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Texas Instruments 74LVC1G126DCKTG4
- Part No.:
- 74LVC1G126DCKTG4
- Manufacturer:
- Texas Instruments
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
74LVC1G126DCKTG4.pdf
- Description:
- IC BUF NON-INVERT 5.5V SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,898
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Product details
Overview
74LVC1G126DCKTG4 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 in partial-power-down systems.
For engineers reviewing the 74LVC1G126DCKTG4 datasheet, 74LVC1G126DCKTG4 pinout, 74LVC1G126DCKTG4 application, or 74LVC1G126DCKTG4 equivalent, this page provides verified functional identity, SC70-5 package mapping, confirmed 3-state enable logic, real-world timing and drive specs, and two validated alternative parts for bus buffering in industrial and communications hardware.
Technical Context
The 74LVC1G126DCKTG4 implements a CMOS-based non-inverting buffer with active-high output-enable (OE) control. Its 3-state output transitions between driving high, driving low, and high-impedance states-enabling shared-bus arbitration without contention. The device features over-voltage tolerant inputs (up to 5.5V) and supports down-translation to VCC, allowing interfacing between 5V logic and lower-voltage domains.
It integrates Ioff circuitry that disables all outputs when VCC = 0V, preventing back-drive current during hot-swap or power sequencing. Input transition rate compliance (≤10 ns/V at 3.3V) ensures stable operation, while balanced CMOS output structure enables symmetrical rise/fall times and robust noise immunity in signal routing applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V to 5.5V - Enables interoperability across 1.8V, 2.5V, 3.3V, and 5V logic families. |
| Max Propagation Delay | 3.7ns at 3.3V, CL = 15pF - Supports >200MHz data rates in point-to-point buffering paths. |
| Output Drive | ±24mA at 3.3V - Sustains fast edge rates into 50pF loads without external termination. |
| Ioff Leakage | ±10μA max - Prevents current flow during power-off, enabling safe live insertion in modular systems. |
| Input Voltage Tolerance | Up to 5.5V - Allows direct connection to 5V sources without level-shifting circuitry. |
| ESD Rating | 2000V HBM - Meets industrial-grade ESD robustness requirements per ANSI/ESDA/JEDEC JS-001. |
| Operating Temperature | –40°C to +125°C - Qualified for under-hood automotive, motor control, and industrial ambient environments. |
Pinout & Package
74LVC126DCKTG4 is housed in a 5-pin SC70 (DCK) package measuring 2.0mm × 2.1mm with 1.25mm body width. Pin 1 is A (data input), Pin 2 is GND, Pin 3 is Y (3-state output), Pin 4 is OE (active-high output enable), and Pin 5 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A | Data input | True logic input; passes through to Y when OE is high; high-impedance when OE is low. |
| GND | Ground reference | Return path for all internal currents; must be low-impedance to maintain noise margin and switching integrity. |
| Y | 3-state output | Drives high/low when enabled; floats to high-impedance state when OE is low - essential for bus sharing. |
| OE | Output-enable control | Active-high signal; ties Y to high-Z when low - used for bus arbitration, power sequencing, or signal gating. |
| VCC | Supply voltage | Primary power rail; sets logic thresholds and output voltage levels; requires local 0.1μF bypass capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Over-voltage tolerant inputs | Accepts 0–5.5V signals regardless of VCC setting - eliminates need for external level shifters when interfacing legacy 5V peripherals. |
| Ioff partial-power-down protection | Blocks current flow between powered and unpowered sections - critical for hot-pluggable modules and modular backplanes. |
| Low ICC static current | 10μA max at full temperature range - reduces quiescent power in always-on subsystems like sensor interfaces or standby controllers. |
| Fast 3.7ns tpd at 3.3V | Enables clean signal integrity in high-speed clock distribution, data strobing, and FPGA I/O expansion paths. |
| CMOS balanced output drive | ±24mA capability with matched rise/fall characteristics - minimizes skew in differential signaling chains and timing-critical paths. |
Applications
| Cable Modem Termination | High-Speed Data Acquisition |
|---|---|
Use Scenario: Isolating upstream/downstream data paths between analog front-end and digital baseband processor in DOCSIS-compliant cable modems. IC Role / Device Role / Timing Role: 3-state bus buffer controlling bidirectional data flow on shared memory-mapped interface; OE synchronized to packet framing boundaries. Use Value: Prevents bus contention during channel switching; leverages Ioff to isolate unpowered RF sections during sleep mode. |
Use Scenario: Buffering parallel ADC output lines before FPGA capture in test equipment requiring sub-10ns timing resolution. IC Role / Device Role / Timing Role: Non-inverting signal conditioner with precise propagation delay matching across channels; enables deterministic sampling alignment. Use Value: 3.7ns max tpd and <1ns skew ensure consistent setup/hold margins across 8-bit parallel bus; ±24mA drive sustains signal integrity into FPGA IBUFDS inputs. |
| Military Radar Signal Processing | Motor Control Interface |
Use Scenario: Level-translating control signals between radiation-hardened microcontrollers (5V) and FPGA-based beamforming engines (3.3V) in airborne radar subsystems. IC Role / Device Role / Timing Role: Voltage-tolerant bus buffer enabling seamless inter-family communication; OE used for fault-isolation during self-test sequences. Use Value: 5.5V input tolerance avoids discrete resistor-divider networks; –40°C to +125°C rating supports wide ambient operation in avionics enclosures. |
Use Scenario: Isolating PWM command signals from MCU to gate drivers in high-voltage motor inverters, where ground potential differences exist between control and power stages. IC Role / Device Role / Timing Role: 3-state isolator decoupling logic domain from noisy power stage; OE tied to system enable for fail-safe shutdown. Use Value: Ioff prevents back-driving during power loss; ±24mA drive ensures reliable gate turn-on despite PCB trace inductance and layout parasitics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC1G125DCKR | Inverting logic function (A → NOT Y); identical pinout, timing, and electrical specs otherwise. | Requires logic inversion in signal path - suitable only where polarity flip is acceptable or compensated in firmware. | Select when system-level signal polarity allows inversion; no PCB change needed due to pin compatibility. |
| NC7SZ126P5X | Same function and pinout; slightly higher max tpd (4.5ns at 3.3V); lower drive (±24mA at 3.3V same, but derates faster above 3.3V). | Valid for cost-sensitive consumer designs with relaxed timing margins; not recommended for >150MHz data paths. | Choose for price-sensitive industrial controls where 3.7ns vs. 4.5ns delay has no impact on system timing budget. |
Compared with SN74LVC1G125DCKR, 74LVC1G126DCKTG4 preserves signal polarity - critical for synchronous data buses. Against NC7SZ126P5X, it delivers tighter propagation delay control and superior thermal stability across –40°C to +125°C, making it preferred for mission-critical timing paths.
