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NXP Semiconductors 74ABT125DB,118
- Part No.:
- 74ABT125DB,118
- Manufacturer:
- NXP Semiconductors
- Package:
- 14-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74ABT125DB,118.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V 14SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,749
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Product details
Overview
74ABT125DB,118 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 74ABT125DB,118 datasheet, 74ABT125DB,118 pinout, 74ABT125DB,118 application, or 74ABT125DB,118 equivalent, this device is selected for high-speed bidirectional bus buffering where controlled output disable, live insertion capability, and robust ESD protection (HBM >2000 V, CDM >1000 V) are required.
Technical Context
The 74ABT125DB,118 implements four independent non-inverting buffers, each with dedicated active-low 3-state enable control. Its BiCMOS architecture enables TTL-level input compatibility and fast propagation delays (tPLH/tPHL ≤ 4.6 ns at VCC = 5.0 V).
IOFF circuitry actively disables outputs during power-down, blocking backflow current even when VCC = 0 V and inputs/outputs are biased up to 4.5 V. Input clamping voltage is specified at -1.2 V, and power-up 3-state behavior ensures outputs remain high-impedance until VCC stabilizes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures stable operation across standard 5 V rail tolerances and brown-out resilience. |
| Output Drive | HIGH: -32 mA; LOW: +64 mA - Supports heavy capacitive loads and fan-out to multiple TTL inputs without external buffering. |
| Propagation Delay | tPLH/tPHL ≤ 4.6 ns @ VCC = 5.0 V - Enables reliable timing in sub-5 ns clock domains and high-speed data buses. |
| IOFF Leakage | ±100 μA @ VCC = 0 V - Prevents damaging back-current during hot-swap or partial system power-down sequences. |
| ESD Protection | HBM >2000 V, CDM >1000 V - Meets industrial-grade handling requirements without additional protection circuitry. |
| Operating Temperature | -40 °C to +85 °C - Qualified for extended industrial environments including factory automation and telecom infrastructure. |
| Input Compatibility | TTL-level - Directly interfaces with legacy 74LS/74F logic without level-shifting components. |
Pinout & Package
74ABT125DB,118 is packaged in SSOP14 (SOT337-1), a 14-lead plastic shrink small outline package with 0.65 mm lead pitch and body width of 5.3 mm. Pin 1 is marked by a notch or dot; pin numbering follows standard counter-clockwise convention from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | 1OE, 2OE, 3OE, 4OE | Active-low output enable inputs - Asserting LOW enables corresponding buffer; HIGH forces high-impedance output state. |
| 2, 5, 9, 12 | 1A, 2A, 3A, 4A | Buffer input terminals - Accept TTL-compatible logic signals; internally disabled during 3-state mode. |
| 3, 6, 8, 11 | 1Y, 2Y, 3Y, 4Y | Buffer output terminals - Deliver inverted logic (non-inverting function) with full drive strength or enter high-Z when OE is HIGH. |
| 7 | GND | Ground reference - Serves as return path for all internal currents and defines logic LOW reference. |
| 14 | VCC | Positive supply - Powers internal BiCMOS circuitry; requires local 0.1 μF decoupling per device. |
Key Features
| Feature | Design Value |
|---|---|
| BiCMOS process technology | Combines bipolar speed and CMOS low static power - achieves <5 ns propagation delay while maintaining ICC <1.5 mA per enabled buffer. |
| Power-up 3-state | Outputs remain high-impedance until VCC reaches functional threshold - prevents bus contention during power sequencing. |
| Live insertion/extraction support | IOFF and latch-up immunity (>500 mA) allow safe board replacement in powered-backplane systems without shutdown. |
| Multiple package options | SSOP14 (SOT337-1) footprint - offers improved thermal performance and reduced PCB area vs SO14, compatible with automated assembly. |
| Input disable during 3-state | Input circuitry is gated off when OE is HIGH - eliminates dynamic current draw and noise coupling on unused inputs. |
Applications
| Industrial PLC Backplane Interface | Legacy System Bus Isolation |
|---|---|
Use Scenario: Isolating CPU address/data buses from modular I/O expansion slots in programmable logic controllers. IC Role / Device Role / Timing Role: Quad buffer provides direction-controlled, enable-gated signal routing between master and slave modules with precise timing alignment. Use Value: 4.6 ns max propagation delay ensures setup/hold compliance across 20+ MHz backplane clocks; IOFF prevents backfeed during hot-swap of I/O cards. |
Use Scenario: Interfacing modern microcontrollers to legacy 74LS-based peripheral subsystems (e.g., display drivers, keypad scanners). IC Role / Device Role / Timing Role: Level-translating buffer bridges voltage and drive mismatch between 3.3 V MCU GPIOs and 5 V TTL loads. Use Value: TTL-compatible inputs accept 2.0 V VIH and 0.8 V VIL thresholds; ±64 mA sink capability drives multiple LS inputs without external transistors. |
| Test Equipment Signal Routing | Telecom Line Card Data Multiplexing |
