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Texas Instruments 74AHC1G126DCKTG4

Name: 74AHC1G126DCKTG4
Brand: Texas Instruments
SKU: 74AHC1G126DCKTG4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74AHC1G126DCKTG4

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 5-TSSOP, SC-70-5, SOT-353

Datasheet:: 74AHC1G126DCKTG4.pdf

Description:: IC BUF NON-INVERT 5.5V SC70-5

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Product details

Overview

74AHC1G126DCKTG4 from Texas Instruments is a single 3-state bus buffer gate operating from 2 V to 5.5 V, delivering 6 ns max propagation delay at 5 V, ±8 mA output drive, and 10 µA max supply current. It functions as a unidirectional level-translating line driver in compact SC-70-5 packages for space-constrained digital interface applications such as projector control buses and medical patient monitoring data paths.

For engineers reviewing the 74AHC1G126DCKTG4 datasheet, 74AHC1G126DCKTG4 pinout, 74AHC1G126DCKTG4 application, or 74AHC1G126DCKTG4 equivalent, this page delivers verified package mapping (SC-70, 5-pin), confirmed 3-state functional behavior, validated input voltage tolerance up to 5.5 V, and real-world timing performance across –40°C to +125°C.

Technical Context

The 74AHC1G126DCKTG4 implements a noninverting CMOS buffer with active-high 3-state output control. Its OE input directly enables/disables the Y output without inversion, supporting true data pass-through when asserted high and high-impedance isolation when low.

It features 5.5-V-tolerant inputs across all valid V_CC (2–5.5 V), enabling down-translation from higher-voltage logic domains into lower-V_CC systems. Output drive strength is balanced at ±8 mA at 5 V, with guaranteed switching performance under 15 pF and 50 pF loads.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	2 V to 5.5 V - supports mixed-voltage system interfacing and battery-powered operation down to 2 V
Max t_pd	6 ns at 5 V, CL = 15 pF - ensures sub-10 ns signal routing for high-speed digital control paths
I_OH/I_OL	±8 mA at 5 V - sufficient to drive multiple standard CMOS inputs or small LED indicators
I_CC Max	10 µA - enables ultra-low static power consumption in always-on monitoring subsystems
Input Voltage Tolerance	Up to 5.5 V regardless of V_CC - allows safe interfacing with 5-V logic while powered from 3.3 V or 2.5 V rails
Operating Temperature	–40°C to +125°C - qualified for industrial and automotive-adjacent embedded environments
ESD Rating	±1500 V HBM - meets standard handling requirements for automated assembly and field service

Pinout & Package

74AHC1G126DCKTG4 uses the SC-70 (DCK) 5-pin surface-mount package, measuring 2.0 mm × 2.1 mm with a body size of 2.0 mm × 1.25 mm. The package is RoHS-compliant, lead-finished with NiPdAu, and rated MSL Level-1 (260°C peak reflow).

Pin/Terminal	Circuit Role	Design Meaning
1 - OE	Active-high output enable	Drives Y into high-impedance state when low; ties to GND via pulldown resistor for power-up safety
2 - A	Noninverting data input	Accepts 5.5-V-tolerant signals independent of V_CC; no level-shifting circuitry required
3 - GND	Ground reference	Return path for all internal logic and output currents; must be low-impedance for noise immunity
4 - Y	3-state buffered output	Delivers true A-input signal when OE is high; presents >10 MΩ impedance when disabled
5 - V_CC	Power supply	Supplies core logic and output drivers; requires local 0.1 µF bypass capacitor per TI layout guidelines

Key Features

Feature	Design Value
Wide V_CC range (2–5.5 V)	Enables direct integration into 2.5 V, 3.3 V, and 5 V logic domains without external regulators
5.5-V-tolerant inputs	Eliminates need for discrete level shifters when connecting legacy 5-V peripherals to modern low-voltage controllers
Low ICC (≤10 µA)	Reduces quiescent power draw in battery-backed or energy-harvesting systems where standby current matters
Balanced ±8 mA drive	Supports clean signal integrity on stubbed or lightly loaded PCB traces without excessive ringing
Guaranteed 3-state isolation	Prevents bus contention in shared-data-path architectures like display interface backplanes or sensor multiplexers

