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Texas Instruments SN74AHC1G126DBVR
- Part No.:
- SN74AHC1G126DBVR
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
SN74AHC1G126DBVR.pdf
- Description:
- IC BUF NON-INVERT 5.5V SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:10,029
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Product details
Overview
SN74AHC1G126DBVR from Texas Instruments is a single-channel CMOS bus buffer gate with 3-state output, designed for bidirectional data isolation and level translation in low-power digital systems. It operates from 2 V to 5.5 V, delivers ±8 mA output drive at 5 V, achieves 6 ns max propagation delay at 5 V, and features 10 µA max supply current - enabling use in portable projectors, patient monitoring interfaces, and industrial server backplanes.
For engineers reviewing the SN74AHC1G126DBVR datasheet, SN74AHC1G126DBVR pinout, SN74AHC1G126DBVR application, or SN74AHC1G126DBVR equivalent, key selection criteria include its 5-pin SOT-23 (DBV) package, 3-state enable control logic, 5.5-V-tolerant inputs, and guaranteed operation across –40°C to +125°C.
Technical Context
The SN74AHC1G126DBVR implements true noninverting buffering with active-high output-enable (OE) control: when OE = high, A → Y passes data; when OE = low, Y enters high-impedance state. Its CMOS design ensures rail-to-rail input voltage tolerance up to 5.5 V independent of VCC, supporting down-translation from 5-V logic to 3.3-V or 2.5-V domains.
Switching performance is characterized across two load conditions (15 pF and 50 pF) and two supply rails (3.3 V ±0.3 V and 5 V ±0.5 V), with propagation delays tightly specified over full temperature range (–40°C to +125°C). Input transition rate limits (100 ns/V at 3.3 V, 20 ns/V at 5 V) ensure controlled edge rates to minimize EMI and output ringing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 5.5 V - supports mixed-voltage system interfacing and brownout resilience |
| Max Propagation Delay | 6 ns at VCC = 5 V, CL = 15 pF - enables timing-critical signal routing in high-speed digital backplanes |
| Output Drive Strength | ±8 mA at VCC = 5 V - sufficient to drive 50-pF loads with <10 ns edges while limiting overshoot |
| Input Voltage Tolerance | Up to 5.5 V regardless of VCC - allows safe interfacing with higher-voltage logic without external level shifters |
| Quiescent Supply Current | 10 µA max - critical for battery-powered medical devices and always-on subsystems |
| Operating Temperature | –40°C to +125°C - qualified for automotive under-hood, industrial motor control, and telecom infrastructure |
| ESD Rating (HBM) | ±1500 V - meets IEC 61000-4-2 Level 2 for robust handling in manufacturing and field service |
Pinout & Package
SOT-23 (DBV) 5-pin plastic package: 2.9 mm × 2.8 mm footprint, 1.45 mm max height, gull-wing leads, JEDEC MO-178 compliant. Pin 1 index located at top-left corner with molded dot; tape-and-reel packaging (3000 pcs/reel, Q3 quadrant orientation).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OE | Active-high output enable input | Drives Y into high-Z when low; must be pulled low via resistor during power-up to prevent bus contention |
| 2 - A | Buffer input | True logic input accepting 0–5.5 V; no internal pull-up/down; requires external bias if unused |
| 3 - GND | Ground reference | Primary return path for all internal logic and output currents; must be low-inductance connection |
| 4 - Y | 3-state buffered output | Noninverting replica of A when OE = high; high-impedance when OE = low; rated for ±25 mA continuous sink/source |
| 5 - VCC | Power supply | Single supply rail (2–5.5 V); requires local 0.1 µF ceramic bypass capacitor placed ≤2 mm from pin |
Key Features
| Feature | Design Value |
|---|---|
| Wide supply voltage range | 2 V to 5.5 V operation enables interoperability across legacy 5-V and modern low-voltage logic families |
| 5.5-V-tolerant inputs | Inputs withstand 5.5 V even at VCC = 2 V - eliminates need for external level translators in mixed-supply systems |
| Controlled edge rates | Input transition rate limit (20 ns/V at 5 V) suppresses high-frequency harmonics and reduces EMI emissions |
| Low dynamic power | 14 pF typical power dissipation capacitance (Cpd) minimizes switching current and heat generation at 1 MHz |
| High noise immunity | VIH/VIL thresholds scale with VCC (e.g., VIH = 3.85 V at VCC = 5.5 V), ensuring >30% noise margin across full voltage range |
Applications
| Projector Interface | Patient Monitoring Bus |
|---|---|
Use Scenario: Isolating HDMI CEC or DDC control lines between main SoC and display panel controller in ultra-thin projectors. IC Role / Device Role / Timing Role: Bidirectional 3-state buffer enabling shared I²C-like bus arbitration without contention. Use Value: 5.5-V-tolerant inputs accept panel-side 5-V signals while operating from 3.3-V SoC rail; 6 ns delay preserves timing margins in 100-kHz control protocols. | Use Scenario: Multiplexing sensor data streams (ECG, SpO₂, NIBP) onto a common serial bus inside compact bedside monitors. IC Role / Device Role / Timing Role: Low-power bus driver enabling selective sensor activation and isolation to reduce standby current. Use Value: 10 µA max ICC extends battery life; –40°C to +125°C rating covers clinical environments and internal thermal stress during sterilization cycles. |
| Industrial Server Backplane | Motor Control Logic Interface |
Use Scenario: Driving status LEDs and fault indicators on hot-swap server blades where multiple boards share a common indicator bus. IC Role / Device Role / Timing Role: Output-enable-controlled buffer preventing LED ghosting during board insertion/removal sequences. Use Value: ±8 mA drive reliably lights standard 20-mA LEDs; high-Z state eliminates current leakage paths during hot-swap events. | Use Scenario: Interfacing microcontroller GPIOs to isolated gate drivers in brushless DC motor inverters. IC Role / Device Role / Timing Role: Signal-level translator and noise filter between MCU logic and high-noise power stage domains. Use Value: Controlled 20 ns/V input slew rate reduces coupling into sensitive analog feedback paths; 1500-V HBM ESD rating withstands factory handling and field maintenance. |
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; 3.7 ns max tPD at 3.3 V | Better suited for 3.3-V-only systems; not recommended for 2-V operation | Select when primary supply is fixed at 3.3 V and sub-6 ns delay is required |
| 74AUP1G126GW,518 | NXP variant; 0.8–3.6 V range; 1.8 µA ICC; 12 ns tPD at 3.3 V | Ultra-low power focus; slower speed; incompatible 5-V operation | Prefer for energy-constrained IoT nodes where 10 µA ICC is excessive |
Compared with SN74LVC1G126DBVR and 74AUP1G126GW,518, the SN74AHC1G126DBVR uniquely balances wide-voltage flexibility (2–5.5 V), moderate speed (6 ns), and low quiescent current (10 µA), making it optimal for mixed-supply industrial and medical designs requiring guaranteed operation across extended temperature ranges.
