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Nexperia USA Inc. 74AHCT1G126GW,125
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- Part No.:
- 74AHCT1G126GW,125
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
74AHCT1G126GW,125.pdf
- Description:
- IC BUF NON-INVERT 5.5V 5TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:14,251
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Product details
Overview
74AHCT1G126GW,125 from Nexperia is a single 3-state bus buffer/line driver with TTL-compatible input thresholds, 2.0–5.5 V supply range, overvoltage-tolerant inputs (up to 5.5 V), and operation from –40 °C to +125 °C. It functions as a level-translating unidirectional driver in mixed-voltage digital interfaces such as microcontroller I/O expansion and FPGA peripheral buffering.
For engineers reviewing the 74AHCT1G126GW,125 datasheet, 74AHCT1G126GW,125 pinout, 74AHCT1G126GW,125 application, or 74AHCT1G126GW,125 equivalent, this device is selected for low-power, high-noise-immunity signal buffering where TTL-level compatibility and 3-state control are required in space-constrained industrial and automotive-adjacent systems.
Technical Context
This device implements a single-channel non-inverting buffer with active-low 3-state output enable (OE). Its TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V) ensure reliable interfacing with legacy 5 V logic families while operating from modern 3.3 V supplies. The overvoltage-tolerant inputs allow safe connection to higher-voltage buses without external clamping.
Propagation delay is specified at 3.4–7.5 ns (VCC = 4.5–5.5 V, CL = 15–50 pF), with enable/disable times under 9.5 ns. Output drive strength is ±8 mA at VCC = 4.5 V, supporting standard CMOS/TTL loads while maintaining symmetrical rise/fall times and balanced propagation delays across temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4.5 V to 5.5 V - Enables direct integration into 5 V logic systems without level shifters. |
| Input Thresholds | VIH ≥ 2.0 V, VIL ≤ 0.8 V - Guarantees TTL-level compatibility for robust noise margin in legacy 5 V environments. |
| Output Drive | ±8 mA at VCC = 4.5 V - Sufficient to drive 10 LSTTL loads or 15 pF + 1 kΩ loads per JEDEC standards. |
| Propagation Delay | 3.4 ns (typ, CL = 15 pF, VCC = 5 V) - Supports >100 MHz data rates in short-bus applications. |
| Operating Temperature | –40 °C to +125 °C - Qualified for under-hood, industrial control, and extended-temperature embedded use. |
| ESD Protection | HBM > 2000 V, CDM > 1000 V - Reduces risk of field failure during handling and PCB assembly. |
| Power Dissipation | ICC ≤ 40 μA (max, –40 °C to +125 °C) - Enables ultra-low static power in always-on monitoring circuits. |
Pinout & Package
TSSOP5 (SOT353-1) package: plastic thin shrink small outline, 5-lead, 1.25 mm body width, 0.65 mm pitch, exposed pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Output Enable (active-low) | Asserting low enables Y = A; high forces Y into high-impedance state - essential for bus arbitration and shared-line contention control. |
| 2 (A) | Data Input | Non-inverting input accepting TTL-level signals up to 5.5 V regardless of VCC - enables mixed-voltage domain bridging. |
| 3 (GND) | Ground Reference | 0 V return path for all internal logic and output current - must be low-impedance to maintain noise immunity and timing integrity. |
| 4 (Y) | 3-State Output | Buffered, non-inverting output capable of driving CMOS/TTL loads or entering high-Z - supports multi-drop bus topologies. |
| 5 (VCC) | Supply Voltage | Primary power rail (4.5–5.5 V); powers internal logic and output stage - decoupling capacitor required within 1 cm. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-Compatible Inputs | VIH ≥ 2.0 V, VIL ≤ 0.8 V at 5 V supply - eliminates need for external level-shifting when interfacing with legacy 5 V controllers. |
| Overvoltage-Tolerant Inputs | Withstands up to 5.5 V on A and OE pins independent of VCC - prevents damage during hot-plug or voltage-rail sequencing events. |
| Symmetrical Output Impedance | Matched pull-up/pull-down resistance ensures equal rise/fall times (<10% skew) - critical for clean signal integrity in high-speed digital links. |
| Wide Temperature Range | Specified from –40 °C to +125 °C - supports deployment in engine control units, motor drives, and outdoor industrial gateways. |
| Low Dynamic Power | CPD = 11 pF - minimizes switching power (PD = CPD × VCC² × f) in battery-backed or thermally constrained applications. |
Applications
| Microcontroller I/O Expansion | FPGA Peripheral Interface |
|---|---|
|
Use Scenario: Expanding GPIO count of an ARM Cortex-M0+ MCU by connecting parallel peripherals (ADCs, DACs, sensors) via shared address/data bus. IC Role / Device Role / Timing Role: Unidirectional 3-state buffer isolating MCU pins from bus loading; OE controlled by address decoder to enable only one peripheral at a time. Use Value: Prevents bus contention during read/write cycles and reduces MCU pin drive burden - enabling reliable 10 MHz burst transfers without timing violations. |
Use Scenario: Interfacing a Xilinx Artix-7 FPGA's bank-1 I/O (3.3 V) to legacy 5 V industrial sensors and actuators. IC Role / Device Role / Timing Role: Level-translating buffer with TTL input thresholds, allowing FPGA to drive and sample 5 V signals safely using its 3.3 V I/O banks. Use Value: Eliminates need for discrete resistor dividers or dedicated level translators - saving PCB area and reducing BOM count in compact PLC modules. |
