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Texas Instruments 74LVC1G125DCKTG4
- Part No.:
- 74LVC1G125DCKTG4
- Manufacturer:
- Texas Instruments
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
74LVC1G125DCKTG4.pdf
- Description:
- IC BUFF NON-INVERT 5.5V SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,416
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Product details
Overview
74LVC1G125DCKTG4 from Texas Instruments is a single 3-state non-inverting bus buffer gate in SC-70 (DCK) package, supporting 1.65–5.5V VCC operation, 3.7ns max propagation delay at 3.3V, ±24mA output drive, and over-voltage tolerant inputs up to 5.5V. It serves as a level-translating isolation buffer in high-speed digital interface paths.
For engineers reviewing the 74LVC1G125DCKTG4 datasheet, 74LVC1G125DCKTG4 pinout, 74LVC1G125DCKTG4 application, or 74LVC1G125DCKTG4 equivalent, key selection criteria include 3-state control timing (ten/tdis), Ioff-enabled live insertion support, thermal performance in SC-70 (RθJA = 371°C/W), and compatibility with mixed-voltage 3.3V/5V system buses.
Technical Context
The 74LVC1G125DCKTG4 implements a CMOS-based non-inverting buffer with active-low 3-state enable (OE), where Y = A when OE = L and Y = high-impedance when OE = H. Its input structure supports over-voltage tolerance (up to 5.5V) independent of VCC, enabling robust level translation from 3.3V logic to 5V-bus environments without external clamping.
It features balanced CMOS 3-state outputs capable of sourcing/sinking ±24mA at 3.3V, Ioff protection for partial power-down operation, and ESD ratings of 2000V HBM / 1000V CDM. The device operates across –40°C to 125°C and meets JESD78 Class II latch-up immunity (>100mA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V to 5.5V - supports dual-supply systems and 3.3V/5V interfacing without level shifters |
| tpd (max) | 3.7ns at VCC = 3.3V, CL = 15pF - enables reliable operation in sub-270MHz digital timing paths |
| Output Drive | ±24mA at VCC = 3.3V - sufficient to drive 50pF loads or multiple CMOS inputs with controlled edge rates |
| Ioff Current | ±10μA max at VI/VO = 5.5V - ensures safe live insertion and back-drive protection during partial power-down |
| Input Voltage Range | –0.5V to 5.5V - allows direct connection to 5V signals while powered from 1.8V/2.5V/3.3V supplies |
| Operating Temp | –40°C to +125°C - qualified for industrial and automotive under-hood applications |
| ICC (max) | 10μA - ultra-low static power ideal for battery-backed or always-on interface monitoring circuits |
Pinout & Package
74LVC1G125DCKTG4 uses the SC-70-5 (DCK) package: 2.0mm × 2.1mm body, 0.65mm pitch, 5-pin surface-mount outline with exposed pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Active-low 3-state enable input | Pulling low enables true buffer function (Y = A); high forces Y into high-Z - requires pull-up to VCC for power-up safety |
| 2 (A) | Data input | Non-inverting logic input accepting voltages up to 5.5V regardless of VCC; must be terminated to VCC/GND if unused |
| 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 | Drives high/low or floats based on OE state; supports bus sharing and signal isolation in multi-driver topologies |
| 5 (VCC) | Power supply | Supplies core logic and output drivers; requires local 0.1μF ceramic bypass capacitor placed adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| Over-voltage tolerant inputs | Accepts 0–5.5V signals while VCC = 1.65–5.5V - eliminates need for external voltage translators in mixed-rail systems |
| Ioff partial power-down | Outputs disable safely when VCC = 0V - prevents back-driving and enables hot-plug capability in modular systems |
| Low propagation delay | 3.7ns max at 3.3V/15pF - supports timing-critical interfaces such as SPI clock distribution or FPGA I/O expansion |
| ESD robustness | 2000V HBM, 1000V CDM - exceeds JEDEC JS-001/JS-002 requirements for manufacturing and field reliability |
| Ultra-small footprint | SC-70-5 package (2.0mm × 2.1mm) - saves PCB area in space-constrained portable and telecom modules |
Applications
| Cable Modem Termination System | High-Speed Data Acquisition |
|---|---|
Use Scenario: Isolating and buffering bidirectional DOCSIS upstream/downstream control signals between ASIC and RF front-end. IC Role / Device Role: 3-state bus buffer enabling time-multiplexed access to shared analog front-end resources. Use Value: Prevents signal contention during mode switching; Ioff protects RF section during partial power-down of baseband processor. |
Use Scenario: Driving ADC/DAC interface lines in portable test equipment with mixed 1.8V/3.3V logic domains. IC Role / Device Role: Level-translating buffer isolating low-voltage controller from higher-voltage data path components. Use Value: Over-voltage tolerant inputs accept 3.3V control signals while powered from 1.8V rail - reduces BOM count and layout complexity. |
| Military Radar Signal Processing | SSD Internal Bus Interface |
Use Scenario: Buffering timing-critical trigger and sync signals between FPGA and high-speed DACs in phased-array radar subsystems. IC Role / Device Role: Low-skew, 3-state non-inverting gate ensuring deterministic signal routing in multi-FPGA synchronization networks. Use Value: 3.7ns tpd and ±24mA drive maintain signal integrity across 50pF trace loads - critical for sub-nanosecond timing alignment. |
Use Scenario: Enabling/disabling communication between NVMe controller and peripheral ICs (e.g., temperature sensors, power monitors) on SSD PCB. IC Role / Device Role: Isolation buffer controlling access to shared I²C/SMBus segments during firmware updates or thermal throttling events. Use Value: Ioff and 10μA ICC allow safe bus disconnection without affecting controller power state - improves SSD power management granularity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC1G125DBVR | SOT-23-5 (DBV) package: 2.9mm × 2.8mm body, RθJA = 357°C/W - larger footprint but better thermal dissipation | Better suited for high-ambient-temperature industrial motor drives where board space permits larger package | Select DBVR when thermal margin >20°C is required at 24mA continuous drive; DCKTG4 preferred for space-constrained designs |
| 74LVC1G125GW,125 | NXP SC-70-5 variant - identical electrical specs but different qualification (AEC-Q100 Grade 2 vs TI's industrial temp range) | Qualified for automotive infotainment head units requiring extended temperature and reliability validation | Choose NXP version only when AEC-Q100 compliance is mandatory; otherwise TI part offers identical functionality and broader distributor availability |
Compared with SN74LVC1G125DBVR and 74LVC1G125GW,125, the 74LVC1G125DCKTG4 delivers optimal trade-off of ultra-compact size, industrial-grade thermal performance, and broad supply-chain support - making it the default choice for consumer, telecom, and industrial embedded designs where PCB area is constrained but AEC-Q100 is not required.
