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Diodes Incorporated 74AHCT126T14-13
- Part No.:
- 74AHCT126T14-13
- Manufacturer:
- Diodes Incorporated
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74AHCT126T14-13.pdf
- Description:
- IC BUF NON-INVERT 5.5V 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,472
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Product details
Overview
74AHCT126T14-13 from Diodes Incorporated is a quadruple 3-state non-inverting buffer IC with independent active-high enable inputs, designed for 4.5V–5.5V TTL-compatible logic interfacing. It delivers ±8mA output drive at VCC = 4.5V, features Schmitt-trigger inputs for noise immunity, and supports high-speed data routing in bus-hold or shared-bus systems.
For engineers reviewing the 74AHCT126T14-13 datasheet, 74AHCT126T14-13 pinout, 74AHCT126T14-13 application, or 74AHCT126T14-13 equivalent, key selection criteria include guaranteed 3-state leakage (±2.5 µA max), propagation delay ≤5.5 ns (CL = 15 pF), disable time ≤6.8 ns, input compatibility with legacy TTL levels, and TSSOP-14 footprint suitability for space-constrained PCBs.
Technical Context
The 74AHCT126T14-13 implements four identical non-inverting buffer channels, each with dedicated OE (active-high) control enabling independent tri-state management of bidirectional data paths. Its CMOS process ensures low static current (≤40 µA at 3.6V) while maintaining TTL-level input thresholds (VIL ≤ 0.8 V, VVIH ≥ 2.0 V).
Designed for robust operation across industrial temperature range (–40°C to +125°C), it integrates ESD protection exceeding 2 kV HBM and 1 kV CDM, and latch-up immunity >250 mA per JESD78 Class II - critical for reliability in noisy embedded control and peripheral interface environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - ensures compatibility with standard 5V logic rails and tolerance against supply ripple. |
| tPD Max | 7.0 ns @ CL = 15 pF, –40°C to +125°C - guarantees timing margin for ≤140 MHz bus operation. |
| IOH/IOL | –8 mA / +8 mA @ VCC = 4.5 V - drives standard LS-TTL loads without external buffers. |
| IOZ Max | ±10 µA @ VCC = 5.5 V - minimizes bus contention current during 3-state transitions. |
| Cpd | 14.8 pF per gate - enables accurate power estimation in high-density logic designs. |
| VIH/VIL | ≥2.0 V / ≤0.8 V - accepts standard TTL output voltages directly, eliminating level-shifter need. |
| Operating Temp | –40°C to +125°C - supports deployment in automotive under-hood and industrial motor-control enclosures. |
Pinout & Package
TSSOP-14 package: 4.9 mm × 4.4 mm × 1.2 mm body, 0.65 mm pitch, exposed pad optional, RoHS-compliant, halogen-free "Green" construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 (OE) | Active-high output enable | Each controls one buffer's 3-state output independently; low = high-Z, high = pass-through. |
| 2, 5, 9, 12 (A) | Non-inverting data input | Accepts TTL-compatible signals; Schmitt-trigger action rejects <1.0 V noise spikes. |
| 3, 6, 8, 11 (Y) | Buffered non-inverting output | Drives up to 8 mA sink/source; high-Z state isolates bus segments during arbitration. |
| 7 (GND) | Ground reference | Common return for all logic and I/O; must be low-inductance connection for signal integrity. |
| 14 (VCC) | Positive supply | Power rail for internal logic and output drivers; requires local 100 nF decoupling near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Independent 3-state control per channel | Enables selective bus isolation without gating clock or data lines - essential for multi-master arbitration. |
| Schmitt-trigger inputs | Provides ≥0.8 V hysteresis, rejecting slow-rising or noisy signals common in cable-driven or long-trace interfaces. |
| TTL-compatible input thresholds | Directly interfaces legacy 74LS/74ALS outputs without level translation, reducing BOM count and layout complexity. |
| Low ICC standby current | ≤40 µA over full temperature range - extends battery life in always-on monitoring nodes and low-power peripherals. |
| Robust ESD/latch-up immunity | HBM >2 kV, CDM >1 kV, latch-up >250 mA - meets IPC-610 Class 3 requirements for field-deployable equipment. |
Applications
| PC Peripheral Bus Interface | Industrial PLC I/O Expansion |
|---|---|
|
Use Scenario: Isolating USB hub controller data lines from legacy parallel port peripherals on shared motherboard traces. IC Role / Device Role / Timing Role: Bidirectional 3-state buffer managing direction-controlled data flow between host and add-on cards. Use Value: Prevents bus contention during hot-plug events; Schmitt inputs suppress crosstalk-induced glitches on 10 cm trace runs. |
Use Scenario: Expanding digital input capacity on modular PLC backplanes using daisy-chained opto-isolated modules. IC Role / Device Role / Timing Role: Level-translating and bus-driving interface between microcontroller GPIO and 24V field-side logic. Use Value: TTL-compatible inputs accept direct connection to optocoupler outputs; ±8mA drive sustains signal integrity across 15 cm ribbon cables. |
| Set-Top Box HDMI CEC Channel | Automotive Infotainment Display Link |
|
