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Texas Instruments 74AHC1G126DBVRG4
- Part No.:
- 74AHC1G126DBVRG4
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
74AHC1G126DBVRG4.pdf
- Description:
- IC BUF NON-INVERT 5.5V SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,083
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Product details
Overview
74AHC1G126DBVRG4 from Texas Instruments is a single-channel CMOS bus buffer gate with 3-state output, operating across 2 V to 5.5 V supply, 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 digital interface paths where bus isolation and low-power signal routing are required - e.g., between microcontroller GPIO and peripheral address/data lines.
For engineers reviewing the 74AHC1G126DBVRG4 datasheet, 74AHC1G126DBVRG4 pinout, 74AHC1G126DBVRG4 application, or 74AHC1G126DBVRG4 equivalent, this page delivers verified electrical specs, SOT-23 (DBV) package mapping, functional mode behavior, real-world use cases, and two validated alternative parts for design flexibility.
Technical Context
The 74AHC1G126DBVRG4 implements true (non-inverting) logic buffering with active-high output enable (OE), entering high-impedance state when OE = LOW. Its input structure supports 5.5 V tolerance regardless of VCC, enabling down-translation from higher-voltage domains into 3.3 V or 2.5 V logic systems.
It features balanced rise/fall times (20 ns/V at 5 V), low dynamic power consumption (14 pF typical Cpd), and robust ESD protection (±1500 V HBM). Thermal resistance is specified at RθJA = 278 °C/W for the DBV package, supporting operation from –40 °C to 85 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 5.5 V - supports mixed-voltage system interfacing and brown-out tolerant operation |
| Max Propagation Delay | 6 ns at VCC = 5 V, CL = 15 pF - enables reliable timing in sub-100 MHz digital control paths |
| Output Drive Strength | ±8 mA at VCC = 5 V - sufficient to drive multiple CMOS inputs or short PCB traces without external buffering |
| Input Voltage Tolerance | Up to 5.5 V independent of VCC - allows safe interfacing with 5 V logic while powered from 3.3 V or lower |
| Quiescent Supply Current | 10 µA max ICC - ensures negligible standby power impact in battery-backed or energy-sensitive designs |
| Operating Temperature | –40 °C to +85 °C - qualified for industrial-grade embedded applications including point-of-sale and motor control |
| ESD Rating (HBM) | ±1500 V - meets standard handling requirements without additional board-level protection |
Pinout & Package
SOT-23 (DBV) 5-pin surface-mount package: 2.9 mm × 2.8 mm footprint, 1.45 mm max height, JEDEC MO-178 compliant. Pin 1 marked via index area; tape-and-reel delivery (3000 pcs/reel, Q3 quadrant 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 data input | Accepts 5.5 V-tolerant signals; passes through to Y only when OE = HIGH |
| 3 - GND | Ground reference | Primary return path for logic and output current; must be low-inductance connection |
| 4 - Y | 3-state buffered output | Drives HIGH/LOW or floats (Z) based on OE; rated for ±25 mA continuous output current |
| 5 - VCC | Positive supply | Decoupling capacitor (0.1 µF ceramic) required adjacent to pin for stable switching performance |
Key Features
| Feature | Design Value |
|---|---|
| Wide supply range | 2 V to 5.5 V operation - eliminates need for separate voltage translators in multi-rail systems |
| 5.5 V-tolerant inputs | VI up to 5.5 V regardless of VCC - enables direct connection to legacy 5 V buses without level shifters |
| Low dynamic power | 14 pF typical Cpd - reduces switching current and heat generation in high-frequency toggle scenarios |
| Controlled edge rates | 20 ns/V input transition rate at 5 V - minimizes overshoot/undershoot and EMI on routed signals |
| Industrial temp grade | –40 °C to +85 °C operation - certified for deployment in commercial and industrial equipment |
Applications
| Projector Control Interface | Point-of-Sale Peripheral Bus |
|---|---|
Use Scenario: Isolating microcontroller I/O from display timing controller and lamp driver logic in compact projector modules. IC Role / Device Role / Timing Role: Single-channel bidirectional bus buffer enabling selective signal routing and preventing back-drive during hot-swap events. Use Value: Prevents contention on shared address/data lines while maintaining <6 ns timing margin for 25 MHz pixel clock synchronization. |
Use Scenario: Interfacing ARM-based payment terminal SoC with legacy 5 V RS-232 transceivers and barcode scanner modules. IC Role / Device Role / Timing Role: Level-translating buffer isolating 3.3 V host logic from 5 V peripheral signaling domains. Use Value: Eliminates external level-shifter ICs; 5.5 V-tolerant inputs tolerate 5 V UART signals directly at 3.3 V VCC. |
| Motor Control Logic Hub | Patient Monitoring Signal Routing |
Use Scenario: Managing enable/disable sequencing of multiple stepper motor drivers in compact industrial motion controllers. IC Role / Device Role / Timing Role: Output-enable gated buffer controlling power-stage enable lines under MCU supervision. Use Value: Ensures all drivers enter safe high-Z state during reset or fault conditions via synchronized OE assertion. |
Use Scenario: Routing sensor data streams (ECG, SpO₂) between analog front-end ASICs and low-power microcontrollers in portable medical devices. IC Role / Device Role / Timing Role: Low-noise, low-power signal isolator minimizing crosstalk between sensitive analog and noisy digital sections. Use Value: 10 µA max ICC preserves battery life; controlled edge rates reduce coupling into adjacent analog traces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC1G126DBVR | Lower VCC range (1.65–5.5 V); 3.3 V optimized; 5 V-tolerant inputs retained | Better suited for 1.8 V/3.3 V-only systems; slightly faster (5.5 ns @ 3.3 V) but less robust at 2 V | Select when primary supply is 3.3 V and 2 V operation is not required |
| 74AUP1G126GW,125 | NXP variant; ultra-low power (500 nA ICC); slower (10.5 ns @ 3.3 V); same 5 V-tolerant inputs | Optimized for always-on, battery-powered nodes; trade-off is reduced speed and narrower VCC (0.8–3.6 V) | Choose for energy-constrained IoT endpoints where microamp quiescent current outweighs speed needs |
Compared with 74AHC1G126DBVRG4, SN74LVC1G126DBVR offers tighter 3.3 V timing but sacrifices 2 V compatibility, while 74AUP1G126GW,125 achieves nanoamp standby at the cost of speed and supply range - making the original optimal for wide-voltage industrial interfaces requiring both robustness and responsiveness.
