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Texas Instruments SN74LV125ATPWT
- Part No.:
- SN74LV125ATPWT
- Manufacturer:
- Texas Instruments
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LV125ATPWT.pdf
- Description:
- IC BUF NON-INVERT 5.5V 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:740
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Product details
Overview
SN74LV125ATPWT 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 SN74LV125ATPWT datasheet, SN74LV125ATPWT pinout, SN74LV125ATPWT application, or SN74LV125ATPWT equivalent, key selection criteria include 3-state output timing (tpd ≤ 8.5 ns over temperature), Ioff leakage (< 5 µA), 14-pin TSSOP package compatibility, and support for mixed-mode voltage operation across all ports.
Technical Context
The SN74LV125ATPWT implements four independent non-inverting buffers, each with active-low 3-state output enable (OE). Each channel operates with rail-to-rail CMOS output swing and TTL-compatible input thresholds (VIH = 2 V, VIL = 0.8 V at VCC = 4.5–5.5 V).
Its Ioff circuitry ensures sub-5 µA power-off leakage when VCC = 0 V, enabling safe hot-insertion and partial-power-down operation. Ground bounce (VOLP < 0.8 V) and VOH undershoot (VOHV > 2.3 V) are characterized at 5 V/25°C, confirming robust noise immunity in high-speed digital buses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - Ensures compatibility with standard 5-V logic rails and tolerates supply variation without functional loss. |
| tpd (typ) | 3.8 ns at VCC = 5 V - Enables reliable operation in 100+ MHz digital bus applications with tight timing margins. |
| Ioff Leakage | < 5 µA at VCC = 0 V - Prevents back-current flow during partial power-down, critical for hot-swap and modular system designs. |
| VOH / VOL | 3.8 V min / 0.55 V max at IO = ±16 mA - Guarantees clean logic levels under full load, supporting fan-out of ≥10 LVTTL loads. |
| ESD Rating | ±2000 V HBM - Meets industrial-grade ESD robustness requirements per ANSI/ESDA/JEDEC JS-001. |
| Operating Temp | –40°C to +125°C - Validated for extended temperature use in automotive engine control and industrial motor drives. |
| Input Compatibility | TTL-voltage compatible - Accepts standard 0.8 V/2.0 V input thresholds, eliminating level-shifter need in legacy 5-V systems. |
Pinout & Package
TSSOP-14 (PW) package: 5.00 mm × 6.4 mm body, 0.65 mm pitch, 1.2 mm max height, exposed pad not present. RoHS-compliant, NIPDAU lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | OE1–OE4 (I) | Active-low 3-state enable inputs - Drive high to disable corresponding Y output; pulled high via external resistor for power-up safety. |
| 2, 5, 9, 12 | A1–A4 (I) | Buffer input terminals - Accept TTL/CMOS logic; VI range –0.5 V to 5.5 V supports mixed-voltage interfacing. |
| 3, 6, 8, 11 | Y1–Y4 (O) | Non-inverting 3-state outputs - High-impedance state (Z) when OE = H; drive strength ±16 mA at VCC = 4.5–5.5 V. |
| 7 | GND | Ground reference - Shared return path for all channels; requires low-inductance PCB connection to minimize ground bounce. |
| 14 | VCC | Power supply - Decoupling capacitor (0.1 µF ceramic) required within 5 mm of pin for stable switching performance. |
Key Features
| Feature | Design Value |
|---|---|
| Independent 3-state control per channel | Enables selective bus arbitration without gating entire data paths - essential for multi-master communication backplanes. |
| Mixed-mode voltage operation | Allows A-inputs and Y-outputs to interface across different supply domains (e.g., 3.3-V controller to 5-V peripheral) without level shifters. |
| Ioff partial-power-down support | Prevents current backflow when VCC = 0 V, satisfying IEC 61000-4-2 and enabling safe insertion into live backplanes. |
| Low ground bounce (VOLP < 0.8 V) | Reduces signal integrity risk in dense PCB layouts with shared ground planes - validated at CL = 15 pF, 5 V, 25°C. |
| Latch-up immunity > 250 mA | Exceeds JEDEC JESD17 Class II requirements - eliminates risk of destructive latch-up during transient overvoltage events. |
Applications
| Industrial PLC Backplane Interface | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Isolating microcontroller GPIOs from noisy 24-V I/O expansion cards in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional 3-state buffer providing controlled data routing between isolated voltage domains on a shared bus. Use Value: Enables hot-swappable I/O modules with no bus contention, leveraging Ioff to prevent backfeed during card insertion/removal. |
Use Scenario: Interfacing 3.3-V MCU outputs to 5-V CAN transceiver control lines and sensor multiplexers in BCM head units. IC Role / Device Role / Timing Role: Voltage-tolerant bus driver ensuring clean logic transitions despite supply rail mismatches and EMI exposure. Use Value: Eliminates discrete level-shifters while maintaining 3.8 ns propagation delay - critical for real-time diagnostic response timing. |
| Test Equipment Digital Pattern Generator | Medical Imaging Data Acquisition Board |
|
Use Scenario: Driving parallel address/data lines from FPGA-based pattern generators to DUTs with varying input thresholds. IC Role / Device Role / Timing Role: Quad-channel output buffer with per-line enable, allowing dynamic reconfiguration of test vector directionality. Use Value: Supports simultaneous sourcing/sinking up to ±16 mA per output - maintains signal fidelity at 100-MHz toggle rates. |
