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Texas Instruments 74AHCT1G126DBVTG4
- Part No.:
- 74AHCT1G126DBVTG4
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
74AHCT1G126DBVTG4.pdf
- Description:
- IC BUF NON-INVERT 5.5V SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,047
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Product details
Overview
74AHCT1G126DBVTG4 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 supply current. It serves as a level-translating line driver in compact digital interface paths where controlled bus contention and low-power 3-state control are required.
For engineers reviewing the 74AHCT1G126DBVTG4 datasheet, 74AHCT1G126DBVTG4 pinout, 74AHCT1G126DBVTG4 application, or 74AHCT1G126DBVTG4 equivalent, this device is selected for 5 V logic buffering with precise enable-controlled high-impedance outputs, slow-edge behavior to suppress ringing, and compatibility with 3.3 V-to-5 V up-translation in space-constrained industrial and automotive subsystems.
Technical Context
The 74AHCT1G126DBVTG4 implements a true non-inverting buffer with active-high output-enable (OE) control: when OE is high, A passes directly to Y; when OE is low, Y enters high-impedance state. Its TTL-compatible input thresholds (VIL = 0.8 V, VIH = 2.0 V) enable reliable interfacing with legacy 3.3 V CMOS or LVTTL sources.
Designed for robust operation across –40°C to +125°C, it features latch-up immunity exceeding 250 mA per JESD17, ESD protection of ±2000 V HBM and ±1000 V CDM, and thermal resistance RθJA = 278°C/W in its SOT-23 (DBV) package - enabling use in thermally demanding motor control and ADAS modules without external heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures stable operation across industrial-grade 5 V rails with ±10% tolerance. |
| Max Propagation Delay | 6 ns at 5 V - supports timing-critical data paths up to ~160 MHz toggle rate in buffered interfaces. |
| Output Drive | ±8 mA at 5 V - sufficient to drive standard 50 Ω transmission lines or multiple 74-series inputs without signal degradation. |
| Input Compatibility | TTL-voltage compatible (VIL ≤ 0.8 V, VIH ≥ 2.0 V) - enables direct connection to 3.3 V microcontrollers and FPGAs without level shifters. |
| Quiescent Current | 10 µA max ICC - minimizes standby power in always-on subsystems such as sensor hubs or safety monitors. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive, industrial motor drives, and server backplane applications. |
| ESD Rating | ±2000 V HBM - meets IEC 61000-4-2 Level 2 requirements for board-level handling robustness. |
Pinout & Package
SOT-23 (DBV) 5-pin plastic package: 2.9 mm × 2.8 mm footprint, 1.45 mm max height, gull-wing leads, RoHS-compliant NiPdAu finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OE | Active-high output enable | Drives Y into high-Z when low; must be pulled down via resistor during power-up to prevent bus contention. |
| 2 - A | True logic input | Accepts TTL/CMOS signals; threshold optimized for 3.3 V logic driving 5 V bus. |
| 3 - GND | Ground reference | Primary return path for all internal logic and output current; requires low-inductance PCB connection. |
| 4 - Y | 3-state buffered output | Delivers true A signal when OE high; presents >10⁶ Ω impedance when OE low - isolates downstream loads. |
| 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 transition | Controlled dV/dt reduces overshoot/undershoot on unterminated traces - eliminates need for series termination in short-reach interconnects. |
| 3-state output with OE polarity | Active-high OE simplifies control logic integration with microcontroller GPIOs and avoids inversion gates in enable routing. |
| TTL-compatible input thresholds | VIH = 2.0 V minimum allows reliable recognition of 3.3 V logic highs without external biasing or voltage dividers. |
| Low dynamic power consumption | Cpd = 14 pF - limits switching current to <100 µA at 1 MHz, critical for battery-backed or thermally isolated modules. |
| Latch-up immunity | Exceeds 250 mA per JESD17 - prevents destructive failure during transient overvoltage events in motor drive feedback loops. |
Applications
| AC Induction Motor Control | DLP Front Projection Systems |
|---|---|
Use Scenario: Isolating microcontroller GPIOs from high-noise gate driver ICs in variable-frequency drives. IC Role / Device Role / Timing Role: 3-state buffer providing noise-immune signal conditioning between MCU PWM outputs and isolated half-bridge drivers. Use Value: Prevents bus contention during fault shutdown by forcing high-Z output; slow edges suppress EMI coupling into adjacent analog video circuits. | Use Scenario: Routing timing-critical pixel clock and data enable signals from FPGA to DMD controller ASIC. IC Role / Device Role / Timing Role: Low-skew, low-jitter buffer ensuring clean edge integrity across 10+ cm PCB traces in high-resolution light engine modules. Use Value: 6 ns tPD and ±8 mA drive maintain signal fidelity at 100+ MHz pixel rates while minimizing reflections on unterminated microstrip lines. |
| Server Motherboard Management | Advanced Driver Assistance Systems |
Use Scenario: Enabling/disabling SMBus or I²C pull-up networks during hot-swap events in redundant power modules. IC Role / Device Role / Timing Role: Bidirectional bus isolation gate controlled by baseboard management controller (BMC) GPIO. Use Value: High-Z state blocks leakage current paths during insertion/removal; TTL-compatible inputs accept BMC's 3.3 V logic levels directly. | Use Scenario: Interfacing radar processor outputs to CAN transceiver enable pins in multi-sensor fusion ECUs. IC Role / Device Role / Timing Role: Level-shifting and enable-gated signal repeater between 3.3 V radar SoC and 5 V automotive bus infrastructure. Use Value: 2.0 V VIH ensures robust detection of radar chip's weak-drive logic highs; –40°C to +125°C rating matches under-hood ambient requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AHCT1G125DBVRG4 | Inverting buffer (A → Y̅), identical electrical specs and package. | Requires logic inversion in signal path; unsuitable where polarity must be preserved. | Select only if system design accommodates inverted enable or data polarity - otherwise risk functional mismatch. |
| 74LVC1G126GW,125 | Lower VCC range (1.65–5.5 V), higher speed (4.1 ns typ), but only ±24 mA drive and no guaranteed TTL input compatibility. | Better for mixed-voltage 1.8/3.3 V systems; less robust for legacy 5 V TTL source interfacing. | Prefer for new 3.3 V designs with tight timing budgets; avoid when interfacing 3.3 V outputs with marginal VIH margins. |
Compared with SN74AHCT1G125DBVRG4, the 74AHCT1G126DBVTG4 preserves signal polarity essential for enable/control lines; compared with 74LVC1G126GW,125, it guarantees TTL input recognition critical in brown-field 5 V systems - making it the sole choice for backward-compatible industrial upgrades.
