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Texas Instruments 74LVC2G125DCURG4
- Part No.:
- 74LVC2G125DCURG4
- Manufacturer:
- Texas Instruments
- Package:
- 8-VFSOP (0.091", 2.30mm Width)
- Datasheet:
-
74LVC2G125DCURG4.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V 8VSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
74LVC2G125DCURG4 from Texas Instruments is a dual 3-state noninverting bus buffer IC designed for 1.65-V to 5.5-V operation, featuring two independent buffers with active-low output-enable controls (1OE, 2OE), ±24-mA output drive at 3.3 V, 4.3-ns max propagation delay at 3.3 V, and Ioff support for live insertion and partial-power-down applications. It is used in high-speed data acquisition systems and SSD internal signal routing.
For engineers reviewing the 74LVC2G125DCURG4 datasheet, 74LVC2G125DCURG4 pinout, 74LVC2G125DCURG4 application, or 74LVC2G125DCURG4 equivalent, key selection considerations include its VSSOP-8 package footprint, 5.5-V tolerant inputs enabling level translation down to VCC, guaranteed 3-state isolation during power sequencing, and compatibility with industrial temperature range (–40°C to +125°C) designs.
Technical Context
The 74LVC2G125DCURG4 implements two independent noninverting buffer gates (Y = A), each controlled by a dedicated active-low output-enable input. Its Ioff circuitry ensures outputs enter high-impedance state when VCC = 0 V, preventing back-drive current in powered-down subsystems.
It uses standard CMOS inputs with 3.5-pF typical input capacitance and balanced push-pull outputs capable of sourcing/sinking up to ±24 mA at 3.3 V. Input voltage tolerance extends to 5.5 V regardless of VCC, enabling use as a down-translator in mixed-voltage interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 5.5 V - supports single-supply operation across 1.8-V, 2.5-V, 3.3-V, and 5-V logic domains |
| Max Propagation Delay | 4.3 ns at VCC = 3.3 V - enables reliable operation in >100-MHz digital signal paths |
| Output Drive | ±24 mA at VCC = 3.3 V - sufficient to drive multiple CMOS loads or moderate PCB traces without external buffering |
| Input Voltage Tolerance | Up to 5.5 V - allows interfacing with higher-voltage controllers while operating at lower VCC (e.g., 3.3 V) |
| Ioff Leakage | ±10 µA max - ensures safe hot-plug and partial-power-down behavior without damaging current flow |
| ESD Rating | 2000-V HBM, 1000-V CDM - meets industrial handling requirements without additional protection circuitry |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive, industrial motor control, and telecom infrastructure |
Pinout & Package
VSSOP-8 package (2.30 mm × 2.00 mm), ultra-thin profile, lead-free, RoHS-compliant, moisture sensitivity level 1 (MSL-1, unlimited floor life at ≤30°C/60% RH).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Positive supply - must be bypassed with 0.1-µF capacitor placed adjacent to pin |
| 2 | 1A | Buffer 1 input - accepts 0–5.5 V signals; CMOS-compatible with 3.5-pF input capacitance |
| 3 | 1Y | Buffer 1 output - 3-state (high/low/high-Z); drives ±24 mA at 3.3 V |
| 4 | GND | Ground reference - low-inductance return path required for signal integrity |
| 5 | 2A | Buffer 2 input - electrically identical to 1A; supports independent signal routing |
| 6 | 2Y | Buffer 2 output - independently controlled 3-state output; matches 1Y electrical specs |
| 7 | 2OE | Active-low enable for buffer 2 - pulled high via resistor during power-up to ensure default high-Z state |
| 8 | 1OE | Active-low enable for buffer 1 - tied to VCC through pullup resistor to prevent floating during sequencing |
Key Features
| Feature | Design Value |
|---|---|
| 5.5-V tolerant inputs | Enables level translation from 5-V microcontrollers to 3.3-V FPGAs without external resistors or translators |
| Ioff partial-power-down | Prevents back-current flow when VCC = 0 V - critical for hot-swap modules and modular backplanes |
