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Texas Instruments SN74AHCT1G126DCK3
- Part No.:
- SN74AHCT1G126DCK3
- Manufacturer:
- Texas Instruments
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
SN74AHCT1G126DCK3.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:15,000
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Product details
Overview
SN74AHCT1G126DCK3 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 ICC. It serves as a level-translating line driver in 5 V digital buses where controlled output enable and low-ringing signal integrity are required.
For engineers reviewing the SN74AHCT1G126DCK3 datasheet, SN74AHCT1G126DCK3 pinout, SN74AHCT1G126DCK3 application, or SN74AHCT1G126DCK3 equivalent, key selection criteria include its SC-70-5 package footprint, true/non-inverting logic path (A→Y), OE-controlled high-impedance state, and compatibility with 3.3 V-to-5 V up-translation in space-constrained interfaces.
Technical Context
The SN74AHCT1G126DCK3 implements a CMOS-based non-inverting buffer with active-high output enable (OE), enabling precise control of bus contention in shared-data-path systems. Its TTL-input thresholds (VIL = 0.8 V, VIH = 2.0 V) allow direct interfacing with legacy 3.3 V logic while driving 5 V loads.
It features slow-edge-rate design to suppress output ringing under light capacitive loads, and includes latch-up immunity exceeding 250 mA per JESD17. Thermal resistance (RθJA = 289.2 °C/W) and ESD robustness (±2000 V HBM) support reliable operation in industrial ambient conditions (–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 data routing in high-speed digital subsystems |
| Output Drive | ±8 mA at 5 V - sufficient for driving multiple CMOS inputs or short PCB traces without external buffering |
| Input Compatibility | TTL voltage levels (VIH = 2.0 V, VIL = 0.8 V) - allows seamless integration with 3.3 V microcontrollers and FPGAs |
| Quiescent Current | 10 µA max ICC - supports low-power standby modes in battery-backed or energy-sensitive applications |
| Operating Temperature | –40°C to +125°C - qualified for automotive under-hood, industrial motor control, and server motherboard environments |
| ESD Rating | ±2000 V HBM - meets IEC 61000-4-2 Level 2 requirements for handling robustness during assembly and field service |
Pinout & Package
SN74AHCT1G126DCK3 uses the SC-70 (DCK) 5-pin surface-mount package, measuring 2.0 mm × 2.1 mm body size with 1.25 mm width, optimized for high-density PCB layouts.
| 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-compatible signals; passes unchanged to Y when OE is high |
| 3 - GND | Ground reference | Return path for all internal circuitry and output current; must be low-inductance connection |
| 4 - Y | 3-state buffered output | Delivers true A signal when OE = high; presents >10⁶ Ω impedance when OE = low |
| 5 - VCC | Positive supply | 5 V nominal rail; requires local 0.1 µF ceramic bypass capacitor placed adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| Slow-edge-rate outputs | Reduces overshoot/undershoot on unterminated lines, minimizing EMI and signal integrity issues in compact layouts |
| TTL-input threshold optimization | Enables reliable 3.3 V logic driving 5 V buses without level-shifter ICs or resistive dividers |
| Low-power 3-state control | Eliminates bus contention current while consuming only 10 µA in disabled state |
| Latch-up immunity | Exceeds 250 mA per JESD17 - prevents destructive failure during transient overvoltage events |
Applications
| Motor Control Interface | Server Board Signal Isolation |
|---|---|
Use Scenario: Isolating microcontroller GPIOs from high-noise motor driver enable lines in AC induction drives. IC Role / Device Role / Timing Role: SN74AHCT1G126DCK3 acts as a noise-immune, OE-gated buffer between MCU and gate driver inputs. Use Value: Prevents false triggering during EFT bursts by blocking noise coupling through high-impedance state during idle cycles. | Use Scenario: Enabling/disabling peripheral address/data lines on server motherboards during hot-plug or power sequencing. IC Role / Device Role / Timing Role: SN74AHCT1G126DCK3 provides controlled bus segmentation with sub-7 ns timing margin. Use Value: Eliminates floating-bus states during reset, ensuring deterministic BIOS initialization and PCIe link training. |
| DLP Projection Timing Sync | ADAS Sensor Data Multiplexing |
Use Scenario: Routing pixel clock and sync signals from FPGA to DMD controller in front-projection systems. IC Role / Device Role / Timing Role: SN74AHCT1G126DCK3 buffers LVCMOS-level timing signals with minimal jitter addition. Use Value: Maintains <100 ps edge uncertainty across temperature, preserving image alignment fidelity. | Use Scenario: Time-multiplexing radar and camera sensor data onto shared CAN/FlexRay interface lines in ADAS ECUs. IC Role / Device Role / Timing Role: SN74AHCT1G126DCK3 gates sensor output streams using synchronized OE control. Use Value: Enables deterministic arbitration-free data handoff without adding propagation skew to safety-critical paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC1G126DCK3 | Lower VCC range (1.65–5.5 V); higher drive (±32 mA); faster tpd (3.7 ns typ) | Better suited for mixed-voltage 1.8/2.5/3.3/5 V systems; less tolerant of 5 V-only legacy designs | Select when multi-supply interoperability or higher drive is needed; verify VIH/VIL compatibility with source logic |
| 74AHC1G126SE-7 | Same 4.5–5.5 V range; slightly higher ICC (20 µA max); identical pinout and function | Optimized for high-reliability industrial use; same thermal profile but different MSL rating (Level 1 vs Level 3) | Prefer for extended-life deployments where long-term parametric stability outweighs minor quiescent current penalty |
Compared with SN74LVC1G126DCK3 and 74AHC1G126SE-7, the SN74AHCT1G126DCK3 offers superior TTL-input compatibility and lower static power in pure 5 V systems, making it optimal for legacy upgrades and cost-sensitive industrial controls where 3.3 V logic coexistence is not required.
