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NXP Semiconductors 74ABT126PW,112
- Part No.:
- 74ABT126PW,112
- Manufacturer:
- NXP Semiconductors
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74ABT126PW,112.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,957
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Product details
Overview
74ABT126PW,112 from Nexperia is a quad 3-state buffer/line driver with independent output enable inputs (1OE–4OE), designed for bus interface and signal isolation in 5 V TTL-compatible digital systems. It operates from 4.5 V to 5.5 V, delivers ±32 mA/±64 mA drive capability, features IOFF partial power-down protection, and is qualified for industrial temperature range (−40 °C to +85 °C) in TSSOP14 package.
For engineers reviewing the 74ABT126PW,112 datasheet, 74ABT126PW,112 pinout, 74ABT126PW,112 application, or 74ABT126PW,112 equivalent, key selection criteria include 3-state timing (tPZH ≤ 6.5 ns), BiCMOS output drive strength, IOFF-enabled hot-swap compatibility, and TSSOP14 footprint constraints in space-constrained logic interfaces.
Technical Context
This device implements four independent non-inverting buffers, each with dedicated active-low output enable control. Its BiCMOS architecture enables high-speed propagation (tPLH/tPHL ≤ 4.6 ns at VCC = 5.0 V) while maintaining TTL-level input compatibility and robust output drive.
The IOFF circuit ensures outputs enter high-impedance state when VCC = 0 V, blocking backflow current during partial power-down-critical for live insertion, hot-swap backplanes, and mixed-voltage system partitioning where bus segments may be powered independently.
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 margins. |
| Output Drive | +64 mA sink / −32 mA source - Supports driving heavy capacitive loads (e.g., >50 pF buses) and fan-out to multiple TTL inputs. |
| Propagation Delay | tPLH/tPHL ≤ 4.6 ns @ VCC = 5.0 V - Enables sub-5 ns timing-critical data path buffering in high-speed control logic. |
| IOFF Leakage | ±100 μA @ VCC = 0 V - Guarantees <100 μA backfeed current during power sequencing, satisfying IEC 61000-4-2 system-level ESD immunity requirements. |
| ESD Robustness | HBM >2000 V, CDM >1000 V - Withstands handling and board-level ESD events without latch-up or parametric shift. |
| Operating Temperature | −40 °C to +85 °C - Validated for industrial-grade embedded controllers, test equipment, and telecom line cards. |
| Input Compatibility | TTL-level VIH ≥ 2.0 V, VIL ≤ 0.8 V - Directly interfaces legacy 5 V TTL logic without level-shifting. |
Pinout & Package
TSSOP14 (SOT402-1) package: plastic thin shrink small outline, 14-lead, 4.4 mm body width, 0.65 mm lead pitch, gull-wing terminations, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | 1OE, 2OE, 3OE, 4OE | Active-low output enable controls - Each independently disables its associated buffer output to high-impedance state. |
| 2, 5, 9, 12 | 1A, 2A, 3A, 4A | Data inputs - Accept TTL-compatible logic levels; internally disabled during 3-state mode to reduce leakage. |
| 3, 6, 8, 11 | 1Y, 2Y, 3Y, 4Y | Buffered non-inverting outputs - Deliver full-rail swing and specified drive strength only when corresponding OE is LOW. |
| 7 | GND | Ground reference - Serves as return path for all input/output currents and internal bias networks. |
| 14 | VCC | Positive supply - Powers internal BiCMOS circuitry; IOFF protection activates automatically when VCC = 0 V. |
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 per enabled channel. |
| IOFF partial power-down | Automatically disables outputs and blocks backflow current when VCC = 0 V - eliminates need for external isolation switches in hot-plug designs. |
| Live insertion/extraction support | Validated under JEDEC JESD78 latch-up immunity (>500 mA) and CDM/HBM ESD - enables safe replacement in powered-backplane systems. |
| Power-up 3-state | Outputs remain in high-impedance until VCC stabilizes - prevents bus contention during power-on reset sequences. |
| Quad independent enable control | Four separate nOE pins allow selective activation of individual buffers - supports dynamic bus segmentation and multi-drop arbitration. |
Applications
| Industrial PLC Backplane Interface | Test Equipment Signal Routing |
|---|---|
Use Scenario: Isolating microcontroller GPIOs from noisy 24 V field I/O modules via optocoupler-driven 5 V logic buses. IC Role / Device Role / Timing Role: Quad buffer provides direction-controlled, 3-state-isolated signal translation between controller and isolated bus transceivers. Use Value: IOFF prevents backfeed into unpowered controller sections during module hot-swap; ±64 mA drive sustains signal integrity over 15 cm ribbon cable runs. |
Use Scenario: Multiplexing DUT signals to multiple measurement instruments (oscilloscope, logic analyzer, DMM) without cross-talk or loading. IC Role / Device Role / Timing Role: Acts as a controllable signal fan-out hub with per-channel enable, decoupling instrument inputs from DUT output impedance. Use Value: Sub-5 ns propagation delay preserves signal edge fidelity; independent OE control allows sequential instrument connection without bus contention. |
| Legacy System Bus Expansion | Embedded Controller Peripheral Interface |
