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Nexperia USA Inc. 74ABT125BQ,115
- Part No.:
- 74ABT125BQ,115
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 14-VFQFN Exposed Pad
- Datasheet:
-
74ABT125BQ,115.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 14DHVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,780
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Product details
Overview
74ABT125BQ,115 from Nexperia is a quad 3-state buffer/line driver with independent 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 industrial temperature range.
For engineers reviewing the 74ABT125BQ,115 datasheet, 74ABT125BQ,115 pinout, 74ABT125BQ,115 application, or 74ABT125BQ,115 equivalent, this device is selected for high-speed bidirectional bus buffering where low propagation delay (≤4.9 ns), live insertion capability, and robust ESD protection (HBM >2000 V) are critical in industrial control and instrumentation designs.
Technical Context
The 74ABT125BQ implements four independent non-inverting buffers, each with dedicated active-low 3-state enable control. Its BiCMOS architecture enables TTL-level input compatibility and high-current CMOS output drive while maintaining fast switching performance.
IOFF circuitry actively disables outputs during power-down, blocking backflow current even when VCC = 0 V and input/output voltages reach up to 4.5 V - enabling safe hot-swap operation in modular backplane systems without risk of latch-up or damage.
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. |
| Propagation delay (tPLH/tPHL) | 1.0–4.9 ns at VCC = 5.0 V - supports >200 MHz bus timing in high-speed digital interfaces. |
| Output drive (LOW/HIGH) | +64 mA / –32 mA - drives heavy capacitive loads (e.g., long PCB traces or multiple TTL inputs) without signal degradation. |
| IOFF leakage (VCC = 0 V) | ±100 μA max - prevents damaging backflow current during partial system power-down. |
| ESD rating (HBM/CDM) | ≥2000 V / ≥1000 V - meets industrial handling requirements without external protection components. |
| Operating temperature | –40 °C to +85 °C - qualified for extended industrial environments including factory automation and test equipment. |
| Input clamping voltage | –1.2 V min - protects inputs against negative transients beyond GND during hot-swap events. |
Pinout & Package
DHVQFN14 (SOT762-1) package: 2.5 × 3 × 0.85 mm body, no leads, 14-terminal thermal-enhanced quad flat design with exposed thermal pad (non-soldered or floating/grounded per layout).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | 1OE, 2OE, 3OE, 4OE | Active-low enable inputs - each controls one buffer's 3-state output independently; HIGH forces high-impedance OFF-state. |
| 2, 5, 9, 12 | 1A, 2A, 3A, 4A | Data inputs - accept TTL-compatible logic levels (VIH ≥ 2.0 V, VIL ≤ 0.8 V) with ±1 μA leakage. |
| 3, 6, 8, 11 | 1Y, 2Y, 3Y, 4Y | Buffered outputs - deliver full-rail swing (VOH ≥ 2.0 V @ –32 mA, VOL ≤ 0.55 V @ +64 mA) with 7 pF typical capacitance. |
| 7 | GND | Ground reference - all internal logic and output stages referenced to this node; must be low-impedance for noise immunity. |
| 14 | VCC | Power supply - supplies BiCMOS core; requires local 100 nF decoupling adjacent to pin 14 due to fast transient current demands. |
Key Features
| Feature | Design Value |
|---|---|
| BiCMOS process technology | Combines bipolar speed and CMOS low static power - achieves sub-5 ns propagation with <1.5 mA ICC per enabled buffer. |
| IOFF partial power-down | Enables safe hot-plug operation - outputs disable automatically when VCC = 0 V, preventing backfeed into powered subsystems. |
| TTL-compatible inputs | Accepts standard TTL logic thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) without level-shifting, simplifying legacy system integration. |
| Live insertion/extraction support | Validated for hot-swap in modular backplanes - IOFF + ESD robustness eliminates need for external protection during board replacement. |
| Latch-up immunity | Exceeds JESD78B Class II Level A (>500 mA) - prevents destructive latch-up under overvoltage or ESD stress conditions. |
Applications
| Industrial PLC Backplane | Test Equipment Signal Routing |
|---|---|
Use Scenario: Isolating and driving address/data lines between CPU module and I/O expansion slots in programmable logic controllers. IC Role / Device Role / Timing Role: Quad 3-state buffer provides direction-controlled bus isolation; enables dynamic slot arbitration and hot-swap-safe data transfer. Use Value: IOFF prevents backfeed during module insertion/removal; ±64 mA drive ensures signal integrity across 15 cm backplane traces at 20 MHz. | Use Scenario: Multiplexing stimulus signals from arbitrary waveform generators to DUT pins in automated test systems. IC Role / Device Role / Timing Role: Buffer isolates source from load capacitance; independent OE control allows precise timing-gated signal routing. Use Value: 4.9 ns max tPHL enables sub-5 ns edge alignment; 7 pF CO minimizes timing skew across parallel channels. |
| Embedded Instrumentation Bus | Legacy System Interface Adapter |
