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NXP Semiconductors 74ABT125D/AUJ
- Part No.:
- 74ABT125D/AUJ
- Manufacturer:
- NXP Semiconductors
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74ABT125D/AUJ.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,516
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Product details
Overview
74ABT125D/AUJ from Nexperia is a quad 3-state buffer/line driver IC designed for bus interface applications in industrial and embedded systems. It operates from 4.5 V to 5.5 V, delivers ±32 mA/±64 mA output drive, supports -40 °C to +85 °C ambient operation, and features IOFF partial power-down protection. It is used in bidirectional data bus isolation and TTL-level signal conditioning.
For engineers reviewing the 74ABT125D/AUJ datasheet, 74ABT125D/AUJ pinout, 74ABT125D/AUJ application, or 74ABT125D/AUJ equivalent, key selection criteria include 3-state timing (tPZH ≤ 5.9 ns), IOFF-enabled safe power sequencing, high-current drive capability, and SO14 package compatibility with legacy board layouts.
Technical Context
The 74ABT125D/AUJ implements four independent non-inverting buffers, each with active-low 3-state enable (nOE). Its BiCMOS architecture enables TTL-compatible input thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V) and fast propagation delays (tPLH/tPHL ≤ 4.6 ns at 5 V).
IOFF circuitry actively disables outputs during power-down, blocking backflow current when VCC = 0 V - critical for hot-swap and partial-power-down systems. Input clamping (VIK ≤ -1.2 V) and ESD robustness (HBM > 2000 V, CDM > 1000 V) support rugged industrial deployment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5 V TTL and CMOS logic rails. |
| Output drive | –32 mA HIGH / +64 mA LOW - drives heavy capacitive loads and multiple TTL inputs without external buffering. |
| Propagation delay | tPLH/tPHL ≤ 4.6 ns @ 5 V - enables high-speed bus interfacing up to ~200 MHz clock-equivalent rates. |
| IOFF leakage | ±100 μA @ VCC = 0 V - prevents damaging backfeed current during power sequencing or hot insertion. |
| Operating temperature | –40 °C to +85 °C - qualified for industrial-grade environmental reliability without derating. |
| ESD rating | HBM > 2000 V, CDM > 1000 V - withstands handling and board-level electrostatic events per JEDEC JS-001/JS-002. |
| Input capacitance | 4 pF - minimizes loading on upstream drivers and preserves signal edge integrity. |
Pinout & Package
74ABT125D/AUJ uses the SO14 (SOT108-1) plastic small outline package: 14-pin, 3.9 mm body width, 1.27 mm lead pitch, gull-wing leads. Pin 1 marked by index notch; pin 7 = GND, pin 14 = VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 (1OE–4OE) | Active-low output enable | Each independently controls one buffer's 3-state output; LOW enables, HIGH disables (high-Z). |
| 2, 5, 9, 12 (1A–4A) | Data input | Non-inverting TTL-compatible inputs; accept 0.8 V/2.0 V thresholds across full VCC range. |
| 3, 6, 8, 11 (1Y–4Y) | Data output | Buffered, 3-state outputs capable of sourcing –32 mA or sinking +64 mA. |
| 7 | GND | Reference ground for all I/O and internal circuitry; must be low-impedance connection. |
| 14 | VCC | Primary supply rail; decoupling capacitor (100 nF) required near pin for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| BiCMOS process | Combines bipolar speed and CMOS low static power: ICC ≤ 1.5 mA (enabled), ≤ 250 μA (disabled). |
| Power-up 3-state | Outputs remain high-impedance until VCC stabilizes - prevents bus contention during power-on reset. |
| Live insertion support | IOFF and latch-up immunity (>500 mA) allow safe insertion/removal in powered-backplane systems. |
| TTL interface directness | No level-shifting needed: inputs recognize standard TTL logic levels; outputs drive TTL loads directly. |
| Latch-up protection | Exceeds JESD78B Class II Level A (500 mA) - immune to destructive latch-up under transient overvoltage. |
Applications
| Industrial Bus Isolation | Legacy System Signal Conditioning |
|---|---|
Use Scenario: Isolating microcontroller GPIO banks from shared 5 V data buses in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Quad buffer provides direction-controlled, 3-state isolation between MCU and peripheral bus segments. Use Value: Prevents bus contention during firmware updates and enables dynamic bus segment reconfiguration without hardware changes. | Use Scenario: Interfacing modern FPGA I/O banks to legacy TTL-based instrumentation subsystems. IC Role / Device Role / Timing Role: Level-translation-free signal conditioning and fanout amplification for control signals. Use Value: Eliminates need for discrete resistors or additional level shifters while maintaining sub-5 ns timing margins. |
| Hot-Swappable Backplane Interface | Test Equipment Signal Routing |
Use Scenario: Enabling safe module insertion/extraction in powered 5 V backplanes used in automated test equipment racks. IC Role / Device Role / Timing Role: IOFF-protected buffer isolates card-local logic from backplane bus during insertion transients. Use Value: Blocks backflow current during partial power-down, preventing damage to live backplane and adjacent modules. | Use Scenario: Multiplexing and gating digital stimulus signals in benchtop logic analyzers and pattern generators. IC Role / Device Role / Timing Role: Precision-timed 3-state enable allows glitch-free signal routing and channel blanking. Use Value: Enables nanosecond-accurate signal gating with tPZL ≤ 5.5 ns and no output leakage in OFF state (IOZ ≤ –50 μA). |
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 |
|---|---|---|---|
| 74LVT125PW | Lower VCC range (2.7–3.6 V); 3.3 V only; 24 mA/24 mA drive; faster tPLH (2.3 ns typ) | Designed for 3.3 V systems; not 5 V tolerant; unsuitable for mixed-voltage or legacy 5 V bus use | Select only for new 3.3 V designs requiring lower power and higher speed - not drop-in for 5 V infrastructure. |
| SN74ABT125N | Same electrical specs but obsolete PDIP-14 package (SOT27-1); no IOFF; lacks partial power-down protection | Not suitable for hot-swap or power-sequenced systems; limited thermal performance vs SO14 | Use only for legacy repair or prototyping where through-hole mounting is mandatory; avoid for new designs. |
Compared with 74ABT125D/AUJ, the 74LVT125PW offers superior speed and efficiency in 3.3 V domains but sacrifices 5 V interoperability and IOFF safety, while the SN74ABT125N matches functionality but omits critical power-down protection and modern packaging.
