My Inquiry
My Account
Texas Instruments SN74LV125ATPW
- Part No.:
- SN74LV125ATPW
- Manufacturer:
- Texas Instruments
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LV125ATPW.pdf
- Description:
- IC BUF NON-INVERT 5.5V 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,449
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74LV125ATPW from Texas Instruments is a quadruple 3-state bus buffer gate IC used for signal 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 microcontroller peripheral interfacing and multi-drop data bus control.
For engineers reviewing the SN74LV125ATPW datasheet, SN74LV125ATPW pinout, SN74LV125ATPW application, or SN74LV125ATPW equivalent, key selection criteria include 3-state output timing (tpd/ten/tdis), mixed-mode voltage tolerance across ports, ground bounce (VOLP) and undershoot (VOHV) performance, and thermal resistance (RθJA = 113°C/W) in the TSSOP-14 package.
Technical Context
The SN74LV125ATPW implements four independent non-inverting buffers, each with an active-low 3-state output-enable (OE) input. Each channel drives high or low when OE is low, and enters high-impedance state when OE is high - enabling bidirectional bus arbitration without external direction control.
It uses LV-CMOS logic with TTL-compatible input thresholds (VIH = 2 V, VIL = 0.8 V at VCC = 4.5–5.5 V), supports mixed-voltage operation between ports, and includes Ioff circuitry that disables all outputs and limits power-off leakage to ≤5 µA when VCC = 0 V - critical for hot-swap and partial-power-down systems.
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 ripple up to ±0.5 V. |
| tpd (A→Y) | 3.8 ns typical at 5 V, CL = 15 pF - enables reliable operation in 100+ MHz digital buses with tight timing margins. |
| Ioff Leakage | ≤5 µA at VCC = 0 V - prevents backdrive current during power sequencing or system sleep states. |
| VOL / VOH | 0.55 V max at IOL = 16 mA / 3.8 V min at IOH = –16 mA - guarantees robust noise margin against 5-V TTL and CMOS loads. |
| RθJA | 113°C/W (TSSOP-14) - defines thermal derating limit: max 320 mW dissipation before junction exceeds 125°C at 25°C ambient. |
| ESD Rating | ±2000 V HBM - meets industrial handling requirements without additional board-level ESD protection. |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive, industrial PLC, and extended-temperature embedded applications. |
Pinout & Package
TSSOP-14 (PW) package: 5.00 mm × 6.4 mm body, 0.65 mm lead pitch, 1.2 mm max height, gull-wing leads, RoHS-compliant NiPdAu finish, MSL Level-1.
| 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 during power-up; no internal pullup. |
| 2, 5, 9, 12 | A1–A4 | Buffer input terminals - TTL-compatible thresholds allow direct connection to legacy 5-V logic sources. |
| 3, 6, 8, 11 | Y1–Y4 | Non-inverting 3-state outputs - drive buses or downstream logic; high-impedance state isolates sections during contention. |
| 7 | GND | Ground reference - must be connected to system ground plane with low-inductance path to minimize VOLP. |
| 14 | VCC | Power supply - requires local 100-nF ceramic decoupling within 5 mm of pin to suppress switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | VIH = 2 V, VIL = 0.8 V at VCC = 4.5–5.5 V - eliminates need for level shifters when interfacing with legacy 5-V microcontrollers. |
| 3-state output control | Independent OE per channel - enables dynamic bus sharing across multiple masters without external arbitration logic. |
| Ioff partial-power-down | Input/output leakage ≤5 µA at VCC = 0 V - prevents back-current damage during hot-plug or staggered 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 logic transitions. |
| Mixed-mode voltage support | Ports tolerate VI up to 5.5 V regardless of VCC - allows safe interfacing between 3.3-V and 5-V domains on same device. |
Applications
| Microcontroller Bus Expansion | FPGA I/O Interface Isolation |
|---|---|
Use Scenario: Expanding GPIO count of an ARM Cortex-M4 MCU by connecting parallel peripherals (ADCs, DACs, sensors) to a shared 8-bit data bus. IC Role / Device Role / Timing Role: SN74LV125ATPW acts as a directionless bus driver, enabling read/write access to multiple peripherals while preventing bus contention via OE-controlled 3-state outputs. Use Value: Eliminates need for discrete transceivers or complex direction-control logic; 3.8 ns tpd ensures timing closure at 25 MHz bus clock rates. |
Use Scenario: Interfacing a Xilinx Artix-7 FPGA's 3.3-V bank to legacy 5-V industrial sensors and actuators using shared address/data lines. IC Role / Device Role / Timing Role: SN74LV125ATPW serves as a mixed-voltage level translator and bus isolator - its TTL-compatible inputs accept 5-V signals, while outputs drive 3.3-V FPGA inputs safely. Use Value: Enables direct connection without external level shifters; Ioff protects FPGA I/O during sensor power cycling. |
| Industrial PLC Backplane Buffering | Test Equipment Signal Routing |
Use Scenario: Driving long traces on a modular PLC backplane carrying status and control signals between CPU and I/O modules. IC Role / Device Role / Timing Role: SN74LV125ATPW functions as a line driver with controlled edge rates (∆t/∆v = 20 ns/V), reducing EMI and signal integrity degradation over 15-cm traces. Use Value: VOLP < 0.8 V and VOHV > 2.3 V prevent false triggering in noisy factory environments; –40°C to +125°C rating ensures reliability in uncooled enclosures. |