Availability
74LVC1G126DCKTG4 is available at Aetrix Electronics and suitable for industrial motor control, military radar signal conditioning, high-speed data acquisition systems, and cable modem termination requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74LVC1G126DCKTG4 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 for industrial, automotive, and communications markets.
The SN74LVC1G126 series was developed to deliver compact, low-power, voltage-flexible bus buffering for space-constrained digital interfaces - targeting applications demanding level translation, bus isolation, and hot-swap resilience.
FAQ
What is the function of the OE pin on the 74LVC1G126DCKTG4?
The OE (output-enable) pin on the 74LVC1G126DCKTG4 is an active-high control input that determines whether the Y output drives the A input signal or enters high-impedance state. When OE is high, Y mirrors A; when OE is low, Y disconnects electrically from the bus. This behavior enables time-multiplexed bus sharing and safe power sequencing - a core requirement in the 74LVC1G126DCKTG4's design for modular digital systems.
Can the 74LVC1G126DCKTG4 operate with a 1.8V supply and accept 3.3V inputs?
Yes, the 74LVC1G126DCKTG4 supports 1.8V VCC operation while accepting input voltages up to 5.5V - including 3.3V signals - without damage or level-shifting circuitry. This down-translation capability is explicitly specified in its Recommended Operating Conditions and Electrical Characteristics tables, making the 74LVC1G126DCKTG4 ideal for interfacing mixed-voltage domains in modern low-power embedded systems.
Does the 74LVC1G126DCKTG4 support hot-plug or live-insertion scenarios?
Yes, the 74LVC1G126DCKTG4 incorporates Ioff circuitry that disables all outputs when VCC = 0V, preventing back-drive current and latch-up during live insertion. This feature is validated per JESD78 Class II latch-up testing (>100mA) and is explicitly documented in the datasheet's Feature and Electrical Characteristics sections - confirming the 74LVC1G126DCKTG4's suitability for modular backplanes and field-replaceable units.
What is the maximum capacitive load the 74LVC1G126DCKTG4 can drive while maintaining timing specs?
The 74LVC1G126DCKTG4 is characterized for CL = 15pF (timing specs) and CL = 30–50pF (switching specs). TI specifies reliable operation up to 50pF while meeting all published tpd, ten, and tdis limits across –40°C to +125°C. For loads exceeding 50pF, a series damping resistor is recommended - a design constraint clearly stated in the 74LVC1G126DCKTG4's Application and Implementation section.
Is the 74LVC1G126DCKTG4 pin-compatible with other SC70-5 logic buffers?
Yes, the 74LVC1G126DCKTG4 uses the industry-standard SC70-5 (DCK) footprint and shares identical pin assignments (A-GND-Y-OE-VCC) with functionally similar devices like SN74LVC1G125DCKR and NC7SZ126P5X. This mechanical and electrical pin compatibility enables drop-in substitution in existing layouts - a key advantage confirmed by TI's Mechanical, Packaging, and Orderable Information documentation for the 74LVC1G126DCKTG4.
74LVC1G126DCKTG4 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
74LVC1G126DCKTG4 FAQ
1.How can I place an order for 74LVC1G126DCKTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVC1G126DCKTG4 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 74LVC1G126DCKTG4 reliable?
The price and inventory of 74LVC1G126DCKTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVC1G126DCKTG4 is usually 5 days.
3.What payment methods are accepted for 74LVC1G126DCKTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVC1G126DCKTG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVC1G126DCKTG4?
74LVC1G126DCKTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVC1G126DCKTG4 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 74LVC1G126DCKTG4?
For technical support, including 74LVC1G126DCKTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVC1G126DCKTG4 requirements.
6.How does Aetrix verify that 74LVC1G126DCKTG4 is sourced from the original manufacturer or authorized distributors?
All 74LVC1G126DCKTG4 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 74LVC1G126DCKTG4 meets industry standards.
7.What is the process for return or replacement of 74LVC1G126DCKTG4?
All 74LVC1G126DCKTG4 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVC1G126DCKTG4, 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 74LVC1G126DCKTG4 part is unused and in its original packaging.
Return procedure for 74LVC1G126DCKTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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