Applications

Projector Control Bus	Medical Patient Monitor
Use Scenario: Isolating microcontroller GPIO lines driving lamp enable, fan speed, and lens position signals in portable DLP projectors. IC Role / Device Role / Timing Role: Unidirectional 3-state buffer providing controlled signal gating between MCU and peripheral drivers. Use Value: Prevents back-driving during power sequencing and reduces EMI by limiting output slew rate and drive strength.	Use Scenario: Interfacing low-power ARM Cortex-M4 ADC interface logic with 5-V analog front-end modules in bedside monitors. IC Role / Device Role / Timing Role: Voltage-level translating buffer enabling safe communication across mixed-supply subsystems. Use Value: Eliminates need for dual-supply level translators while maintaining <10 ns timing margin for real-time waveform sampling.
Industrial Server Management	Retail Point-of-Sale Terminal
Use Scenario: Buffering I²C or SMBus signals between baseboard management controller (BMC) and hot-swap power modules in 1U rack servers. IC Role / Device Role / Timing Role: Bidirectional-capable (with external pull-ups) 3-state isolator for shared serial bus arbitration. Use Value: Ensures glitch-free bus release during firmware updates and prevents latch-up during module insertion/removal.	Use Scenario: Driving status LEDs and relay control lines from a 3.3-V SoC in compact countertop POS terminals with legacy 5-V peripherals. IC Role / Device Role / Timing Role: Low-power, space-efficient output expander for GPIO-constrained application processors. Use Value: Delivers 8-mA drive in 2.0 mm × 2.1 mm footprint-reducing board area versus SOIC-8 alternatives by >75%.

Projector Control Bus

Medical Patient Monitor

Use Scenario: Isolating microcontroller GPIO lines driving lamp enable, fan speed, and lens position signals in portable DLP projectors.

IC Role / Device Role / Timing Role: Unidirectional 3-state buffer providing controlled signal gating between MCU and peripheral drivers.

Use Value: Prevents back-driving during power sequencing and reduces EMI by limiting output slew rate and drive strength.

Use Scenario: Interfacing low-power ARM Cortex-M4 ADC interface logic with 5-V analog front-end modules in bedside monitors.

IC Role / Device Role / Timing Role: Voltage-level translating buffer enabling safe communication across mixed-supply subsystems.

Use Value: Eliminates need for dual-supply level translators while maintaining <10 ns timing margin for real-time waveform sampling.

Industrial Server Management

Retail Point-of-Sale Terminal

Use Scenario: Buffering I²C or SMBus signals between baseboard management controller (BMC) and hot-swap power modules in 1U rack servers.

IC Role / Device Role / Timing Role: Bidirectional-capable (with external pull-ups) 3-state isolator for shared serial bus arbitration.

Use Value: Ensures glitch-free bus release during firmware updates and prevents latch-up during module insertion/removal.

Use Scenario: Driving status LEDs and relay control lines from a 3.3-V SoC in compact countertop POS terminals with legacy 5-V peripherals.

IC Role / Device Role / Timing Role: Low-power, space-efficient output expander for GPIO-constrained application processors.

Use Value: Delivers 8-mA drive in 2.0 mm × 2.1 mm footprint-reducing board area versus SOIC-8 alternatives by >75%.

Equivalent & Alternatives

The following parts are listed as comparable options for similar bus buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC1G126DBVR	Lower V_CC range (1.65–5.5 V); 3.5 ns max t_pd at 3.3 V; ±24 mA drive	Better suited for high-speed 3.3-V-only systems requiring stronger drive and faster edges	Select when timing budget is tighter and load capacitance exceeds 50 pF
74AUP1G126GW,125	NXP part; V_CC = 0.8–3.6 V; 12 ns max t_pd at 3.3 V; ±4 mA drive; 0.9-µA ICC	Optimized for ultra-low-power 1.8-V/2.5-V IoT edge nodes with relaxed speed requirements	Select when operating below 2 V or sub-1-µA standby is mandatory

Compared with SN74LVC1G126DBVR and 74AUP1G126GW,125, the 74AHC1G126DCKTG4 uniquely balances 2–5.5 V flexibility, 6 ns speed, and 10 µA ICC-making it optimal for mixed-rail industrial interfaces where voltage adaptability outweighs extreme speed or ultra-low power.

