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NXP Semiconductors 74ABT126D,602
- Part No.:
- 74ABT126D,602
- Manufacturer:
- NXP Semiconductors
- Package:
- -
- Datasheet:
-
74ABT126D,602.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 14SO
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Inventory:13,409
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Product details
Overview
74ABT126D,602 from Nexperia is a quad 3-state buffer/line driver in SO14 package, operating at 4.5–5.5 V supply, delivering ±32 mA/±64 mA output drive, with IOFF partial power-down protection and TTL-compatible inputs. It serves as a bidirectional bus interface in industrial control backplanes and legacy system upgrades requiring robust level translation and hot-swap capability.
For engineers reviewing the 74ABT126D,602 datasheet, 74ABT126D,602 pinout, 74ABT126D,602 application, or 74ABT126D,602 equivalent, this device is selected for high-speed (≤4.6 ns propagation), low-leakage (±5 μA IOFF), and latch-up-resistant (≥500 mA JESD78) bus buffering where power sequencing and live insertion are critical.
Technical Context
The 74ABT126D implements four independent non-inverting buffers, each with dedicated active-low output enable (nOE) controlling high-impedance OFF-state entry. Its BiCMOS architecture enables TTL-level input compatibility while sustaining rail-to-rail CMOS output swing under load.
IOFF circuitry actively disables outputs during VCC = 0 V, blocking reverse current flow to prevent damage in partial power-down systems. Input clamping diodes and ESD structures (HBM >2000 V, CDM >1000 V) support rugged board-level integration without external protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures stable operation across industrial-grade 5 V rails with ±10% tolerance. |
| Output Drive | +64 mA / −32 mA - Supports driving heavy capacitive loads (e.g., 50 pF buses) and fan-out to multiple TTL inputs. |
| Propagation Delay | 1.0–4.6 ns - Enables sub-5 ns timing-critical bus buffering in high-speed digital backplanes. |
| IOFF Leakage | ±5.0 μA at VCC = 0 V - Guarantees <5 μA backflow current during power-down, protecting upstream drivers. |
| Input Thresholds | VIL ≤ 0.8 V, VIH ≥ 2.0 V - Directly interfaces unbuffered TTL logic without level-shifting components. |
| ESD Robustness | HBM >2000 V, CDM >1000 V - Survives handling and board assembly without additional ESD safeguards. |
Pinout & Package
74ABT126D,602 uses SO14 (SOT108-1) plastic small outline package: 14-pin, 3.9 mm body width, 1.27 mm lead pitch, gull-wing leads, JEDEC MS-012 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | nOE₁–nOE₄ | Active-low output enable inputs - Assert LOW to place corresponding Y-output in high-impedance state. |
| 2, 5, 9, 12 | A₁–A₄ | Data inputs - Accept TTL-compatible signals; disabled during 3-state mode (no input current path). |
| 3, 6, 8, 11 | Y₁–Y₄ | Buffered non-inverting outputs - Deliver full-rail CMOS swing with ±64 mA sink/source capability. |
| 7 | GND | Ground reference - Shared return for all I/O and supply paths; must be low-inductance connection. |
| 14 | VCC | Positive supply - Powers internal BiCMOS circuitry; requires local 100 nF decoupling near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Partial Power-down (IOFF) | Enables safe hot-plug operation by disabling outputs and blocking reverse current when VCC = 0 V. |
| TTL Input Compatibility | Accepts standard TTL voltage thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V) without pull-ups or level shifters. |
| Live Insertion Support | Withstands powered-backplane insertion due to IOFF + ESD-hardened inputs and outputs. |
| High Sink/Source Asymmetry | +64 mA sink / −32 mA source allows driving asymmetric loads like terminated transmission lines or LED indicators. |
| Latch-up Immunity | JESD78-compliant ≥500 mA immunity prevents destructive latch-up during transient overvoltage events. |
Applications
| Industrial Backplane Buffering | Legacy System Bus Isolation |
|---|---|
|
Use Scenario: Isolating CPU address/data buses from peripheral expansion slots in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Quad non-inverting buffer with per-channel 3-state control synchronizes bus access and prevents contention during slot reconfiguration. Use Value: Sub-5 ns propagation delay ensures timing compliance with 20+ MHz parallel bus cycles; IOFF prevents backfeed during hot-swap of I/O modules. |
Use Scenario: Interfacing 5 V TTL microcontrollers to legacy ISA-bus peripherals in test equipment. IC Role / Device Role / Timing Role: Level-translating buffer enabling direct connection between modern MCUs and vintage ISA cards without external resistors. Use Value: TTL-compatible inputs eliminate need for pull-up networks; ±64 mA drive sustains signal integrity across 12-inch ISA traces. |
| Test Fixture Signal Conditioning | Programmable Logic Interface |
|