Use Scenario: Dynamic reconfiguration of signal paths in automated test equipment (ATE) channel matrices. IC Role / Device Role / Timing Role: 3-state enable lines allow time-multiplexed sharing of common measurement buses among DUT channels. Use Value: tPZH/tPLZ ≤ 6.8 ns guarantees fast bus release (<7 ns), minimizing dead time between test vector transitions. |
Use Scenario: Managing parallel status/control signals across redundant line card slots in carrier-grade access switches. IC Role / Device Role / Timing Role: Buffer isolates shared control bus from individual card logic, preventing fault propagation. Use Value: Latch-up immunity >500 mA and HBM >2000 V withstand repeated electrostatic events in field-replaceable module handling. |
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 typ) | Designed for mixed-voltage 3.3 V systems; not 5 V tolerant; unsuitable for direct TTL interface | Select when operating exclusively at 3.3 V and requiring lower power or higher speed; verify input voltage compatibility. |
| SN74ABT125N | SO14 (SOT108-1) package; identical electrical specs; no SSOP variant; discontinued per Nexperia v.8 revision | Larger footprint; higher thermal resistance; limited availability; lacks SSOP's board-area efficiency | Use only if legacy SO14 layout must be preserved; prefer 74ABT125DB,118 for new designs requiring compactness and thermal performance. |
Compared with 74LVT125PW,118, the 74ABT125DB,118 supports full 5 V TTL interoperability and higher drive strength, while SN74ABT125N shares identical logic but lacks modern packaging and long-term supply assurance.
Availability
74ABT125DB,118 is available at Aetrix Electronics and suitable for industrial PLC backplanes, legacy bus interfacing, ATE signal routing, and telecom line card multiplexing requiring stable component supply, long-lifecycle support, and SSOP14 packaging.
Supply support for 74ABT125DB,118 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 logic, discrete, and MOSFET solutions for industrial, automotive, and computing markets.
The 74ABT series targets high-speed, robust bus interface applications where TTL compatibility, 3-state control, and partial power-down capability are essential - optimized for factory automation, test equipment, and infrastructure systems.
FAQ
Is 74ABT125DB,118 pin-compatible with standard 74-series quad buffers like 74LS125?
Yes - it uses the same 14-pin SSOP14 pinout as industry-standard quad 3-state buffers. Pin assignments for inputs (1A–4A), outputs (1Y–4Y), enables (1OE–4OE), VCC, and GND match JEDEC-standard logic layouts, enabling drop-in replacement where voltage and drive requirements align.
Does 74ABT125DB,118 support mixed-voltage operation (e.g., 3.3 V inputs with 5 V VCC)?
No - inputs are TTL-compatible but not 5 V-tolerant when VCC = 3.3 V. With VCC = 5 V, VIH is 2.0 V min and VIL is 0.8 V max, allowing safe interface to 3.3 V logic outputs driving into 5 V rails, provided output VOH/VOL meet those thresholds.
What is the thermal performance difference between SSOP14 (SOT337-1) and SO14 (SOT108-1) packages?
The SSOP14 package (SOT337-1) has lower thermal resistance than SO14: typical RθJA is 110 K/W vs 130 K/W. This allows higher sustained output current (e.g., 64 mA sink) at elevated ambient temperatures without exceeding junction limits, critical in dense industrial PCB layouts.
Can 74ABT125DB,118 be used in hot-swap applications without external protection?
Yes - its integrated IOFF circuitry and >500 mA latch-up immunity per JESD78B Class II permit live insertion/extraction in powered-backplane systems. No external current-limiting resistors or TVS diodes are required for basic hot-swap functionality under specified voltage and current limits.
74ABT125DB,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74ABT
- Package/Case:
- 14-SSOP (0.209", 5.30mm Width)
- Packaging:
- Bulk
- 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-SSOP
74ABT125DB,118 FAQ
1.How can I place an order for 74ABT125DB,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT125DB,118 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 74ABT125DB,118 reliable?
The price and inventory of 74ABT125DB,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT125DB,118 is usually 5 days.
3.What payment methods are accepted for 74ABT125DB,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ABT125DB,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ABT125DB,118?
74ABT125DB,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABT125DB,118 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 74ABT125DB,118?
For technical support, including 74ABT125DB,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT125DB,118 requirements.
6.How does Aetrix verify that 74ABT125DB,118 is sourced from the original manufacturer or authorized distributors?
All 74ABT125DB,118 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 74ABT125DB,118 meets industry standards.
7.What is the process for return or replacement of 74ABT125DB,118?
All 74ABT125DB,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT125DB,118, 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 74ABT125DB,118 part is unused and in its original packaging.
Return procedure for 74ABT125DB,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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