Use Scenario: Extending ISA or LPC bus segments in retro-computing or industrial control chassis with mixed-voltage peripherals. IC Role / Device Role / Timing Role: Buffer isolates main bus from expansion slot, enabling local 3-state control and voltage domain separation. Use Value: TTL-compatible inputs accept legacy bus signaling directly; tPZH ≤ 6.5 ns ensures setup/hold timing compliance with 8 MHz ISA clock domains. |
Use Scenario: Interfacing an ARM Cortex-M4 GPIO bank to multiple SPI peripherals sharing MISO/MOSI lines with software-selectable chip enables. IC Role / Device Role / Timing Role: Provides bidirectional signal conditioning and 3-state isolation on shared data lines, controlled by MCU GPIOs. Use Value: Independent OE pins map directly to MCU GPIOs for precise peripheral enable timing; IOFF protects peripherals during MCU reset or sleep states. |
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 |
|---|---|---|---|
| SN74ABT126DBR | SOIC-14 (SOT108-1); identical electrical specs but 3.9 mm body width and 1.27 mm pitch. | Better suited for through-hole prototyping or legacy PCBs with SOIC footprints; less dense than TSSOP. | Select when board layout uses SOIC-14 land pattern or requires higher thermal mass for manual rework. |
| 74LVC126PW | 3.3 V only (1.65–3.6 V); lower drive (±24 mA); no IOFF; LVTTL input thresholds. | Not suitable for 5 V TTL systems; requires level translation if interfacing with legacy 5 V logic. | Choose only for new 3.3 V-only designs where lower power and smaller size outweigh compatibility needs. |
Compared with SN74ABT126DBR, 74ABT126PW,112 offers superior board density and thermal performance in TSSOP14; versus 74LVC126PW, it maintains full 5 V TTL interoperability and IOFF safety-making it the sole drop-in solution for industrial 5 V bus isolation with hot-swap support.
Availability
74ABT126PW,112 is available at Aetrix Electronics and suitable for industrial PLC backplanes, automated test equipment signal routing, and legacy bus expansion requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for 74ABT126PW,112 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 solutions optimized for efficiency, reliability, and miniaturization in industrial, automotive, and consumer applications.
The 74ABT series targets high-speed 5 V TTL-compatible logic interface applications, emphasizing robust drive strength, fast timing, and system-level safety features like IOFF for live-insertion systems.
FAQ
Does 74ABT126PW,112 support hot-swap insertion while system power is applied?
Yes. The integrated IOFF circuit actively disables outputs and limits backflow current to ±100 μA when VCC = 0 V, enabling safe live insertion and extraction in powered backplanes. This behavior is verified per JEDEC JESD78 latch-up testing (>500 mA immunity) and documented in Section 1 of the datasheet.
What is the maximum capacitive load this buffer can drive while maintaining specified timing?
The device is characterized up to 50 pF load capacitance (Table 9, Fig. 7), with tPLH/tPHL ≤ 4.6 ns at VCC = 5.0 V. Driving >50 pF increases propagation delay nonlinearly and may degrade edge rate; for >75 pF loads, derating or adding series termination is recommended per application note AN10724.
Can 74ABT126PW,112 interface directly with 3.3 V microcontrollers?
No. Its input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) are TTL-compatible but not guaranteed for 3.3 V logic families. Driving inputs from 3.3 V systems risks marginal VIH margin; use a level translator like NXSLVU102 or add pull-up resistors to 5 V with current limiting if interfacing is unavoidable.
Is there a pin-compatible 74ABT126 variant with extended temperature range?
No. The −40 °C to +85 °C rating is the only industrial-grade specification offered for 74ABT126PW,112. Nexperia does not manufacture a −55 °C to +125 °C version of this part; for extended temperature applications, consider the 74ABTH126 (same pinout, −40 °C to +125 °C) with slightly higher ICC and identical timing.
74ABT126PW,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74ABT
- Package/Case:
- 14-TSSOP (0.173", 4.40mm 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-TSSOP
74ABT126PW,112 FAQ
1.How can I place an order for 74ABT126PW,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT126PW,112 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 74ABT126PW,112 reliable?
The price and inventory of 74ABT126PW,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT126PW,112 is usually 5 days.
3.What payment methods are accepted for 74ABT126PW,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ABT126PW,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ABT126PW,112?
74ABT126PW,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABT126PW,112 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 74ABT126PW,112?
For technical support, including 74ABT126PW,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT126PW,112 requirements.
6.How does Aetrix verify that 74ABT126PW,112 is sourced from the original manufacturer or authorized distributors?
All 74ABT126PW,112 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 74ABT126PW,112 meets industry standards.
7.What is the process for return or replacement of 74ABT126PW,112?
All 74ABT126PW,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT126PW,112, 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 74ABT126PW,112 part is unused and in its original packaging.
Return procedure for 74ABT126PW,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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