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Texas Instruments 74AHCT1G126DBVRE4
- Part No.:
- 74AHCT1G126DBVRE4
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
74AHCT1G126DBVRE4.pdf
- Description:
- IC BUF NON-INVERT 5.5V SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,764
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Product details
Overview
74AHCT1G126DBVRE4 from Texas Instruments is a single-channel 3-state bus buffer gate with TTL-compatible inputs, operating at 4.5–5.5 V, delivering ±8 mA output drive, 6 ns max propagation delay at 5 V, 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-power tri-state isolation are required.
For engineers reviewing the 74AHCT1G126DBVRE4 datasheet, 74AHCT1G126DBVRE4 pinout, 74AHCT1G126DBVRE4 application, or 74AHCT1G126DBVRE4 equivalent, this device is selected for 5 V logic buffering with precise OE-controlled high-impedance state, TTL input compatibility, and minimal output ringing in motor control and server motherboard signal routing.
Technical Context
The 74AHCT1G126DBVRE4 implements a true non-inverting buffer with active-high output enable (OE), enabling data pass-through from A to Y only when OE is high; otherwise, Y enters high-impedance state. Its TTL-compatible input thresholds (VIL = 0.8 V, VIH = 2.0 V) support reliable interfacing with legacy 3.3 V logic driving into 5 V systems.
Designed for CMOS operation with balanced rise/fall times, it features slow edge rates to suppress output ringing under light loads, and includes latch-up immunity exceeding 250 mA per JESD17. Thermal resistance RθJA is 278 °C/W in its SOT-23 (DBV) package, supporting operation from –40 °C to 125 °C.
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 - enables timing-critical bus buffering in sub-100 MHz digital interfaces. |
| Output Drive | ±8 mA at 5 V - sufficient to drive standard 50 Ω transmission lines or multiple 74-series inputs without external buffers. |
| Input Compatibility | TTL voltage levels (VIL ≤ 0.8 V, VIH ≥ 2.0 V) - allows direct connection to 3.3 V microcontrollers and FPGAs without level shifters. |
| Quiescent Current | 10 µA max ICC - supports low-power standby modes in always-on embedded systems. |
| Operating Temperature | –40 °C to +125 °C - qualified for automotive under-hood and industrial motor control environments. |
| ESD Rating | ±2000 V HBM - meets IEC 61000-4-2 Level 2 for board-level robustness in handling and assembly. |
Pinout & Package
SOT-23 (DBV) 5-pin plastic package: 2.9 mm × 2.8 mm footprint, 1.45 mm max height, lead pitch 0.95 mm, RoHS-compliant NiPdAu finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OE | Active-high output enable input | Drives Y to high-Z when low; ties to GND via pulldown resistor for power-up safety. |
| 2 - A | Buffer input | Accepts TTL-compatible signals; true logic level passed to Y when OE is high. |
| 3 - GND | Ground reference | Return path for all internal circuitry and output current; must be low-impedance. |
| 4 - Y | 3-state buffered output | Provides inverted-logic-free output; high-Z state prevents bus contention in shared-data applications. |
| 5 - VCC | Positive supply | Requires local 0.1 µF ceramic bypass capacitor placed within 2 mm of pin for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Slow edge rate control | Reduces output ringing and EMI on PCB traces, critical for clean signal integrity in graphics card and ADAS sensor interfaces. |
| TTL-input compatibility | Enables seamless 3.3 V → 5 V up-translation without external level shifters in mixed-voltage server motherboards. |
| High-impedance output state | Prevents bus contention in multi-driver configurations such as motor drive control buses and DLP projection data lanes. |
| Latch-up immunity | Exceeds 250 mA per JESD17 - ensures reliability during transient overvoltage events in industrial motor controls. |
| Low dynamic power | 14 pF typical power dissipation capacitance (Cpd) - minimizes switching current in high-frequency clock distribution paths. |
Applications
| Motor Control Interface | Server Board Signal Isolation |
|---|---|
Use Scenario: Isolating microcontroller GPIOs from high-noise PWM gate drivers in AC induction motor inverters. IC Role / Device Role / Timing Role: 3-state buffer providing OE-gated signal routing between MCU and half-bridge gate drivers. Use Value: Prevents backfeed during fault conditions; ±8 mA drive sustains logic levels across long PCB traces in noisy motor enclosures. | Use Scenario: Enabling/disabling peripheral address/data lines on enterprise server motherboards during hot-plug events. IC Role / Device Role / Timing Role: Bus buffer with fast 6 ns tPLH/tPHL ensuring timing compliance in DDR4 memory subsystem control paths. Use Value: High-impedance state eliminates signal contention during PCIe slot reconfiguration; TTL inputs interface directly with 3.3 V BMC controllers. |
| DLP Projection Data Lanes | ADAS Sensor Signal Conditioning |
Use Scenario: Driving parallel video data buses from FPGA to DMD controller in front-projection systems. IC Role / Device Role / Timing Role: Single-channel line driver with controlled edge rates to minimize skew and overshoot on 20+ cm FR4 traces. Use Value: Slow edges suppress ringing that would distort pixel timing; 125 °C rating supports sealed optical engine thermal environments. | Use Scenario: Buffering radar/LiDAR sensor outputs before ADC sampling in advanced driver assistance ECUs. IC Role / Device Role / Timing Role: Signal isolator with OE-synchronized sampling windows to avoid metastability during sensor frame capture. Use Value: 10 µA ICC enables always-on wake-up monitoring; ±2000 V HBM protects against ESD in vehicle assembly and field service. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AHCT1G125DBVRE4 | Inverting buffer (A → Y̅); identical voltage, speed, drive, and package. | Required where logic inversion is acceptable or needed in signal chain. | Select when system-level timing or polarity constraints mandate inverted output behavior. |
| 74LVC1G126GV,125 | 3.3 V only (1.65–5.5 V), lower VIL/VIH (0.7/1.7 V), 3.7 ns tPD at 3.3 V. | Better suited for 3.3 V-native systems; not drop-in for 5 V-only designs. | Choose for mixed-voltage domains with tighter noise margins and faster switching below 5 V. |
Compared with SN74AHCT1G125DBVRE4, the 74AHCT1G126DBVRE4 provides non-inverting functionality essential for transparent data routing; versus 74LVC1G126GV,125, it guarantees full 5 V operation and TTL compatibility but trades off some speed and voltage flexibility.
