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Diodes Incorporated 74AHCT1G125QSE-7
- Part No.:
- 74AHCT1G125QSE-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
74AHCT1G125QSE-7.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V SOT353
- Quantity:
- Payment:
- Shipping:
Inventory:10,966
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Product details
Overview
74AHCT1G125QSE-7 from Diodes Incorporated is an automotive-grade single non-inverting 3-state buffer with ±8mA output drive at 4.5V, operating across -40°C to +125°C, designed for bus driving and signal isolation in 5V logic systems with strict AEC-Q100 qualification.
For engineers reviewing the 74AHCT1G125QSE-7 datasheet, 74AHCT1G125QSE-7 pinout, 74AHCT1G125QSE-7 application, or 74AHCT1G125QSE-7 equivalent, this device supports high-reliability 5V digital interfacing where low-power CMOS operation, Schmitt-trigger input tolerance, and fast 3.4ns typical propagation delay are critical selection criteria.
Technical Context
This buffer implements a single-channel non-inverting logic gate with active-low 3-state enable (OE), enabling bidirectional bus control in automotive and industrial digital subsystems. Its Schmitt-trigger inputs tolerate slow-rising signals up to 20 ns/V transition rate, while balanced drive capability ensures matched rise/fall times.
Designed for 4.5V–5.5V supply operation, it delivers 3.94V VOH at -8mA load and 0.36V VOL at +8mA load, with Z-state leakage under 0.25μA at 5.5V - meeting stringent AEC-Q100 requirements for latch-up immunity (>100mA), ESD robustness (2kV HBM), and thermal stability (TJ up to +150°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Single non-inverting buffer with 3-state output controlled by active-low OE |
| Supply Voltage Range | 4.5V to 5.5V - compatible with standard 5V TTL/CMOS systems |
| Output Drive | ±8mA at VCC = 4.5V - sufficient to drive multiple 74-series loads or PCB traces |
| Propagation Delay | 3.4ns typical (CL = 15pF) - enables timing-critical signal buffering up to ~100MHz |
| Operating Temperature | -40°C to +125°C ambient - Grade 1 automotive qualification per AEC-Q100 |
| Input Threshold | VIL ≤ 0.8V, VIH ≥ 2.0V at VCC = 5V - ensures noise margin >1.2V in noisy environments |
| Z-State Leakage | ≤0.25μA at VO = 0–5.5V - prevents unintended loading of shared buses during disable |
Pinout & Package
SOT353 (SC-70-5) package: 2.15mm × 2.1mm × 1.1mm body, 0.65mm lead pitch, matte tin-plated leads, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (A) | Data Input | Non-inverting logic input; accepts 0–5.5V swing, Schmitt-triggered for noise immunity |
| 2 (OE) | Output Enable (Active-Low) | Drives output Y to high-impedance when HIGH; enables bus sharing without contention |
| 3 (GND) | Ground Reference | Return path for all internal logic and I/O; must be low-impedance for stable switching |
| 4 (Y) | Data Output | 3-state buffered replica of A; sinks/sours ±8mA; Z-state leakage <0.25μA |
| 5 (VCC) | Power Supply | 4.5–5.5V supply rail; decoupling capacitor required within 5mm for noise suppression |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs | Enables reliable operation with slow-rising signals (≤20 ns/V), reducing need for external filtering |
| AEC-Q100 Grade 1 qualification | Validated for automotive use with full PPAP support and IATF 16949 manufacturing |
| Low power consumption | ICC ≤ 40μA max at 5.5V - extends battery life in always-on vehicle modules |
| ESD robustness | 2000V HBM and 1000V CDM - protects against assembly and field handling damage |
| Lead-free & green compliance | Fully RoHS 3 compliant (<900ppm Br/Cl, <1000ppm Sb); halogen- and antimony-free |
Applications
| Automotive Body Control Module | Industrial PLC I/O Expansion |
|---|---|
Use Scenario: Isolating microcontroller GPIO pins from high-noise CAN/LIN transceiver control lines in door module ECUs. IC Role / Device Role / Timing Role: 3-state buffer isolates MCU outputs during bus arbitration; OE synchronized to protocol state machine. Use Value: Prevents signal contention on shared control busses while maintaining <3.4ns timing margin for real-time response. |
Use Scenario: Driving discrete 24V optocoupler inputs from 5V FPGA I/O banks in modular PLC backplanes. IC Role / Device Role / Timing Role: Level-shifting and current-boosting interface between low-voltage logic and isolated field-side drivers. Use Value: ±8mA drive capability eliminates need for discrete transistor stages, reducing BOM count and board area. |
| Automotive Infotainment Display Interface | High-Reliability Networking Equipment |
Use Scenario: Enabling/disabling LVDS serializer control signals during display power sequencing in head-unit systems. IC Role / Device Role / Timing Role: Controlled 3-state gating of clock and data enable lines to prevent metastability during power transitions. Use Value: Z-state leakage <0.25μA ensures no DC loading on downstream receivers during sleep mode. |
