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NXP Semiconductors 74ABT125D,602
- Part No.:
- 74ABT125D,602
- Manufacturer:
- NXP Semiconductors
- Package:
- -
- Datasheet:
-
74ABT125D,602.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 14SO
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Inventory:4,248
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Product details
Overview
74ABT125D,602 from Nexperia is a quad 3-state buffer/line driver with active-low output enable inputs (1OE–4OE), designed for bus interface and signal isolation in TTL-compatible digital systems. It operates from 4.5 V to 5.5 V, delivers ±32 mA/±64 mA output drive, supports partial power-down via IOFF circuitry, and is rated for -40 °C to +85 °C ambient operation.
For engineers reviewing the 74ABT125D,602 datasheet, 74ABT125D,602 pinout, 74ABT125D,602 application, or 74ABT125D,602 equivalent, key selection criteria include 3-state timing (tPZH ≤ 5.9 ns), IOFF-enabled live insertion capability, BiCMOS-level drive strength, and SO14 package compatibility with legacy PCB footprints.
Technical Context
The device implements four independent non-inverting buffers, each with dedicated active-low enable control. Each buffer exhibits identical propagation delay characteristics (tPLH/tPHL ≤ 4.6/4.9 ns at VCC = 5.0 V) and symmetric 3-state transition times (tPZL/tPHZ ≤ 5.5/6.2 ns).
Its IOFF circuitry actively disables outputs during VCC = 0 V conditions, limiting backflow current to ±100 μA and enabling safe hot-plug operation. Input clamping voltage is specified at -1.2 V (VIK), and static input leakage remains ≤ ±1.0 μA across full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures robust operation under noisy 5 V rail conditions and tolerance to brown-out events |
| Output Drive | HIGH: -32 mA; LOW: +64 mA - drives heavy capacitive loads and multiple TTL inputs without external buffering |
| Propagation Delay | tPLH/tPHL ≤ 4.6/4.9 ns @ VCC = 5.0 V - enables high-speed bus arbitration and synchronous data routing |
| IOFF Leakage | ±100 μA @ VCC = 0 V - prevents damaging back-current during partial system power-down |
| Operating Temp | -40 °C to +85 °C - qualified for industrial-grade embedded control and communications equipment |
| ESD Rating | HBM > 2000 V, CDM > 1000 V - withstands handling and board-level ESD events per JEDEC JS-001/JS-002 |
| Input Threshold | VIL ≤ 0.8 V, VIH ≥ 2.0 V - guarantees reliable logic level recognition across TTL and CMOS interfaces |
Pinout & Package
74ABT125D,602 uses the SO14 (SOT108-1) plastic small outline package: 14-pin, 3.9 mm body width, 1.27 mm lead pitch, gull-wing leads, and standard JEDEC MS-012 footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | 1OE, 2OE, 3OE, 4OE | Active-low output enable inputs - assert LOW to activate corresponding buffer output; HIGH forces high-impedance state |
| 2, 5, 9, 12 | 1A, 2A, 3A, 4A | Buffer input terminals - accept TTL/CMOS logic levels; inputs disabled during 3-state mode |
| 3, 6, 8, 11 | 1Y, 2Y, 3Y, 4Y | Buffer output terminals - deliver inverted logic state only if external inversion is added; otherwise non-inverting |
| 7 | GND | Ground reference - common return path for all internal circuits and output current sinks |
| 14 | VCC | Positive supply - powers BiCMOS output stage and input buffers; requires local 100 nF decoupling |
Key Features
| Feature | Design Value |
|---|---|
| BiCMOS Output Stage | Enables ±64 mA sink/source capability while maintaining low propagation delay and reduced power consumption vs pure bipolar |
| IOFF Partial Power-Down | Prevents destructive backflow current when VCC = 0 V, enabling live insertion/extraction in modular backplane systems |
| Power-Up 3-State | Outputs remain in high-impedance state until VCC stabilizes, eliminating bus contention during power sequencing |
| Latch-Up Immunity | Exceeds 500 mA per JESD78B Class II - eliminates risk of destructive latch-up under transient overvoltage or ESD stress |
| TTL-Compatible Inputs | Accepts standard TTL voltage thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V) without level-shifting, simplifying mixed-logic interfacing |
Applications
| Industrial PLC Backplane Interface | Legacy ISA Bus Signal Isolation |
|---|---|
Use Scenario: Isolating address/data lines between CPU module and I/O expansion cards in programmable logic controllers. IC Role / Device Role / Timing Role: Quad 3-state buffer providing bidirectional bus separation with precise enable-controlled timing alignment. Use Value: Prevents bus contention during card hot-swap; IOFF protection avoids damage during partial power cycling of slot modules. | Use Scenario: Buffering control signals (IOR#, IOW#, MEMR#) between ISA bus master and peripheral add-in cards. IC Role / Device Role / Timing Role: Non-inverting line driver ensuring TTL-level signal integrity across long traces on legacy PC motherboards. Use Value: Delivers +64 mA sink current to meet ISA specification load requirements while maintaining sub-5 ns propagation delay. |
| Test Equipment Digital Pattern Generator | Automated Test Fixture Signal Multiplexing |