| NanoFree™ packaging | Dies serve as packages - eliminates bond wires and mold compound, reducing parasitic inductance and improving thermal resistance (RθJA = 217.8°C/W) |
| Low ICC (10 µA max) | Minimizes quiescent power in always-on subsystems such as sensor interface monitors or watchdog circuits |
| Guaranteed 3-state isolation | IOZ ≤ 10 µA at 3.6 V - ensures no signal leakage between enabled and disabled channels in multiplexed buses |
Applications
| Cable Modem Termination Systems | High-Speed Data Acquisition |
|---|---|
Use Scenario: Isolating upstream/downstream data paths in DOCSIS 3.1+ CMTS line cards where multiple PHY layers share common backplane traces. IC Role / Device Role / Timing Role: Dual 3-state buffer managing bidirectional signal routing between analog front-end and digital baseband ASICs. Use Value: 5.5-V tolerant inputs accept legacy 5-V ADC/DAC control lines; ±24-mA drive maintains signal integrity over 10-cm FR4 traces at 100 MHz. | Use Scenario: Buffering parallel LVCMOS outputs from multi-channel ADCs before FPGA capture, especially in oscilloscopes and spectrum analyzers. IC Role / Device Role / Timing Role: Signal conditioning and bus isolation element ensuring clean sampling clock domain crossing and channel-to-channel isolation. Use Value: 4.3-ns tpd guarantees sub-1-ns timing skew across both channels; Ioff prevents data corruption during ADC power cycling. |
| SSD Internal Signal Routing | Military Radar Signal Processing |
Use Scenario: Enabling/disabling communication between NAND flash controller and DRAM cache in enterprise NVMe SSDs during power-state transitions. IC Role / Device Role / Timing Role: Power-aware bus gate controlling data flow between volatile and nonvolatile memory domains. Use Value: MSL-1 rating and –40°C to +125°C qualification support reflow and operation in thermally constrained SSD modules; Ioff eliminates latch-up risk during partial sleep modes. | Use Scenario: Interfacing high-speed ADCs and DACs in phased-array radar front-ends where EMI resilience and thermal stability are mission-critical. IC Role / Device Role / Timing Role: Robust signal repeater isolating sensitive RF sampling chains from noisy digital processing units. Use Value: 2000-V HBM ESD rating withstands field-deployed handling; 125°C operation sustains reliability in sealed radar enclosures without forced cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC2G125DCUR | Same silicon, identical electrical specs, identical VSSOP-8 package; differs only in tape-and-reel packaging and RoHS marking (no G4 suffix) | No functional difference; suitable for same PCB layouts and firmware | Select when RoHS compliance documentation or specific reel orientation is not required |
| 74LVC2G126DCUR | Inverting output logic (Y = NOT A); otherwise identical pinout, drive strength, timing, and voltage specs | Requires logic inversion in downstream logic or software; unsuitable where signal polarity must be preserved | Choose only if system-level signal inversion is acceptable or already compensated |
Compared with SN74LVC2G125DCUR and 74LVC2G126DCUR, the 74LVC2G125DCURG4 provides identical performance and layout compatibility but includes TI's G4-grade RoHS certification and traceable lot marking-critical for aerospace and medical OEMs requiring full material declarations.
Availability
74LVC2G125DCURG4 is available at Aetrix Electronics and suitable for cable modem termination systems, high-speed data acquisition, and SSD internal signal routing requiring stable component supply, long-term lifecycle assurance, and full RoHS/REACH compliance.
Supply support for 74LVC2G125DCURG4 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 SN74LVC2G125 family targets space-constrained, mixed-voltage digital interfaces in industrial, communications, and computing systems-designed specifically for robust 3-state bus control with level translation and partial-power-down safety.
