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Texas Instruments SN74LV125ATPWG4
- Part No.:
- SN74LV125ATPWG4
- Manufacturer:
- Texas Instruments
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LV125ATPWG4.pdf
- Description:
- IC BUF NON-INVERT 5.5V 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,976
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Product details
Overview
SN74LV125ATPWG4 from Texas Instruments is a quadruple 3-state bus buffer gate IC 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 TTL-voltage-compatible inputs, and features Ioff partial-power-down protection. It is commonly deployed in industrial control backplanes and mixed-voltage interface bridging.
For engineers reviewing the SN74LV125ATPWG4 datasheet, SN74LV125ATPWG4 pinout, SN74LV125ATPWG4 application, or SN74LV125ATPWG4 equivalent, key selection criteria include 3-state output timing (tpd ≤ 5.5 ns), Ioff leakage (< 5 µA), thermal resistance (RθJA = 113 °C/W for TSSOP), and compatibility with 5-V TTL logic levels across –40°C to +125°C.
Technical Context
The SN74LV125ATPWG4 implements four independent non-inverting buffers, each with an active-low 3-state output enable (OE) input. Its logic function follows a simple truth table: when OE is low, Y = A; when OE is high, Y = high-impedance. All inputs tolerate TTL voltage thresholds (VIL ≤ 0.8 V, VIH ≥ 2 V) while operating from a single 4.5–5.5 V supply.
It integrates Ioff circuitry that disables all I/Os during power-down, limiting off-state leakage to ≤5 µA even with input/output voltages up to 5.5 V. Ground bounce (VOLP < 0.8 V) and VOH undershoot (VOHV > 2.3 V) are characterized at 5 V/25°C, ensuring signal integrity in fast-switching bus environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - Ensures robust operation across industrial-grade 5-V rails with ±5% tolerance. |
| tpd (CL = 15 pF) | 3.8 ns typical at 5 V - Enables reliable 100+ MHz bus operation with tight timing margins. |
| Ioff Leakage | ≤5 µA at 0–5.5 V - Prevents backdrive current and enables safe hot-insertion in powered-backplane systems. |
| VOH / VOL (IOL = 16 mA) | ≥3.8 V / ≤0.55 V at 4.5 V - Guarantees noise margin >0.7 V against TTL loads under full drive conditions. |
| Operating Temperature | –40°C to +125°C - Qualified for under-hood automotive, factory automation, and extended-temperature industrial use. |
| RθJA (TSSOP-14) | 113 °C/W - Requires minimal heatsinking in ambient temperatures up to 85°C at full static load. |
| ESD Rating (HBM) | ±2000 V - Meets JEDEC JS-001 for handling without special ESD controls in standard assembly lines. |
Pinout & Package
TSSOP-14 (PW) package: 5.00 mm × 6.4 mm body, 0.65 mm lead pitch, 1.2 mm max height, exposed pad optional per design. Pin 1 index located at top-left corner with beveled edge marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | OE1–OE4 (I) | Active-low 3-state enable inputs - Tie high via pullup to ensure Hi-Z during power-up. |
| 2, 5, 9, 12 | A1–A4 (I) | Buffer input terminals - Accept TTL-compatible logic levels regardless of VCC. |
| 3, 6, 8, 11 | Y1–Y4 (O) | Non-inverting 3-state outputs - Drive buses directly; high-impedance state prevents contention. |
| 7 | GND | Ground reference - Must be low-inductance connection to minimize ground bounce (VOLP). |
| 14 | VCC | Power supply - Decoupling capacitor (0.1 µF ceramic) required within 5 mm of this pin. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-Voltage Compatibility | VIH ≤ 2 V and VIL ≥ 0.8 V thresholds allow direct interfacing with legacy 5-V TTL logic without level shifters. |
| Mixed-Mode Voltage Operation | Inputs and outputs tolerate 0–5.5 V regardless of VCC - supports interfacing between 3.3-V and 5-V domains. |
| Ioff Partial-Power-Down | Blocks current flow between powered and unpowered sections - critical for hot-swap and modular system designs. |
| Low Ground Bounce | VOLP < 0.8 V at 5 V ensures stable logic LOWs during simultaneous output switching, reducing false triggering. |
| Latch-Up Immunity | Exceeds 250 mA per JESD17 - eliminates risk of destructive latch-up in noisy industrial environments. |
Applications
| Industrial Backplane Interface | Automotive Body Control Module |
|---|---|
|
Use Scenario: Isolating microcontroller GPIOs from shared CAN/LIN transceiver control lines in multi-node vehicle networks. IC Role / Device Role / Timing Role: Bidirectional 3-state buffer enabling dynamic bus arbitration and preventing signal contention during sleep/wake transitions. Use Value: Ioff leakage < 5 µA prevents battery drain during vehicle sleep mode; tpd ≤ 5.5 ns supports real-time response to wake events. |
Use Scenario: Driving segmented LED displays and relay drivers from a 3.3-V MCU in dashboard electronics. IC Role / Device Role / Timing Role: Level-shifting buffer translating 3.3-V logic to 5-V loads while maintaining timing integrity. Use Value: TTL-compatible inputs accept 3.3-V signals directly; VOL ≤ 0.55 V ensures clean LOWs on 5-V LED cathodes. |
| Programmable Logic Interface | Test Equipment Signal Routing |
|
Use Scenario: Interfacing FPGA I/O banks to external 5-V test fixtures in automated boundary-scan systems. IC Role / Device Role / Timing Role: Direction-controlled bus driver enabling configurable data path routing between DUT and tester. Use Value: Four independent channels support parallel test vector loading; RθJA = 113 °C/W allows dense PCB placement. |
Use Scenario: Multiplexing multiple sensor analog front-ends onto a shared ADC input in benchtop instrumentation. IC Role / Device Role / Timing Role: Digital control buffer gating clock and enable signals to precision analog switches. Use Value: Low VOLP < 0.8 V prevents ground noise coupling into sensitive analog paths; –40°C to +125°C rating suits lab-to-field deployment. |
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); higher Ioff (10 µA max); LVC family. | Better suited for mixed-supply systems with 1.8-V/2.5-V logic; less ideal for pure 5-V legacy designs requiring strict TTL compatibility. | Choose SN74LVC125APWR only if 1.65–3.6-V operation or sub-3-ns timing is required; SN74LV125ATPWG4 remains preferred for 5-V TTL interoperability. |
| 74ACT125SCX | Higher drive strength (±24 mA); faster tpd (2.5 ns); no Ioff; ACT family; 4.5–5.5 V only. | Lacks partial-power-down capability; unsuitable for hot-swap or modular systems where backdrive must be blocked. | Select 74ACT125SCX only when maximum speed and drive are critical and Ioff is not required; SN74LV125ATPWG4 provides superior system-level safety. |
Compared with SN74LVC125APWR and 74ACT125SCX, SN74LV125ATPWG4 uniquely balances 5-V TTL compatibility, guaranteed Ioff protection, and industrial temperature support - making it the optimal choice for legacy interface consolidation and power-aware embedded systems.