Availability
74AHCT1G126DBVTG4 is available at Aetrix Electronics and suitable for AC induction motor controls, DLP projection systems, server motherboard management, and advanced driver assistance systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74AHCT1G126DBVTG4 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 solutions, with over 90 years of innovation in high-reliability components.
The SN74AHCT1G126 belongs to TI's industry-standard 74AHCT logic family, engineered for robust 5 V digital interfacing in automotive, industrial, and computing applications where noise immunity, wide temperature operation, and legacy compatibility are mandatory.
FAQ
What is the function of the OE pin on the 74AHCT1G126DBVTG4?
The OE (output enable) pin on the 74AHCT1G126DBVTG4 is an active-high control input that determines the output state: when OE is high, the A input is passed unaltered to Y; when OE is low, Y enters high-impedance (3-state) mode. This allows bidirectional bus sharing and prevents signal contention. For safe power-up, TI recommends tying OE to GND via a pulldown resistor - a design requirement explicitly documented for the 74AHCT1G126DBVTG4 in Section 7.1 of its datasheet.
Does the 74AHCT1G126DBVTG4 support 3.3 V logic inputs?
Yes, the 74AHCT1G126DBVTG4 supports 3.3 V logic inputs due to its TTL-compatible input thresholds: VIH is specified at 2.0 V min and VIL at 0.8 V max over the full temperature range. This allows reliable detection of 3.3 V CMOS logic highs and lows without external level shifting - a key feature confirmed in Section 5.3 and Section 7.3 of the official 74AHCT1G126DBVTG4 datasheet.
What is the maximum operating temperature for the 74AHCT1G126DBVTG4?
The 74AHCT1G126DBVTG4 is rated for continuous operation from –40°C to +125°C, as specified in Section 5.3 (Recommended Operating Conditions) of its datasheet. This extended temperature range is validated for the SOT-23 (DBV) package variant and makes the 74AHCT1G126DBVTG4 suitable for under-hood automotive applications, industrial motor drives, and high-density server environments where thermal margins are constrained.
Can the 74AHCT1G126DBVTG4 be used in place of the SN74AHCT1G126DBVRG4?
The 74AHCT1G126DBVTG4 and SN74AHCT1G126DBVRG4 share identical electrical specifications, pinout, and package (SOT-23 DBV), but differ in packaging format: DBVTG4 is supplied in tape-and-reel with smaller quantity per reel (250 units), while DBVRG4 uses large tape-and-reel (3000 units). Functionally, they are interchangeable - however, the 74AHCT1G126DBVTG4 is marked as Obsolete in TI's official packaging addendum, so long-term design-in should prioritize active variants like DBVRG4 or DBVRE4.
What is the typical power dissipation capacitance (Cpd) of the 74AHCT1G126DBVTG4?
The typical power dissipation capacitance (Cpd) of the 74AHCT1G126DBVTG4 is 14 pF, measured at VCC = 5 V and f = 1 MHz with no load (Section 5.7). This parameter directly determines dynamic power consumption during switching: P = Cpd × VCC² × f. At 10 MHz, for example, the 74AHCT1G126DBVTG4 dissipates approximately 3.5 mW - a value critical for thermal budgeting in sealed enclosures or fanless industrial controllers.
74AHCT1G126DBVTG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHCT
- Package/Case:
- SC-74A, SOT-753
- 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:
- SOT-23-5
74AHCT1G126DBVTG4 FAQ
1.How can I place an order for 74AHCT1G126DBVTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHCT1G126DBVTG4 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 74AHCT1G126DBVTG4 reliable?
The price and inventory of 74AHCT1G126DBVTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHCT1G126DBVTG4 is usually 5 days.
3.What payment methods are accepted for 74AHCT1G126DBVTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHCT1G126DBVTG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AHCT1G126DBVTG4?
74AHCT1G126DBVTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHCT1G126DBVTG4 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 74AHCT1G126DBVTG4?
For technical support, including 74AHCT1G126DBVTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHCT1G126DBVTG4 requirements.
6.How does Aetrix verify that 74AHCT1G126DBVTG4 is sourced from the original manufacturer or authorized distributors?
All 74AHCT1G126DBVTG4 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 74AHCT1G126DBVTG4 meets industry standards.
7.What is the process for return or replacement of 74AHCT1G126DBVTG4?
All 74AHCT1G126DBVTG4 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHCT1G126DBVTG4, 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 74AHCT1G126DBVTG4 part is unused and in its original packaging.
Return procedure for 74AHCT1G126DBVTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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