Use Scenario: Driving multiple DUT input channels from a single pattern generator output bank. IC Role / Device Role / Timing Role: Quad buffer enabling dynamic channel selection via independent OE controls for parallel test vector distribution. Use Value: Enables glitch-free channel switching with tPZL ≤ 5.5 ns, minimizing test setup overhead and improving throughput. | Use Scenario: Routing stimulus signals to different DUT pins using shared test controller resources. IC Role / Device Role / Timing Role: 3-state bus interface allowing time-multiplexed access to shared signal paths without hardware reconfiguration. Use Value: Eliminates need for mechanical relays or complex FPGA routing; reduces fixture BOM cost and improves long-term reliability. |
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,118 | Lower VCC range (2.7–3.6 V); 3.3 V only; 24 mA/24 mA drive; faster tPLH (2.1 ns typical) | Requires 3.3 V system; unsuitable for 5 V TTL buses or mixed-voltage backplanes | Select when operating exclusively in 3.3 V domains with tighter timing budgets and lower power constraints |
| SN74ABT125N | Same electrical specs but obsolete PDIP-14 package (SOT27-1); no IOFF support; higher ICC (1.5 mA typical) | Lacks live-insertion safety; incompatible with modern surface-mount assembly; not recommended for new designs | Avoid for new designs; use only for legacy repair or drop-in replacement where IOFF is not required |
Compared with 74ABT125D,602, the 74LVT125PW offers superior speed and efficiency in 3.3 V systems but sacrifices 5 V compatibility and drive strength, while the SN74ABT125N lacks critical IOFF protection and modern packaging-making the 74ABT125D,602 the optimal choice for industrial 5 V bus isolation requiring live-insertion safety.
Availability
74ABT125D,602 is available at Aetrix Electronics and suitable for industrial PLC backplane interfaces, legacy ISA bus signal isolation, and automated test fixture signal multiplexing requiring stable component supply and long-term lifecycle continuity.
Supply support for 74ABT125D,602 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 delivering high-performance, reliable discrete, logic, and MOSFET devices optimized for efficiency-critical applications.
The 74ABT series targets high-speed, robust bus interface solutions for industrial, computing, and communications infrastructure-emphasizing drive strength, timing precision, and system-level safety features like IOFF.
FAQ
What is the maximum allowable output current per pin for 74ABT125D,602?
The device supports up to +64 mA sink current (LOW-state) and -32 mA source current (HIGH-state) per output pin under recommended operating conditions (VCC = 4.5–5.5 V, Tamb = -40 °C to +85 °C). Exceeding these values risks exceeding absolute maximum ratings and may cause thermal shutdown or permanent damage.
Does 74ABT125D,602 support hot-plug insertion into a live 5 V bus?
Yes-its integrated IOFF circuitry disables outputs and limits backflow current to ±100 μA when VCC = 0 V, enabling safe live insertion and extraction in powered-backplane systems. This feature is verified per JEDEC JESD78B Class II latch-up testing and documented in Section 1 of the datasheet.
Can 74ABT125D,602 be used with 3.3 V logic inputs?
No-its input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) are optimized for 5 V TTL compatibility. While 3.3 V HIGH signals may register correctly, marginal noise margins and undefined behavior below 2.0 V VIH make it unsuitable for direct 3.3 V interface without level translation or pull-up biasing.
What is the thermal resistance (θJA) of the SO14 package for 74ABT125D,602?
The SO14 (SOT108-1) package has a junction-to-ambient thermal resistance of 100 K/W under standard JEDEC test conditions (1-layer board, 1 in² copper pad). Derating begins at 100 °C with 10.1 mW/K reduction in total power dissipation, as specified in Table 4 of the datasheet.
74ABT125D,602 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Input Type:
- -
- Output Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
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- Qualification:
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- Mounting Type:
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- Supplier Device Package:
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74ABT125D,602 FAQ
1.How can I place an order for 74ABT125D,602 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT125D,602 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,602 reliable?
The price and inventory of 74ABT125D,602 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT125D,602 is usually 5 days.
3.What payment methods are accepted for 74ABT125D,602?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ABT125D,602 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ABT125D,602?
74ABT125D,602 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABT125D,602 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,602?
For technical support, including 74ABT125D,602 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT125D,602 requirements.
6.How does Aetrix verify that 74ABT125D,602 is sourced from the original manufacturer or authorized distributors?
All 74ABT125D,602 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,602 meets industry standards.
7.What is the process for return or replacement of 74ABT125D,602?
All 74ABT125D,602 units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT125D,602, 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,602 part is unused and in its original packaging.
Return procedure for 74ABT125D,602:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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