Availability
SN74LV125ATPWG4 is available at Aetrix Electronics and suitable for industrial backplane interfaces, automotive body control modules, and programmable logic interconnects requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LV125ATPWG4 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 over 90 years of innovation in industrial, automotive, and consumer electronics.
The SN74LV125ATPWG4 belongs to TI's LV logic family, designed specifically for robust 5-V digital interfacing with enhanced noise immunity, power-down safety, and wide-temperature reliability in mission-critical embedded systems.
FAQ
What is the recommended power supply decoupling for SN74LV125ATPWG4?
Place a 0.1 µF ceramic capacitor between VCC (pin 14) and GND (pin 7), located within 5 mm of the device. For systems with heavy simultaneous switching, add a 4.7 µF bulk capacitor nearby. This minimizes supply noise and ensures stable 3.8 ns propagation delay performance across the full –40°C to +125°C range in the SN74LV125ATPWG4.
Does SN74LV125ATPWG4 support hot-swap operation?
Yes - the SN74LV125ATPWG4 includes Ioff circuitry that limits input/output leakage to ≤5 µA when VCC = 0 V, preventing damaging backdrive current during live insertion. This makes the SN74LV125ATPWG4 suitable for modular backplane systems where cards may be inserted or removed while the main chassis remains powered.
Can SN74LV125ATPWG4 interface directly with 3.3-V microcontrollers?
Yes - the SN74LV125ATPWG4 accepts 3.3-V logic levels as valid inputs (VIH ≥ 2 V, VIL ≤ 0.8 V) and operates from 4.5–5.5 V, enabling direct connection to 3.3-V MCUs without level shifters. Its outputs swing rail-to-rail (0 V to VCC), so SN74LV125ATPWG4 drives 5-V loads while accepting 3.3-V control signals.
What is the maximum capacitive load SN74LV125ATPWG4 can drive reliably?
The SN74LV125ATPWG4 is characterized for CL = 15 pF (tpd = 3.8 ns) and CL = 50 pF (tpd = 5.3 ns). It can reliably drive up to 50 pF with timing guaranteed across –40°C to +125°C. For loads >50 pF, derate timing margins and verify setup/hold with oscilloscope measurements - the SN74LV125ATPWG4 does not specify performance beyond 50 pF in official characterization.
How should unused inputs be handled on SN74LV125ATPWG4?
All unused inputs on SN74LV125ATPWG4 - including A and OE pins - must be tied to either VCC or GND. Floating inputs cause increased ICC, noise susceptibility, and potential oscillation. TI recommends pulling unused OE pins to VCC via 10-kΩ resistors to guarantee high-impedance outputs at power-up - a critical practice confirmed in the SN74LV125ATPWG4 functional description.
SN74LV125ATPWG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LV
- Package/Case:
- 14-TSSOP (0.173", 4.40mm 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-TSSOP
SN74LV125ATPWG4 FAQ
1.How can I place an order for SN74LV125ATPWG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LV125ATPWG4 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 SN74LV125ATPWG4 reliable?
The price and inventory of SN74LV125ATPWG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV125ATPWG4 is usually 5 days.
3.What payment methods are accepted for SN74LV125ATPWG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LV125ATPWG4 transactions.
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4.How is shipping managed for SN74LV125ATPWG4?
SN74LV125ATPWG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LV125ATPWG4 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 SN74LV125ATPWG4?
For technical support, including SN74LV125ATPWG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV125ATPWG4 requirements.
6.How does Aetrix verify that SN74LV125ATPWG4 is sourced from the original manufacturer or authorized distributors?
All SN74LV125ATPWG4 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 SN74LV125ATPWG4 meets industry standards.
7.What is the process for return or replacement of SN74LV125ATPWG4?
All SN74LV125ATPWG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV125ATPWG4, 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 SN74LV125ATPWG4 part is unused and in its original packaging.
Return procedure for SN74LV125ATPWG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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