Use Scenario: Interfacing microcontroller GPIOs to legacy 5 V TTL peripherals (e.g., UART transceivers, ADCs) in medical diagnostic devices. IC Role / Device Role / Timing Role: Level-tolerant buffer translates MCU logic to full 5 V swing; 3-state mode enables shared-bus contention management. Use Value: VIH = 2.0 V ensures reliable recognition of 3.3 V MCU outputs; VOL ≤ 0.55 V guarantees clean LOW detection by TTL receivers. | Use Scenario: Replacing obsolete 74LS125 in aging industrial control panels requiring drop-in functional equivalence with enhanced reliability. IC Role / Device Role / Timing Role: Pin-compatible quad buffer upgrade - maintains identical logic function while improving drive strength and ESD margin. Use Value: –32/+64 mA output replaces LS-series –0.4/+8 mA; HBM >2000 V eliminates field failures from handling-induced ESD. |
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 |
|---|---|---|---|
| SN74ABT125DBR | SSOP-14 package (SOT337-1); identical electrical specs but larger footprint and higher thermal resistance. | Preferred where manual assembly or legacy SSOP footprints exist; unsuitable for space-constrained layouts. | Select only if DHVQFN rework infrastructure is unavailable; verify thermal derating above 81 °C. |
| 74LVC125PW | 3.3 V only (1.65–3.6 V); lower drive (±24 mA); no IOFF; different pinout (OE shared per pair). | Not suitable for 5 V systems or partial power-down; requires level-shifting for TTL interfacing. | Reject for 5 V or hot-swap use; consider only in new 3.3 V designs with simplified enable architecture. |
Compared with SN74ABT125DBR, the 74ABT125BQ offers 30 % smaller area and 25 % lower θJA, enabling denser layouts and better thermal performance; versus 74LVC125PW, it provides 5 V compatibility, higher drive, and true per-buffer IOFF - making it the sole choice for industrial 5 V bus isolation with live-insertion requirements.
Availability
74ABT125BQ,115 is available at Aetrix Electronics and suitable for industrial PLC backplanes, automated test equipment signal routing, and embedded instrumentation buses requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for 74ABT125BQ,115 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 logic, analog, and MOSFET solutions optimized for efficiency, reliability, and manufacturability in industrial and automotive applications.
The 74ABT series targets high-speed, robust 5 V digital interfacing - engineered specifically for bus buffering, level translation, and hot-plug-capable system architectures in demanding industrial environments.
FAQ
Is the 74ABT125BQ,115 pin-compatible with standard 74-series quad buffers like the 74LS125?
Yes - it uses the same 14-pin functional pinout as 74LS125, 74HC125, and 74HCT125, with identical terminal assignments for inputs (A), outputs (Y), enables (OE), VCC, and GND. The DHVQFN package maintains logical pin equivalence despite physical layout differences.
What is the purpose of the exposed thermal pad on the SOT762-1 package?
The exposed pad (terminal 1 index area) is a thermal enhancement feature - it improves heat dissipation from the die. Per Nexperia guidance, it may remain electrically floating or be connected to GND; soldering is optional and does not require electrical connection to function.
Does the IOFF feature require external circuitry to operate?
No - IOFF is fully integrated and automatic. When VCC drops to 0 V, internal circuitry disables all outputs regardless of OE or input states, limiting backflow current to ±100 μA without any external components or configuration.
Can the 74ABT125BQ,115 drive multiple TTL inputs simultaneously?
Yes - its +64 mA sink capability exceeds the total DC input current requirement of up to 8 standard TTL inputs (each drawing ~1.6 mA), enabling direct fanout without additional drivers while maintaining VOL ≤ 0.55 V across temperature.
74ABT125BQ,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74ABT
- Package/Case:
- 14-VFQFN Exposed Pad
- 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-DHVQFN (2.5x3)
74ABT125BQ,115 FAQ
1.How can I place an order for 74ABT125BQ,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT125BQ,115 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 74ABT125BQ,115 reliable?
The price and inventory of 74ABT125BQ,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT125BQ,115 is usually 5 days.
3.What payment methods are accepted for 74ABT125BQ,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ABT125BQ,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ABT125BQ,115?
74ABT125BQ,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABT125BQ,115 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 74ABT125BQ,115?
For technical support, including 74ABT125BQ,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT125BQ,115 requirements.
6.How does Aetrix verify that 74ABT125BQ,115 is sourced from the original manufacturer or authorized distributors?
All 74ABT125BQ,115 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 74ABT125BQ,115 meets industry standards.
7.What is the process for return or replacement of 74ABT125BQ,115?
All 74ABT125BQ,115 units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT125BQ,115, 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 74ABT125BQ,115 part is unused and in its original packaging.
Return procedure for 74ABT125BQ,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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