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Nexperia USA Inc. 74HC1G126GV,125
- Part No.:
- 74HC1G126GV,125
- Manufacturer:
- Nexperia USA Inc.
- Package:
- SC-74A, SOT-753
- Datasheet:
-
74HC1G126GV,125.pdf
- Description:
- IC BUFFER NON-INVERT 6V SC74A
- Quantity:
- Payment:
- Shipping:
Inventory:3,517
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Product details
Overview
74HC1G126GV,125 from Nexperia is a single CMOS bus buffer/line driver with 3-state output, designed for bidirectional data path control in low-voltage logic systems. It operates from 2.0 V to 6.0 V, delivers symmetrical output impedance (typ. 25 Ω), supports -40 °C to +125 °C ambient range, and features TTL-compatible input thresholds only in the HCT variant - this part is HC-level (CMOS input). It is used in I²C bus level-shifting interfaces and microcontroller GPIO expansion circuits.
For engineers reviewing the 74HC1G126GV,125 datasheet, 74HC1G126GV,125 pinout, 74HC1G126GV,125 application, or 74HC1G126GV,125 equivalent, key selection criteria include 3-state enable timing (ten ≤ 30 ns @ VCC = 4.5 V), input clamp diode support for overvoltage-tolerant interfacing, static drive capability (±6 mA @ VCC = 4.5 V), and SC-74A (SOT753) package compatibility with high-density PCB layouts.
Technical Context
This device implements a non-inverting buffer with active-high 3-state enable (OE), where output Y follows input A when OE = HIGH and enters high-impedance state when OE = LOW. Its CMOS input structure provides rail-to-rail voltage recognition (VIH ≥ 3.15 V @ VCC = 4.5 V; VIL ≤ 1.35 V), enabling robust noise immunity (typ. 1.35 V noise margin at 4.5 V).
Propagation delay is tightly balanced (tpd = 10 ns typ. @ VCC = 4.5 V, CL = 50 pF), and enable/disable times are matched (ten = tdis ≈ 10–12 ns typ.), ensuring deterministic bus arbitration in shared-data-path applications. Input clamping diodes allow safe interface to signals up to VCC + 0.5 V when current-limited.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0 V to 6.0 V - supports mixed-voltage system interfacing (e.g., 3.3 V MCU to 5 V peripheral) |
| Output Drive Strength | ±6.0 mA @ VCC = 4.5 V - sufficient to drive 50 pF loads with <30 ns propagation delay |
| 3-State Enable Time (ten) | 10 ns typ. @ VCC = 4.5 V - enables fast bus turnaround in multi-master protocols |
| Input Clamp Diode Support | VI < −0.5 V or VI > VCC + 0.5 V - permits safe overvoltage input handling with external current-limiting resistors |
| Operating Temperature | −40 °C to +125 °C - qualified for extended industrial and under-hood automotive auxiliary circuits |
| Power Dissipation Capacitance | 30 pF - determines dynamic power consumption (PD = CPD × VCC² × fi) in high-frequency switching |
| ESD Robustness | HBM > 2000 V, CDM > 1000 V - reduces need for external ESD protection in board-level designs |
Pinout & Package
74HC1G126GV,125 is housed in SC-74A (SOT753), a 5-lead plastic surface-mounted package with 0.65 mm lead pitch, 1.3 mm body width, and exposed pad-less construction optimized for reflow assembly and thermal performance in space-constrained layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Output enable input | Active-HIGH control: drives Y = A when HIGH; places Y in high-Z when LOW |
| 2 (A) | Data input | CMOS-level input with clamp diodes - accepts voltages beyond VCC when current-limited |
| 3 (GND) | Ground reference | 0 V return path for all internal circuitry and output current sinking |
| 4 (Y) | Data output | Non-inverting buffered output with 3-state capability and symmetrical rise/fall drive |
| 5 (VCC) | Positive supply | Primary power rail; also defines logic threshold levels and output swing range |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input voltage recognition | VIH ≥ 3.15 V / VIL ≤ 1.35 V @ VCC = 4.5 V - ensures reliable logic interpretation across full supply range |
| Balanced propagation delays | tpd = tPLH = tPHL = 10 ns typ. - eliminates duty-cycle distortion in clocked data paths |
| Latch-up immunity | Exceeds 100 mA per JESD78 Class II Level B - prevents destructive latch-up during transient overvoltage events |
| Low dynamic power | CPD = 30 pF - limits switching power to <1.5 mW @ 1 MHz, 5 V (excluding load capacitance) |
| High-noise immunity | Typical noise margin = 1.35 V @ VCC = 4.5 V - suppresses false triggering from coupled digital noise |
Applications
| Industrial Sensor Interface | I²C Bus Level Translation |
|---|---|
|
Use Scenario: Isolating and buffering analog sensor ADC outputs before multiplexing into a shared microcontroller data bus. IC Role / Device Role / Timing Role: Unidirectional signal conditioning buffer with 3-state isolation to prevent bus contention during channel switching. Use Value: Enables clean signal routing without loading adjacent channels; ±6 mA drive supports 10 cm PCB traces with <30 ns skew. |
Use Scenario: Translating 3.3 V I²C signals from an MCU to 5 V peripherals while maintaining protocol timing compliance. IC Role / Device Role / Timing Role: Voltage-level agnostic bus buffer that preserves SCL/SDA edge rates and meets I²C rise-time requirements via controlled output impedance. Use Value: Eliminates need for discrete MOSFET translators; 10 ns propagation delay avoids violating I²C fast-mode timing budgets. |
| Microcontroller GPIO Expansion | Legacy Parallel Bus Isolation |
|
Use Scenario: Extending limited MCU GPIO count to drive multiple LED indicators or small-signal relays in compact embedded controllers. IC Role / Device Role / Timing Role: Single-bit output expander with 3-state disable, allowing shared control lines across multiple devices. Use Value: Reduces PCB footprint vs. larger buffers; SC-74A package fits 2.0 mm pitch layouts; low ICC (<20 μA) extends battery life. |
