My Inquiry
My Account
Texas Instruments SN74AHCT1G126DCKT
- Part No.:
- SN74AHCT1G126DCKT
- Manufacturer:
- Texas Instruments
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
SN74AHCT1G126DCKT.pdf
- Description:
- IC BUF NON-INVERT 5.5V SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:15,233
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74AHCT1G126DCKT from Texas Instruments is a single-channel 3-state bus buffer gate with TTL-compatible inputs, operating at 4.5–5.5 V, delivering 6 ns max propagation delay at 5 V, ±8 mA output drive, and 10 µA max quiescent current. It serves as a level-translating line driver in 5 V digital bus interfaces where controlled output enable and low-ringing signal integrity are required.
For engineers reviewing the SN74AHCT1G126DCKT datasheet, SN74AHCT1G126DCKT pinout, SN74AHCT1G126DCKT application, or SN74AHCT1G126DCKT equivalent, this page delivers verified electrical specs, SC-70-5 package details, functional mode behavior, real-world use cases in ADAS and server motherboards, and two validated alternative parts for design flexibility.
Technical Context
The SN74AHCT1G126DCKT implements a true-buffer logic function with active-high output enable (OE), enabling high-impedance state when OE = LOW and transparent A→Y data flow when OE = HIGH. Its TTL-compatible input thresholds (VIL = 0.8 V, VIH = 2.0 V) support reliable interfacing with legacy 3.3 V logic while operating from a 5 V supply.
It features slow edge rates to suppress output ringing under light loads, low ICC (≤10 µA), and robust ESD protection (±2000 V HBM). Thermal resistance is RθJA = 289.2 °C/W in the SC-70 (DCK) package, with operating temperature spanning –40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures compatibility with standard 5 V logic rails and tolerance against supply ripple. |
| Max Propagation Delay | 6 ns at 5 V, CL = 15 pF - Enables timing-critical bus buffering up to ~100 MHz clock domains. |
| Output Drive Strength | ±8 mA at 5 V - Sufficient to drive multiple CMOS inputs or short PCB traces without external termination. |
| Input Compatibility | TTL voltage levels (VIL ≤ 0.8 V, VIH ≥ 2.0 V) - Allows direct connection to 3.3 V microcontrollers or FPGAs without level shifters. |
| Quiescent Current | 10 µA max ICC - Supports low-power standby modes in always-on subsystems like ADAS sensor hubs. |
| Operating Temperature | –40°C to +125°C - Qualified for industrial and automotive under-hood environments. |
| ESD Rating | ±2000 V HBM - Meets JEDEC JS-001 for robust handling in manufacturing and field deployment. |
Pinout & Package
SN74AHCT1G126DCKT uses the SC-70-5 (DCK) surface-mount package: 2.0 mm × 2.1 mm body size, 1.25 mm × 2.0 mm footprint, 1.1 mm max height, 5-pin single-row layout with pin 1 marked in the top-left corner (Q3 quadrant per tape orientation).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OE | Active-high output enable input | Drives Y to high-impedance when LOW; ties to GND via pulldown resistor for power-up safety. |
| 2 - A | True logic input | Accepts TTL-level signals; passes directly to Y when OE = HIGH. |
| 3 - GND | Ground reference | Return path for all internal circuitry; must be low-inductance connection to minimize noise coupling. |
| 4 - Y | 3-state buffered output | Provides true (non-inverted) output; high-Z state prevents bus contention during disable. |
| 5 - VCC | Positive supply rail | Requires local 0.1 µF ceramic bypass capacitor placed within 2 mm of pin for stable switching. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | Enables seamless 3.3 V → 5 V up-translation without external level shifters in mixed-voltage systems. |
| Slow edge rate control | Reduces output ringing and EMI on unterminated traces, critical for clean signal integrity in graphics cards and DLP systems. |
| Low ICC (≤10 µA) | Minimizes system standby power in always-on modules such as motor control watchdog circuits. |
| High-impedance output state | Prevents bus contention in multi-driver configurations like server motherboard address/data buses. |
| Latch-up immunity >250 mA | Ensures reliability under transient overvoltage or ground-bounce events per JESD17. |
Applications
| Motor Control Interface | ADAS Sensor Hub |
|---|---|
Use Scenario: Isolating microcontroller GPIOs from high-noise motor driver ICs in AC induction drives. IC Role / Device Role / Timing Role: Bus buffer providing direction-controlled signal isolation and 3-state capability during fault shutdown. Use Value: Prevents back-driving and contention during motor stall conditions while maintaining TTL-compatible input thresholds. |
Use Scenario: Level-shifting camera or radar sensor data lines into a 5 V domain processor in advanced driver assistance systems. IC Role / Device Role / Timing Role: Single-channel translator enabling 3.3 V sensor outputs to interface safely with 5 V image processing ASICs. Use Value: Eliminates need for discrete resistive dividers or dedicated level shifters, reducing BOM count and board space. |
| Server Motherboard I/O Expansion | DLP Projection System Timing Control |
Use Scenario: Enabling/disabling peripheral address lines on hot-pluggable PCIe riser cards. IC Role / Device Role / Timing Role: 3-state buffer managing shared address bus segments with precise OE-controlled timing windows. Use Value: Guarantees glitch-free bus arbitration during card insertion/removal without requiring FPGA reconfiguration. |
Use Scenario: Driving high-speed pixel clock or control signals to DMD (Digital Micromirror Device) controllers in front projection systems. IC Role / Device Role / Timing Role: Low-ringing buffer ensuring clean edge transitions for sub-ns timing-critical display synchronization. Use Value: Suppresses overshoot/undershoot that could cause DMD misfiring or image artifacts in high-resolution projection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AHCT1G125DCKT | Inverting buffer (A → Y̅); identical voltage, timing, and package specs. | Required where logic inversion is needed in signal path (e.g., active-low enable chains). | Select when functional inversion aligns with system-level control architecture; otherwise not drop-in. |
| SN74LVC1G126DCKR | Lower VCC range (1.65–5.5 V); higher speed (tPD = 3.7 ns typ); 3.3 V optimized. | Better suited for mixed-voltage 3.3 V/5 V systems with tighter timing budgets. | Choose for new designs targeting broader supply flexibility and faster edges; requires validation of 3.3 V input compatibility. |
Compared with SN74AHCT1G126DCKT, SN74AHCT1G125DCKT provides identical performance with inverted logic, while SN74LVC1G126DCKR offers wider voltage operation and faster timing but shifts design focus toward 3.3 V-centric systems - making each suitable only when their specific functional or supply constraints match the target application.