Use Scenario: Building a programmable signal routing matrix in automated test equipment (ATE) to switch DUT signals between measurement instruments and stimulus sources. IC Role / Device Role / Timing Role: SN74LV125ATPW provides four independent, software-controllable 3-state paths - OE pins driven by FPGA GPIO to configure signal flow dynamically. Use Value: Enables reconfigurable test fixtures without mechanical relays; 16 mA drive strength supports fanout to multiple instrument inputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC125APWR | Lower VCC range (1.65–3.6 V), 3.5 ns tpd at 3.3 V, higher Ioff (≤10 µA), RθJA = 119°C/W | Designed for 3.3-V-only systems; not 5-V tolerant - cannot replace SN74LV125ATPW in 5-V buses. | Select only if migrating fully to 3.3-V logic; verify all upstream/downstream devices are 3.3-V compatible. |
| 74ACT125PW | Higher drive (24 mA), faster tpd (2.5 ns), 4.5–5.5 V VCC, but no Ioff, higher ICC (40 µA), RθJA = 105°C/W | Lacks partial-power-down protection - unsuitable for hot-swap or mixed-power-domain systems. | Prefer where maximum speed and drive strength outweigh power-down safety; requires external power sequencing controls. |
Compared with SN74LV125ATPW, SN74LVC125APWR offers better speed in low-voltage systems but sacrifices 5-V compatibility, while 74ACT125PW delivers superior timing and drive at the cost of Ioff functionality - making SN74LV125ATPW the optimal choice for robust, mixed-voltage, hot-pluggable bus interfaces.
Availability
SN74LV125ATPW is available at Aetrix Electronics and suitable for industrial automation, test equipment, and automotive body electronics requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for SN74LV125ATPW 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 high-reliability logic and interface solutions.
The SN74LV125ATPW belongs to TI's LV family of 5-V tolerant CMOS logic devices, engineered for interoperability across mixed-voltage systems and designed specifically for industrial, automotive, and communications infrastructure applications demanding robustness and timing precision.
FAQ
What is the maximum operating temperature for the SN74LV125ATPW?
The SN74LV125ATPW is rated for continuous operation from –40°C to +125°C ambient temperature. This extended range is validated per JEDEC JESD22-A108 and supports deployment in under-hood automotive ECUs, industrial motor drives, and outdoor telecom equipment where passive cooling is used. The TSSOP-14 package's RθJA of 113°C/W determines actual junction temperature under load.
Does the SN74LV125ATPW support hot-swap or partial-power-down operation?
Yes, the SN74LV125ATPW includes Ioff circuitry that limits input/output leakage to ≤5 µA when VCC = 0 V, preventing damaging back-current flow during hot-insertion or staggered power sequencing. This feature is explicitly characterized in Section 5.5 of the datasheet and makes SN74LV125ATPW suitable for modular systems with live backplanes or battery-backed subsystems.
Can the SN74LV125ATPW interface directly between 3.3-V and 5-V logic domains?
Yes - the SN74LV125ATPW supports mixed-mode voltage operation: its inputs tolerate up to 5.5 V regardless of VCC (set to 4.5–5.5 V), and its outputs swing rail-to-rail (0 V to VCC). This allows safe connection of 5-V sensors to 5-V-powered SN74LV125ATPW outputs driving 3.3-V FPGA inputs, provided the FPGA I/Os are 5-V tolerant or protected by series resistors.
What is the recommended power supply decoupling for the SN74LV125ATPW?
TI recommends placing a 100-nF X7R ceramic capacitor between VCC (Pin 14) and GND (Pin 7), located within 5 mm of the SN74LV125ATPW package. For systems with heavy switching loads, add a 4.7-µF tantalum or aluminum electrolytic capacitor nearby. This minimizes supply rail collapse during output transitions and suppresses VOLP-induced noise that could affect adjacent channels.
Is the SN74LV125ATPW pin-compatible with other members of the SN74LV125A family?
Yes - all SN74LV125A variants (e.g., SN74LV125ATD, SN74LV125ATDBR, SN74LV125ATRGYR) share identical pinout, function table, and electrical behavior. The SN74LV125ATPW differs only in package (TSSOP-14) and thermal characteristics (RθJA = 113°C/W); no PCB redesign is needed when substituting among PW, DB, D, NS, or RGY packages - only layout and thermal validation are required.
SN74LV125ATPW 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
SN74LV125ATPW FAQ
1.How can I place an order for SN74LV125ATPW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LV125ATPW 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 SN74LV125ATPW reliable?
The price and inventory of SN74LV125ATPW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV125ATPW is usually 5 days.
3.What payment methods are accepted for SN74LV125ATPW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LV125ATPW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LV125ATPW?
SN74LV125ATPW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LV125ATPW 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 SN74LV125ATPW?
For technical support, including SN74LV125ATPW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV125ATPW requirements.
6.How does Aetrix verify that SN74LV125ATPW is sourced from the original manufacturer or authorized distributors?
All SN74LV125ATPW 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 SN74LV125ATPW meets industry standards.
7.What is the process for return or replacement of SN74LV125ATPW?
All SN74LV125ATPW units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV125ATPW, 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 SN74LV125ATPW part is unused and in its original packaging.
Return procedure for SN74LV125ATPW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74LV125ATPW Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
