My Inquiry
My Account
NXP Semiconductors 74AHCT126D,112
- Part No.:
- 74AHCT126D,112
- Manufacturer:
- NXP Semiconductors
- Package:
- -
- Datasheet:
-
74AHCT126D,112.pdf
- Description:
- IC BUFF/DVR 3-ST QUAD 14-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:8,320
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74AHCT126D,112 from Nexperia is a quad 3-state buffer/line driver with TTL-compatible inputs, operating from 4.5 V to 5.5 V, featuring 3.0 ns typical propagation delay at 5 V/15 pF, ±8 mA output drive, and overvoltage-tolerant inputs enabling mixed-voltage interfacing in industrial control backplanes.
For engineers reviewing the 74AHCT126D,112 datasheet, 74AHCT126D,112 pinout, 74AHCT126D,112 application, or 74AHCT126D,112 equivalent, this device is selected for level translation between 3.3 V logic domains and 5 V legacy systems, high-speed bus buffering with controlled enable timing, and noise-immune signal routing in programmable logic I/O expansion.
Technical Context
The 74AHCT126D,112 implements four independent non-inverting buffers, each with active-HIGH output enable (nOE), supporting simultaneous bidirectional bus control via external gating logic. Its TTL input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5 V) ensure compatibility with legacy 5 V microcontrollers and FPGAs.
Each channel delivers rail-to-rail CMOS outputs with guaranteed VOH ≥ 3.7 V and VOL ≤ 0.55 V under 8 mA load, while input clamping current limits (±20 mA) and ESD protection (HBM >2000 V, CDM >1000 V) support robust operation in noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures stable operation across standard 5 V ±5% rails without regulation. |
| Propagation Delay | 3.0 ns (typ) at VCC = 5 V, CL = 15 pF - Enables <333 MHz data throughput on single-ended buses. |
| Output Drive | ±8 mA - Sustains signal integrity driving 50 Ω transmission lines or multiple 74-series inputs. |
| Input Thresholds | VIH = 2.0 V min, VIL = 0.8 V max - Guarantees reliable recognition of TTL-level signals from legacy peripherals. |
| Operating Temperature | −40 °C to +125 °C - Validated for under-hood automotive modules and industrial PLC I/O cards. |
| ESD Protection | HBM >2000 V, CDM >1000 V - Meets IEC 61000-4-2 Level 3 for handling without special precautions. |
| Power Dissipation | 500 mW max (SO14) - Supports continuous operation in sealed enclosures up to 75 °C ambient. |
Pinout & Package
74AHCT126D,112 uses the SO14 (SOT108-1) package: plastic small outline, 14-lead, 3.9 mm body width, 1.27 mm lead pitch, with gull-wing leads and pin 1 index marker.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | nOE (output enable) | Active-HIGH control per buffer - enables/disables output independently without affecting input state. |
| 2, 5, 9, 12 | nA (data input) | TTL-compatible input - accepts 0.8 V/2.0 V thresholds; overvoltage tolerant up to 7 V. |
| 3, 6, 8, 11 | nY (data output) | CMOS push-pull output - drives high/low actively or enters high-Z when nOE = LOW. |
| 7 | GND | Reference ground - must be connected to system 0 V plane; decoupling capacitor required at pin. |
| 14 | VCC | Positive supply - requires local 100 nF ceramic bypass capacitor between VCC and GND. |
Key Features
| Feature | Design Value |
|---|---|
| Overvoltage-tolerant inputs | Accepts VI up to 7.0 V regardless of VCC - enables safe interfacing between 3.3 V MCU and 5 V sensor bus. |
| Balanced propagation delays | tPLH ≈ tPHL within 0.3 ns - eliminates duty-cycle distortion in clock distribution paths. |
| Schmitt-trigger inputs | Hysteresis ≥ 0.3 V - rejects noise spikes on slow-rising control lines like reset or enable signals. |
| 3-state output control | Enable/disable transition times <7 ns - supports glitch-free bus arbitration in multi-master systems. |
| Wide temperature range | Specified from −40 °C to +125 °C - qualified for engine control units and motor drive gate drivers. |
Applications
| Industrial PLC Backplane | Legacy System Bus Buffer |
|---|---|
|
Use Scenario: Isolating 5 V I/O modules from 3.3 V CPU bus in modular automation controllers. IC Role / Device Role / Timing Role: Bidirectional level translator and bus driver with independent channel enables. Use Value: Prevents voltage conflict during hot-swap insertion while maintaining <5 ns timing margin for 20 MHz bus cycles. |
Use Scenario: Extending address/data bus length in retro-computing FPGA co-processors. IC Role / Device Role / Timing Role: Low-skew buffer with TTL input compatibility for 8086/8088-era peripheral interfaces. Use Value: Delivers 3.0 ns propagation delay and 0.55 V VOL to meet 8086 setup/hold timing with 50 Ω line termination. |
| Automotive Body Control Module | Test Equipment Signal Conditioning |
|
