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Diodes Incorporated 74AHC126T14-13
- Part No.:
- 74AHC126T14-13
- Manufacturer:
- Diodes Incorporated
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74AHC126T14-13.pdf
- Description:
- IC BUF NON-INVERT 5.5V 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
74AHC126T14-13 from Diodes Incorporated is a quadruple 3-state non-inverting buffer IC with independent active-high enable inputs, designed for voltage-level translation and bus isolation in mixed-supply systems. It operates from 2.0V to 5.5V, supports 8mA output drive at 4.5V, features Schmitt-trigger inputs, and is packaged in a RoHS-compliant TSSOP-14. Used in PC peripheral interfaces and set-top box data buses.
For engineers reviewing the 74AHC126T14-13 datasheet, 74AHC126T14-13 pinout, 74AHC126T14-13 application, or 74AHC126T14-13 equivalent, key selection criteria include 3-state timing (tEN ≤ 7.5ns @ 5V), input tolerance to 5.5V, VCC range flexibility, and TSSOP-14 thermal performance in space-constrained logic routing.
Technical Context
This AHC-family device implements four identical non-inverting buffers, each with dedicated active-high 3-state enable (OE) control-no shared bus control logic required. All inputs exhibit Schmitt-trigger action, providing noise immunity with typical hysteresis of 0.3V at 3.3V.
It supports bidirectional voltage translation: 3.3V outputs interface safely with 5V-tolerant inputs, and 5V inputs drive 3.3V logic without level shifters. Propagation delay is specified down to 3.0ns (typ) at 5V/CL=15pF, with disable time tDIS ≤ 8.5ns (max) over full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0V to 5.5V - enables direct use across 2.5V, 3.3V, and 5V domains without regulators |
| Input Voltage Tolerance | Up to 5.5V - allows 5V signals to drive 3.3V-powered device without clamping diodes or external protection |
| Output Drive Strength | ±8mA @ VCC = 4.5V - sufficient to drive 15pF loads with <8ns propagation delay in standard logic buses |
| Propagation Delay (tPD) | ≤5.5ns max @ 5V/CL=15pF - meets timing budgets for high-speed address/data latching in embedded controllers |
| Enable/Disable Time | tEN ≤ 7.5ns, tDIS ≤ 8.5ns @ 5V - ensures clean bus turnaround with minimal contention window in multiplexed I/O |
| Input Hysteresis | Typical 0.3V @ 3.3V - rejects >100mV of noise on slow-rising control or data lines in industrial environments |
| ESD Robustness | HBM 2kV, CDM 1kV - exceeds JEDEC JESD22-A114/A101, reducing board-level ESD protection component count |
Pinout & Package
TSSOP-14 package: 4.4mm × 5.0mm body, 0.65mm pitch, 1.0mm max height, lead-free and halogen-free per Diodes Inc. "Green" definition.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | 1OE, 2OE, 3OE, 4OE | Active-high 3-state enable inputs - each controls one buffer independently; tied high for always-on operation |
| 2, 5, 9, 12 | 1A, 2A, 3A, 4A | Non-inverting data inputs - accept 3.3V or 5V logic; Schmitt-triggered for noisy signal integrity |
| 3, 6, 8, 11 | 1Y, 2Y, 3Y, 4Y | Buffered non-inverting outputs - high-impedance when OE = low; drive ±8mA at 4.5V |
| 7 | GND | Ground reference - must be low-inductance connection to minimize switching noise coupling |
| 14 | VCC | Power supply - bypass with 100nF ceramic capacitor near pin to suppress rail collapse during output transitions |
Key Features
| Feature | Design Value |
|---|---|
| Independent 3-state control per channel | Four separate OE pins allow selective bus segment isolation without global reset or sequencing |
| Schmitt-trigger inputs | 0.3V typical hysteresis improves noise margin on slow or unterminated traces in legacy system upgrades |
| 5.5V-tolerant inputs at any VCC ≥ 2.0V | Eliminates need for external level translators when interfacing 5V microcontrollers to 3.3V FPGAs |
| Low dynamic power (Cpd = 15pF @ 5V) | Reduces switching current demand and heat generation in dense logic arrays operating at 10MHz+ |
| Industrial temperature range (–40°C to +125°C) | Validated operation across automotive cabin and industrial PLC ambient conditions without derating |
Applications
| PC Peripheral Interface | Set-Top Box Data Bus |
|---|---|
Use Scenario: Isolating USB hub controller data lines from downstream port transceivers during suspend mode. IC Role / Device Role / Timing Role: 3-state buffer enabling/disabling bi-directional D+/D− paths under firmware control. Use Value: Prevents signal contention and back-powering during sleep states while maintaining <8ns enable timing for fast resume. |
Use Scenario: Driving HDMI CEC and SPDIF control signals between SoC and tuner module in multi-standard broadcast receivers. IC Role / Device Role / Timing Role: Level-translating buffer for 3.3V SoC outputs to 5V-tolerant tuner inputs with noise-immune Schmitt inputs. Use Value: Eliminates discrete resistor-divider networks and reduces BOM count by consolidating four channels in one TSSOP-14 footprint. |
| Industrial PLC I/O Expansion | Notebook Embedded Controller Bus |
