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NXP Semiconductors 74AHC126D,112
- Part No.:
- 74AHC126D,112
- Manufacturer:
- NXP Semiconductors
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74AHC126D,112.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:21,073
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Product details
Overview
74AHC126D,112 from Nexperia is a quad CMOS buffer/line driver with 3-state outputs, designed for bidirectional bus interfacing and level translation in mixed-voltage systems. It features overvoltage-tolerant inputs (up to 7.0 V), Schmitt-trigger input action, and operates across 2.0–5.5 V supply range. Typical propagation delay is 3.3 ns at VCC = 5.0 V with 15 pF load - enabling high-speed data routing in industrial control backplanes and FPGA I/O expansion.
For engineers reviewing the 74AHC126D,112 datasheet, 74AHC126D,112 pinout, 74AHC126D,112 application, or 74AHC126D,112 equivalent, key selection criteria include 3-state enable timing (tdis ≤ 9.5 ns), input overvoltage tolerance, rail-to-rail output swing, and SO14 package compatibility with legacy PCB footprints.
Technical Context
This device implements four independent non-inverting buffers, each with an active-HIGH output enable (nOE) controlling high-impedance tri-state output behavior. Input overvoltage tolerance enables use as a level translator between 3.3 V logic domains and 5 V or higher signal sources without external clamping.
All inputs incorporate Schmitt-trigger action for noise immunity on slow or noisy signals, and static characteristics are specified across –40 °C to +125 °C with VIH = 3.85 V (min) and VIL = 1.65 V (max) at VCC = 5.5 V - ensuring robust TTL- and CMOS-compatible switching thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0 V to 5.5 V - supports dual-rail operation in mixed-voltage systems (e.g., 3.3 V core / 5 V peripheral interfaces) |
| Propagation Delay (tpd) | 3.3 ns (typ) at VCC = 5.0 V, CL = 15 pF - enables >100 MHz data throughput in point-to-point routing |
| Output Enable Time (ten) | 3.6 ns (typ) at VCC = 5.0 V, CL = 15 pF - ensures fast bus arbitration and low-latency peripheral access |
| Input Overvoltage Tolerance | Up to 7.0 V - allows direct connection to 5 V or 3.3 V signals even when VCC = 2.0 V, eliminating level-shifter ICs |
| ESD Protection | HBM > 2000 V, CDM > 1000 V - meets industrial-grade reliability requirements without external protection diodes |
| Operating Temperature | –40 °C to +125 °C - qualified for under-hood automotive modules, motor drives, and industrial PLC I/O cards |
| Static Drive Strength | ±8 mA at VOH/VOL - sufficient to drive 50 Ω transmission lines or fan-out to ≥10 74AHC loads |
Pinout & Package
74AHC126D,112 is supplied in SO14 (SOT108-1) plastic small outline package: 14-pin, 3.9 mm body width, 1.27 mm lead pitch, gull-wing leads. Pin 1 marked by notch or bevel; thermal pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | nOE (1–4) | Active-HIGH output enable inputs - each controls one buffer's 3-state output independently |
| 2, 5, 9, 12 | nA (1–4) | Data inputs - Schmitt-triggered, overvoltage tolerant up to 7.0 V regardless of VCC |
| 3, 6, 8, 11 | nY (1–4) | Buffered non-inverting outputs - fully rail-to-rail, capable of sourcing/sinking ±8 mA |
| 7 | GND | Ground reference (0 V) - must be connected to system ground plane for noise immunity and ESD path |
| 14 | VCC | Positive supply - decoupling capacitor (100 nF ceramic) required within 5 mm of this pin |
Key Features
| Feature | Design Value |
|---|---|
| Balanced propagation delays | tpLH and tpHL match within 0.3 ns - minimizes skew in parallel data paths and clock distribution networks |
| Schmitt-trigger inputs | Hysteresis ≈ 0.3 V at VCC = 5 V - rejects noise spikes < 15 ns and stabilizes slow-rising signals (e.g., reset lines, sensor outputs) |
| Overvoltage-tolerant inputs | VI absolute max = +7.0 V - enables safe interface to 5 V microcontrollers while powered from 3.3 V rails |
| Wide temperature range | Specified from –40 °C to +125 °C - eliminates derating calculations for industrial motor control and power supply monitoring |
| Low quiescent current | ICC ≤ 40 μA at VCC = 5.5 V - reduces standby power in battery-backed I/O expanders and remote sensors |
Applications
| Industrial Backplane Interface | FPGA I/O Expansion |
|---|---|
|
Use Scenario: Isolating and buffering address/data lines between a microcontroller and modular I/O cards in a DIN-rail PLC chassis. IC Role / Device Role / Timing Role: Quad buffer provides direction-controlled signal conditioning and bus contention prevention via per-channel 3-state enables. Use Value: Enables hot-swap-safe bus arbitration with <9.5 ns disable time, preventing glitches during card insertion/removal. |
Use Scenario: Extending FPGA GPIO count to drive multiple SPI peripherals and status LEDs in edge AI gateways. IC Role / Device Role / Timing Role: Level-translating buffer translates 1.8 V FPGA outputs to 3.3 V peripheral logic while maintaining timing integrity. Use Value: Overvoltage-tolerant inputs accept 3.3 V feedback signals without clamping, simplifying bidirectional SPI MISO routing. |
| Automotive Body Control Module | Test Equipment Signal Conditioning |
|
