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NXP Semiconductors 74LVT125D/AUJ
- Part No.:
- 74LVT125D/AUJ
- Manufacturer:
- NXP Semiconductors
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74LVT125D/AUJ.pdf
- Description:
- IC BUFFER NON-INVERT 3.6V 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,462
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Product details
Overview
74LVT125D/AUJ from Nexperia is a 3.3 V quad non-inverting buffer with 3-state outputs, designed for bus interface applications in mixed-voltage systems. It features bus hold inputs (eliminating external pull-ups), IOFF partial power-down protection, and ±32 mA/64 mA output drive capability. It operates across -40 °C to +85 °C and supports direct TTL-level interfacing.
For engineers reviewing the 74LVT125D/AUJ datasheet, 74LVT125D/AUJ pinout, 74LVT125D/AUJ application, or 74LVT125D/AUJ equivalent, key selection criteria include 3-state timing (tPZH ≤ 4.7 ns), overvoltage-tolerant inputs (up to 5.5 V), and SO14 package compatibility with legacy 14-pin logic footprints.
Technical Context
This BiCMOS device integrates four independent non-inverting buffers, each controlled by an active-low output enable (nOE). Its IOFF circuitry disables outputs during power-down to prevent backflow current, enabling hot-plug operation in live systems.
The bus hold feature maintains valid logic states on unused inputs without external components, while overvoltage-tolerant inputs allow safe interfacing with 5 V buses even when powered at 3.3 V - critical for voltage translation in mixed-signal backplanes and memory subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7 V to 3.6 V - ensures stable operation across industrial-grade 3.3 V rails with ±0.3 V tolerance. |
| Output Drive | +64 mA sink / -32 mA source - supports driving heavy capacitive loads (e.g., 50 pF buses) with fast edge rates. |
| Propagation Delay | tPLH/tPHL ≤ 4.0 ns @ 3.3 V - enables high-speed data routing in sub-5 ns timing-critical paths. |
| Input Voltage Range | -0.5 V to +5.5 V - allows safe connection to 5 V logic without level shifters or clamping diodes. |
| Operating Temperature | -40 °C to +85 °C - qualified for extended industrial environments including base station control and industrial PLC I/O modules. |
| Bus Hold Current | ±75 μA to ±150 μA - actively maintains input state without external biasing, reducing BOM count and board space. |
| IOFF Leakage | ±100 μA @ VCC = 0 V - prevents damaging back-current during partial power-down sequences in modular systems. |
Pinout & Package
74LVT125D/AUJ uses the SO14 (SOT108-1) plastic small outline package: 14-lead, 3.9 mm body width, 1.27 mm pitch, with gull-wing leads and pin 1 index marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | nOE (active LOW) | Independent 3-state enable per buffer - allows selective bus isolation without affecting other channels. |
| 2, 5, 9, 12 | nA (data input) | Non-inverting input with bus hold - retains last valid logic state when floating, eliminating pull-up resistors. |
| 3, 6, 8, 11 | nY (data output) | 3-state CMOS output capable of ±32 mA/64 mA drive - interfaces directly with TTL and 3.3 V CMOS loads. |
| 7 | GND | Ground reference for all I/O and internal logic - must be connected to system ground plane for noise immunity. |
| 14 | VCC | Primary supply rail - decoupling capacitor (100 nF) required within 10 mm for stable high-speed switching. |
Key Features
| Feature | Design Value |
|---|---|
| Bus hold inputs | Eliminates need for 4–16 external pull-up resistors in typical quad-buffer configurations, reducing layout complexity and cost. |
| IOFF partial power-down | Disables outputs and limits leakage to ±100 μA when VCC = 0 V - enables safe insertion/extraction in powered-backplane systems. |
| Overvoltage-tolerant inputs | Withstands up to 5.5 V regardless of VCC state - permits direct connection to 5 V buses without level translators in mixed-voltage designs. |
| BiCMOS output stage | Combines bipolar speed and CMOS low static power - achieves 4 ns propagation delay with <0.19 mA ICC (outputs disabled). |
| Power-up 3-state | Outputs remain in high-impedance state until VCC stabilizes above 1.2 V - prevents bus contention during power sequencing. |
Applications
| Memory Address Buffering | Industrial Backplane Interface |
|---|---|
Use Scenario: Buffering address lines between a 3.3 V microcontroller and parallel SRAM/Flash devices operating at 3.3 V or 5 V. IC Role / Device Role / Timing Role: Non-inverting 3-state buffer providing isolation, drive strength, and voltage-level compatibility across memory cycles. Use Value: Enables reliable read/write timing with tPLH ≤ 4.0 ns and eliminates need for discrete level shifters or pull-ups on unused address bits. | Use Scenario: Interfacing multiple 3.3 V controller cards to a shared 5 V backplane in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Bus interface buffer with overvoltage-tolerant inputs and IOFF protection for hot-swap-capable card slots. Use Value: Prevents back-current damage during live insertion and maintains signal integrity on long backplane traces via +64 mA sink capability. |
| Test Equipment Signal Routing | Legacy System Voltage Translation |
Use Scenario: Routing digital stimulus signals from a 3.3 V FPGA pattern generator to DUTs with mixed 3.3 V/5 V I/O requirements. IC Role / Device Role / Timing Role: Quad-channel 3-state buffer enabling dynamic channel enable/disable for multi-DUT test sequencing. Use Value: Delivers sub-5 ns timing accuracy and bus hold stability during signal reconfiguration, reducing test setup overhead. | Use Scenario: Upgrading legacy 5 V TTL-based instrumentation systems with modern 3.3 V controllers while retaining existing 5 V peripherals. IC Role / Device Role / Timing Role: Level-compatible interface buffer allowing bidirectional signal flow without redesigning PCB interconnects. Use Value: Supports direct 5 V input acceptance and 3.3 V output drive - avoids full-system rewiring and preserves firmware compatibility. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74LVTH125D | Higher drive (+64 mA sink / -64 mA source vs. -32 mA source); identical pinout, SO14 package, and bus hold functionality. | Better suited for driving heavier loads or longer traces where symmetrical drive is required. | Select 74LVTH125D when balanced HIGH/LOW output strength is needed; otherwise 74LVT125D/AUJ offers lower power consumption in asymmetrical load scenarios. |
| SN74LVC125APW | TI part in TSSOP14; 1.65–3.6 V supply range; no bus hold; lower drive (±24 mA); lacks IOFF and overvoltage tolerance. | Requires external pull-ups and level-shifting for 5 V bus interfacing; not suitable for hot-swap or partial power-down use cases. | Choose SN74LVC125APW only in cost-sensitive, single-rail 3.3 V designs without mixed-voltage or live-insertion requirements. |
Compared with 74LVTH125D and SN74LVC125APW, the 74LVT125D/AUJ uniquely balances robust 5 V-tolerant interfacing, bus hold integration, and industrial temperature support in a standard SO14 footprint - making it optimal for upgrade paths in legacy industrial hardware.