Availability
SN74AHCT1G126DCKT is available at Aetrix Electronics and suitable for motor controls, ADAS sensor interfaces, and server motherboard I/O expansion requiring stable component supply across industrial temperature ranges and long-lifecycle programs.
Supply support for SN74AHCT1G126DCKT 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions, with over 90 years of innovation in high-reliability components.
The SN74AHCT1G126DCKT belongs to TI's AHCT logic family, engineered for TTL-compatible 5 V bus interfacing with low power, high noise immunity, and industrial-grade thermal performance.
FAQ
What is the recommended power supply decoupling for SN74AHCT1G126DCKT?
A 0.1 µF ceramic capacitor must be placed within 2 mm of the VCC pin (Pin 5) and GND (Pin 3) to suppress high-frequency switching noise. For systems with multiple logic devices, adding a bulk 1 µF capacitor nearby further stabilizes the 5 V rail. This configuration ensures clean power delivery and prevents output ringing during fast transitions in the SN74AHCT1G126DCKT.
Does SN74AHCT1G126DCKT support 3.3 V input signals?
Yes - SN74AHCT1G126DCKT has TTL-compatible inputs with VIL ≤ 0.8 V and VIH ≥ 2.0 V, allowing reliable recognition of 3.3 V logic HIGH/LOW levels when powered from 5 V. This makes the SN74AHCT1G126DCKT ideal for up-translating signals from 3.3 V microcontrollers or FPGAs into 5 V bus domains without external level shifters.
What happens to the output of SN74AHCT1G126DCKT during power-up?
During power-up, the SN74AHCT1G126DCKT output enters an undefined state until VCC stabilizes and OE is asserted. To guarantee high-impedance at power-on, TI recommends tying OE (Pin 1) to GND through a pulldown resistor (value determined by driver strength). This prevents bus contention and ensures safe initialization of the SN74AHCT1G126DCKT in multi-device systems.
Can SN74AHCT1G126DCKT drive a 50 pF load reliably?
Yes - SN74AHCT1G126DCKT specifies tPLH/tPHL ≤ 9.5 ns and tPZH/tPZL ≤ 11 ns at CL = 50 pF and 5 V, confirming reliable operation into heavier capacitive loads typical of longer PCB traces or fanout to multiple gates. Its ±8 mA drive strength and controlled edge rates maintain signal integrity without external termination when driving such loads in the SN74AHCT1G126DCKT.
Is SN74AHCT1G126DCKT pin-compatible with other SC-70-5 logic buffers?
SN74AHCT1G126DCKT shares the SC-70-5 (DCK) footprint and 5-pin assignment (OE-A-GND-Y-VCC) with TI's SN74AHCT1G125DCKT and SN74LVC1G126DCKR, enabling mechanical compatibility. However, functional differences - such as inversion in SN74AHCT1G125DCKT - mean electrical substitution requires schematic review. The SN74AHCT1G126DCKT itself is not a generic drop-in replacement without verifying logic polarity and timing alignment.
SN74AHCT1G126DCKT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHCT
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- SC-70-5
SN74AHCT1G126DCKT FAQ
1.How can I place an order for SN74AHCT1G126DCKT through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHCT1G126DCKT 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 SN74AHCT1G126DCKT reliable?
The price and inventory of SN74AHCT1G126DCKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHCT1G126DCKT is usually 5 days.
3.What payment methods are accepted for SN74AHCT1G126DCKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AHCT1G126DCKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74AHCT1G126DCKT?
SN74AHCT1G126DCKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHCT1G126DCKT 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 SN74AHCT1G126DCKT?
For technical support, including SN74AHCT1G126DCKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHCT1G126DCKT requirements.
6.How does Aetrix verify that SN74AHCT1G126DCKT is sourced from the original manufacturer or authorized distributors?
All SN74AHCT1G126DCKT 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 SN74AHCT1G126DCKT meets industry standards.
7.What is the process for return or replacement of SN74AHCT1G126DCKT?
All SN74AHCT1G126DCKT units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHCT1G126DCKT, 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 SN74AHCT1G126DCKT part is unused and in its original packaging.
Return procedure for SN74AHCT1G126DCKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74AHCT1G126DCKT Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
