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Diodes Incorporated 74AHC1G126QW5-7
- Part No.:
- 74AHC1G126QW5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
74AHC1G126QW5-7.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:2,041
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Product details
Overview
74AHC1G126QW5-7 from Diodes Incorporated is an automotive-grade single non-inverting buffer with 3-state output, designed for bidirectional bus interfacing and signal isolation in power-constrained systems. It operates across 2.0V–5.5V supply, delivers ±8mA drive at 4.5V, features Schmitt-trigger inputs for noise immunity, and supports Grade 1 temperature range (−40°C to +125°C).
For engineers reviewing the 74AHC1G126QW5-7 datasheet, 74AHC1G126QW5-7 pinout, 74AHC1G126QW5-7 application, or 74AHC1G126QW5-7 equivalent, key selection criteria include 3-state enable timing (tEN/tDIS ≤ 9.5ns @ VCC=5V), low ICC (≤40μA), input voltage tolerance beyond VCC, and AEC-Q100 qualification for automotive control modules.
Technical Context
This device implements a CMOS-based single-channel buffer with active-low 3-state output control (OE). Its Schmitt-trigger inputs accept slow-rising signals without oscillation, enabling robust operation in noisy automotive environments. The logic function is strictly non-inverting: Y = A when OE = HIGH; Y = high-impedance when OE = LOW.
It uses standard AHC logic family characteristics - rail-to-rail output swing, balanced rise/fall times, and propagation delay as low as 3.4ns (typ.) at 5V/15pF load. Input clamping and ESD protection (2kV HBM, 1kV CDM) are integrated per AEC-Q100 requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0V to 5.5V - supports mixed-voltage system interfacing (e.g., 3.3V MCU to 5V peripheral) |
| Output Drive Strength | ±8mA @ 4.5V - sufficient to drive 15pF loads with <7ns propagation delay and maintain signal integrity |
| Propagation Delay (tPD) | 3.4ns (typ.) @ 5V/15pF - enables reliable timing in sub-100MHz digital control paths |
| 3-State Enable/Disable Time | tEN = 3.6ns, tDIS = 4.1ns (typ.) @ 5V/15pF - minimizes bus contention during state transitions |
| Operating Temperature | −40°C to +125°C (Grade 1) - qualified for under-hood automotive ECUs and industrial motor controllers |
| ESD Protection | 2000V HBM, 1000V CDM - exceeds AEC-Q100-002/-011 for assembly-line robustness |
| Input Voltage Tolerance | −0.5V to 6.5V - allows hot-swap and level-shifting without external clamping diodes |
Pinout & Package
SOT25 (3.0mm × 2.8mm × 1.2mm, 0.95mm lead pitch) - compact surface-mount package with exposed pad not present; suitable for high-density PCB layouts in automotive ADAS and body control modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (A) | Data Input | Non-inverting logic input; Schmitt-triggered for noise margin ≥0.3V at 3.3V |
| 2 (OE) | Output Enable (Active Low) | Assert LOW to enable output; HIGH places Y in high-impedance state - critical for bus arbitration |
| 3 (Y) | Data Output | 3-state buffered output; drives up to ±8mA while maintaining VOH ≥3.94V @ 4.5V |
| 4 (GND) | Ground Reference | Return path for all internal logic and output current; must be low-inductance connection |
| 5 (VCC) | Power Supply | CMOS core supply; decoupling capacitor (100nF) required within 5mm for stable switching |
Key Features
| Feature | Design Value |
|---|---|
| Automotive Qualification | AEC-Q100 Grade 1 qualified, PPAP-capable, manufactured in IATF 16949 facilities - meets OEM sourcing requirements |
| Schmitt-Trigger Inputs | Hysteresis ≥0.3V at 3.3V - rejects noise on long traces or unshielded harnesses in vehicle networks |
| Wide Supply Range | 2.0V–5.5V operation - eliminates need for level shifters between 2.5V, 3.3V, and 5V subsystems |
| Low Static Power | ICC ≤ 40μA max @ −40°C to +125°C - reduces thermal load in sealed enclosures |
| Robust ESD/Latchup | 2kV HBM, 100mA latchup immunity - withstands handling and transient events in production environments |
Applications
| Automotive Body Control Module | Industrial PLC I/O Expansion |
|---|---|
|
Use Scenario: Isolating microcontroller GPIOs from high-noise solenoid driver circuits in door lock or lighting control units. IC Role / Device Role / Timing Role: Signal buffer with 3-state enable synchronizing MCU write cycles to prevent bus contention during firmware updates. Use Value: Schmitt-trigger inputs reject PWM-coupled noise from adjacent 12V loads; ±8mA drive ensures clean edges into 500Ω termination. |
Use Scenario: Level-shifting and bus buffering between 3.3V FPGA logic and legacy 5V sensor interface cards in modular PLC backplanes. IC Role / Device Role / Timing Role: Non-inverting buffer enabling hot-swap capability via OE-controlled 3-state isolation during card insertion/removal. Use Value: Input voltage tolerance (−0.5V to 6.5V) prevents damage during voltage sequencing mismatches; tEN ≤ 6.5ns avoids data corruption. |
| Automotive Infotainment Display Interface | Medical Diagnostic Equipment Data Bus |
|