Availability

74AHC1G126DCKTG4 is available at Aetrix Electronics and suitable for projector control buses, medical patient monitoring subsystems, and industrial server management requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74AHC1G126DCKTG4 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.

The SN74AHC1G126 product line delivers single-gate 3-state buffers optimized for voltage translation, bus isolation, and low-power digital interfacing in space-constrained embedded systems.

FAQ

What is the maximum operating voltage for the 74AHC1G126DCKTG4?

The 74AHC1G126DCKTG4 supports a supply voltage range of 2 V to 5.5 V. Its inputs tolerate up to 5.5 V regardless of V_CC, enabling robust interfacing with higher-voltage logic families. Absolute maximum V_CC is 7 V, but sustained operation above 5.5 V violates recommended conditions and risks reliability degradation.

Does the 74AHC1G126DCKTG4 support level translation?

Yes-the 74AHC1G126DCKTG4 supports down-translation: its inputs accept voltages up to 5.5 V while operating from any V_CC between 2 V and 5.5 V. This allows connection of 5-V sensors or legacy peripherals to 3.3-V or 2.5-V microcontrollers without external level shifters.

What is the thermal resistance (RθJA) of the 74AHC1G126DCKTG4 in its SC-70 package?

The 74AHC1G126DCKTG4 in the SC-70 (DCK) package has a junction-to-ambient thermal resistance (RθJA) of 289.2 °C/W under standard JEDEC test conditions. This value assumes a 1-in² 2-oz copper pad with two vias; actual board layout significantly impacts real-world thermal performance.

Can the 74AHC1G126DCKTG4 drive multiple CMOS inputs reliably?

Yes-the 74AHC1G126DCKTG4 provides ±8 mA output drive at 5 V, sufficient to drive ≥10 standard 74AHC inputs (each ~1 µA leakage) or ≥4 74LVC inputs (each ~2 µA). For heavier capacitive loads (>50 pF), consult switching characteristics tables for guaranteed t_PLH/t_PHL limits.

Is the 74AHC1G126DCKTG4 pin-compatible with other SC-70 5-pin logic gates?

No-pin compatibility is function-specific. While the 74AHC1G126DCKTG4 shares the SC-70-5 footprint with devices like SN74AHC1G00 or SN74AHC1G14, its pinout (OE/A/GND/Y/V_CC) differs. Substituting requires schematic and layout verification; direct replacement is not assured without cross-referencing functional pin assignments.

74AHC1G126DCKTG4 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74AHC

Package/Case:: 5-TSSOP, SC-70-5, SOT-353

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

Logic Type:: Buffer, Non-Inverting

Number of Elements:: 1

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:: SC-70-5

74AHC1G126DCKTG4 FAQ

1.How can I place an order for 74AHC1G126DCKTG4 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74AHC1G126DCKTG4 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 74AHC1G126DCKTG4 reliable?

The price and inventory of 74AHC1G126DCKTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHC1G126DCKTG4 is usually 5 days.

3.What payment methods are accepted for 74AHC1G126DCKTG4?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHC1G126DCKTG4 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74AHC1G126DCKTG4?

74AHC1G126DCKTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74AHC1G126DCKTG4 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 74AHC1G126DCKTG4?

For technical support, including 74AHC1G126DCKTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHC1G126DCKTG4 requirements.

6.How does Aetrix verify that 74AHC1G126DCKTG4 is sourced from the original manufacturer or authorized distributors?

All 74AHC1G126DCKTG4 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 74AHC1G126DCKTG4 meets industry standards.

7.What is the process for return or replacement of 74AHC1G126DCKTG4?

All 74AHC1G126DCKTG4 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHC1G126DCKTG4, 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 74AHC1G126DCKTG4 part is unused and in its original packaging.

Return procedure for 74AHC1G126DCKTG4:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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