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Texas Instruments SN74AHCT1G126DCKR
- Part No.:
- SN74AHCT1G126DCKR
- Manufacturer:
- Texas Instruments
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
SN74AHCT1G126DCKR.pdf
- Description:
- IC BUF NON-INVERT 5.5V SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:15,864
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Product details
Overview
SN74AHCT1G126DCKR from Texas Instruments is a single 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 SN74AHCT1G126DCKR datasheet, SN74AHCT1G126DCKR pinout, SN74AHCT1G126DCKR application, or SN74AHCT1G126DCKR equivalent, key selection criteria include its SC-70 (DCK) 5-pin package, 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 industrial and automotive interfaces.
Technical Context
The SN74AHCT1G126DCKR implements a CMOS-based non-inverting buffer with active-high output enable (OE), enabling bidirectional bus control when paired with complementary devices. 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 rates (20 ns/V input transition rate) to suppress output ringing and overshoot, and includes latch-up immunity exceeding 250 mA per JESD17 - critical for motor control and ADAS subsystems exposed to transient noise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures robust operation across industrial 5 V rails with ±10% tolerance |
| Max Propagation Delay | 6 ns at 5 V, CL = 15 pF - supports >100 MHz bus timing margins in server motherboard data paths |
| Output Drive | ±8 mA at 5 V - sufficient to drive standard 50 Ω transmission lines or multiple 74-series inputs without external buffering |
| Input Compatibility | TTL voltage levels (VIL ≤ 0.8 V, VIH ≥ 2.0 V) - enables direct connection to 3.3 V microcontrollers without level shifters |
| Quiescent Current | 10 µA max ICC - minimizes standby power in always-on ADAS sensor hubs and DLP projection timing modules |
| Operating Temperature | –40 °C to +125 °C - qualified for under-hood automotive and industrial motor drive environments |
| ESD Rating | ±2000 V HBM - meets IEC 61000-4-2 Level 2 for board-level ESD robustness in graphics card add-in modules |
Pinout & Package
SN74AHCT1G126DCKR 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 in compact embedded systems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OE | Active-high output enable | Drives Y to high-impedance when low; must be pulled to GND via resistor during power-up to prevent bus contention |
| 2 - A | True logic input | Accepts TTL-compatible signals; passes unchanged to Y when OE = high |
| 3 - GND | Ground reference | Return path for all internal logic and output current; requires low-inductance connection to system ground plane |
| 4 - Y | 3-state buffered output | Provides non-inverted A signal when OE = high; enters high-Z state when OE = low - essential for shared-bus arbitration |
| 5 - VCC | Power supply | 5 V nominal supply; requires local 0.1 µF ceramic bypass capacitor placed within 2 mm of pin |
Key Features
| Feature | Design Value |
|---|---|
| Slow-edge output drivers | 20 ns/V input transition rate limits dV/dt, reducing EMI and eliminating overshoot on unterminated traces in motor control feedback loops |
| TTL-input compatibility | VIL = 0.8 V / VIH = 2.0 V enables seamless 3.3 V MCU-to-5 V peripheral interfacing without external translators in DLP projector timing chains |
| High-impedance output control | OE pin allows precise timing of bus release, preventing contention in multi-driver server motherboard memory buffers |
| Latch-up immunity | Exceeds 250 mA per JESD17 - ensures reliability in automotive ADAS camera modules subject to load dump transients |
Applications
| Motor Control Interface | Graphics Card Bus Isolation |
|---|---|
Use Scenario: Isolating FPGA configuration signals from high-noise PWM gate drivers in AC induction motor inverters. IC Role / Device Role / Timing Role: 3-state buffer isolating control logic from power stage; OE synchronized to PWM dead-time to prevent shoot-through. Use Value: ±8 mA drive sustains signal integrity across 10 cm PCB traces; slow edges suppress coupling into analog current-sense circuits. | Use Scenario: Enabling/disabling PCIe-sideband signals (CLKREQ#, PERST#) during hot-plug events on discrete GPU add-in cards. IC Role / Device Role / Timing Role: Bidirectional bus buffer with OE tied to slot presence detect; provides clean enable/disable sequencing for reset and clock request lines. Use Value: 6 ns tPLH/tPHL ensures sub-10 ns timing alignment with PCIe 5.0 reference clocks; SC-70 footprint saves space near edge connectors. |
| ADAS Sensor Hub | DLP Projection Timing |
Use Scenario: Level-shifting camera sensor sync pulses (3.3 V LVCMOS) to 5 V timing controllers in forward-facing radar/camera fusion units. IC Role / Device Role / Timing Role: Single-channel up-translator with OE used for frame-synchronized gating of exposure triggers. Use Value: TTL input thresholds accept 3.3 V logic directly; –40 °C to +125 °C rating matches under-hood ambient requirements. | Use Scenario: Driving high-speed pixel clock distribution to DMD micromirror arrays in front-projection systems requiring jitter-free 100+ MHz clocks. IC Role / Device Role / Timing Role: Low-skew buffer stage between clock generator and DMD interface; OE used for blanking during frame retrace. Use Value: 14 pF power dissipation capacitance minimizes clock loading; 5.5 V max VCC accommodates margin for supply ripple in optical engine power domains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC1G126DCKR | Lower VCC range (1.65–5.5 V); 3.3 V optimized; 3.7 ns tPD at 3.3 V; ±24 mA drive | Better suited for mixed-voltage 3.3 V/5 V systems; higher drive may increase ringing without termination | Select when interfacing with 1.8 V/2.5 V logic or requiring higher sink/source capability at lower voltages |
| MC74VHC1GT126DTT1G | Wider VCC (2–5.5 V); 7.5 ns tPD at 5 V; ±8 mA drive; different SC-70 pinout (OE on pin 2) | Pinout incompatible; requires PCB redesign; identical functional behavior and thermal specs | Choose only if second-source qualification mandates ON Semiconductor parts; verify layout compatibility before migration |
Compared with SN74LVC1G126DCKR and MC74VHC1GT126DTT1G, the SN74AHCT1G126DCKR offers superior noise immunity via TTL input thresholds and guaranteed 5 V operation - making it optimal for legacy 5 V industrial backplanes where voltage margin and ESD robustness outweigh ultra-low-delay needs.
