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Texas Instruments SN74LVC1G125DCKT
- Part No.:
- SN74LVC1G125DCKT
- Manufacturer:
- Texas Instruments
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
SN74LVC1G125DCKT.pdf
- Description:
- IC BUFF NON-INVERT 5.5V SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:8,049
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Product details
Overview
SN74LVC1G125 from Texas Instruments is a single 3-state bus buffer gate used for signal isolation and bidirectional bus control in low-voltage digital systems. It features true noninverting logic, 3.3V/5V supply compatibility (1.65–5.5V), ±24mA output drive at 3.3V, 3.7ns max propagation delay, and Ioff support for live insertion.
For engineers reviewing the SN74LVC1G125 datasheet, SN74LVC1G125 pinout, SN74LVC1G125 application, or SN74LVC1G125 equivalent, key selection criteria include 3-state enable timing (ten/tdis), overvoltage-tolerant inputs (up to 5.5V), ultra-small SC70-5 package footprint, and partial-power-down capability for system-level hot-swap integrity.
Technical Context
The SN74LVC1G125 implements a CMOS-based noninverting buffer with active-low 3-state enable (OE). Its functional mode is strictly controlled by OE: low enables A→Y pass-through; high forces Y into high-impedance. Input voltage tolerance extends to 5.5V independent of VCC, enabling level translation from 3.3V to 5V buses without external components.
It uses balanced CMOS 3-state outputs capable of sourcing and sinking equal current (±24mA at 3.3V), with Ioff circuitry that disables all outputs when VCC = 0V-critical for back-drive protection during partial power-down. The device operates across –40°C to 125°C and supports CL ≤ 50pF loads while maintaining specified tpd and noise margins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V to 5.5V - supports mixed-voltage system interfacing and legacy 5V TTL compatibility |
| Max Propagation Delay | 3.7ns at 3.3V, CL = 15pF - enables reliable operation in sub-270MHz data paths |
| Output Drive | ±24mA at 3.3V - sufficient to drive multiple LVC/LVT inputs or moderate PCB trace capacitance |
| Ioff Current | ±10μA max - ensures zero-current isolation during VCC ramp-up/down for hot-plug safety |
| Input Voltage Tolerance | Up to 5.5V - allows direct connection to 5V signals while powered from 3.3V or lower supplies |
| ESD Rating | 2000V HBM - meets industrial-grade robustness requirements per JEDEC JS-001 |
| Operating Temp | –40°C to 125°C - qualified for automotive under-hood and industrial motor-control environments |
Pinout & Package
SN74LVC1G125DCKT uses the SC70-5 (DCK) package: 2.0mm × 2.1mm body, 0.65mm pitch, 5-pin surface-mount outline with exposed pad not present. Pin 1 is top-left corner (marking dot adjacent), pin 5 is top-right.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A | Data input | Noninverting input accepting 0–5.5V; drives Y when OE is low |
| Y | 3-state output | True-buffered output; high-impedance when OE = high; sinks/sources up to ±24mA |
| OE | Active-low enable | Low enables A→Y path; high forces Y into Hi-Z; requires pullup to VCC for power-up safety |
| GND | Ground reference | Return path for all currents; must be low-impedance and co-located with bypass capacitor |
| VCC | Supply voltage | Power rail (1.65–5.5V); powers internal logic and output drivers; bypass with 0.1μF ceramic |
Key Features
| Feature | Design Value |
|---|---|
| Overvoltage-tolerant inputs | Accepts 0–5.5V regardless of VCC setting - eliminates level-shifters in 3.3V-to-5V interface designs |
| Ioff partial-power-down | Outputs fully disable at VCC = 0V - prevents back-driving and latch-up during hot-swap or power sequencing |
| Ultra-small SC70-5 footprint | 2.0mm × 2.1mm body - saves >60% board area vs. SOT-23-5; ideal for space-constrained SSD and video modules |
| Low ICC quiescent current | 10μA max - reduces standby power in always-on subsystems like cable modem termination systems |
| CMOS-compatible 3-state control | OE pin directly interfaces with microcontroller GPIO or FPGA I/O banks - no external logic required |
Applications
| Video Broadcasting Infrastructure | Cable Modem Termination System |
|---|---|
Use Scenario: Signal routing between multi-format IP transcoders and scalable platform backplanes where voltage domain bridging is required. IC Role / Device Role / Timing Role: 3-state bus buffer isolating 3.3V FPGA control logic from 5V video processing ASICs during reconfiguration. Use Value: Enables safe hot-swap of video modules without disrupting adjacent 5V signal paths due to Ioff and overvoltage-tolerant inputs. | Use Scenario: Bidirectional data buffering between DOCSIS PHY layer and host processor in CMTS edge nodes. IC Role / Device Role / Timing Role: Single-channel direction-controlled buffer managing upstream/downstream packet flow on shared memory-mapped buses. Use Value: Provides <3.7ns propagation delay and ±24mA drive to maintain signal integrity across 15pF channel loads at 100+ Mbps rates. |
| Military Radar Signal Acquisition | SSD Internal Bus Isolation |
Use Scenario: High-speed data acquisition from ADC front-ends in radar receivers operating across extended temperature ranges. IC Role / Device Role / Timing Role: Low-skew buffer isolating analog-to-digital conversion results before transmission to DSP subsystems. Use Value: Delivers guaranteed operation from –40°C to 125°C with <10μA ICC - critical for uncooled airborne radar electronics. | Use Scenario: Isolating NVMe controller I/O from NAND flash arrays in enterprise SSD modules with thermal constraints. IC Role / Device Role / Timing Role: 3-state gate controlling write-enable and status-read paths between controller and flash die stacks. Use Value: SC70-5 package minimizes layout area while supporting 5V tolerant inputs for legacy flash command signaling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74LVC1G125GW,125 (Nexperia) | Identical logic function and pinout; same SC70-5 package; 3.7ns tpd at 3.3V; 2000V HBM ESD rating | Qualified to AEC-Q100 Grade 1; preferred for automotive infotainment display interfaces | Select when automotive qualification or alternate long-term supply chain diversification is required |
| NC7SZ125P5X (ON Semiconductor) | Same 1.65–5.5V VCC range; 3.5ns tpd at 3.3V; ±24mA drive; but only rated to 125°C junction (not ambient) | Limited to commercial/industrial temp grades; lacks Ioff specification - unsuitable for live-insertion systems | Choose for cost-sensitive consumer electronics where full industrial temp and Ioff are not mandatory |
Compared with SN74LVC1G125DCKT, the Nexperia 74LVC1G125GW,125 offers identical electrical behavior plus automotive qualification, while the ON Semi NC7SZ125P5X trades Ioff and extended temperature support for lower unit cost in non-critical applications.
