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Texas Instruments SN74AHC1G126DRLR
- Part No.:
- SN74AHC1G126DRLR
- Manufacturer:
- Texas Instruments
- Package:
- SOT-553
- Datasheet:
-
SN74AHC1G126DRLR.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V SOT5
- Quantity:
- Payment:
- Shipping:
Inventory:6,335
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Product details
Overview
SN74AHC1G126DRLR from Texas Instruments is a single-channel 3-state bus buffer gate operating from 2 V to 5.5 V, delivering 6 ns max propagation delay at 5 V, ±8 mA output drive, and 10 µA max supply current. It functions as a unidirectional level-translating line driver in compact SOT-553 packaging for space-constrained digital interface applications.
For engineers reviewing the SN74AHC1G126DRLR datasheet, SN74AHC1G126DRLR pinout, SN74AHC1G126DRLR application, or SN74AHC1G126DRLR equivalent, key selection criteria include its 5-pin SOT-553 footprint, 3-state enable control timing (tPZH/tPHZ), 5.5-V-tolerant inputs, and thermal resistance of 328.7°C/W (RθJA) - critical for low-power embedded bus isolation and voltage-level translation.
Technical Context
The SN74AHC1G126DRLR implements a noninverting CMOS buffer with active-high output-enable (OE) logic: when OE = high, A passes to Y; when OE = low, Y enters high-impedance state. Its design supports down-translation - inputs accept up to 5.5 V regardless of VCC, enabling interfacing between higher-voltage legacy logic and lower-voltage microcontrollers.
It features balanced rise/fall times (Δt/Δv = 20 ns/V at 5 V), low dynamic power (Cpd = 14 pF), and latch-up immunity exceeding 250 mA per JESD17. The device operates across –40°C to +125°C and complies with JEDEC Level-1 moisture sensitivity (260°C peak reflow).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 5.5 V - enables direct operation from 3.3 V or 5 V rails and supports mixed-voltage system interfacing |
| Max Propagation Delay | 6 ns at VCC = 5 V, CL = 15 pF - ensures sub-10 ns timing margins for 50 MHz+ digital control buses |
| Output Drive Strength | ±8 mA at VCC = 5 V - sufficient to drive 50 pF loads with controlled edge rates, minimizing ringing on PCB traces |
| Input Voltage Tolerance | Up to 5.5 V independent of VCC - allows safe 5 V input signaling into 3.3 V or 2.5 V systems without external level shifters |
| Quiescent Supply Current | 10 µA max - supports ultra-low-power standby modes in battery-backed or energy-harvesting applications |
| Operating Temperature | –40°C to +125°C - qualified for industrial and automotive under-hood environments |
| ESD Rating (HBM) | ±1500 V - meets standard handling requirements for automated assembly and field-replaceable modules |
Pinout & Package
SOT-553 (DRL) package: 1.6 mm × 1.6 mm body size, 1.6 mm × 1.2 mm footprint, 0.6 mm nominal height, 5-pin surface-mount configuration with gull-wing leads.
| 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 ensure defined state |
| 2 - A | Data input | 5.5-V-tolerant CMOS input accepting logic levels independent of VCC; no external clamping required |
| 3 - GND | Ground reference | Primary return path for all internal logic and output current; requires low-inductance connection to system ground plane |
| 4 - Y | 3-state buffered output | Noninverting output with ±8 mA drive; enters high-impedance state when OE is low - enables bus sharing |
| 5 - VCC | Power supply | Supplies core logic and output stage; requires local 0.1 µF ceramic bypass capacitor placed within 2 mm |
Key Features
| Feature | Design Value |
|---|---|
| Wide supply range | 2 V to 5.5 V operation - eliminates need for separate voltage regulators in multi-rail systems |
| 5.5-V-tolerant inputs | Accepts 5 V signals at any valid VCC - enables seamless down-translation from legacy 5 V logic to modern low-voltage MCUs |
| Low dynamic power | 14 pF power dissipation capacitance - reduces switching current and EMI in high-frequency clock/data lines |
| Controlled edge rates | 20 ns/V input transition rate at 5 V - suppresses overshoot/undershoot on unterminated traces up to 10 cm |
| High-impedance fail-safe | OE pin defaults to disable state when floating - prevents bus contention during power sequencing if pulldown used |
Applications
| Industrial Motor Control Interface | Medical Patient Monitoring Bus Isolation |
|---|---|
Use Scenario: Isolating microcontroller GPIOs from noisy motor driver enable/control lines in compact PLC modules. IC Role / Device Role / Timing Role: Unidirectional 3-state buffer isolating MCU outputs from high-noise motor gate drivers while preserving signal integrity. Use Value: Prevents back-coupled noise from corrupting MCU logic states; 5.5-V-tolerant inputs accept 5 V PWM enable signals directly from legacy drivers. | Use Scenario: Enabling/disabling sensor data lines to an ADC in portable patient monitors with strict power budget constraints. IC Role / Device Role / Timing Role: Low-quiescent-current bus buffer enabling selective routing of analog front-end signals to shared ADC channels. Use Value: 10 µA max ICC extends battery life; 3-state output allows multiplexing multiple sensors onto one ADC input without hardware switches. |
| Retail Point-of-Sale Display Interface | Consumer TV HDMI CEC Signal Conditioning |