Availability
SN74AHCT1G126DCKR is available at Aetrix Electronics and suitable for motor control interfaces, ADAS sensor hubs, graphics card sideband management, and DLP projection timing circuits requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74AHCT1G126DCKR 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 connectivity technologies, with over 90 years of innovation in high-reliability industrial and automotive components.
The SN74AHCT1G126DCKR belongs to TI's 74AHCT logic family - designed specifically for 5 V TTL-compatible interfacing in noise-sensitive, thermally demanding applications such as motor drives and advanced driver assistance systems.
FAQ
What is the recommended power supply decoupling for SN74AHCT1G126DCKR?
TI specifies a 0.1 µF ceramic capacitor placed as close as possible to the VCC pin (Pin 5) of the SN74AHCT1G126DCKR, with short, low-inductance traces to GND (Pin 3). This mitigates switching noise and ensures stable 5 V operation during output transitions. For systems with multiple logic devices, paralleling a 1 µF capacitor is acceptable to suppress broader-frequency noise.
Does SN74AHCT1G126DCKR support 3.3 V input logic levels?
Yes, the SN74AHCT1G126DCKR supports 3.3 V input logic levels due to its TTL-compatible input thresholds: VIL ≤ 0.8 V (guaranteed low) and VIH ≥ 2.0 V (guaranteed high). A 3.3 V CMOS or LVTTL signal meets these conditions, enabling reliable 3.3 V-to-5 V up-translation without external level shifters - a key feature confirmed in TI's Application Information section.
What is the maximum output current rating for SN74AHCT1G126DCKR?
The SN74AHCT1G126DCKR is rated for ±8 mA output current per the Electrical Characteristics table under recommended operating conditions (VCC = 4.5–5.5 V, TA = –40 °C to +125 °C). Absolute maximum continuous output current is ±25 mA, but sustained operation above ±8 mA risks exceeding thermal limits in the SC-70 package without heatsinking.
Can SN74AHCT1G126DCKR be used in automotive applications?
The commercial-grade SN74AHCT1G126DCKR operates from –40 °C to +125 °C and meets AEC-Q100 stress test requirements for latch-up (JESD17) and ESD (HBM ±2000 V), but it is not officially qualified as automotive-grade. For production automotive use, TI recommends the pin-compatible SN74AHCT1G126-Q1, which undergoes full AEC-Q100 qualification including HTOL and temperature cycling.
How does the OE pin function on SN74AHCT1G126DCKR?
The OE (Output Enable) pin on SN74AHCT1G126DCKR is active-high: when OE = high, the device passes the A input signal to the Y output; when OE = low, Y enters a high-impedance (3-state) condition. TI recommends pulling OE to GND via a pulldown resistor during power-up to ensure bus isolation before system initialization - a requirement explicitly stated in the Functional Description section.
SN74AHCT1G126DCKR 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:
- 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
SN74AHCT1G126DCKR FAQ
1.How can I place an order for SN74AHCT1G126DCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHCT1G126DCKR 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 SN74AHCT1G126DCKR reliable?
The price and inventory of SN74AHCT1G126DCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHCT1G126DCKR is usually 5 days.
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SN74AHCT1G126DCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHCT1G126DCKR 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 SN74AHCT1G126DCKR?
For technical support, including SN74AHCT1G126DCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHCT1G126DCKR requirements.
6.How does Aetrix verify that SN74AHCT1G126DCKR is sourced from the original manufacturer or authorized distributors?
All SN74AHCT1G126DCKR 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 SN74AHCT1G126DCKR meets industry standards.
7.What is the process for return or replacement of SN74AHCT1G126DCKR?
All SN74AHCT1G126DCKR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHCT1G126DCKR, 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 SN74AHCT1G126DCKR part is unused and in its original packaging.
Return procedure for SN74AHCT1G126DCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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