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NXP Semiconductors 74ABT125PW/AUJ
- Part No.:
- 74ABT125PW/AUJ
- Manufacturer:
- NXP Semiconductors
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74ABT125PW/AUJ.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,929
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Product details
Overview
74ABT125PW/AUJ from Nexperia is a quad 3-state buffer/line driver IC 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 -40 °C to +85 °C ambient operation, and features IOFF partial power-down protection. It is used in industrial control backplanes where hot-swap capability and bus contention prevention are required.
For engineers reviewing the 74ABT125PW/AUJ datasheet, 74ABT125PW/AUJ pinout, 74ABT125PW/AUJ application, or 74ABT125PW/AUJ equivalent, key selection criteria include guaranteed 3-state timing (tPZH ≤ 5.9 ns), BiCMOS output drive strength, IOFF-enabled live insertion support, and TSSOP14 package compatibility with high-density PCB layouts.
Technical Context
This device implements four independent non-inverting buffers, each with an active-low 3-state enable input (nOE). Each buffer exhibits identical propagation delays (tPLH/tPHL ≤ 4.6/4.9 ns) and transition times under 5 V supply, with matched rise/fall characteristics enabling clean bus switching.
The IOFF circuitry actively disables outputs when VCC = 0 V, limiting backflow current to ±100 μA and enabling safe partial power-down in mixed-voltage systems. Inputs remain functional during 3-state mode only when powered; they are electrically disabled when outputs are tri-stated but VCC is active.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 4.5 V to 5.5 V - ensures robust operation across industrial 5 V rail tolerances. |
| Output drive | HIGH: -32 mA; LOW: +64 mA - drives heavy TTL loads and multiple inputs without external buffering. |
| Propagation delay | tPLH/tPHL ≤ 4.6/4.9 ns at VCC = 5.0 V - enables sub-5 ns bus turnaround in high-speed control logic. |
| IOFF leakage | ±100 μA at VCC = 0 V - prevents damaging backfeed current during hot-swap or partial shutdown. |
| Operating temperature | -40 °C to +85 °C - qualified for extended industrial environments without derating. |
| ESD rating | HBM > 2000 V, CDM > 1000 V - withstands handling and board-level ESD events per JS-001/JS-002. |
| Input clamping voltage | VIK ≤ -1.2 V - protects against negative transients on data or enable lines. |
Pinout & Package
TSSOP14 package (SOT402-1): plastic thin shrink small outline, 14-lead, 4.4 mm body width, 0.65 mm pitch, 0.8 mm max height - optimized for automated assembly and thermal performance in space-constrained boards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | nOE (active LOW) | Independent 3-state enable per buffer; asserts high-impedance output when HIGH. |
| 2, 5, 9, 12 | nA (input) | Non-inverting data input; compatible with TTL logic thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V). |
| 3, 6, 8, 11 | nY (output) | Buffered non-inverting output; supports ±64 mA sink/source and IOFF protection. |
| 7 | GND | Reference ground for all I/O and internal circuitry; requires low-impedance PCB connection. |
| 14 | VCC | Primary 5 V supply; powers internal BiCMOS logic and output stages. |
Key Features
| Feature | Design Value |
|---|---|
| BiCMOS process technology | Combines bipolar speed and CMOS low static power - achieves <5 ns propagation with <1.5 mA ICC (enabled). |
| Power-up 3-state | Outputs remain in high-impedance state until VCC stabilizes - prevents bus contention during power sequencing. |
| Live insertion/extraction support | IOFF and input disable during 3-state ensure safe hot-plug into live backplanes without system reset. |
| Latch-up immunity | Exceeds 500 mA per JESD78B Class II Level A - eliminates risk of destructive latch-up in noisy industrial environments. |
| Quad bus interface architecture | Four independent channels share no internal coupling - enables selective bus segment isolation without cross-talk. |
Applications
| Industrial PLC Backplane Interface | Test Equipment Signal Routing |
|---|---|
Use Scenario: Isolating CPU address/data buses from modular I/O cards in programmable logic controllers. IC Role / Device Role / Timing Role: Quad buffer provides direction-controlled, contention-free bus extension with sub-5 ns enable/disable transitions. Use Value: Enables real-time hot-swap of I/O modules while maintaining deterministic bus timing and preventing signal corruption. | Use Scenario: Switching measurement signals between DUT ports and instrumentation in automated test systems. IC Role / Device Role / Timing Role: 3-state buffers isolate signal paths during reconfiguration; IOFF prevents backfeed when instrument channels are powered down. Use Value: Eliminates need for mechanical relays or complex power sequencing, reducing test head size and improving reliability. |
| Legacy System Bus Extender | Embedded Controller Peripheral Interface |
Use Scenario: Interfacing modern microcontrollers to legacy 5 V TTL parallel buses (e.g., ISA, GPIB auxiliary lines). IC Role / Device Role / Timing Role: Level-shifting and fanout buffer with TTL-compatible input thresholds and 64 mA drive capability. Use Value: Allows direct connection without external pull-ups or discrete transistors, simplifying redesign of aging equipment. | Use Scenario: Driving multiple peripheral enable lines (e.g., ADC, DAC, memory) from a single controller GPIO bank. IC Role / Device Role / Timing Role: Output expander with independent 3-state control per channel; decouples peripheral activation timing. Use Value: Reduces GPIO count requirement by 4× while supporting staggered peripheral wake-up sequences. |
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 supply range (2.7–3.6 V); 3.3 V logic only; 12 mA/12 mA drive | Not suitable for 5 V TTL systems; requires level translation for legacy interfaces | Select only for new 3.3 V designs requiring lower power and smaller die size |
| SN74ABT125DBR | SSOP14 package (SOT337-1); identical electrical specs; 5.3 mm body width | Requires PCB layout change due to wider footprint and different thermal pad configuration | Choose when SSOP14 is already standardized in production and TSSOP14 requalification is impractical |
Compared with 74ABT125PW/AUJ, the 74LVT125PW lacks 5 V tolerance and drive strength needed for TTL bus loading, while the SN74ABT125DBR matches functionality but demands mechanical redesign - making 74ABT125PW/AUJ optimal for new 5 V industrial designs prioritizing density and hot-swap integrity.