Availability
74ABT125D/AUJ is available at Aetrix Electronics and suitable for industrial automation, test equipment, and legacy system upgrades requiring stable component supply, long-term manufacturability, and SO14 footprint compatibility.
Supply support for 74ABT125D/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 high-volume, high-reliability essential components including logic, discretes, MOSFETs, and ESD protection devices.
The 74ABT series targets industrial and communications infrastructure applications demanding robust 5 V logic with advanced power management, bus isolation, and hot-swap readiness.
FAQ
What is the maximum operating frequency supported by the 74ABT125D/AUJ?
The 74ABT125D/AUJ does not specify a maximum clock frequency, but its propagation delay (tPLH/tPHL ≤ 4.6 ns at 5 V) supports reliable operation in bus systems with signal periods exceeding ~10 ns - effectively enabling use in 100+ MHz data paths when combined with appropriate layout and load management. The 74ABT125D/AUJ is optimized for asynchronous bus buffering rather than synchronous clock distribution.
Does the 74ABT125D/AUJ support hot-plug insertion in live systems?
Yes, the 74ABT125D/AUJ supports live insertion and extraction due to its IOFF circuitry, which disables outputs and blocks backflow current when VCC = 0 V, and its latch-up immunity exceeding 500 mA per JESD78B Class II Level A. This makes the 74ABT125D/AUJ suitable for backplane and modular system applications where cards are inserted into powered slots.
What is the purpose of the IOFF feature in the 74ABT125D/AUJ?
IOFF in the 74ABT125D/AUJ disables output drivers and prevents damaging backflow current when the device is unpowered (VCC = 0 V), ensuring safe operation during partial power-down sequences or hot-swap events. This feature is integral to the 74ABT125D/AUJ's design for industrial systems requiring robust power sequencing - it is not optional or external.
Can the 74ABT125D/AUJ interface directly with 3.3 V logic inputs?
No - the 74ABT125D/AUJ is a 5 V-only device (VCC = 4.5–5.5 V) with TTL-compatible input thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V), but its inputs are not 3.3 V tolerant. Driving the 74ABT125D/AUJ from 3.3 V logic may result in marginal or unreliable HIGH recognition. For mixed-voltage interfaces, level translation or a 3.3 V–compatible alternative like 74LVT125 is required.
Is the 74ABT125D/AUJ pin-compatible with other packages in the 74ABT125 family?
Yes - the 74ABT125D/AUJ (SO14/SOT108-1), 74ABT125PW (TSSOP14), and 74ABT125BQ (DHVQFN14) share identical pin functions and logic behavior, though mechanical dimensions and thermal characteristics differ. PCB layout must match the specific package; the 74ABT125D/AUJ's SO14 footprint is not mechanically interchangeable with TSSOP or QFN variants without redesign.
74ABT125D/AUJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74ABT
- 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:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
74ABT125D/AUJ FAQ
1.How can I place an order for 74ABT125D/AUJ through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT125D/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 74ABT125D/AUJ reliable?
The price and inventory of 74ABT125D/AUJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT125D/AUJ is usually 5 days.
3.What payment methods are accepted for 74ABT125D/AUJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ABT125D/AUJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ABT125D/AUJ?
74ABT125D/AUJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABT125D/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 74ABT125D/AUJ?
For technical support, including 74ABT125D/AUJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT125D/AUJ requirements.
6.How does Aetrix verify that 74ABT125D/AUJ is sourced from the original manufacturer or authorized distributors?
All 74ABT125D/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 74ABT125D/AUJ meets industry standards.
7.What is the process for return or replacement of 74ABT125D/AUJ?
All 74ABT125D/AUJ units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT125D/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 74ABT125D/AUJ part is unused and in its original packaging.
Return procedure for 74ABT125D/AUJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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