My Inquiry
My Account
Texas Instruments SN74LV125ATNSE4
- Part No.:
- SN74LV125ATNSE4
- Manufacturer:
- Texas Instruments
- Package:
- 14-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
SN74LV125ATNSE4.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V 14SOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,660
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74LV125AT from Texas Instruments is a quadruple 3-state bus buffer gate IC used for bidirectional data isolation and bus driving in 5-V digital systems. It features four independent channels, TTL-compatible inputs, 4.5–5.5-V operation, 3.8-ns typical propagation delay at 5 V, and Ioff support for partial-power-down mode. It is commonly deployed in microcontroller peripheral expansion, memory address/data bus buffering, and mixed-voltage interface translation.
For engineers reviewing the SN74LV125AT datasheet, SN74LV125AT pinout, SN74LV125AT application, or SN74LV125AT equivalent, key selection criteria include 3-state output timing (tpd/ten/tdis), Ioff leakage (<5 µA), ground bounce (VOLP < 0.8 V), VOH undershoot (VOHV > 2.3 V), and SOIC/VQFN package compatibility with industrial temperature range (–40°C to 125°C).
Technical Context
The SN74LV125AT 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 supports mixed-mode voltage operation - inputs tolerate TTL levels while outputs drive full CMOS logic levels at VCC = 4.5–5.5 V.
Its Ioff circuitry actively disables all outputs during power-down, limiting input/output leakage to ≤5 µA when VCC = 0 V, enabling safe back-drive prevention in hot-swap or partial-power-down systems. The device meets JESD17 latch-up immunity (>250 mA) and JEDEC HBM/CDM ESD ratings (±2000 V / ±1000 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - ensures stable operation across standard 5-V supply tolerances and brown-out conditions. |
| tpd (A→Y) | 3.8 ns typical at 5 V, CL = 15 pF - enables high-speed bus buffering up to ~100 MHz system clock domains. |
| Ioff Leakage | ≤5 µA at VCC = 0 V - prevents damaging current flow during partial power-down or hot insertion. |
| VOLP / VOHV | <0.8 V ground bounce and >2.3 V VOH undershoot at 5 V - reduces switching noise-induced signal integrity issues. |
| Operating Temp | –40°C to +125°C - supports automotive under-hood, industrial control, and extended-temperature embedded applications. |
| ESD Rating | HBM ±2000 V, CDM ±1000 V - meets industrial handling and board-level ESD robustness requirements. |
| Input Compatibility | TTL-voltage compatible (VIH = 2 V, VIL = 0.8 V) - allows direct interfacing with legacy 5-V TTL logic without level shifters. |
Pinout & Package
SN74LV125AT is available in multiple surface-mount packages including SOIC (D), SSOP (DB), TSSOP (PW), and VQFN (RGY). The RGY (14-pin VQFN, 3.5 mm × 3.5 mm) variant features an exposed thermal pad for enhanced power dissipation and improved thermal resistance (RθJA = 47°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 (1OE, 2OE, 3OE, 4OE) | Active-low output enable input | Drives corresponding Y output to high-impedance state when high; must be pulled high via resistor during power-up for safe default state. |
| 2, 5, 9, 12 (1A, 2A, 3A, 4A) | Buffer input | Accepts TTL-compatible logic signals; drives non-inverted output when OE is low. |
| 3, 6, 8, 11 (1Y, 2Y, 3Y, 4Y) | 3-state buffered output | Provides rail-to-rail CMOS output swing; enters high-Z state when OE is high - enables shared-bus contention avoidance. |
| 7 (GND) | Ground reference | Primary return path for all I/O and supply currents; requires low-inductance connection to minimize ground bounce. |
| 14 (VCC) | Power supply | 5-V nominal supply; decoupling capacitor (0.1 µF ceramic) required within 5 mm of pin for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-input compatibility | Supports direct connection to legacy 5-V TTL outputs without level-shifting circuitry. |
| Ioff partial-power-down protection | Prevents back-current flow when VCC = 0 V, enabling safe use in hot-swap and multi-rail systems. |
| Low ground bounce (VOLP < 0.8 V) | Minimizes simultaneous switching noise on shared ground planes, improving signal integrity in dense PCB layouts. |
| High noise immunity (VIH = 2 V, VIL = 0.8 V) | Ensures reliable logic detection despite supply ripple or crosstalk in noisy industrial environments. |
| Mixed-mode voltage operation | Allows interfacing between 3.3-V and 5-V logic domains on same bus when used with appropriate pull-ups. |
Applications
| Microcontroller Peripheral Expansion | Memory Address/Data Bus Buffering |
|---|---|
|
Use Scenario: Expanding GPIO count of an MCU by connecting parallel peripherals (e.g., LCD, keypad, ADC) via shared data lines. IC Role / Device Role / Timing Role: Bidirectional bus isolator that enables time-multiplexed access to multiple peripherals without contention. Use Value: Eliminates need for discrete logic or complex software arbitration; 3.8-ns tpd supports real-time response in 50-MHz+ MCU systems. |
Use Scenario: Driving address and data lines between a microprocessor and external SRAM or Flash memory. IC Role / Device Role / Timing Role: Unidirectional bus driver with controlled 3-state enable timing to prevent bus conflicts during read/write cycles. Use Value: Ensures clean signal edges and fast settling (≤5.5 ns max tpd) for reliable memory access at 20+ MHz bus speeds. |
| Industrial PLC I/O Module Interface | Mixed-Voltage System Translation |
|
Use Scenario: Isolating field-side digital I/O signals from controller-side logic in programmable logic controllers. IC Role / Device Role / Timing Role: Level-shifting buffer with Ioff protection, allowing safe hot-plug of I/O modules while main CPU remains powered. Use Value: Prevents backfeed damage during module replacement; –40°C to +125°C rating ensures reliability in uncontrolled cabinet environments. |