Availability
74AHCT1G126DBVRE4 is available at Aetrix Electronics and suitable for motor control interfaces, server motherboard signal isolation, DLP projection data lanes, and ADAS sensor conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74AHCT1G126DBVRE4 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 markets.
The SN74AHCT1G126 belongs to TI's advanced high-speed CMOS logic family, engineered for robust 5 V bus interfacing with TTL compatibility, low power, and high noise immunity in mission-critical embedded systems.
FAQ
What is the function of Pin 1 (OE) on the 74AHCT1G126DBVRE4?
Pin 1 is the active-high output enable (OE) input. When OE is high, the device passes the A input signal to the Y output; when OE is low, Y enters high-impedance state. For safe power-up, TI recommends tying OE to GND via a pulldown resistor. This behavior is explicitly defined in the Function Table (Table 7-1) of the 74AHCT1G126DBVRE4 datasheet.
Does the 74AHCT1G126DBVRE4 support 3.3 V input logic levels?
Yes - the 74AHCT1G126DBVRE4 has TTL-compatible inputs with VIL ≤ 0.8 V and VIH ≥ 2.0 V, allowing reliable recognition of 3.3 V logic highs and lows when powered at 5 V. This enables direct 3.3 V-to-5 V up-translation without external level shifters, as confirmed in Section 7.3 and Table 5.3 of the 74AHCT1G126DBVRE4 datasheet.
What is the maximum output current rating for the 74AHCT1G126DBVRE4?
The 74AHCT1G126DBVRE4 supports ±8 mA DC output current per pin (IOL/IOH) under recommended operating conditions, with absolute maximum continuous output current rated at ±25 mA. Total device current (VCC/GND) must not exceed ±50 mA. These values are specified in Sections 5.3 and 5.5 of the official 74AHCT1G126DBVRE4 datasheet.
Is the 74AHCT1G126DBVRE4 suitable for automotive applications?
The 74AHCT1G126DBVRE4 is not AEC-Q200 qualified; however, TI offers the pin-compatible automotive-grade variant SN74AHCT1G126-Q1, which is qualified for high-reliability automotive use. The 74AHCT1G126DBVRE4 operates from –40 °C to +125 °C and meets industrial requirements, but lacks automotive-specific qualification testing and documentation per the 74AHCT1G126DBVRE4 product folder.
What package type does the 74AHCT1G126DBVRE4 use, and what are its key mechanical dimensions?
The 74AHCT1G126DBVRE4 uses the SOT-23 (DBV) package: 5-pin, 2.9 mm × 2.8 mm body size, 1.45 mm max height, 0.95 mm lead pitch. It features NiPdAu lead finish, MSL Level-1 rating, and RoHS compliance - all verified in TI's PACKAGE OPTION ADDENDUM for 74AHCT1G126DBVRE4.
74AHCT1G126DBVRE4 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
74AHCT1G126DBVRE4 FAQ
1.How can I place an order for 74AHCT1G126DBVRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHCT1G126DBVRE4 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 74AHCT1G126DBVRE4 reliable?
The price and inventory of 74AHCT1G126DBVRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHCT1G126DBVRE4 is usually 5 days.
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4.How is shipping managed for 74AHCT1G126DBVRE4?
74AHCT1G126DBVRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHCT1G126DBVRE4 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 74AHCT1G126DBVRE4?
For technical support, including 74AHCT1G126DBVRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHCT1G126DBVRE4 requirements.
6.How does Aetrix verify that 74AHCT1G126DBVRE4 is sourced from the original manufacturer or authorized distributors?
All 74AHCT1G126DBVRE4 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 74AHCT1G126DBVRE4 meets industry standards.
7.What is the process for return or replacement of 74AHCT1G126DBVRE4?
All 74AHCT1G126DBVRE4 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHCT1G126DBVRE4, 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 74AHCT1G126DBVRE4 part is unused and in its original packaging.
Return procedure for 74AHCT1G126DBVRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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