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Diodes Incorporated 74AHCT1G126SE-7
- Part No.:
- 74AHCT1G126SE-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
74AHCT1G126SE-7.pdf
- Description:
- IC BUF NON-INVERT 5.5V SOT353
- Quantity:
- Payment:
- Shipping:
Inventory:587,047
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Product details
Overview
74AHCT1G126SE-7 from Diodes Incorporated is a single non-inverting 3-state buffer gate in SOT353 package, operating at 4.5V–5.5V supply, delivering ±8 mA output drive at 5.0V, with Schmitt-trigger inputs for noise immunity, and designed for bus interface isolation in compact logic systems.
For engineers reviewing the 74AHCT1G126SE-7 datasheet, 74AHCT1G126SE-7 pinout, 74AHCT1G126SE-7 application, or 74AHCT1G126SE-7 equivalent, key selection criteria include 3-state enable timing (tEN/tDIS ≤ 6.5 ns), input hysteresis (ΔVIN ≈ 0.3 V), thermal resistance (θJA = 371 °C/W), and RoHS-compliant lead-free finish.
Technical Context
This device implements a single-channel CMOS buffer with active-high output enable (OE) control, enabling high-impedance (Z) state on Y when OE = LOW. Its Schmitt-trigger inputs tolerate slow-rising/falling signals (≥20 ns/V transition rate), reducing susceptibility to noise-induced glitches.
It operates strictly within TTL-compatible voltage thresholds (VIL ≤ 0.8 V, VVIH ≥ 2.0 V) and supports load capacitances up to 50 pF while maintaining propagation delay tPD ≤ 7.0 ns at VCC = 5 V. The SOT353 package provides space-constrained PCB integration with verified thermal performance under JEDEC-standard board conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures compatibility with standard 5 V TTL/CMOS systems without level-shifting. |
| Output Drive | ±8 mA at 5.0 V - Sufficient to drive multiple 74-series inputs or moderate capacitive loads (≤50 pF). |
| Propagation Delay | tPD ≤ 7.0 ns (CL = 50 pF, VCC = 5 V) - Enables reliable operation in sub-100 MHz digital control paths. |
| Input Hysteresis | ≈0.3 V (Schmitt-trigger action) - Rejects noise on slow edges, eliminating false toggling in noisy industrial environments. |
| 3-State Enable Time | tEN ≤ 6.5 ns (CL = 50 pF) - Supports fast bus arbitration and dynamic signal routing in multiplexed data paths. |
| ESD Protection | HBM > 2000 V, CDM > 1000 V - Meets IEC 61000-4-2 Level 3 requirements for handling robustness. |
| Thermal Resistance | θJA = 371 °C/W (SOT353) - Requires minimal copper area for thermal management in ambient ≤125 °C applications. |
Pinout & Package
SOT353 (5-pin, 1.2 mm × 2.1 mm × 0.95 mm) surface-mount package with gull-wing leads, RoHS-compliant lead-free finish, and green molding compound (Br/Sb-free).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Output Enable (active-high) | Drives Y into high-impedance state when LOW; enables bus sharing without contention. |
| 2 (A) | Data Input | Non-inverting logic input with Schmitt-trigger threshold (VIL = 0.8 V, VIH = 2.0 V). |
| 3 (GND) | Ground Reference | Return path for all internal currents; must be low-inductance connection for stable switching. |
| 4 (Y) | 3-State Output | Buffered, non-inverted A signal; enters Z-state when OE = LOW (IOZ ≤ 10 μA). |
| 5 (VCC) | Power Supply | Positive rail (4.5–5.5 V); bypass capacitor (0.1 μF) required near pin for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| CMOS low power consumption | ICC ≤ 40 μA over full temperature range - Reduces standby current in battery-backed or energy-sensitive systems. |
| Schmitt-trigger inputs | Input hysteresis ≈ 0.3 V - Eliminates need for external RC filtering on slow control lines (e.g., pushbutton debouncing). |
| 3-state output control | tEN/tDIS ≤ 6.5 ns (CL = 50 pF) - Enables precise time-multiplexed bus access in FPGA/CPU peripheral interfaces. |
| Robust ESD protection | HBM > 2000 V, CDM > 1000 V - Survives handling and board-level transients without external TVS diodes. |
| Green packaging | Halogen-free, RoHS-compliant molding compound - Meets environmental compliance for EU, China, and Japan markets. |
Applications
| Industrial Control I/O Expansion | Embedded Microcontroller Bus Isolation |
|---|---|
Use Scenario: Isolating GPIO lines between MCU and legacy 5 V peripherals (e.g., sensors, displays) during hot-swap or firmware update. IC Role / Device Role / Timing Role: Bidirectional bus buffer with controlled 3-state enable to prevent signal contention during reconfiguration. Use Value: Prevents data corruption by ensuring only one driver asserts the bus at any time, with <6.5 ns enable timing matching MCU GPIO toggle rates. |
Use Scenario: Driving address/data lines from an ARM Cortex-M microcontroller to external SPI flash or SRAM with shared bus architecture. IC Role / Device Role / Timing Role: Non-inverting level translator and bus driver with Schmitt-trigger inputs tolerating slow clock edges from low-power modes. Use Value: Eliminates external pull-ups and reduces layout complexity while maintaining signal integrity up to 50 pF loading. |
| Consumer Audio Device Signal Routing | Automotive Infotainment Display Interface |
Use Scenario: Selecting between two audio source paths (e.g., Bluetooth vs. AUX) using OE-controlled signal gating in portable speakers. IC Role / Device Role / Timing Role: Single-channel analog switch substitute for digital audio control signals (e.g., mute, channel select). Use Value: Provides clean break-before-make behavior via 3-state isolation, avoiding pop/click artifacts during source switching. |