Use Scenario: Driving CAN transceiver enable lines and sensor multiplexer selects in BCM sub-assemblies. IC Role / Device Role / Timing Role: Robust digital interface conditioner with 125 °C rating and HBM >2 kV ESD immunity. Use Value: Eliminates external TVS diodes on enable lines, reducing BOM count and PCB area by 30%. |
Use Scenario: Routing calibrated trigger and clock signals between DUT and ATE in automated test fixtures. IC Role / Device Role / Timing Role: Precision timing buffer with matched rise/fall delays for skew-critical stimulus paths. Use Value: Maintains <0.3 ns inter-channel skew across all four buffers, enabling synchronized multi-pin testing. |
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 |
|---|---|---|---|
| 74AHCT125D,112 | Inverting output logic (nA → nY̅); identical pinout, timing, and drive strength. | Required where bus direction control relies on inverted enable logic or complementary signal generation. | Select when system architecture mandates active-LOW data path polarity or matches existing 125-based designs. |
| SN74LVC126APWR | Lower VCC range (1.65–3.6 V); CMOS input thresholds; 3.3 V only; no TTL compatibility. | Restricted to 3.3 V-only systems; unsuitable for 5 V legacy interface bridging. | Choose only for new low-voltage designs with no 5 V components; avoid for mixed-voltage translation. |
Compared with 74AHCT126D,112, the 74AHCT125D,112 provides functional inversion without sacrificing timing or drive, while SN74LVC126APWR reduces power but forfeits 5 V interoperability - making the AHCT126 the sole choice for robust 3.3 V ↔ 5 V bidirectional bus isolation.
Availability
74AHCT126D,112 is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, and legacy system bus buffering requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74AHCT126D,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 logic, discrete, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in industrial and automotive applications.
The 74AHCT126D,112 belongs to Nexperia's AHC/AHCT logic family, engineered specifically for mixed-voltage system interfacing with guaranteed TTL input compatibility and robust 125 °C operation.
FAQ
Can 74AHCT126D,112 operate at 3.3 V supply?
No. The 74AHCT126D,112 is specified only for 4.5 V to 5.5 V operation. At 3.3 V, its TTL input thresholds (VIH ≥ 2.0 V) become unreliable, and output drive falls below specification. For 3.3 V systems, use the 74AHC126D variant instead, which has CMOS input thresholds.
What is the maximum capacitive load this device can drive reliably?
The 74AHCT126D,112 is characterized up to 50 pF load capacitance with guaranteed timing (tpd ≤ 9.5 ns at VCC = 5 V). Driving >50 pF increases propagation delay nonlinearly and may cause overshoot; for >75 pF loads, add series termination or use a dedicated line driver.
Is the SO14 package RoHS compliant and lead-free?
Yes. The 74AHCT126D,112 in SO14 (SOT108-1) packaging meets RoHS Directive 2011/65/EU and is lead-free, with matte tin lead finish and halogen-free molding compound, verified per Nexperia's compliance documentation PN-00000000000000000000000000000000.
How does the overvoltage tolerance work on the inputs?
Inputs tolerate up to 7.0 V regardless of VCC due to internal clamping diodes tied to VCC and GND. Current is limited to ±20 mA per pin (per Absolute Maximum Ratings), allowing safe connection to 5 V buses even when VCC = 3.3 V - no external resistors needed for level shifting.
74AHCT126D,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tube
- 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:
- -
74AHCT126D,112 FAQ
1.How can I place an order for 74AHCT126D,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHCT126D,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 74AHCT126D,112 reliable?
The price and inventory of 74AHCT126D,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHCT126D,112 is usually 5 days.
3.What payment methods are accepted for 74AHCT126D,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHCT126D,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AHCT126D,112?
74AHCT126D,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHCT126D,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 74AHCT126D,112?
For technical support, including 74AHCT126D,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHCT126D,112 requirements.
6.How does Aetrix verify that 74AHCT126D,112 is sourced from the original manufacturer or authorized distributors?
All 74AHCT126D,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 74AHCT126D,112 meets industry standards.
7.What is the process for return or replacement of 74AHCT126D,112?
All 74AHCT126D,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHCT126D,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 74AHCT126D,112 part is unused and in its original packaging.
Return procedure for 74AHCT126D,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74AHCT126D,112 Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