Use Scenario: Buffering isolated analog-to-digital converter (ADC) status flags to main controller over long PCB traces. IC Role / Device Role / Timing Role: Non-inverting repeater with hysteresis to restore degraded digital flag edges in electrically noisy cabinet environments. Use Value: Maintains signal integrity over 10cm+ traces without added termination, verified to operate reliably at –40°C to +85°C. |
Use Scenario: Managing keyboard scan matrix and touchpad interrupt lines between EC and southbridge in ultra-thin laptop designs. IC Role / Device Role / Timing Role: Low-capacitance (Ci = 4.0pF) buffer isolating EC GPIOs from shared interrupt bus to prevent crosstalk. Use Value: Enables simultaneous keypress detection with <5ns skew across four buffered lines, critical for responsive UX. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AHC126PW (TI) | TSSOP-14, same AHC family specs but slightly higher ICC (max 50μA vs 40μA) and no CDM rating published | Identical pinout and function; TI version lacks explicit 1kV CDM ESD rating in datasheet | Prefer Diodes' 74AHC126T14-13 where CDM robustness is required in automated assembly environments |
| 74LVC126AT14-13 (Diodes Inc.) | LVC family: lower VCC range (1.65–5.5V), higher drive (±24mA), but no Schmitt inputs and 3.6V max input rating | Better for high-drive, low-voltage apps; unsuitable for 5V-tolerant mixed-voltage translation | Select LVC variant only when driving heavy capacitive loads (>30pF) and all signals remain ≤3.6V |
Compared with SN74AHC126PW and 74LVC126AT14-13, the 74AHC126T14-13 uniquely combines 5.5V input tolerance, Schmitt-trigger noise immunity, and guaranteed 1kV CDM ESD - making it optimal for legacy-to-modern interface bridging where signal integrity and assembly reliability are jointly critical.
Availability
74AHC126T14-13 is available at Aetrix Electronics and suitable for PC peripheral interfaces, set-top box data buses, and industrial PLC I/O expansion requiring stable component supply, consistent TSSOP-14 sourcing, and long-term lifecycle support.
Supply support for 74AHC126T14-13 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 semiconductor company specializing in discrete, analog, and logic solutions, with design centers in Asia, Europe, and the US, serving industrial, computing, and consumer markets.
The 74AHC126 belongs to Diodes' AHC logic family-engineered for low-power, high-noise-immunity 3-state buffering in mixed-voltage embedded systems where reliability and pin compatibility across voltage domains are essential.
FAQ
Can 74AHC126T14-13 be used with a 1.8V supply?
No. The absolute minimum recommended VCC is 2.0V per DS35346 Rev. 4–2. At 1.8V, input thresholds (VIH min = 1.5V @ 2.0V) and output drive fall outside specification, risking logic misreads and weak high-level output. Use 74LVC126 for 1.65V–5.5V operation.
What is the maximum capacitive load this device can drive reliably?
The datasheet specifies timing up to CL = 50pF (tPD ≤ 14.5ns @ 3.3V). For reliable signal integrity beyond 50pF, add series termination or reduce edge rate via series resistor; the device's 8mA drive limits practical load to ~40pF at <10ns rise times without overshoot.
Are the enable inputs internally pulled down?
No. The datasheet explicitly states unused inputs must be held at VCC or GND. There are no internal pull resistors on OE pins; floating OE causes undefined output state and increased ICC due to input stage instability.
Does this part support hot-swap insertion?
No. While 5.5V-tolerant inputs help, the device lacks powered-off protection (Ioff) and bus-hold circuitry. Insertion into a live backplane risks latch-up or transient overstress on VCC/GND pins. Use hot-swap controllers or dedicated hot-plug buffers instead.
74AHC126T14-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- 74AHC
- 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:
- 2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
74AHC126T14-13 FAQ
1.How can I place an order for 74AHC126T14-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHC126T14-13 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 74AHC126T14-13 reliable?
The price and inventory of 74AHC126T14-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHC126T14-13 is usually 5 days.
3.What payment methods are accepted for 74AHC126T14-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHC126T14-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AHC126T14-13?
74AHC126T14-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHC126T14-13 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 74AHC126T14-13?
For technical support, including 74AHC126T14-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHC126T14-13 requirements.
6.How does Aetrix verify that 74AHC126T14-13 is sourced from the original manufacturer or authorized distributors?
All 74AHC126T14-13 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 74AHC126T14-13 meets industry standards.
7.What is the process for return or replacement of 74AHC126T14-13?
All 74AHC126T14-13 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHC126T14-13, 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 74AHC126T14-13 part is unused and in its original packaging.
Return procedure for 74AHC126T14-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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