Use Scenario: Driving LED status indicators and small LCD segments from 3.3 V SoC GPIOs in compact POS terminals. IC Role / Device Role / Timing Role: Low-drive buffer translating SoC logic levels to discrete LED/analog display loads while limiting inrush current. Use Value: ±8 mA drive safely lights multiple LEDs; slow edge rates prevent EMI interference with nearby touch controllers or wireless modules. | Use Scenario: Buffering and conditioning CEC (Consumer Electronics Control) signals between HDMI source and sink devices in smart TVs. IC Role / Device Role / Timing Role: Bidirectional-capable 3-state buffer (used unidirectionally) ensuring clean CEC signal transmission across varying board stack-ups. Use Value: 6 ns max tPD meets CEC timing budgets; 125°C rating supports operation near heat-generating SoCs and power supplies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC1G126DRLR | Lower VCC range (1.65–5.5 V); 3.5 ns max tPD at 3.3 V; 24 mA drive; higher ICC (10 µA typical vs. 10 µA max) | Better suited for 1.8 V/3.3 V systems requiring faster edges and stronger drive; less ideal for 2 V operation or ultra-low-ICC standby | Select SN74LVC1G126DRLR when speed >6 ns and drive >8 mA are required; verify 1.65 V minimum VCC compatibility with host MCU. |
| SN74AHC1G125DRLR | Inverting logic function (A → Y̅); identical VCC range, timing, drive, and package; same thermal specs | Required where signal polarity inversion is needed in bus enable paths - e.g., active-low enable logic or inverted reset distribution | Choose SN74AHC1G125DRLR only when functional inversion is explicitly required; otherwise, SN74AHC1G126DRLR provides true-pass behavior with no logic change. |
Compared with SN74LVC1G126DRLR, the SN74AHC1G126DRLR offers guaranteed 2 V operation and lower max ICC, making it preferable for wide-input-voltage battery systems; versus SN74AHC1G125DRLR, it provides noninverting signal flow essential for transparent data gating without downstream logic adjustment.
Availability
SN74AHC1G126DRLR is available at Aetrix Electronics and suitable for industrial motor control, medical patient monitoring, retail point-of-sale terminals, and consumer TV subsystems requiring stable component supply and long-term production continuity.
Supply support for SN74AHC1G126DRLR 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 precision electronics.
The SN74AHC1G126DRLR belongs to TI's AHC logic family - designed for low-power, wide-supply-voltage digital interfacing in space-constrained industrial, medical, and consumer applications where reliability and signal integrity are critical.
FAQ
What is the maximum operating temperature for SN74AHC1G126DRLR?
The SN74AHC1G126DRLR is rated for continuous operation from –40°C to +125°C ambient temperature. This specification is validated per JEDEC JESD78 and applies to the SOT-553 (DRL) package under recommended operating conditions. Thermal derating is not required within this range when mounted per IPC-7351 guidelines and with adequate PCB copper area.
Does SN74AHC1G126DRLR support 5 V input signals when powered at 3.3 V?
Yes, SN74AHC1G126DRLR supports 5.5-V-tolerant inputs - meaning it accepts input voltages up to 5.5 V regardless of VCC level. When powered at 3.3 V, the A input can safely receive 5 V logic signals without damage or level-shifting circuitry, enabling direct interfacing between 5 V peripherals and 3.3 V microcontrollers.
What is the recommended bypass capacitor for SN74AHC1G126DRLR?
Texas Instruments recommends a 0.1 µF ceramic capacitor placed as close as possible to the VCC pin (Pin 5) of the SN74AHC1G126DRLR, with minimal trace length (<2 mm) and direct connection to the ground plane. This value is validated for noise suppression across the 2–5.5 V operating range and aligns with layout guidance in the official SCLS379N datasheet Section 8.3.
How does the output-enable (OE) pin behave during power-up?
The OE pin of SN74AHC1G126DRLR is not internally biased, so it may float during power-up, risking undefined output states. To ensure Y remains in high-impedance until firmware initializes OE, TI recommends connecting OE to GND via a pulldown resistor (e.g., 10 kΩ). This guarantees safe bus isolation at power-on and prevents contention in multi-driver systems.
Is SN74AHC1G126DRLR pin-compatible with other 5-pin logic buffers in SOT-553?
SN74AHC1G126DRLR uses the standard SOT-553 (DRL) 5-pin pinout (OE-A-GND-Y-VCC), matching TI's SN74AHC1G125DRLR and SN74LVC1G126DRLR. However, functional compatibility depends on logic type (inverting vs. noninverting) and electrical specs - always verify timing, drive strength, and voltage thresholds before substitution.
SN74AHC1G126DRLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHC
- Package/Case:
- SOT-553
- 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-5
SN74AHC1G126DRLR FAQ
1.How can I place an order for SN74AHC1G126DRLR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHC1G126DRLR 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 SN74AHC1G126DRLR reliable?
The price and inventory of SN74AHC1G126DRLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHC1G126DRLR is usually 5 days.
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Once your SN74AHC1G126DRLR 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 SN74AHC1G126DRLR?
For technical support, including SN74AHC1G126DRLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHC1G126DRLR requirements.
6.How does Aetrix verify that SN74AHC1G126DRLR is sourced from the original manufacturer or authorized distributors?
All SN74AHC1G126DRLR 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 SN74AHC1G126DRLR meets industry standards.
7.What is the process for return or replacement of SN74AHC1G126DRLR?
All SN74AHC1G126DRLR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHC1G126DRLR, 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 SN74AHC1G126DRLR part is unused and in its original packaging.
Return procedure for SN74AHC1G126DRLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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