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Nexperia USA Inc. 74AHCT1G126GV,125
- Part No.:
- 74AHCT1G126GV,125
- Manufacturer:
- Nexperia USA Inc.
- Package:
- SC-74A, SOT-753
- Datasheet:
-
74AHCT1G126GV,125.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V SC74A
- Quantity:
- Payment:
- Shipping:
Inventory:7,696
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Product details
Overview
74AHCT1G126GV,125 from Nexperia is a single 3-state bus buffer/line driver with TTL-compatible input thresholds, 5-pin SC-74A (SOT753) package, operating from 4.5 V to 5.5 V supply, −40 °C to +125 °C temperature range, and overvoltage-tolerant inputs up to 5.5 V - used for level translation and bidirectional bus control in industrial I/O expansion modules.
For engineers reviewing the 74AHCT1G126GV,125 datasheet, 74AHCT1G126GV,125 pinout, 74AHCT1G126GV,125 application, or 74AHCT1G126GV,125 equivalent, this device serves as a low-power, high-noise-immunity unidirectional buffer enabling voltage-level interoperability between 3.3 V logic domains and 5 V microcontroller buses while maintaining precise enable timing and rail-to-rail output drive capability.
Technical Context
The 74AHCT1G126GV,125 implements a single non-inverting buffer with active-low 3-state output control (OE), where output Y follows input A when OE is LOW and enters high-impedance state when OE is HIGH. Its TTL-level input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V) ensure compatibility with legacy 5 V TTL outputs while driving CMOS loads.
It features symmetrical output impedance (typ. 25 Ω), balanced propagation delays (tpd = 3.4–7.5 ns depending on VCC and load), and overvoltage-tolerant inputs that accept up to 5.5 V regardless of supply voltage - enabling safe interfacing across mixed-voltage systems without external clamping diodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - supports stable operation across standard 5 V ±10% rails with no under-voltage lockout. |
| Input Thresholds | VIH = 2.0 V min, VIL = 0.8 V max - ensures reliable recognition of TTL logic levels at full VCC range. |
| Propagation Delay | 3.4 ns (typ) at VCC = 5.0 V, CL = 15 pF - enables high-speed data buffering in sub-10 ns timing-critical paths. |
| Output Drive | ±8 mA at VCC = 4.5 V - sufficient to drive 50 Ω transmission lines or multiple 74-series inputs without fanout limitation. |
| Operating Temperature | −40 °C to +125 °C - qualified for under-hood automotive I/O, industrial PLC backplanes, and extended-temperature embedded controllers. |
| Input Overvoltage Tolerance | Up to 5.5 V - allows direct connection to 5 V signals even when VCC = 4.5 V, eliminating level-shifter components. |
| ESD Protection | HBM > 2000 V, CDM > 1000 V - meets industrial handling requirements without additional protection circuitry. |
Pinout & Package
SC-74A (SOT753) plastic surface-mounted package: 5-terminal, leadless edge-terminal configuration; body dimensions 2.9 mm × 1.3 mm × 1.0 mm; thermal resistance RθJA = 263 K/W; rated for reflow soldering per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Output Enable (active LOW) | Asserting LOW enables Y = A; HIGH forces Y into high-impedance - critical for bus arbitration and shared-line contention control. |
| 2 (A) | Data Input | TTL-compatible input accepting 0–5.5 V; internally clamped, no external pull-up required for open-drain sources. |
| 3 (GND) | Ground Reference | 0 V return path for all internal logic and output stages; must be low-inductance connection to minimize ground bounce. |
| 4 (Y) | 3-State Output | Non-inverting buffered output; drives HIGH/LOW or floats - used for isolated signal routing or multiplexed bus segments. |
| 5 (VCC) | Supply Voltage | Primary power rail (4.5–5.5 V); decoupling capacitor (100 nF ceramic) required within 5 mm for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Symmetrical output impedance | Typ. 25 Ω both HIGH and LOW - ensures matched rise/fall times and minimizes signal distortion on controlled-impedance traces. |
| Overvoltage-tolerant inputs | Rated to 5.5 V independent of VCC - enables direct interface to 5 V peripherals without level shifters in mixed-supply systems. |
| Wide temperature range | −40 °C to +125 °C operation - validated for use in engine control units, motor drives, and outdoor industrial gateways. |
| Low dynamic power dissipation | CPD = 11 pF - reduces switching current in high-frequency enable/disable cycling, e.g., in burst-mode sensor interfaces. |
| High noise immunity | ΔVNS = 0.4 V min (VCC = 5 V) - rejects EMI-induced glitches on OE and A pins in electrically noisy factory-floor environments. |
Applications
| Industrial PLC I/O Expansion | Automotive Body Control Module |
|---|---|
Use Scenario: Isolating microcontroller GPIO from high-current solenoid drivers and analog sensor ADCs on shared PCB backplane. IC Role / Device Role / Timing Role: Unidirectional buffer with 3-state control enables time-multiplexed access to common analog front-end resources without signal contention. Use Value: Overvoltage-tolerant inputs prevent latch-up when 5 V sensor outputs connect directly to 4.5 V-powered MCU I/O headers. |
Use Scenario: Interfacing 3.3 V CAN controller UART lines to 5 V diagnostic port transceivers in vehicle service tools. IC Role / Device Role / Timing Role: Level-translating buffer with sub-7 ns propagation delay preserves UART timing margins at 1 Mbps baud rate. Use Value: TTL input thresholds guarantee robust recognition of 3.3 V logic highs from CAN controller despite supply rail droop during cold-cranking. |