Availability
SN74LVC1G125DCKT is available at Aetrix Electronics and suitable for high-speed data acquisition, video broadcasting infrastructure, and military radar signal processing requiring stable component supply across extended temperature and voltage ranges.
Supply support for SN74LVC1G125DCKT 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 U.S.-based semiconductor company specializing in analog and embedded processing solutions, with leadership in logic, power management, and signal chain technologies.
The SN74LVC1G125 belongs to TI's LVC (Low-Voltage CMOS) logic family, designed specifically for voltage-translating, low-power, 3-state bus interface applications in space-constrained and thermally demanding systems.
FAQ
What is the maximum operating temperature for SN74LVC1G125DCKT?
The SN74LVC1G125DCKT 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 applies across the full 1.65V–5.5V VCC range. Thermal derating is not required within this range, making SN74LVC1G125DCKT suitable for under-hood automotive and industrial motor-control applications.
Does SN74LVC1G125DCKT support 5V-tolerant inputs when powered from 3.3V?
Yes, SN74LVC1G125DCKT supports input voltages up to 5.5V regardless of VCC level - including when VCC = 3.3V. This overvoltage tolerance is implemented via internal protection circuitry without positive clamp diodes, enabling direct interfacing with 5V logic families without external level shifters. The feature is explicitly confirmed in Section 7.3.5 of the official datasheet.
What is the recommended pullup resistor value for the OE pin on SN74LVC1G125DCKT?
A 10kΩ pullup resistor from OE to VCC is recommended for SN74LVC1G125DCKT to ensure reliable high-impedance state during power-up. This value balances current consumption (<0.33mA at 3.3V) against noise immunity and rise-time performance. TI's datasheet Section 7.1 specifies that the minimum resistor value depends on the driver's current-sinking capability, and 10kΩ satisfies this across all valid VCC conditions.
Can SN74LVC1G125DCKT drive a 50pF load while maintaining its 3.7ns propagation delay?
No - the 3.7ns maximum propagation delay for SN74LVC1G125DCKT is specified at CL = 15pF. At CL = 50pF, typical tpd increases to ~4.7ns (per Section 5.8, –40°C to 125°C). While the device remains functional at 50pF, timing-critical designs requiring ≤3.7ns must limit capacitive loading to 15pF or use series termination to manage edge rates and ringing.
Is SN74LVC1G125DCKT pin-compatible with other SC70-5 logic buffers?
SN74LVC1G125DCKT is pin-compatible with functionally equivalent SC70-5 bus buffers such as the 74LVC1G125GW,125 (Nexperia) and NC7SZ125P5X (onsemi), sharing identical pin 1 (A), pin 2 (GND), pin 3 (Y), pin 4 (OE), and pin 5 (VCC) assignments. However, electrical differences - especially Ioff presence and temperature grading - require validation before drop-in replacement in production systems.
SN74LVC1G125DCKT 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:
- 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:
- 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
SN74LVC1G125DCKT FAQ
1.How can I place an order for SN74LVC1G125DCKT through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC1G125DCKT 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 SN74LVC1G125DCKT reliable?
The price and inventory of SN74LVC1G125DCKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC1G125DCKT is usually 5 days.
3.What payment methods are accepted for SN74LVC1G125DCKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC1G125DCKT transactions.
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4.How is shipping managed for SN74LVC1G125DCKT?
SN74LVC1G125DCKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC1G125DCKT 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 SN74LVC1G125DCKT?
For technical support, including SN74LVC1G125DCKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC1G125DCKT requirements.
6.How does Aetrix verify that SN74LVC1G125DCKT is sourced from the original manufacturer or authorized distributors?
All SN74LVC1G125DCKT 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 SN74LVC1G125DCKT meets industry standards.
7.What is the process for return or replacement of SN74LVC1G125DCKT?
All SN74LVC1G125DCKT units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC1G125DCKT, 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 SN74LVC1G125DCKT part is unused and in its original packaging.
Return procedure for SN74LVC1G125DCKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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