Use Scenario: Interfacing 3.3-V FPGA I/O banks with 5-V sensor or actuator subsystems. IC Role / Device Role / Timing Role: Voltage-tolerant buffer that accepts 3.3-V logic inputs and drives 5-V CMOS loads without external level shifters. Use Value: Reduces BOM count and layout area; TTL-compatible inputs eliminate need for pull-up resistors on FPGA side. |
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); 3.3-V only; faster tpd (2.5 ns typ); no TTL input compatibility. | Designed for modern low-voltage systems; unsuitable for 5-V legacy interfaces. | Select when operating exclusively at 3.3 V and requiring lower power or higher speed - not a drop-in replacement for 5-V designs. |
| 74ACT125 | Higher drive strength (±24 mA); identical 4.5–5.5 V range and TTL compatibility; slightly higher ICC (8 µA vs. 2 µA). | Better suited for heavy capacitive loads (>50 pF); higher static current may impact ultra-low-power standby modes. | Choose when driving long traces or multiple loads where SN74LV125AT's 16-mA drive limit is insufficient. |
Compared with SN74LV125AT, SN74LVC125A targets 3.3-V-only systems with tighter timing but lacks 5-V interoperability, while 74ACT125 offers stronger drive and same voltage range but consumes more quiescent current - making SN74LV125AT optimal for cost-sensitive, mixed-voltage 5-V industrial interfaces requiring low Ioff and noise resilience.
Availability
SN74LV125AT is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and embedded computing applications requiring stable component supply across extended temperature ranges and long production lifecycles.
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 high-reliability logic and interface solutions.
The SN74LV125AT belongs to TI's LV (Low-Voltage) logic family, engineered for robust 5-V operation with enhanced noise immunity, Ioff protection, and industrial temperature support - targeting industrial control, instrumentation, and legacy-system upgrades.
FAQ
What is the maximum operating temperature for SN74LV125AT?
The SN74LV125AT is rated for continuous operation from –40°C to +125°C ambient temperature. This specification is validated per JEDEC JESD78 and confirmed in the device's Recommended Operating Conditions table (Section 5.3), making it suitable for under-hood automotive, factory-floor PLC, and outdoor industrial equipment deployments where thermal margins are critical. The SN74LV125AT maintains full electrical performance across this range.
Does SN74LV125AT support partial-power-down operation?
Yes, SN74LV125AT supports partial-power-down operation via its Ioff feature. When VCC = 0 V, the Ioff circuitry limits input/output leakage current to ≤5 µA (per Section 5.5), preventing damaging back-current flow from live buses into the unpowered device. This capability is explicitly verified in TI's characterization data and enables safe use in hot-swap modules and multi-rail systems where power sequencing is uncontrolled.
What is the typical propagation delay of SN74LV125AT at 5 V?
The typical propagation delay (tpd) of SN74LV125AT is 3.8 ns at VCC = 5 V with CL = 15 pF load (Section 5.6). This value is measured from input transition (A or OE) to output transition (Y) under standard test conditions defined in Figure 6-1. Maximum tpd is 5.5 ns over the full temperature range (–40°C to +125°C), ensuring timing predictability in high-speed digital interfaces.
Can SN74LV125AT interface directly with TTL logic?
Yes, SN74LV125AT inputs are TTL-voltage compatible: VIH = 2.0 V min and VIL = 0.8 V max at VCC = 4.5–5.5 V (Section 5.3). This allows direct connection to standard 5-V TTL outputs (e.g., 74LS series) without level-shifting components. The SN74LV125AT outputs drive full CMOS levels (VOH ≥ 4.4 V, VOL ≤ 0.1 V), ensuring clean interfacing with downstream CMOS loads.
Which package options are currently active for SN74LV125AT?
Active package options for SN74LV125AT include SSOP (DB), SOIC (D), TSSOP (PW), and VQFN (RGY), all in 14-pin configurations. Per TI's Package Option Addendum, part numbers SN74LV125ATDBR, SN74LV125ATDR, SN74LV125ATPWR, and SN74LV125ATRGYR are in active production with tape-and-reel packaging and RoHS compliance. Obsolete variants (e.g., SN74LV125ATD) are discontinued and not recommended for new designs.
SN74LV125ATNSE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LV
- Package/Case:
- 14-SOIC (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-SO
SN74LV125ATNSE4 FAQ
1.How can I place an order for SN74LV125ATNSE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LV125ATNSE4 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 SN74LV125ATNSE4 reliable?
The price and inventory of SN74LV125ATNSE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV125ATNSE4 is usually 5 days.
3.What payment methods are accepted for SN74LV125ATNSE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LV125ATNSE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LV125ATNSE4?
SN74LV125ATNSE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LV125ATNSE4 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 SN74LV125ATNSE4?
For technical support, including SN74LV125ATNSE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV125ATNSE4 requirements.
6.How does Aetrix verify that SN74LV125ATNSE4 is sourced from the original manufacturer or authorized distributors?
All SN74LV125ATNSE4 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 SN74LV125ATNSE4 meets industry standards.
7.What is the process for return or replacement of SN74LV125ATNSE4?
All SN74LV125ATNSE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV125ATNSE4, 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 SN74LV125ATNSE4 part is unused and in its original packaging.
Return procedure for SN74LV125ATNSE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74LV125ATNSE4 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…