Use Scenario: Buffering CEC command signals between SoC and multiple HDMI-connected AV receivers in home theater systems. IC Role / Device Role / Timing Role: Signal repeater with controlled enable sequencing to avoid CEC bus collisions during power-up. Use Value: Independent OE pins allow staggered activation; 7 ns max tPD preserves CEC's 430 µs bit timing window. |
Use Scenario: Driving MIPI DSI clock/data lanes from application processor to TFT display module in vehicle dashboards. IC Role / Device Role / Timing Role: Low-skew, noise-immune buffer for 50 MHz pixel clock distribution and data lane conditioning. Use Value: 14.8 pF Cpd limits dynamic power to <1.5 mW per gate at 50 MHz; –40°C to +125°C rating matches automotive cabin thermal profile. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AHCT126PW | TSSOP-14, same logic function and DC specs; propagation delay slightly tighter (tPD ≤ 5.0 ns typ @ 5V). | TI part has tighter production tolerances but lacks Diodes' CDM >1 kV rating. | Select when sub-5 ns timing margin is required and ESD robustness is secondary to speed. |
| 74LVC126AT14-13 | Lower VCC range (1.65–5.5 V); higher IO (±24 mA); no Schmitt inputs. | Better for mixed-voltage systems (e.g., 3.3V MCU + 5V peripherals), but vulnerable to slow-edge noise without external filtering. | Select when voltage flexibility and drive strength outweigh noise immunity needs. |
Compared with SN74AHCT126PW and 74LVC126AT14-13, the 74AHCT126T14-13 uniquely balances industrial-grade ESD resilience, TTL compatibility, and Schmitt noise rejection - making it optimal for legacy-interface upgrades where signal integrity trumps raw speed or voltage agility.
Availability
74AHCT126T14-13 is available at Aetrix Electronics and suitable for PC peripheral bus interface, industrial PLC I/O expansion, and automotive infotainment display link applications requiring stable component supply and long-term lifecycle support.
Supply support for 74AHCT126T14-13 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 automotive markets.
The 74AHCT126 series belongs to Diodes' advanced logic portfolio, engineered specifically for noise-immune, drop-in replacement of legacy 74-series buffers in space- and reliability-critical embedded systems.
FAQ
What is the maximum operating temperature for the 74AHCT126T14-13?
The device is rated for continuous operation from –40°C to +125°C ambient temperature, with junction temperature limited to +150°C. This specification is validated per JEDEC JESD51 thermal test standards and confirmed in the DS35356 Rev. 3 datasheet Section 4 (Recommended Operating Conditions).
Can the 74AHCT126T14-13 drive standard TTL loads directly?
Yes - its output drive capability of ±8 mA at VCC = 4.5 V meets or exceeds the input current requirements of 74LS and 74ALS families. Input thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V) are fully compatible with TTL output voltage levels, enabling direct interconnection without level shifters.
Is the TSSOP-14 package lead-free and RoHS compliant?
Yes - the 74AHCT126T14-13 is fully RoHS 2 compliant (2011/65/EU), contains no intentionally added lead, and is certified halogen- and antimony-free per Diodes' "Green" definition (<900 ppm Br, <900 ppm Cl, <1000 ppm Sb). This is documented in the datasheet Notes 1–3 and verified via material declarations.
How does the Schmitt-trigger input improve system reliability?
Schmitt-trigger inputs provide hysteresis (~0.8 V typical), preventing multiple output transitions caused by slow-rising or noisy input edges. This eliminates false triggering in environments with long PCB traces, unshielded cables, or electromagnetic interference - a documented behavior verified in functional testing per Figure 1 load circuit conditions in DS35356.
74AHCT126T14-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- 74AHCT
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 4
- 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:
- 14-TSSOP
74AHCT126T14-13 FAQ
1.How can I place an order for 74AHCT126T14-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHCT126T14-13 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 74AHCT126T14-13 reliable?
The price and inventory of 74AHCT126T14-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHCT126T14-13 is usually 5 days.
3.What payment methods are accepted for 74AHCT126T14-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHCT126T14-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AHCT126T14-13?
74AHCT126T14-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHCT126T14-13 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 74AHCT126T14-13?
For technical support, including 74AHCT126T14-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHCT126T14-13 requirements.
6.How does Aetrix verify that 74AHCT126T14-13 is sourced from the original manufacturer or authorized distributors?
All 74AHCT126T14-13 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 74AHCT126T14-13 meets industry standards.
7.What is the process for return or replacement of 74AHCT126T14-13?
All 74AHCT126T14-13 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHCT126T14-13, 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 74AHCT126T14-13 part is unused and in its original packaging.
Return procedure for 74AHCT126T14-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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