Availability
74LVC1G125DCKTG4 is available at Aetrix Electronics and suitable for cable modem termination systems, high-speed data acquisition modules, military radar signal processing units, and SSD internal bus interfaces requiring stable component supply across long production lifecycles.
Supply support for 74LVC1G125DCKTG4 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 interface IC design.
The SN74LVC1G125 series was developed to address demand for ultra-small, low-power, mixed-voltage bus buffers in space- and power-constrained digital systems - particularly in communications infrastructure and portable electronics.
FAQ
What is the maximum operating temperature for the 74LVC1G125DCKTG4?
The 74LVC1G125DCKTG4 is rated for continuous operation from –40°C to +125°C ambient temperature. This specification is validated per JEDEC JESD78 Class II latch-up testing and thermal characterization in the SC-70 package (RθJA = 371°C/W). Operation beyond 125°C risks exceeding the absolute maximum junction temperature of 150°C and may cause permanent damage.
Does the 74LVC1G125DCKTG4 support level translation between 1.8V and 5V logic domains?
Yes, the 74LVC1G125DCKTG4 supports bidirectional level translation: its inputs tolerate up to 5.5V regardless of VCC, and its outputs swing rail-to-rail (0V to VCC). When powered from 1.8V, it accepts 5V inputs and outputs 0–1.8V signals; when powered from 5V, it outputs 0–5V while accepting 5V inputs - enabling seamless interface between disparate logic families.
How should the OE pin be handled during power-up to ensure high-impedance state?
To guarantee high-impedance output during power-up or brown-out, OE must be held high via a pull-up resistor to VCC. TI recommends a 10kΩ resistor, sized to sink ≤24mA while maintaining OE > VCC × 0.7 (VIH min at 5V). Direct connection to VCC is acceptable if the driving source has no contention risk; floating OE is strictly prohibited.
Can multiple 74LVC1G125DCKTG4 outputs be paralleled for higher drive strength?
Yes - two or more 74LVC1G125DCKTG4 outputs can be wired in parallel when driven by the same A input and synchronized OE control. This configuration increases effective drive strength to ±48mA (at 3.3V), provided trace lengths and loading are matched. Avoid paralleling outputs with independent OE or A signals, as contention will cause excessive current and potential damage.
Is the 74LVC1G125DCKTG4 RoHS-compliant and lead-free?
Yes, the 74LVC1G125DCKTG4 is RoHS-compliant and lead-free per TI's packaging standards. The "G4" suffix explicitly denotes green (halogen-free) and lead-free construction, with matte tin lead finish and compliant with JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) - suitable for standard reflow processes without special handling.
74LVC1G125DCKTG4 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
74LVC1G125DCKTG4 FAQ
1.How can I place an order for 74LVC1G125DCKTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVC1G125DCKTG4 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 74LVC1G125DCKTG4 reliable?
The price and inventory of 74LVC1G125DCKTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVC1G125DCKTG4 is usually 5 days.
3.What payment methods are accepted for 74LVC1G125DCKTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVC1G125DCKTG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVC1G125DCKTG4?
74LVC1G125DCKTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVC1G125DCKTG4 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 74LVC1G125DCKTG4?
For technical support, including 74LVC1G125DCKTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVC1G125DCKTG4 requirements.
6.How does Aetrix verify that 74LVC1G125DCKTG4 is sourced from the original manufacturer or authorized distributors?
All 74LVC1G125DCKTG4 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 74LVC1G125DCKTG4 meets industry standards.
7.What is the process for return or replacement of 74LVC1G125DCKTG4?
All 74LVC1G125DCKTG4 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVC1G125DCKTG4, 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 74LVC1G125DCKTG4 part is unused and in its original packaging.
Return procedure for 74LVC1G125DCKTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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