Use Scenario: Driving parallel LCD segment lines from a low-power ARM Cortex-M0+ MCU in dashboard displays. IC Role / Device Role / Timing Role: Single-gate buffer isolating display controller outputs to reduce capacitive loading and crosstalk on dense flex PCBs. Use Value: Propagation delay ≤7.0ns @ 5V/50pF ensures pixel clock alignment across multi-segment drivers; Grade 1 temp rating sustains operation near heat-generating SoCs. |
Use Scenario: Interfacing isolated ADC data lines to a central microcontroller in portable ultrasound or ECG devices requiring low EMI emissions. IC Role / Device Role / Timing Role: Low-power buffer minimizing standby current (<1μA typical ICC) while maintaining signal fidelity over 10cm PCB traces. Use Value: 10pF CPD and <40μA ICC reduce radiated emissions and extend battery life; AEC-Q100 qualification validates reliability for Class II medical use. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC1G126DBVR | Lower VCC range (1.65V–5.5V); ±24mA drive @ 3.3V; no Schmitt inputs | Better for high-drive 3.3V-only systems; lacks noise immunity for automotive harness interfaces | Choose when higher output current is needed and input signals are clean; verify layout noise margins. |
| 74AUP1G126GW,125 | Ultra-low power (ICC ≤ 0.9μA typ.); VCC = 0.8V–3.6V; slower tPD (12.4ns @ 3.0V) | Optimized for battery-powered wearables; insufficient for 5V automotive buses or fast timing paths | Prefer for energy-constrained portable diagnostics where speed <10MHz suffices and 5V compatibility is unnecessary. |
Compared with SN74LVC1G126DBVR and 74AUP1G126GW,125, the 74AHC1G126QW5-7 uniquely balances Grade 1 automotive qualification, Schmitt-trigger noise rejection, and 5V-tolerant operation - making it the only choice for mixed-voltage, high-reliability vehicle control nodes.
Availability
74AHC1G126QW5-7 is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC I/O expansion, infotainment display interfaces, and medical diagnostic equipment requiring stable component supply across extended temperature ranges.
Supply support for 74AHC1G126QW5-7 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for automotive, industrial, and computing markets.
This device belongs to Diodes' AHC logic family - engineered for low-power, wide-supply, AEC-Q100-compliant digital interfacing in harsh-environment control systems.
FAQ
Is the 74AHC1G126QW5-7 pin-compatible with other SOT25-packaged single buffers?
Yes - it shares identical SOT25 pinout (A-OE-Y-GND-VCC) with industry-standard 3-state buffers like SN74LVC1G126DBVR and 74AUP1G126GW. However, Schmitt-trigger inputs and AEC-Q100 qualification are unique to this Diodes variant; electrical behavior under marginal input slew rates differs significantly.
What is the maximum capacitive load this buffer can drive while maintaining timing specs?
The datasheet specifies timing parameters up to 50pF load (e.g., tPD = 4.8ns max @ 5V/50pF). Driving >50pF increases propagation delay nonlinearly and may cause setup/hold violations; for >100pF loads, add series termination or consider dual-stage buffering per Diodes' AN-7001 guidelines.
Can OE be left floating in circuit design?
No - OE must be actively driven HIGH or LOW. Floating OE risks indeterminate output state, increased ICC, and potential bus contention. Diodes recommends tying OE to VCC or GND via 10kΩ resistor if permanently enabled/disabled, per Recommended Operating Conditions Note 7.
Does this part support hot-swap or live-insertion in backplane applications?
Yes - its input voltage tolerance (−0.5V to 6.5V) and 3-state output allow safe insertion into powered backplanes. However, OE must be held inactive (HIGH) during insertion to prevent output contention; sequence VCC before signal assertion as defined in Diodes' AN-7003 hot-swap guidance.
74AHC1G126QW5-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- 74AHC
- 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:
- 2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
74AHC1G126QW5-7 FAQ
1.How can I place an order for 74AHC1G126QW5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHC1G126QW5-7 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 74AHC1G126QW5-7 reliable?
The price and inventory of 74AHC1G126QW5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHC1G126QW5-7 is usually 5 days.
3.What payment methods are accepted for 74AHC1G126QW5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHC1G126QW5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AHC1G126QW5-7?
74AHC1G126QW5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHC1G126QW5-7 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 74AHC1G126QW5-7?
For technical support, including 74AHC1G126QW5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHC1G126QW5-7 requirements.
6.How does Aetrix verify that 74AHC1G126QW5-7 is sourced from the original manufacturer or authorized distributors?
All 74AHC1G126QW5-7 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 74AHC1G126QW5-7 meets industry standards.
7.What is the process for return or replacement of 74AHC1G126QW5-7?
All 74AHC1G126QW5-7 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHC1G126QW5-7, 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 74AHC1G126QW5-7 part is unused and in its original packaging.
Return procedure for 74AHC1G126QW5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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