Use Scenario: Isolating legacy 5 V parallel address/data buses from modern 3.3 V FPGA I/O banks during system upgrades. IC Role / Device Role / Timing Role: Directionally transparent bus driver with OE-controlled tri-state, enabling clean bus release during FPGA reconfiguration. Use Value: Prevents back-driving damage; input clamp diodes tolerate 5 V inputs on 3.3 V rails when series-resistor limited to <1 mA. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HCT1G126GV,125 | TTL-compatible inputs (VIH = 2.0 V min @ VCC = 4.5 V); otherwise identical pinout, timing, and drive | Required when interfacing with legacy 5 V TTL logic families; not suitable for pure CMOS systems with weak pull-ups | Select when driving from 5 V TTL sources; avoid if system uses CMOS outputs with marginal high-level voltage |
| SN74LVC1G126DBVR | Lower VCC range (1.65–5.5 V); higher drive (±32 mA); different pinout (SOT-23-5); no input clamp diodes | Better suited for 1.8 V/3.3 V systems needing stronger drive; lacks overvoltage tolerance without external protection | Choose for ultra-low-voltage designs or higher-current loads; verify layout compatibility due to SOT-23-5 footprint mismatch |
Compared with 74HC1G126GV,125, the 74HCT1G126GV,125 offers TTL input compatibility at identical package and timing, while SN74LVC1G126DBVR provides wider low-voltage operation and higher drive but requires redesign for footprint and adds external ESD protection overhead.
Availability
74HC1G126GV,125 is available at Aetrix Electronics and suitable for industrial sensor interfaces, I²C level translation, and microcontroller GPIO expansion requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74HC1G126GV,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, reliable components for automotive, industrial, mobile, and computing applications, with leadership in logic, discrete, and MOSFET technologies.
This device belongs to Nexperia's 74HC logic family, engineered for low-power, high-noise-immunity digital interfacing in space- and energy-constrained embedded systems operating across industrial temperature ranges.
FAQ
What is the maximum recommended operating voltage for 74HC1G126GV,125?
The absolute maximum supply voltage is +7.0 V, but the recommended operating range is 2.0 V to 6.0 V per JEDEC JESD7A. Operation above 6.0 V risks exceeding input/output voltage limits and degrading long-term reliability, even if within absolute ratings. Designers should maintain VCC ≤ 6.0 V for guaranteed parametric performance and lifetime stability.
Can 74HC1G126GV,125 safely interface a 5 V signal to a 3.3 V microcontroller?
Yes - its input clamp diodes allow safe connection of signals up to VCC + 0.5 V when current-limited. With VCC = 3.3 V, a 5 V input must be series-resisted to limit IIK to ≤ ±20 mA. At 1.7 kΩ, current is ~1 mA, well within spec and avoiding damage while preserving logic thresholds.
Does 74HC1G126GV,125 support hot insertion or live bus swapping?
No - it lacks dedicated hot-swap protection circuitry such as power-up/down sequencing or bus-fault current limiting. While its 3-state output isolates Y during OE = LOW, applying VCC or signals before power stabilization may cause latch-up or undefined states. Use only in statically powered systems or with external hot-swap controllers.
How does the SC-74A (SOT753) package affect thermal performance?
The SC-74A package has a thermal resistance (RθJA) of 260 K/W (typ.) and derates linearly at 3.8 mW/K above 85 °C. At 125 °C ambient and 10 mW dissipation, junction temperature reaches ~151 °C - within rated max (150 °C) only with minimal self-heating. For sustained high-load operation, PCB copper area and airflow must be optimized.
74HC1G126GV,125 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HC
- 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:
- 7.8mA, 7.8mA
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-74A
74HC1G126GV,125 FAQ
1.How can I place an order for 74HC1G126GV,125 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC1G126GV,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 74HC1G126GV,125 reliable?
The price and inventory of 74HC1G126GV,125 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC1G126GV,125 is usually 5 days.
3.What payment methods are accepted for 74HC1G126GV,125?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC1G126GV,125 transactions.
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4.How is shipping managed for 74HC1G126GV,125?
74HC1G126GV,125 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC1G126GV,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 74HC1G126GV,125?
For technical support, including 74HC1G126GV,125 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC1G126GV,125 requirements.
6.How does Aetrix verify that 74HC1G126GV,125 is sourced from the original manufacturer or authorized distributors?
All 74HC1G126GV,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 74HC1G126GV,125 meets industry standards.
7.What is the process for return or replacement of 74HC1G126GV,125?
All 74HC1G126GV,125 units undergo pre-shipment inspection (PSI). If there is an issue with 74HC1G126GV,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 74HC1G126GV,125 part is unused and in its original packaging.
Return procedure for 74HC1G126GV,125:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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