Availability
74ABT125PW/AUJ is available at Aetrix Electronics and suitable for industrial PLC backplanes, automated test equipment signal routing, legacy system bus extension, and embedded controller peripheral interfacing requiring stable component supply and long-term manufacturability.
Supply support for 74ABT125PW/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 delivering high-performance, reliable logic, analog, and MOSFET solutions for industrial, automotive, and consumer markets.
The 74ABT125 product line delivers advanced BiCMOS-based 3-state buffers optimized for robust 5 V TTL bus interfacing, hot-swap resilience, and high-density packaging in industrial control and test systems.
FAQ
What is the maximum allowable supply voltage for the 74ABT125PW/AUJ?
The absolute maximum supply voltage for the 74ABT125PW/AUJ is +7.0 V, but the recommended operating range is strictly 4.5 V to 5.5 V. Operation above 5.5 V risks exceeding static and dynamic specifications, including increased ICC and potential degradation of IOFF protection. The 74ABT125PW/AUJ must be operated within its specified 4.5–5.5 V window to guarantee timing, drive strength, and latch-up immunity as documented in the Rev. 11 datasheet.
Does the 74ABT125PW/AUJ support live insertion in powered backplanes?
Yes, the 74ABT125PW/AUJ supports live insertion via its IOFF circuitry and input disable during 3-state mode. When VCC = 0 V, IOFF limits backflow current to ±100 μA, and inputs are electrically isolated from internal nodes. This allows safe insertion into a live 5 V backplane without disrupting other modules. The 74ABT125PW/AUJ is explicitly characterized for this use case in Section 1 of the datasheet and validated per JESD78B Class II latch-up testing.
What is the worst-case propagation delay from input to output for the 74ABT125PW/AUJ?
The worst-case HIGH-to-LOW propagation delay (tPHL) for the 74ABT125PW/AUJ is 4.9 ns, and LOW-to-HIGH (tPLH) is 4.6 ns, both specified over the full -40 °C to +85 °C temperature range at VCC = 5.0 V ± 0.5 V. These values are measured from input transition at 1.5 V to output crossing 1.5 V under 50 pF load. The 74ABT125PW/AUJ maintains these delays across its entire operating envelope without derating.
How does the 74ABT125PW/AUJ handle input signals when outputs are in 3-state mode?
When outputs are in 3-state mode (nOE = HIGH), the 74ABT125PW/AUJ disables internal input circuitry - inputs are effectively disconnected from the output stage and do not load the driving source. This is confirmed in Section 2 ("Features and benefits") and Table 3 ("Function selection"), where nA remains irrelevant (X) when nOE = H. The 74ABT125PW/AUJ thus prevents unintended signal coupling or excessive input current draw during bus isolation.
Is the 74ABT125PW/AUJ pin-compatible with other packages in the 74ABT125 family?
No - the 74ABT125PW/AUJ (TSSOP14, SOT402-1) has identical pin numbering and function mapping to the SO14 (74ABT125D) and DHVQFN14 (74ABT125BQ) variants per Section 5.1 of the datasheet, but mechanical pin pitch (0.65 mm), body dimensions, and thermal pad presence differ. While logic behavior and pinout are consistent, PCB layout is not interchangeable. The 74ABT125PW/AUJ requires its own footprint per Figure 8 and cannot be substituted without board revision.
74ABT125PW/AUJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74ABT
- Package/Case:
- 14-TSSOP (0.173", 4.40mm 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-TSSOP
74ABT125PW/AUJ FAQ
1.How can I place an order for 74ABT125PW/AUJ through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT125PW/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 74ABT125PW/AUJ reliable?
The price and inventory of 74ABT125PW/AUJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT125PW/AUJ is usually 5 days.
3.What payment methods are accepted for 74ABT125PW/AUJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ABT125PW/AUJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ABT125PW/AUJ?
74ABT125PW/AUJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABT125PW/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 74ABT125PW/AUJ?
For technical support, including 74ABT125PW/AUJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT125PW/AUJ requirements.
6.How does Aetrix verify that 74ABT125PW/AUJ is sourced from the original manufacturer or authorized distributors?
All 74ABT125PW/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 74ABT125PW/AUJ meets industry standards.
7.What is the process for return or replacement of 74ABT125PW/AUJ?
All 74ABT125PW/AUJ units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT125PW/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 74ABT125PW/AUJ part is unused and in its original packaging.
Return procedure for 74ABT125PW/AUJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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