Use Scenario: Buffering configuration register writes from ARM Cortex-M7 to multi-channel Ethernet PHYs in telecom edge routers. IC Role / Device Role / Timing Role: Signal integrity preservation across 10cm PCB traces with matched rise/fall times and low skew. Use Value: Balanced propagation delays (tPLH ≈ tPHL) minimize jitter accumulation in synchronous control paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AHCT1G125DBVR | Same logic function, SOT-23-5 package (3.0×2.8mm), higher θJA (385°C/W vs 184°C/W) | Less thermally efficient in dense layouts; requires larger copper pour for same TJ | Select when legacy SOT-23 footprint compatibility is mandatory over thermal performance |
| 74LVC1G125GW,125 | Lower VCC range (1.65–5.5V), ±32mA drive, but only AEC-Q100 Grade 2 (-40°C to +105°C) | Not qualified for under-hood applications requiring +125°C ambient operation | Choose only for non-automotive 5V systems needing higher drive strength and wider voltage flexibility |
Compared with SN74AHCT1G125DBVR and 74LVC1G125GW,125, the 74AHCT1G125QSE-7 uniquely combines Grade 1 automotive temperature rating, SOT353's compact thermal profile (θJA = 184°C/W), and guaranteed ±8mA drive at 4.5V - making it optimal for space-constrained, high-temperature vehicle control nodes.
Availability
74AHCT1G125QSE-7 is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, and high-reliability networking equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74AHCT1G125QSE-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 with ISO/TS 16949 and IATF 16949 certified facilities.
The 74AHCT logic family targets automotive and industrial 5V digital interfacing, emphasizing AEC-Q100 qualification, robust ESD/latch-up performance, and consistent timing behavior across extreme temperatures.
FAQ
Is the 74AHCT1G125QSE-7 pin-compatible with standard 74AHCT1G125 variants?
Yes - it shares identical pinout (SOT353: A-OE-GND-Y-VCC) and logic function with industry-standard 74AHCT1G125 devices. The "Q" suffix denotes AEC-Q100 qualification, and "SE" specifies SOT353 packaging; electrical and timing specs align with JEDEC-compliant AHCT logic families.
What is the maximum capacitive load this buffer can drive while maintaining specified timing?
The datasheet guarantees tPD ≤ 5.5ns (max) at CL = 15pF and ≤ 7.5ns (max) at CL = 50pF. For reliable operation, total load capacitance - including PCB trace, via, and receiver input - must stay ≤50pF. Exceeding this increases propagation delay and may cause setup/hold violations in synchronous systems.
Can the OE pin be left floating in circuit design?
No - OE must be actively driven HIGH or LOW. Floating OE risks indeterminate output state, potentially causing bus contention or excessive ICC. Per datasheet Note 7, unused inputs should be tied to VCC or GND; OE should be pulled LOW (enabled) via resistor or driven by controller GPIO to ensure defined behavior at power-up.
Does this device support mixed-voltage interfacing, e.g., 3.3V input into a 5V system?
Yes - inputs are not limited by VCC and tolerate VI = 0–6.5V, allowing direct connection to 3.3V logic without level shifters. However, output swing remains 0–VCC (0–5.5V), so downstream 3.3V receivers must have 5V-tolerant inputs or require external clamping.
74AHCT1G125QSE-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-353
74AHCT1G125QSE-7 FAQ
1.How can I place an order for 74AHCT1G125QSE-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHCT1G125QSE-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 74AHCT1G125QSE-7 reliable?
The price and inventory of 74AHCT1G125QSE-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHCT1G125QSE-7 is usually 5 days.
3.What payment methods are accepted for 74AHCT1G125QSE-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHCT1G125QSE-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AHCT1G125QSE-7?
74AHCT1G125QSE-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHCT1G125QSE-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 74AHCT1G125QSE-7?
For technical support, including 74AHCT1G125QSE-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHCT1G125QSE-7 requirements.
6.How does Aetrix verify that 74AHCT1G125QSE-7 is sourced from the original manufacturer or authorized distributors?
All 74AHCT1G125QSE-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 74AHCT1G125QSE-7 meets industry standards.
7.What is the process for return or replacement of 74AHCT1G125QSE-7?
All 74AHCT1G125QSE-7 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHCT1G125QSE-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 74AHCT1G125QSE-7 part is unused and in its original packaging.
Return procedure for 74AHCT1G125QSE-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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