Availability
SN74AHCT1G126DCK3 is available at Aetrix Electronics and suitable for motor control interfaces, server board signal isolation, DLP projection timing sync, and ADAS sensor data multiplexing requiring stable component supply across automotive, industrial, and computing end markets.
Supply support for SN74AHCT1G126DCK3 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 industrial, automotive, and communications infrastructure.
The SN74AHCT1G126DCK3 belongs to TI's AHCT logic family-designed specifically for 5 V TTL-compatible bus interfacing with enhanced noise immunity and robust latch-up performance in harsh environments.
FAQ
What is the recommended power supply decoupling for SN74AHCT1G126DCK3?
A 0.1 µF ceramic capacitor must be placed as close as possible to the VCC pin of SN74AHCT1G126DCK3, with short, low-inductance traces to GND. This minimizes supply transients during output switching and ensures stable operation across –40°C to 125°C. For systems with multiple logic devices, parallel 1 µF bulk capacitance may also be added near the power entry point.
Does SN74AHCT1G126DCK3 support 3.3 V input logic levels?
Yes, SN74AHCT1G126DCK3 explicitly supports 3.3 V TTL-compatible inputs: its VIH threshold is 2.0 V min and VIL is 0.8 V max, allowing direct connection to 3.3 V microcontrollers and FPGAs while driving 5 V loads-enabling clean 3.3 V-to-5 V up-translation without external level shifters.
How does the output-enable (OE) pin behave during power-up?
During power-up, SN74AHCT1G126DCK3 OE pin must be held low via a pulldown resistor to ensure Y remains in high-impedance state until system control logic stabilizes. TI recommends a resistor value selected based on the driver's sourcing capability-typically 10 kΩ-to prevent bus contention before firmware initializes OE control.
What is the maximum capacitive load SN74AHCT1G126DCK3 can drive reliably?
SN74AHCT1G126DCK3 is characterized for CL = 15 pF and 50 pF loads, with tPLH/tPHL specified up to 9.5 ns at 50 pF. For reliable signal integrity, keep total trace + load capacitance ≤50 pF. Exceeding this increases propagation delay and risk of ringing-especially without series termination or controlled-impedance routing.
Is SN74AHCT1G126DCK3 pin-compatible with other SC-70-5 logic buffers?
SN74AHCT1G126DCK3 shares the SC-70-5 footprint and pin assignment (OE-A-GND-Y-VCC) with TI's SN74LVC1G126DCK3 and SN74AHC1G126DCK3, enabling drop-in substitution in many cases. However, verify VIH/VIL, drive strength, and thermal derating-especially under sustained 125°C operation-before replacement.
SN74AHCT1G126DCK3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHCT
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Bulk
- 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:
- SC-70-5
SN74AHCT1G126DCK3 FAQ
1.How can I place an order for SN74AHCT1G126DCK3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHCT1G126DCK3 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 SN74AHCT1G126DCK3 reliable?
The price and inventory of SN74AHCT1G126DCK3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHCT1G126DCK3 is usually 5 days.
3.What payment methods are accepted for SN74AHCT1G126DCK3?
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SN74AHCT1G126DCK3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHCT1G126DCK3 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 SN74AHCT1G126DCK3?
For technical support, including SN74AHCT1G126DCK3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHCT1G126DCK3 requirements.
6.How does Aetrix verify that SN74AHCT1G126DCK3 is sourced from the original manufacturer or authorized distributors?
All SN74AHCT1G126DCK3 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 SN74AHCT1G126DCK3 meets industry standards.
7.What is the process for return or replacement of SN74AHCT1G126DCK3?
All SN74AHCT1G126DCK3 units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHCT1G126DCK3, 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 SN74AHCT1G126DCK3 part is unused and in its original packaging.
Return procedure for SN74AHCT1G126DCK3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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