Use Scenario: Driving LIN transceiver enable pins and dashboard LED drivers from a 3.3 V MCU in a vehicle body controller. IC Role / Device Role / Timing Role: Non-inverting buffer with Schmitt-trigger inputs cleans noisy switch inputs before MCU sampling. Use Value: –40 °C to +125 °C rating and 2000 V HBM ESD withstand eliminate need for external transient protection in under-dash environments. |
Use Scenario: Conditioning TTL/CMOS test patterns from pattern generators before injection into DUTs with varying logic thresholds. IC Role / Device Role / Timing Role: Programmable 3-state output isolates generator outputs during DUT reconfiguration cycles. Use Value: 3.3 ns propagation delay preserves sub-10 ns pulse fidelity, critical for validating high-speed digital ASIC timing margins. |
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 |
|---|---|---|---|
| 74AHCT126D,112 | TTL-compatible input thresholds (VIH = 2.0 V min); otherwise identical pinout, timing, and packaging | Better suited for interfacing with legacy 5 V TTL logic families where AHC's higher VIH may cause marginal switching | Select when driving from standard 5 V TTL outputs or when operating exclusively at VCC = 5.0 V |
| SN74LVC126APW | Lower VCC range (1.65–3.6 V); LVTTL input levels; TSSOP14 only; 3.7 ns tpd at 3.3 V | Optimized for 3.3 V-only systems; lacks overvoltage tolerance - requires external clamping for 5 V signal ingress | Choose for cost-sensitive, single-supply 3.3 V designs where voltage translation is unnecessary |
Compared with 74AHCT126D,112, the AHC variant offers superior noise immunity and wider input voltage margin; versus SN74LVC126APW, it trades lower supply flexibility for robust mixed-voltage interoperability and extended temperature capability.
Availability
74AHC126D,112 is available at Aetrix Electronics and suitable for industrial automation backplanes, FPGA-based edge computing modules, and automotive body control units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74AHC126D,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 focused on essential efficiency technologies, delivering high-performance logic, analog, and discrete components with industry-leading quality and reliability.
The 74AHC series targets high-speed, low-power CMOS logic applications requiring rail-to-rail operation, wide supply range, and robust noise immunity - especially in industrial, automotive, and communications infrastructure.
FAQ
Can 74AHC126D,112 safely interface a 5 V sensor output to a 3.3 V microcontroller?
Yes. Its inputs tolerate up to 7.0 V regardless of VCC, allowing direct connection of 5 V signals to the 74AHC126D,112 while powered from 3.3 V. The buffered output swings rail-to-rail (0 V to 3.3 V), matching the MCU's input thresholds without external resistors or level shifters.
What is the maximum capacitive load this device can drive while maintaining 3.3 ns propagation delay?
The 3.3 ns typical propagation delay is specified at CL = 15 pF. At CL = 50 pF, tpd increases to 4.7 ns (VCC = 4.5–5.5 V). For loads exceeding 50 pF, signal integrity degrades due to increased rise/fall times; external series termination or buffer staging is recommended.
Does the SO14 package (SOT108-1) require thermal pad soldering or grounding?
No. The SO14 package has no thermal pad. It uses gull-wing leads only. Thermal performance relies on copper pour under the package body and short traces to ground/power planes. No special thermal land or solder paste is needed beyond standard SMT reflow profiles.
How does the Schmitt-trigger input improve reliability in noisy industrial environments?
Schmitt-trigger inputs provide ~0.3 V hysteresis at VCC = 5 V, rejecting noise spikes shorter than 15 ns and stabilizing slow-rising signals (e.g., mechanical switch bounce or thermistor outputs). This eliminates false triggering and reduces firmware debouncing overhead in PLC and motor control applications.
74AHC126D,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74AHC
- Package/Case:
- 14-SOIC (0.154", 3.90mm 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:
- 8mA, 8mA
- Voltage - Supply:
- 2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
74AHC126D,112 FAQ
1.How can I place an order for 74AHC126D,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHC126D,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 74AHC126D,112 reliable?
The price and inventory of 74AHC126D,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHC126D,112 is usually 5 days.
3.What payment methods are accepted for 74AHC126D,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHC126D,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AHC126D,112?
74AHC126D,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHC126D,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 74AHC126D,112?
For technical support, including 74AHC126D,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHC126D,112 requirements.
6.How does Aetrix verify that 74AHC126D,112 is sourced from the original manufacturer or authorized distributors?
All 74AHC126D,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 74AHC126D,112 meets industry standards.
7.What is the process for return or replacement of 74AHC126D,112?
All 74AHC126D,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHC126D,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 74AHC126D,112 part is unused and in its original packaging.
Return procedure for 74AHC126D,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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