FAQ
What is the maximum operating frequency supported by the 74LVC2G125DCURG4?
The 74LVC2G125DCURG4 does not specify a hard maximum clock frequency, but its 4.3-ns propagation delay at 3.3 V supports reliable operation in digital signal paths up to 100 MHz. System-level timing depends on load capacitance, trace length, and drive strength; for 50-pF loads, edge rates remain monotonic below 80 MHz. Always verify setup/hold margins using actual board parasitics-not just datasheet tpd values-when designing for >50-MHz operation.
Can the 74LVC2G125DCURG4 be used to translate 5-V signals to a 3.3-V system?
Yes, the 74LVC2G125DCURG4 supports true down-translation: its inputs tolerate up to 5.5 V regardless of VCC, so a 5-V input applied while VCC = 3.3 V produces a valid 3.3-V output. This eliminates external voltage dividers or level shifters. However, outputs cannot exceed VCC, and the device does not translate in the opposite direction (3.3-V in → 5-V out). The 74LVC2G125DCURG4 must be powered at the target output voltage.
Does the 74LVC2G125DCURG4 require external pull-up resistors on its OE pins?
Yes-TI recommends tying both 1OE and 2OE to VCC via a pull-up resistor to ensure high-impedance outputs during power-up/power-down. The minimum resistor value depends on the driver's sink capability; for typical use, a 10-kΩ resistor suffices. Without this, OE may float, causing unintended output activation and bus contention. The 74LVC2G125DCURG4 itself does not integrate internal pull-ups.
Is the 74LVC2G125DCURG4 pin-compatible with other members of the SN74LVC2Gxx family?
No-the 74LVC2G125DCURG4 shares the VSSOP-8 footprint with SN74LVC2G126 (inverting) and SN74LVC2G240 (dual inverting buffer with 2-bit bus hold), but it is not pin-compatible with SN74LVC2G00 (dual NAND) or SN74LVC2G08 (dual AND) due to differing logic functions and pin assignments. Always verify pin functions using the official TI pin diagram-not package outline-before substitution.
What thermal derating applies to the 74LVC2G125DCURG4 at 125°C ambient?
At TA = 125°C, the 74LVC2G125DCURG4's RθJA = 217.8°C/W requires strict power budgeting: total dissipation must stay below ~115 mW to keep junction temperature ≤150°C. With ICC ≤ 10 µA and switching losses negligible at low frequencies, derating mainly affects high-speed operation. For 100-MHz toggling into 50-pF loads, calculate dynamic power (Cpd × VCC² × f) using Cpd = 20 pF (typical) and limit duty cycle or reduce VCC if TJ exceeds 135°C.
74LVC2G125DCURG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 8-VFSOP (0.091", 2.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 2
- 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:
- 8-VSSOP
74LVC2G125DCURG4 FAQ
1.How can I place an order for 74LVC2G125DCURG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVC2G125DCURG4 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 74LVC2G125DCURG4 reliable?
The price and inventory of 74LVC2G125DCURG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVC2G125DCURG4 is usually 5 days.
3.What payment methods are accepted for 74LVC2G125DCURG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVC2G125DCURG4 transactions.
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4.How is shipping managed for 74LVC2G125DCURG4?
74LVC2G125DCURG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVC2G125DCURG4 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 74LVC2G125DCURG4?
For technical support, including 74LVC2G125DCURG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVC2G125DCURG4 requirements.
6.How does Aetrix verify that 74LVC2G125DCURG4 is sourced from the original manufacturer or authorized distributors?
All 74LVC2G125DCURG4 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 74LVC2G125DCURG4 meets industry standards.
7.What is the process for return or replacement of 74LVC2G125DCURG4?
All 74LVC2G125DCURG4 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVC2G125DCURG4, 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 74LVC2G125DCURG4 part is unused and in its original packaging.
Return procedure for 74LVC2G125DCURG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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