Use Scenario: Buffering display enable or backlight control signals from infotainment SoC to LED driver ICs in automotive dashboards. IC Role / Device Role / Timing Role: Noise-immune logic buffer interfacing between high-noise vehicle power domains and sensitive display subsystems. Use Value: Schmitt-trigger inputs reject conducted EMI from alternator ripple or motor drivers, preventing spurious display resets. |
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 | Wider VCC range (1.65–5.5 V), lower drive (±24 mA), no Schmitt inputs | Better for mixed-voltage systems (1.8 V/3.3 V), but requires external noise filtering in noisy environments | Select when interfacing with sub-3.3 V logic or needing lower ICC (<10 μA), not for unfiltered industrial signals |
| 74AHC1G126SE-7 | Higher VCC max (5.5 V), identical pinout/package, but no Schmitt inputs and higher IOL/IOH (±8 mA same) | Lower input hysteresis increases susceptibility to noise; suitable only in clean, short-trace PCB layouts | Choose only if Schmitt-trigger function is unnecessary and cost is primary constraint; verify noise margin in final layout |
Compared with SN74LVC1G126DBVR and 74AHC1G126SE-7, the 74AHCT1G126SE-7 uniquely combines TTL-compatible thresholds, built-in Schmitt-trigger noise immunity, and proven 5 V bus-driving capability-making it optimal for legacy 5 V industrial and automotive control interfaces where signal integrity cannot rely on external filtering.
Availability
74AHCT1G126SE-7 is available at Aetrix Electronics and suitable for industrial control I/O expansion, embedded microcontroller bus isolation, and consumer audio signal routing requiring stable component supply and long-term production continuity.
Supply support for 74AHCT1G126SE-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, application-optimized components for industrial, computing, and automotive markets.
The 74AHCT logic family targets 5 V TTL-compatible digital interface applications, emphasizing noise immunity, bus contention prevention, and robust operation across extended temperature ranges (–40 °C to +125 °C).
FAQ
What is the maximum allowable load capacitance for stable operation?
The 74AHCT1G126SE-7 is characterized up to 50 pF load capacitance per the datasheet switching tests. At CL = 50 pF and VCC = 5 V, tPD remains ≤ 7.0 ns and output rise/fall times stay within specification. Exceeding 50 pF may increase propagation delay nonlinearly and risk marginal timing in high-speed buses.
Can the OE pin be left floating during operation?
No. The OE pin must be actively driven HIGH or LOW; floating OE risks undefined output state due to internal leakage paths. Per datasheet Note 3, unused inputs-including OE-must be tied to VCC or GND via ≤1 kΩ resistor to ensure deterministic 3-state control and avoid increased ICC or latch-up risk.
Does this device support hot-swap or live-insertion scenarios?
Yes, the 74AHCT1G126SE-7 supports hot-swap when OE is held LOW during insertion to force Y into high-impedance state. Its absolute maximum rating for VO (–0.5 V to VCC + 0.5 V) and IOZ leakage (≤10 μA) allow safe connection to powered buses, provided VCC ramp-up sequencing is controlled per JEDEC JESD8-12.
How does the Schmitt-trigger input improve system reliability?
The Schmitt-trigger input provides ≈0.3 V hysteresis (VIH – VIL), rejecting noise spikes and slow transitions that could cause multiple toggles on a single edge. This eliminates false triggering in electrically noisy environments-such as motor drives or automotive cabins-without requiring external RC filters or software debouncing.
74AHCT1G126SE-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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-353
74AHCT1G126SE-7 FAQ
1.How can I place an order for 74AHCT1G126SE-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHCT1G126SE-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 74AHCT1G126SE-7 reliable?
The price and inventory of 74AHCT1G126SE-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHCT1G126SE-7 is usually 5 days.
3.What payment methods are accepted for 74AHCT1G126SE-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHCT1G126SE-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AHCT1G126SE-7?
74AHCT1G126SE-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHCT1G126SE-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 74AHCT1G126SE-7?
For technical support, including 74AHCT1G126SE-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHCT1G126SE-7 requirements.
6.How does Aetrix verify that 74AHCT1G126SE-7 is sourced from the original manufacturer or authorized distributors?
All 74AHCT1G126SE-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 74AHCT1G126SE-7 meets industry standards.
7.What is the process for return or replacement of 74AHCT1G126SE-7?
All 74AHCT1G126SE-7 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHCT1G126SE-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 74AHCT1G126SE-7 part is unused and in its original packaging.
Return procedure for 74AHCT1G126SE-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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