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Texas Instruments 74LVC1G126DCKRG4
- Part No.:
- 74LVC1G126DCKRG4
- Manufacturer:
- Texas Instruments
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
74LVC1G126DCKRG4.pdf
- Description:
- IC BUF NON-INVERT 5.5V SC70-5
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
74LVC1G126DCKRG4 from Texas Instruments is a single non-inverting bus buffer gate with 3-state output, designed for level translation and bidirectional bus isolation in low-voltage digital systems. It operates from 1.65V to 5.5V VCC, accepts inputs up to 5.5V, delivers ±24mA drive at 3.3V, achieves 3.7ns max propagation delay at 3.3V, and supports Ioff for live insertion - used in high-speed data acquisition, video infrastructure, and motor control interfaces.
For engineers reviewing the 74LVC1G126DCKRG4 datasheet, 74LVC1G126DCKRG4 pinout, 74LVC1G126DCKRG4 application, or 74LVC1G126DCKRG4 equivalent, key selection criteria include its 3-state enable timing (ten/tdis ≤ 5.5ns), overvoltage-tolerant inputs, NanoFree™ SC70-5 package footprint, and compatibility with mixed-voltage signal routing in compact embedded designs.
Technical Context
The 74LVC1G126DCKRG4 implements a CMOS-based non-inverting buffer with active-high output-enable (OE) control. Its logic function passes A to Y when OE = HIGH and places Y in high-impedance state when OE = LOW - enabling time-multiplexed bus sharing and signal gating without contention.
It features balanced CMOS 3-state outputs capable of sourcing/sinking symmetric current (±24mA at 3.3V), Ioff protection that disables all outputs at 0V VCC, and overvoltage-tolerant inputs rated to 5.5V independent of VCC - allowing safe interfacing between 1.8V, 2.5V, 3.3V, and 5V domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V to 5.5V - supports mixed-supply system integration and legacy 5V interface compatibility |
| Input Voltage Max | 5.5V - enables overvoltage-tolerant input operation above VCC, critical for level translation |
| tpd (max) | 3.7ns at 3.3V, CL = 15pF - ensures sub-4ns signal path delay for high-speed data routing |
| IOH/IOL | ±24mA at 3.3V - provides robust drive strength for fanout into multiple CMOS loads or moderate capacitive traces |
| Ioff | ±10μA max - guarantees safe partial-power-down operation during hot-swap or power sequencing |
| ICC (max) | 10μA - enables ultra-low static power in battery-backed or always-on monitoring circuits |
| Operating Temp | –40°C to +125°C - qualified for industrial and automotive under-hood environments |
Pinout & Package
74LVC1G126DCKRG4 is packaged in the Texas Instruments NanoFree™ SC70-5 (DCK) package: 2.0mm × 2.1mm body size, 5-pin surface-mount, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - GND | Ground reference | Primary return path for supply and signal currents; must be low-impedance for noise immunity |
| 2 - A | Data input | Non-inverting logic input accepting 0–5.5V; requires termination if unused (to VCC or GND) |
| 3 - Y | 3-state output | True-buffered output; high-impedance when OE = LOW; drives HIGH/LOW when OE = HIGH |
| 4 - OE | Output-enable control | Active-HIGH enable; must be pulled LOW at power-up to prevent bus contention |
| 5 - VCC | Power supply | Core supply rail (1.65–5.5V); requires local 0.1μF bypass capacitor adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| Overvoltage-tolerant inputs | Accepts up to 5.5V regardless of VCC - enables direct connection to 5V logic without external level shifters |
| Ioff partial-power-down | Outputs fully disabled at 0V VCC - prevents back-driving and current leakage during hot-insertion or power sequencing |
| NanoFree™ SC70-5 package | 2.0mm × 2.1mm footprint - saves PCB area in space-constrained portable and modular electronics |
| Low ICC (10μA max) | Minimizes quiescent current in always-on subsystems such as wake-on-event controllers or sensor hubs |
| ESD robustness | 2000V HBM / 1000V CDM - meets industrial handling requirements without additional protection circuitry |
Applications
| Video Broadcasting Infrastructure | Industrial Motor Control |
|---|---|
|
Use Scenario: Signal routing between FPGA video processing cores and multi-format encoder ICs operating at different voltage rails (1.8V, 3.3V, 5V). IC Role / Device Role / Timing Role: Level-translating bus buffer isolating clock/data paths during format switching; 3-state enables dynamic bus arbitration. Use Value: Eliminates need for discrete level shifters while maintaining <3.7ns propagation delay for pixel-clock-aligned timing. |
Use Scenario: Interfacing microcontroller GPIOs to isolated gate drivers in high-voltage motor inverters with shared control bus architecture. IC Role / Device Role / Timing Role: Bidirectional bus buffer with OE-controlled directionality; suppresses cross-talk during PWM dead-time intervals. Use Value: ±24mA drive sustains signal integrity across noisy 24V DC bus environments; Ioff prevents latch-up during power cycling. |
| High-Speed Data Acquisition | Cable Modem Termination Systems |
|
Use Scenario: Conditioning parallel ADC output lines before multiplexing into a high-throughput FPGA interface. IC Role / Device Role / Timing Role: Single-channel buffer providing clean, slew-controlled signals with precise 3-state disable timing (ten ≤ 5.5ns). Use Value: Sub-4ns tpd preserves sampling window fidelity; low 4pF input capacitance minimizes loading on fast-switching ADC outputs. |
Use Scenario: Isolating DOCSIS PHY layer control signals (reset, interrupt, configuration) between SoC and RF front-end ICs. IC Role / Device Role / Timing Role: Low-power 3-state buffer enabling shared control bus among multiple RF components with staggered initialization. Use Value: 10μA ICC reduces standby power in always-on cable modems; –40°C to +125°C rating ensures field reliability in outdoor plant cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC1G125DCKRG4 | Inverting buffer (A → NOT-Y); identical electrical specs, package, and timing | Requires logic inversion in signal path; unsuitable where polarity must be preserved | Select only when system-level inversion is acceptable or required for signal conditioning |
| 74LVC1G126DBVR | SOT-23-5 (DBV) package: 2.9mm × 2.8mm vs. DCK's 2.0mm × 2.1mm - 3.3× larger footprint | Same functionality but incompatible land pattern; not drop-in for space-constrained layouts | Choose DBVR only when thermal dissipation >234°C/W is needed or SOT-23 assembly is preferred |
Compared with SN74LVC1G125DCKRG4, the 74LVC1G126DCKRG4 preserves signal polarity essential for timing-critical control paths; compared with 74LVC1G126DBVR, it delivers 45% smaller PCB area and improved high-frequency signal integrity due to reduced parasitic inductance in the SC70 package.