Availability
SN74AHC1G126DBVR is available at Aetrix Electronics and suitable for projector interfaces, patient monitoring buses, and industrial server backplanes requiring stable component supply across extended temperature and voltage ranges.
Supply support for SN74AHC1G126DBVR 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 delivering analog and embedded processing solutions, with over 90 years of innovation in precision analog, power management, and logic ICs.
The SN74AHC1G126DBVR belongs to TI's AHC logic family - engineered for low-power, wide-supply-voltage operation in space-constrained industrial, medical, and consumer electronics where reliability across temperature extremes is mandatory.
FAQ
What is the maximum output current rating for the SN74AHC1G126DBVR?
The SN74AHC1G126DBVR supports ±25 mA continuous output current per pin and ±50 mA total channel current through VCC or GND. Its rated output drive is ±8 mA at 5 V under switching conditions - sufficient for driving standard LEDs, logic inputs, or 50-pF transmission lines without external buffers. Exceeding ±25 mA risks latch-up or thermal damage.
Does the SN74AHC1G126DBVR support level translation between different supply voltages?
Yes, the SN74AHC1G126DBVR supports down-translation: its inputs tolerate up to 5.5 V regardless of VCC, allowing a 5-V signal source to safely drive the A input while VCC is set to 3.3 V or 2.5 V. However, it does not support up-translation - the output Y cannot exceed VCC, so it cannot generate 5-V logic levels from a 3.3-V supply.
How should the OE pin be handled during power-up to avoid bus contention?
To ensure the SN74AHC1G126DBVR output remains in high-impedance during power-up, tie OE to GND via a pulldown resistor. TI specifies the minimum resistor value based on the driver's current-sourcing capability; a 10-kΩ resistor is commonly used. Leaving OE floating risks undefined output states and potential contention on shared buses.
What is the thermal resistance (RθJA) of the SN74AHC1G126DBVR in its SOT-23 package?
The SN74AHC1G126DBVR in the DBV (SOT-23) package has a junction-to-ambient thermal resistance (RθJA) of 278°C/W under standard JEDEC test conditions. This value assumes a 1-inch² copper pad on a 1-layer board; actual thermal performance improves significantly with PCB copper area, thermal vias, and airflow - critical for sustained operation at 125°C ambient.
Is the SN74AHC1G126DBVR suitable for automotive applications?
The standard SN74AHC1G126DBVR is not AEC-Q100 qualified. For automotive use, TI offers the pin-compatible SN74AHC1G126-Q1 variant, which undergoes extended temperature testing (–40°C to +125°C), enhanced ESD robustness, and failure analysis per automotive reliability standards. Use SN74AHC1G126-Q1 in infotainment, ADAS, or body control modules.
SN74AHC1G126DBVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHC
- Package/Case:
- SC-74A, SOT-753
- 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:
- 2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
SN74AHC1G126DBVR FAQ
1.How can I place an order for SN74AHC1G126DBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHC1G126DBVR 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 SN74AHC1G126DBVR reliable?
The price and inventory of SN74AHC1G126DBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHC1G126DBVR is usually 5 days.
3.What payment methods are accepted for SN74AHC1G126DBVR?
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4.How is shipping managed for SN74AHC1G126DBVR?
SN74AHC1G126DBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHC1G126DBVR 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 SN74AHC1G126DBVR?
For technical support, including SN74AHC1G126DBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHC1G126DBVR requirements.
6.How does Aetrix verify that SN74AHC1G126DBVR is sourced from the original manufacturer or authorized distributors?
All SN74AHC1G126DBVR 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 SN74AHC1G126DBVR meets industry standards.
7.What is the process for return or replacement of SN74AHC1G126DBVR?
All SN74AHC1G126DBVR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHC1G126DBVR, 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 SN74AHC1G126DBVR part is unused and in its original packaging.
Return procedure for SN74AHC1G126DBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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