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Diodes Incorporated 74AHCT1G126W5-7
- Part No.:
- 74AHCT1G126W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
74AHCT1G126W5-7.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:902
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Product details
Overview
74AHCT1G126W5-7 from Diodes Incorporated is a single non-inverting 3-state buffer IC designed for bus driving and signal isolation in 5V TTL-compatible digital systems. It features ±8 mA output drive at 5.0V, operates from 4.5V to 5.5V, enters high-impedance state when OE is LOW, and includes Schmitt-trigger inputs for noise immunity on slow-rising signals - used in PC peripheral interfaces and embedded control buses.
For engineers reviewing the 74AHCT1G126W5-7 datasheet, 74AHCT1G126W5-7 pinout, 74AHCT1G126W5-7 application, or 74AHCT1G126W5-7 equivalent, key selection criteria include guaranteed 3-state timing (tdis ≤ 8.5 ns @ -40°C to 125°C), input hysteresis (ΔV = 0.3 V), low ICC (≤40 μA), and SOT25 package compatibility with automated PCB assembly.
Technical Context
This device implements a single-channel non-inverting logic buffer with active-low 3-state enable control. Its Schmitt-trigger inputs provide 0.3 V hysteresis, enabling robust operation with slow-edge or noisy digital signals - critical in legacy bus environments and mixed-signal interface domains.
The output stage supports bidirectional current flow (±8 mA) and transitions between defined logic states and high-impedance mode under OE control. Propagation delay (tpd) is specified at 0.6–7.0 ns over temperature, with disable time (tdis) tightly aligned to enable timing for synchronous bus arbitration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - ensures compatibility with standard 5V TTL and CMOS logic rails without level-shifting. |
| IOH/IOL | ±8 mA - drives standard LS-TTL loads and supports fan-out of up to 10 74AHCT inputs. |
| tpd (CL=15pF) | 0.6–7.0 ns - enables sub-10 ns bus turnaround in high-speed control applications. |
| VIH/VIL | 2.0 V / 0.8 V - matches TTL input thresholds for seamless interfacing with legacy controllers. |
| IOZ (Leakage) | ≤10 μA - maintains signal integrity during 3-state hold in multi-driver bus configurations. |
| Ci | 2.0–10 pF - minimizes capacitive loading on upstream drivers and preserves edge rate integrity. |
Pinout & Package
SOT25 (5-pin SC-74A) surface-mount package with exposed pad not present; JEDEC-compliant footprint optimized for thermal dissipation (θJA = 204°C/W) and reflow compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Active-Low Output Enable | Drives Y to high-impedance when LOW; must be pulled HIGH or controlled by microcontroller GPIO for normal buffer operation. |
| 2 (A) | Data Input | Non-inverting input with Schmitt-trigger action - accepts slow-rising signals down to 20 ns/V slew rate without oscillation. |
| 3 (GND) | Ground Reference | Primary return path for all I/O and supply currents; requires low-inductance connection to system ground plane. |
| 4 (Y) | 3-State Output | Drives HIGH/LOW or floats; compatible with wired-OR bus topologies and shared data lines. |
| 5 (VCC) | Power Supply | Accepts 4.5–5.5 V; decoupling capacitor (0.1 μF ceramic) required within 5 mm for stable switching performance. |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs | 0.3 V hysteresis ensures reliable logic-level recognition of slow or noisy waveforms without external RC filtering. |
| 3-state output control | OE pin provides deterministic bus isolation with tdis ≤ 8.5 ns, supporting time-critical arbitration in shared-data systems. |
| ESD protection | 2 kV HBM, 1 kV CDM, 200 V MM - exceeds JEDEC standards for handling and board-level reliability. |
| Low power consumption | ICC ≤ 40 μA at 5.5 V - reduces quiescent load in always-on control subsystems and battery-backed modules. |
Applications
| PC Peripheral Interface | Embedded Microcontroller Bus |
|---|---|
Use Scenario: Isolating USB hub controller outputs from shared status LED driver lines. IC Role / Device Role / Timing Role: Non-inverting buffer with 3-state control synchronizes LED enable timing while preventing backfeed into the hub's GPIO bank. Use Value: Eliminates need for discrete MOSFET switches; Schmitt inputs tolerate marginal rise times from low-cost MCU pins. | Use Scenario: Driving address/data lines between an ARM Cortex-M0+ and legacy parallel EEPROM. IC Role / Device Role / Timing Role: Bidirectional bus buffer with OE-controlled directionality manages read/write handshaking without contention. Use Value: Sub-7 ns propagation delay ensures setup/hold compliance at 20 MHz bus clock; ±8 mA drive sustains signal integrity across 10 cm traces. |
| Industrial Control Panel | Digital Audio Signal Routing |