Availability
74LVC1G126DCKRG4 is available at Aetrix Electronics and suitable for high-speed data acquisition, video broadcasting infrastructure, and industrial motor control applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for 74LVC1G126DCKRG4 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 decades of expertise in high-reliability industrial and automotive-grade components.
The SN74LVC1G126 series belongs to TI's LVC (Low-Voltage CMOS) logic family, engineered for low-power, high-speed signal routing in mixed-voltage digital systems - particularly targeting space- and power-constrained embedded interfaces.
FAQ
What is the maximum input voltage tolerance for 74LVC1G126DCKRG4?
The 74LVC1G126DCKRG4 supports input voltages up to 5.5V regardless of VCC level - a feature known as overvoltage-tolerant inputs. This allows safe interfacing with higher-voltage logic families (e.g., 5V TTL) even when powered from 1.8V or 2.5V supplies. The specification is validated per TI's SCES224S datasheet Section 5.3 and applies directly to the 74LVC1G126DCKRG4 variant in SC70-5 packaging.
Does 74LVC1G126DCKRG4 support partial power-down operation?
Yes, the 74LVC1G126DCKRG4 includes Ioff circuitry that disables all outputs when VCC = 0V, limiting leakage to ±10μA maximum. This enables live insertion and hot-swap capability in modular systems. The behavior is explicitly specified in Section 7.3.2 of the official datasheet and confirmed for the DCK package variant - critical for backplane and pluggable module designs where power sequencing is uncontrolled.
What is the propagation delay of 74LVC1G126DCKRG4 at 3.3V supply?
At VCC = 3.3V and CL = 15pF, the maximum propagation delay (tpd) of 74LVC1G126DCKRG4 is 3.7ns, with typical value of 0.6ns. This is measured from A to Y under recommended operating conditions (–40°C to 85°C) and is guaranteed across temperature and voltage ranges per Table 5.6 in the SCES224S datasheet. The value applies specifically to the DCK package and is unaffected by SC70-5 mechanical construction.
Can 74LVC1G126DCKRG4 drive a 50pF load while meeting timing specs?
Yes - the 74LVC1G126DCKRG4 is characterized for loads up to 50pF in switching specifications (Sections 5.7 and 5.8), with verified tpd, ten, and tdis values at CL = 30pF and CL = 50pF. At 3.3V and –40°C to 85°C, tpd remains ≤4.5ns and ten ≤5.3ns under 50pF loading. TI explicitly states in Section 8.2.1.1 that "the SN74LVC1G126 can drive a load with a total capacitance less than or equal to 50pF while still meeting all of the data sheet specifications."
Is the 74LVC1G126DCKRG4 pinout compatible with other SC70-5 logic buffers?
The 74LVC1G126DCKRG4 uses the standard SC70-5 pinout defined by TI: Pin 1 = GND, Pin 2 = A, Pin 3 = Y, Pin 4 = OE, Pin 5 = VCC. This matches TI's SN74LVC1G125DCKRG4 and SN74LVC1G07DCKRG4, enabling layout reuse across non-inverting, inverting, and open-drain variants - provided the functional requirement (e.g., 3-state vs. push-pull) aligns. Mechanical drawings confirm identical pad geometry and solder mask clearance.
74LVC1G126DCKRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- 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:
- 32mA, 32mA
- Voltage - Supply:
- 1.65V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
74LVC1G126DCKRG4 FAQ
1.How can I place an order for 74LVC1G126DCKRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVC1G126DCKRG4 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 74LVC1G126DCKRG4 reliable?
The price and inventory of 74LVC1G126DCKRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVC1G126DCKRG4 is usually 5 days.
3.What payment methods are accepted for 74LVC1G126DCKRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVC1G126DCKRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVC1G126DCKRG4?
74LVC1G126DCKRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVC1G126DCKRG4 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 74LVC1G126DCKRG4?
For technical support, including 74LVC1G126DCKRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVC1G126DCKRG4 requirements.
6.How does Aetrix verify that 74LVC1G126DCKRG4 is sourced from the original manufacturer or authorized distributors?
All 74LVC1G126DCKRG4 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 74LVC1G126DCKRG4 meets industry standards.
7.What is the process for return or replacement of 74LVC1G126DCKRG4?
All 74LVC1G126DCKRG4 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVC1G126DCKRG4, 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 74LVC1G126DCKRG4 part is unused and in its original packaging.
Return procedure for 74LVC1G126DCKRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74LVC1G126DCKRG4 Tags
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