct interfacing with 3.3-V microcontrollers or FPGAs without level shifters, and is explicitly confirmed in Section 5.3 of the SN74LV125AT datasheet.
How does the Ioff feature function in SN74LV125AT?
The Ioff feature in SN74LV125AT disables all outputs and limits input/output leakage to ≤5 µA when VCC = 0 V, preventing current backflow from live buses into a powered-down device. This behavior is guaranteed across –40°C to +125°C and is essential for hot-swap-capable backplane designs using SN74LV125AT.
Which package options are currently active for SN74LV125AT?
Active SN74LV125AT packages include SSOP (DB), SOIC (D), SOP (NS), TSSOP (PW), and VQFN (RGY), all listed as "Active" in TI's Package Option Addendum. Obsolete variants like SN74LV125ATD and SN74LV125ATPWT are discontinued and not supported for new designs.
Can SN74LV125AT replace 74LS125 in existing 5-V designs?
SN74LV125AT can replace 74LS125 in most 5-V designs due to matching pinout, identical logic function, and TTL-compatible inputs. However, SN74LV125AT offers lower power (ICC ≤ 20 µA vs. ~25 mA for LS), faster speed (3.8 ns vs. ~15 ns), and Ioff support-requiring verification of load capacitance and termination in legacy layouts.
SN74LV125ATDBE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LV
- Package/Case:
- 14-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- 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-SSOP
SN74LV125ATDBE4 FAQ
1.How can I place an order for SN74LV125ATDBE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LV125ATDBE4 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 SN74LV125ATDBE4 reliable?
The price and inventory of SN74LV125ATDBE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV125ATDBE4 is usually 5 days.
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Once your SN74LV125ATDBE4 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 SN74LV125ATDBE4?
For technical support, including SN74LV125ATDBE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV125ATDBE4 requirements.
6.How does Aetrix verify that SN74LV125ATDBE4 is sourced from the original manufacturer or authorized distributors?
All SN74LV125ATDBE4 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 SN74LV125ATDBE4 meets industry standards.
7.What is the process for return or replacement of SN74LV125ATDBE4?
All SN74LV125ATDBE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV125ATDBE4, 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 SN74LV125ATDBE4 part is unused and in its original packaging.
Return procedure for SN74LV125ATDBE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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