Use Scenario: Enabling/disabling sensor input multiplexer select lines in a PLC I/O module. IC Role / Device Role / Timing Role: Logic-level translator and enable gate for analog MUX control signals subject to EMI in factory environments. Use Value: 2 kV HBM ESD rating protects against operator-induced discharge; Schmitt inputs reject 50/60 Hz noise coupling on long front-panel wiring. | Use Scenario: Selecting between SPDIF and I²S audio paths in a portable media player. IC Role / Device Role / Timing Role: Single-pole switch for digital audio control signals requiring glitch-free path selection. Use Value: High-impedance state prevents signal leakage between inactive paths; low Ci (≤10 pF) avoids jitter degradation on 2.8 V peak-to-peak audio clocks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AHCT1G126DBVR | Same logic function, identical pinout, TI-manufactured; slightly higher ICC (max 50 μA) and lower tpd typical (2.5 ns). | Optimized for TI ecosystem designs; same SOT23-5 footprint but different marking and tape/reel packaging. | Select when sourcing from TI-authorized channels or requiring TI-specific qualification documentation. |
| 74LVC1G126GW,125 | Lower VCC range (1.65–5.5 V); 32 mA drive; no Schmitt inputs; higher IOZ (max 10 μA same, but wider temp range). | Supports mixed-voltage systems (1.8 V/3.3 V/5 V); unsuitable where input noise immunity is required. | Choose for voltage-flexible designs needing higher drive strength, but avoid where slow-rising control signals exist. |
Compared with SN74AHCT1G126DBVR and 74LVC1G126GW,125, the 74AHCT1G126W5-7 uniquely balances TTL-compatible thresholds, Schmitt noise rejection, and industrial-grade ESD - making it optimal for legacy 5V bus isolation where signal integrity trumps voltage flexibility.
Availability
74AHCT1G126W5-7 is available at Aetrix Electronics and suitable for PC peripheral interfaces, embedded microcontroller buses, industrial control panels, and digital audio routing requiring stable component supply and long-term production continuity.
Supply support for 74AHCT1G126W5-7 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 industrial, computing, and consumer applications.
The 74AHCT logic family targets cost-sensitive, high-volume 5V digital systems requiring TTL compatibility, low power, and robust noise immunity - especially in PC peripherals, storage interfaces, and legacy embedded control.
FAQ
What is the maximum operating temperature for the 74AHCT1G126W5-7?
The device is rated for operation from –40°C to +125°C ambient temperature. Junction temperature must not exceed +150°C under steady-state conditions. Thermal resistance θJA is 204°C/W for the SOT25 package, so power dissipation above ~25 mW requires careful PCB layout with thermal vias and copper pour.
Can the 74AHCT1G126W5-7 operate with a 3.3 V supply?
No - the 74AHCT1G126W5-7 is specified only for 4.5 V to 5.5 V operation. At 3.3 V, VIH minimum (2.0 V) is met, but VOH and VOL specifications degrade significantly, and output drive falls below guaranteed levels. Use 74LVC1G126 for true 3.3 V operation.
Is the OE pin internally pulled up or down?
The OE pin has no internal pull-up or pull-down resistor. It must be actively driven HIGH for normal buffer operation or LOW to enable 3-state mode. Leaving OE floating risks undefined output behavior and increased ICC due to input bias current interacting with stray capacitance.
Does the 74AHCT1G126W5-7 support hot insertion?
No - the device lacks hot-swap protection circuitry. Absolute maximum ratings specify VI and VO limits of –0.5 V to VCC +0.5 V. Applying voltage to Y or A before VCC is stable may cause latch-up or excessive clamp current. Always sequence VCC before signal application in hot-plug systems.
74AHCT1G126W5-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- 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:
- SOT-25
74AHCT1G126W5-7 FAQ
1.How can I place an order for 74AHCT1G126W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHCT1G126W5-7 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 74AHCT1G126W5-7 reliable?
The price and inventory of 74AHCT1G126W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHCT1G126W5-7 is usually 5 days.
3.What payment methods are accepted for 74AHCT1G126W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHCT1G126W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AHCT1G126W5-7?
74AHCT1G126W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHCT1G126W5-7 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 74AHCT1G126W5-7?
For technical support, including 74AHCT1G126W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHCT1G126W5-7 requirements.
6.How does Aetrix verify that 74AHCT1G126W5-7 is sourced from the original manufacturer or authorized distributors?
All 74AHCT1G126W5-7 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 74AHCT1G126W5-7 meets industry standards.
7.What is the process for return or replacement of 74AHCT1G126W5-7?
All 74AHCT1G126W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHCT1G126W5-7, 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 74AHCT1G126W5-7 part is unused and in its original packaging.
Return procedure for 74AHCT1G126W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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