Availability
74AHC1G126DBVRG4 is available at Aetrix Electronics and suitable for projector control interfaces, point-of-sale peripheral buses, and motor control logic hubs requiring stable component supply, full traceability, and long-term industrial lifecycle support.
Supply support for 74AHC1G126DBVRG4 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 50 years of innovation in high-reliability interface and power management ICs.
The SN74AHC1G126 belongs to TI's advanced AHC logic family, designed specifically for low-power, wide-supply-voltage digital interfacing in industrial, computing, and consumer electronics where signal integrity and voltage translation are critical.
FAQ
What is the function of the OE pin on the 74AHC1G126DBVRG4?
The OE (output enable) pin on the 74AHC1G126DBVRG4 is an active-high control input that determines whether the Y output drives the A input signal (OE = HIGH) or enters high-impedance state (OE = LOW). During power-up, TI recommends tying OE to GND via a pulldown resistor to ensure default isolation - a key safety measure confirmed in the 74AHC1G126DBVRG4 functional modes table.
Does the 74AHC1G126DBVRG4 support 5 V logic inputs when powered from 3.3 V?
Yes - the 74AHC1G126DBVRG4 features 5.5 V-tolerant inputs, meaning it accepts VI up to 5.5 V regardless of VCC setting. When powered from 3.3 V, it safely buffers 5 V signals from legacy peripherals without damage or level-shifting circuitry, a capability explicitly verified in Section 7.3 Feature Description and Table 5.3 Recommended Operating Conditions.
What is the maximum output current rating for the 74AHC1G126DBVRG4?
The 74AHC1G126DBVRG4 supports ±25 mA continuous output current per Y pin (absolute maximum), with recommended operating limits of ±8 mA at 5 V and ±4 mA at 3.3 V per the Electrical Characteristics table. Exceeding these values risks thermal overstress or latch-up, as defined in Absolute Maximum Ratings Section 5.1.
Can the 74AHC1G126DBVRG4 operate at 2 V supply voltage?
Yes - the 74AHC1G126DBVRG4 is fully specified from 2 V to 5.5 V, with guaranteed functionality including 6 ns max tPD at 5 V and 9.5 ns max tPD at 2 V (per switching characteristics tables). Its wide VCC range makes it uniquely suitable for battery-powered or brown-out resilient designs where supply may dip near 2 V.
Is the 74AHC1G126DBVRG4 RoHS compliant and lead-free?
Yes - the 74AHC1G126DBVRG4 carries "Yes" for RoHS compliance in TI's official Package Option Addendum, with NIPDAU (nickel-palladium-gold) lead finish and MSL Level-1 rating. This confirms full exemption from lead-based solder requirements and suitability for modern lead-free reflow processes up to 260 °C peak temperature.
74AHC1G126DBVRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHC
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- 2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
74AHC1G126DBVRG4 FAQ
1.How can I place an order for 74AHC1G126DBVRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHC1G126DBVRG4 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 74AHC1G126DBVRG4 reliable?
The price and inventory of 74AHC1G126DBVRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHC1G126DBVRG4 is usually 5 days.
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Once your 74AHC1G126DBVRG4 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 74AHC1G126DBVRG4?
For technical support, including 74AHC1G126DBVRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHC1G126DBVRG4 requirements.
6.How does Aetrix verify that 74AHC1G126DBVRG4 is sourced from the original manufacturer or authorized distributors?
All 74AHC1G126DBVRG4 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 74AHC1G126DBVRG4 meets industry standards.
7.What is the process for return or replacement of 74AHC1G126DBVRG4?
All 74AHC1G126DBVRG4 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHC1G126DBVRG4, 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 74AHC1G126DBVRG4 part is unused and in its original packaging.
Return procedure for 74AHC1G126DBVRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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