Availability
74LVT125D/AUJ is available at Aetrix Electronics and suitable for industrial automation, test equipment, and embedded memory subsystems requiring stable component supply, long-term lifecycle assurance, and drop-in compatibility with existing SO14 logic layouts.
Supply support for 74LVT125D/AUJ 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
Nexperia is a global semiconductor expert focused on essential efficiency technologies, delivering high-performance logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.
The 74LVT125D/AUJ belongs to Nexperia's LVT (Low-Voltage TTL) logic family, engineered specifically for high-speed, mixed-voltage bus interfacing in industrial and communications infrastructure where reliability, thermal robustness, and legacy compatibility are critical.
FAQ
What is the maximum input voltage rating for 74LVT125D/AUJ?
The 74LVT125D/AUJ supports input voltages from -0.5 V to +5.5 V, independent of VCC. This overvoltage tolerance allows direct connection to 5 V buses without external protection, making it ideal for mixed-voltage system upgrades where legacy 5 V peripherals interface with new 3.3 V controllers. The specification is verified per JEDEC JESD8C and confirmed in Table 5 of the official Nexperia datasheet Rev. 8.
Does 74LVT125D/AUJ support hot-plug operation?
Yes, the 74LVT125D/AUJ supports live insertion and extraction due to its IOFF circuitry and power-up 3-state behavior. When VCC is 0 V, IOFF limits leakage to ±100 μA, preventing damaging backflow current. Outputs remain in high-impedance state until VCC exceeds 1.2 V, avoiding bus contention during power ramp-up - a requirement explicitly stated in Section 1 and Table 5 of the Nexperia datasheet.
How does the bus hold feature work on 74LVT125D/AUJ?
The bus hold circuit on 74LVT125D/AUJ actively maintains the last valid logic state on each input (nA1–nA4) using weak feedback transistors. With IBHL = +75 μA to +150 μA and IBHH = -75 μA to -150 μA, it overrides typical noise-induced floating without external pull-up resistors. This function is integral to the silicon design and documented in Sections 1, 2, and Table 6 of the datasheet.
What is the propagation delay performance of 74LVT125D/AUJ at 3.3 V?
At VCC = 3.3 V and Tamb = 25 °C, the 74LVT125D/AUJ delivers typical tPLH = 2.7 ns and tPHL = 2.9 ns (Table 7). The maximum guaranteed delay is 4.0 ns for both transitions under worst-case conditions (-40 °C to +85 °C, VCC = 3.0–3.6 V), enabling reliable operation in sub-5 ns timing-critical data paths such as memory address latching and high-speed test signal routing.
Is 74LVT125D/AUJ pin-compatible with other packages in the same family?
Yes - the 74LVT125D/AUJ (SO14/SOT108-1) shares identical pin configuration and function with 74LVT125PW (TSSOP14) and 74LVT125BQ (DHVQFN14), as confirmed in Figure 4 and Table 1 of the Nexperia datasheet. All variants use the same pin numbering, signal mapping (e.g., Pin 1 = 1OE, Pin 14 = VCC), and electrical characteristics, enabling direct PCB footprint substitution where package height and thermal requirements permit.
74LVT125D/AUJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74LVT
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 32mA, 64mA
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
74LVT125D/AUJ FAQ
1.How can I place an order for 74LVT125D/AUJ through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVT125D/AUJ 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 74LVT125D/AUJ reliable?
The price and inventory of 74LVT125D/AUJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVT125D/AUJ is usually 5 days.
3.What payment methods are accepted for 74LVT125D/AUJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVT125D/AUJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVT125D/AUJ?
74LVT125D/AUJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVT125D/AUJ 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 74LVT125D/AUJ?
For technical support, including 74LVT125D/AUJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVT125D/AUJ requirements.
6.How does Aetrix verify that 74LVT125D/AUJ is sourced from the original manufacturer or authorized distributors?
All 74LVT125D/AUJ 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 74LVT125D/AUJ meets industry standards.
7.What is the process for return or replacement of 74LVT125D/AUJ?
All 74LVT125D/AUJ units undergo pre-shipment inspection (PSI). If there is an issue with 74LVT125D/AUJ, 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 74LVT125D/AUJ part is unused and in its original packaging.
Return procedure for 74LVT125D/AUJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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