| Automotive Body Control Module | Industrial Serial Bus Isolation |
|
Use Scenario: Buffering LIN bus transceiver outputs to multiple local microcontrollers in a door module, where ESD robustness and wide temperature range are mandatory. IC Role / Device Role / Timing Role: Signal repeater with HBM > 2000 V ESD rating and –40 °C to +125 °C operation - placed between LIN PHY and MCU GPIOs. Use Value: Ensures signal integrity across long traces inside metal enclosures while surviving automotive load-dump and cold-crank conditions. |
Use Scenario: Isolating RS-485 transceiver data lines from host MCU in a factory automation gateway, preventing ground loop noise coupling. IC Role / Device Role / Timing Role: 3-state buffer inserted between UART TX/RX and transceiver, controlled by direction pin to enforce half-duplex timing discipline. Use Value: Enforces strict driver enable/disable sequencing - eliminating bus collisions and ensuring compliant RS-485 timing margins at 115.2 kbps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74AHCT1G125GW,125 | Inverting buffer (Y = NOT A); identical pinout, specs, and package. | Required where signal polarity inversion is needed in bus control logic (e.g., active-high enable generation). | Select only if functional inversion is explicitly required - otherwise, 74AHCT1G126GW,125 provides correct non-inverting behavior. |
| SN74LVC1G126DBVR | CMOS-input version (VIH = 0.7×VCC); lower VCC range (1.65–5.5 V); same 3-state function. | Better suited for mixed 1.8 V/3.3 V systems; lacks TTL threshold guarantee for 5 V legacy interface reliability. | Prefer for new low-voltage designs; avoid when interfacing with 5 V TTL sources where VIH ≥ 2.0 V is mandatory. |
Compared with 74AHCT1G125GW,125, this part avoids unintended signal inversion; compared with SN74LVC1G126DBVR, it guarantees robust 5 V TTL compatibility - making it the optimal choice for industrial and automotive-adjacent 5 V bus buffering where input threshold certainty is critical.
Availability
74AHCT1G126GW,125 is available at Aetrix Electronics and suitable for microcontroller I/O expansion, FPGA peripheral interfacing, automotive body control modules, and industrial serial bus isolation requiring stable component supply across extended temperature and mixed-voltage environments.
Supply support for 74AHCT1G126GW,125 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, analog, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in industrial, automotive, and consumer applications.
This device belongs to Nexperia's 74AHCT advanced high-speed CMOS logic family, engineered specifically for robust 5 V TTL-compatible interfacing in space- and power-constrained embedded systems.
FAQ
Can 74AHCT1G126GW,125 operate with a 3.3 V supply?
No - the 74AHCT variant is specified only for 4.5 V to 5.5 V supply. For 3.3 V operation, use the 74AHC1G126GW,125 (CMOS-input version) or 74LVC1G126 variants. Attempting 3.3 V operation on this part results in undefined input thresholds and potential functional failure due to insufficient VIH margin.
What is the maximum capacitive load this buffer can drive reliably?
It 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 setup/hold violations; for heavier loads, add series termination or use a higher-drive buffer like 74AHCT244.
Is the GND pin (pin 3) internally connected to the substrate or thermal pad?
No - the TSSOP5 (SOT353-1) package has no thermal pad or exposed die attach. Pin 3 is the sole GND terminal for electrical reference and return current; thermal dissipation relies on PCB copper area connected to this pin via minimum 0.3 mm trace width and thermal vias.
Does the overvoltage tolerance apply to the OE pin as well as A?
Yes - both A (pin 2) and OE (pin 1) are overvoltage tolerant to 5.5 V regardless of VCC level. This allows OE to be driven directly from a 5 V controller even when VCC = 4.5 V, simplifying power-domain partitioning in multi-rail systems.
74AHCT1G126GW,125 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74AHCT
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-TSSOP
74AHCT1G126GW,125 FAQ
1.How can I place an order for 74AHCT1G126GW,125 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHCT1G126GW,125 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 74AHCT1G126GW,125 reliable?
The price and inventory of 74AHCT1G126GW,125 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHCT1G126GW,125 is usually 5 days.
3.What payment methods are accepted for 74AHCT1G126GW,125?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHCT1G126GW,125 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AHCT1G126GW,125?
74AHCT1G126GW,125 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHCT1G126GW,125 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 74AHCT1G126GW,125?
For technical support, including 74AHCT1G126GW,125 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHCT1G126GW,125 requirements.
6.How does Aetrix verify that 74AHCT1G126GW,125 is sourced from the original manufacturer or authorized distributors?
All 74AHCT1G126GW,125 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 74AHCT1G126GW,125 meets industry standards.
7.What is the process for return or replacement of 74AHCT1G126GW,125?
All 74AHCT1G126GW,125 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHCT1G126GW,125, 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 74AHCT1G126GW,125 part is unused and in its original packaging.
Return procedure for 74AHCT1G126GW,125:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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