Use Scenario: Buffering ADC output streams from multiple analog front-ends to a central FPGA in portable ultrasound systems. IC Role / Device Role / Timing Role: Low-noise, high-Z isolation device preventing crosstalk between high-resolution analog and digital subsystems. Use Value: VOLP < 0.8 V and VOHV > 2.3 V ensure minimal dynamic noise coupling into adjacent 16-bit ADC sampling paths. |
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 at 3.3 V); higher Ioff (10 µA max) | Better suited for dual-supply 3.3/5-V systems and higher-speed interfaces; less robust in pure 5-V industrial environments | Choose SN74LVC125APWR if operating below 4.5 V or requiring faster timing; retain SN74LV125ATPWT for strict 5-V legacy compatibility and lower Ioff. |
| 74LVX125MTR | Lower VCC range (2.0–3.6 V only); identical pinout; higher VOL (0.7 V max at 16 mA) | Designed exclusively for 3-V systems; incompatible with 5-V buses without level translation | Select 74LVX125MTR only for battery-powered 3.3-V designs; SN74LV125ATPWT remains mandatory for 5-V industrial backplanes. |
Compared with SN74LVC125APWR and 74LVX125MTR, the SN74LV125ATPWT uniquely balances 5-V tolerance, ultra-low Ioff, and industrial temperature rating - making it irreplaceable in legacy 5-V control systems where power sequencing and ESD robustness are non-negotiable.
Availability
SN74LV125ATPWT is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and medical data acquisition systems requiring stable component supply and long-term lifecycle assurance.
Supply support for SN74LV125ATPWT 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 logic solutions with over 50 years of industrial reliability heritage.
The SN74LV125ATPWT belongs to TI's LV logic family, engineered specifically for robust 5-V digital interfacing in harsh environments - emphasizing low ground bounce, Ioff safety, and extended temperature operation.
FAQ
What is the maximum operating temperature for the SN74LV125ATPWT?
The SN74LV125ATPWT is fully specified from –40°C to +125°C ambient temperature. This extended range is validated per JEDEC JESD22-A108 and supports deployment in under-hood automotive modules and industrial motor drives where thermal stress is severe. All electrical parameters, including tpd and Ioff, remain guaranteed across this full range.
Does the SN74LV125ATPWT require external pull-up resistors on its OE pins?
Yes - to ensure outputs remain in high-impedance state during power-up or brownout, each OE pin of the SN74LV125ATPWT must be tied to VCC via an external pull-up resistor. TI recommends 10 kΩ as a default value; minimum resistance is determined by the current-sinking capability of the driving source, per Section 7.1 of the datasheet.
Is the SN74LV125ATPWT pin-compatible with other 14-pin TSSOP bus buffers?
The SN74LV125ATPWT shares the same 14-pin TSSOP (PW) footprint and pinout as SN74LV125APWR and SN74LVC125APWR, but differs electrically in VCC range and Ioff behavior. Mechanical compatibility is confirmed per PW0014A package drawing; however, direct substitution requires verification of supply voltage and power-down requirements.
What is the purpose of the Ioff specification in the SN74LV125ATPWT?
The Ioff specification (≤ 5 µA at VCC = 0 V) in the SN74LV125ATPWT enables safe partial-power-down operation. When VCC is removed, Ioff prevents damaging current from flowing backward through inputs or outputs - a critical feature for hot-pluggable modules, modular instrumentation, and systems with staggered power sequencing.
Can the SN74LV125ATPWT interface between 3.3-V and 5-V logic domains?
Yes - the SN74LV125ATPWT supports mixed-mode voltage operation: its inputs accept 0–5.5 V regardless of VCC, and outputs drive rail-to-rail (0 to VCC). With VCC = 5 V, it safely accepts 3.3-V inputs and drives 5-V loads, eliminating external level shifters in many 3.3/5-V bridging applications.
SN74LV125ATPWT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LV
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
SN74LV125ATPWT FAQ
1.How can I place an order for SN74LV125ATPWT through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LV125ATPWT 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 SN74LV125ATPWT reliable?
The price and inventory of SN74LV125ATPWT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV125ATPWT is usually 5 days.
3.What payment methods are accepted for SN74LV125ATPWT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LV125ATPWT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LV125ATPWT?
SN74LV125ATPWT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LV125ATPWT 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 SN74LV125ATPWT?
For technical support, including SN74LV125ATPWT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV125ATPWT requirements.
6.How does Aetrix verify that SN74LV125ATPWT is sourced from the original manufacturer or authorized distributors?
All SN74LV125ATPWT 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 SN74LV125ATPWT meets industry standards.
7.What is the process for return or replacement of SN74LV125ATPWT?
All SN74LV125ATPWT units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV125ATPWT, 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 SN74LV125ATPWT part is unused and in its original packaging.
Return procedure for SN74LV125ATPWT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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