| Medical Patient Monitor Data Bus | Test Equipment Signal Routing |
Use Scenario: Multiplexing ECG, SpO₂, and NIBP sensor data streams onto a shared SPI daisy-chain in portable diagnostic devices. IC Role / Device Role / Timing Role: 3-state enable control synchronizes data flow from multiple sensors to avoid bus collisions during concurrent acquisition. Use Value: −40 °C to +125 °C rating supports operation inside sealed enclosures exposed to sterilization heat cycles and ambient temperature extremes. |
Use Scenario: Routing calibrated reference signals from precision DACs to multiple DUT input channels in automated test fixtures. IC Role / Device Role / Timing Role: Low-skew buffer isolates sensitive reference paths from switching noise generated by adjacent digital stimulus generators. Use Value: Symmetrical 25 Ω output impedance matches 50 Ω coaxial cabling, reducing reflections and preserving signal integrity at 100 MHz test frequencies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74AHCT1G125GV,125 | Inverting buffer (Y = NOT A); identical pinout, specs, and package | Required where signal polarity inversion is needed in bus arbitration logic | Select only if system design mandates inverted enable or data path behavior |
| SN74LVC1G126DBVR | CMOS input thresholds (VIH = 2.0 V @ VCC = 3.3 V), 1.65–5.5 V supply range, SOT-23-5 package | Better suited for 3.3 V–5 V bidirectional translation with lower static current (ICC = 10 μA max) | Prefer for mixed 3.3 V/5 V systems requiring tighter VIH/VIL margins and lower quiescent power |
Compared with 74AHCT1G125GV,125, this part avoids unintended signal inversion; compared with SN74LVC1G126DBVR, it provides guaranteed TTL compatibility at 5 V but lacks sub-3.3 V operation - making it optimal for legacy 5 V industrial control where input noise margin is prioritized over ultra-low power.
Availability
74AHCT1G126GV,125 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, medical patient monitor data buses, and test equipment signal routing requiring stable component supply across extended temperature and mixed-voltage environments.
Supply support for 74AHCT1G126GV,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, discrete, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in industrial, automotive, and consumer applications.
The 74AHCT series targets robust, pin-compatible replacements for legacy TTL logic in modern mixed-signal systems - emphasizing noise immunity, wide temperature operation, and seamless integration with both CMOS and bipolar logic families.
FAQ
Can 74AHCT1G126GV,125 operate with a 3.3 V supply?
No - the 74AHCT variant is specified only for 4.5 V to 5.5 V operation. Its TTL input thresholds require minimum 2.0 V VIH, which cannot be reliably met below 4.5 V supply. For 3.3 V systems, use the 74AHC1G126GV,125 (CMOS-input version) or SN74LVC1G126DBVR instead.
What is the maximum capacitive load this buffer can drive reliably?
Per datasheet dynamic characteristics, it maintains specified tpd and waveform fidelity up to 50 pF load capacitance at VCC = 4.5–5.5 V. Driving >50 pF may increase propagation delay beyond 9.5 ns and cause overshoot; for heavier loads, add series termination or use a higher-drive buffer like 74AHCT244.
Is the SC-74A (SOT753) package compatible with standard reflow profiles?
Yes - the SOT753 package is qualified for lead-free reflow per JEDEC J-STD-020, with peak temperature up to 260 °C for ≤30 seconds. Recommended profile includes ramp rate ≤3 °C/s, soak at 150–200 °C for 60–120 s, and time above liquidus (217 °C) of 60–90 s.
Does this device support hot insertion or live swapping?
No - the 74AHCT1G126GV,125 lacks powered-off protection or Ioff specification. Applying input signals while VCC = 0 V may forward-bias internal clamps and cause excessive current. Always power VCC before asserting OE or A, and sequence power-down with OE HIGH first.
74AHCT1G126GV,125 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74AHCT
- Package/Case:
- SC-74A, SOT-753
- 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:
- SC-74A
74AHCT1G126GV,125 FAQ
1.How can I place an order for 74AHCT1G126GV,125 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHCT1G126GV,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 74AHCT1G126GV,125 reliable?
The price and inventory of 74AHCT1G126GV,125 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHCT1G126GV,125 is usually 5 days.
3.What payment methods are accepted for 74AHCT1G126GV,125?
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4.How is shipping managed for 74AHCT1G126GV,125?
74AHCT1G126GV,125 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHCT1G126GV,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 74AHCT1G126GV,125?
For technical support, including 74AHCT1G126GV,125 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHCT1G126GV,125 requirements.
6.How does Aetrix verify that 74AHCT1G126GV,125 is sourced from the original manufacturer or authorized distributors?
All 74AHCT1G126GV,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 74AHCT1G126GV,125 meets industry standards.
7.What is the process for return or replacement of 74AHCT1G126GV,125?
All 74AHCT1G126GV,125 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHCT1G126GV,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 74AHCT1G126GV,125 part is unused and in its original packaging.
Return procedure for 74AHCT1G126GV,125:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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