Use Scenario: Driving DUT inputs in automated test equipment (ATE) with precise timing and load matching. IC Role / Device Role / Timing Role: Precision-controlled buffer providing repeatable edge rates and impedance-matched drive into 50 Ω fixtures. Use Value: 1.0 ns min tPLH/tPHL guarantees deterministic setup/hold margins; 7 pF CO minimizes signal distortion on high-Z probe points. |
Use Scenario: Connecting FPGA I/O banks to external memory or display controllers in embedded vision systems. IC Role / Device Role / Timing Role: Bus interface buffer isolating FPGA pins from noisy memory bus transients and enabling shared data lines. Use Value: 50 pF max load capacitance tolerance supports 10+ memory devices on same bus; HBM >2000 V protects FPGA I/O from ESD coupling. |
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 |
|---|---|---|---|
| SN74ABT126N | Same ABT family, PDIP-14 package; higher thermal resistance (θJA = 70 °C/W vs. SO14's 110 °C/W); identical electrical specs. | Preferred for through-hole prototyping or legacy PCBs with DIP footprints; unsuitable for space-constrained SMT designs. | Select when manual soldering or socket-based validation is required; avoid for high-density or thermally constrained layouts. |
| 74LVC126APW | Lower VCC range (1.65–3.6 V); CMOS-only process; 24 mA drive; no IOFF; 3.3 V logic only. | Designed for modern low-voltage systems; incompatible with 5 V TTL buses or partial power-down schemes. | Choose only for 3.3 V domains with no 5 V interoperability or power sequencing requirements. |
Compared with SN74ABT126N and 74LVC126APW, the 74ABT126D,602 uniquely combines 5 V TTL compatibility, IOFF-enabled hot-swap safety, and SO14 surface-mount efficiency-making it irreplaceable in industrial backplane and mixed-voltage upgrade scenarios.
Availability
74ABT126D,602 is available at Aetrix Electronics and suitable for industrial automation backplanes, legacy system upgrades, and test fixture signal conditioning requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for 74ABT126D,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 focused on high-volume, high-reliability logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.
The 74ABT series targets industrial-grade bus interface applications demanding robustness, speed, and power sequencing resilience-designed specifically for legacy system modernization and ruggedized digital infrastructure.
FAQ
Does 74ABT126D,602 support live insertion in powered backplanes?
Yes. Its IOFF circuitry disables outputs and blocks reverse current when VCC = 0 V, and its ESD protection (HBM >2000 V, CDM >1000 V) withstands contact discharge during hot-plug events. This meets IEC 61000-4-2 Level 2 requirements for field-serviceable modules.
What is the maximum capacitive load the 74ABT126D,602 can drive reliably?
The device is characterized up to 50 pF load capacitance (per Table 9), with propagation delays specified under that condition. Driving >50 pF may increase tPLH/tPHL beyond 4.6 ns and risk signal integrity; for heavier loads, add series termination or reduce trace length.
Can 74ABT126D,602 interface directly with 3.3 V logic inputs?
No. Its VIH minimum is 2.0 V at VCC = 4.5 V, but 3.3 V logic outputs may not guarantee sufficient noise margin when driving ABT inputs. Use a level translator (e.g., TXB0104) or select 74LVC126 for native 3.3 V compatibility.
Is the SO14 package RoHS-compliant and lead-free?
Yes. The 74ABT126D,602 in SOT108-1 package conforms to RoHS Directive 2011/65/EU and is lead-free, with matte tin (Sn) lead finish and halogen-free molding compound, verified per Nexperia's material declarations.
74ABT126D,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:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
74ABT126D,602 FAQ
1.How can I place an order for 74ABT126D,602 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT126D,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 74ABT126D,602 reliable?
The price and inventory of 74ABT126D,602 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT126D,602 is usually 5 days.
3.What payment methods are accepted for 74ABT126D,602?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ABT126D,602 transactions.
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4.How is shipping managed for 74ABT126D,602?
74ABT126D,602 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABT126D,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 74ABT126D,602?
For technical support, including 74ABT126D,602 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT126D,602 requirements.
6.How does Aetrix verify that 74ABT126D,602 is sourced from the original manufacturer or authorized distributors?
All 74ABT126D,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 74ABT126D,602 meets industry standards.
7.What is the process for return or replacement of 74ABT126D,602?
All 74ABT126D,602 units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT126D,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 74ABT126D,602 part is unused and in its original packaging.
Return procedure for 74ABT126D,602:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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