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Texas Instruments SN74LVC1G125DCKJ
- Part No.:
- SN74LVC1G125DCKJ
- Manufacturer:
- Texas Instruments
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
SN74LVC1G125DCKJ.pdf
- Description:
- IC BUFF NON-INVERT 5.5V SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,453
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Product details
Overview
SN74LVC1G125 from Texas Instruments is a single 3-state bus buffer gate used for signal isolation and controlled data routing on low-voltage digital buses. It features 3.3V/5V-compatible operation, ±24mA output drive at 3.3V, 3.7ns max propagation delay, 10μA max ICC, and over-voltage tolerant inputs up to 5.5V - enabling robust level translation in compact embedded interfaces.
For engineers reviewing the SN74LVC1G125 datasheet, SN74LVC1G125 pinout, SN74LVC1G125 application, or SN74LVC1G125 equivalent, key selection considerations include its ultra-small SC70-5 (DCK) package, Ioff-enabled live insertion support, balanced CMOS 3-state output architecture, and guaranteed operation across –40°C to 125°C industrial temperature range.
Technical Context
The SN74LVC1G125 implements a noninverting 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 voltage down-translation (e.g., 5V inputs into 3.3V VCC) via over-voltage tolerant circuitry without internal clamping diodes to VCC.
It uses standard CMOS inputs with ≤4pF input capacitance and supports partial power-down via Ioff, which disables all outputs and limits leakage to ±10μA when VCC = 0V - critical for hot-swap and multi-rail system designs requiring back-drive protection and live insertion capability.
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 domains |
| tpd (max) | 3.7ns at 3.3V, CL = 15pF - ensures sub-4ns timing margin for high-speed bus buffering |
| Output Drive | ±24mA at 3.3V - sufficient to drive moderate capacitive loads (≤50pF) without external termination |
| Ioff Leakage | ±10μA at VCC = 0V - guarantees safe multi-voltage domain isolation during partial power-down |
| Input Voltage Range | –0.5V to 5.5V - supports 5V-tolerant inputs on 3.3V-supplied systems without level shifters |
| ICC (max) | 10μA - enables ultra-low static power in always-on monitoring or standby interface circuits |
| Operating Temp | –40°C to 125°C - qualified for automotive under-hood, industrial motor control, and military radar subsystems |
Pinout & Package
SN74LVC1G125DCKJ is packaged in the SC70-5 (DCK) outline: 2.0mm × 2.1mm body size, 0.65mm pitch, 5-terminal surface-mount package optimized for space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Active-low output enable | Drives Y to high-impedance when high; ties to VCC via pullup resistor for power-up safety |
| 2 (A) | Noninverting data input | Accepts voltages up to 5.5V regardless of VCC - enables 5V-to-3.3V down-translation |
| 3 (GND) | Ground reference | Return path for all input/output currents; must be low-impedance for noise immunity |
| 4 (Y) | 3-state buffered output | Provides true (noninverted) A signal when OE = L; high-Z when OE = H |
| 5 (VCC) | Supply voltage | Power rail (1.65–5.5V); requires local 0.1μF bypass capacitor per TI layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-5 package | 2.0mm × 2.1mm footprint - saves >50% board area vs. SOT-23 while maintaining same pinout compatibility |
| Over-voltage tolerant inputs | 5.5V max VI with no internal VCC clamp - eliminates need for external level-shifting components in mixed-voltage buses |
| Ioff partial power-down | Enables live insertion and prevents back-driving in powered-down subsystems - critical for modular hot-swap architectures |
| Balanced CMOS 3-state outputs | ±24mA drive symmetry ensures clean rise/fall edges into light loads and reduces ringing risk in point-to-point routing |
| Wide temperature range | –40°C to 125°C operation - validated for use in motor control inverters, radar front-ends, and SSD controller interfaces |
Applications
| Cable Modem Termination System | High-Speed Data Acquisition |
|---|---|
Use Scenario: Isolating upstream/downstream data paths between analog front-end and digital baseband processor in DOCSIS-compliant CMTS hardware. IC Role / Device Role / Timing Role: 3-state bus buffer controlling bidirectional signal flow on shared memory-mapped control bus. Use Value: Enables dynamic bus arbitration with <3.7ns latency and 5V-tolerant inputs - eliminating external translators in legacy 5V-compatible firmware interfaces. |
Use Scenario: Buffering parallel ADC output lines before FPGA capture in industrial test equipment operating at 100+ MSPS. IC Role / Device Role / Timing Role: Signal integrity-preserving line driver isolating ADC core from noisy digital logic supply domains. Use Value: Delivers ±24mA drive into 50pF loads while maintaining <4ns tpd - ensuring setup/hold timing margins for FPGA input registers. |
| Military Radar & Sonar | SSD Internal/External Interface |
Use Scenario: Enabling/disabling sensor data lanes between RF transceiver modules and central processing unit in airborne radar subsystems. IC Role / Device Role / Timing Role: Hot-swap-safe bus gate managing data routing during field-replaceable LRUs (Line Replaceable Units). Use Value: Ioff support and –40°C to 125°C qualification allow reliable operation during rapid thermal cycling and partial power-down events. |
Use Scenario: Level-translating command/status signals between 1.2V NVMe controller and 3.3V PCIe switch or SATA bridge ICs in enterprise SSD modules. IC Role / Device Role / Timing Role: Voltage-domain translator and bus isolator on control-side management interface (e.g., SMBus, GPIO). Use Value: 1.65V–5.5V VCC range and 5.5V-tolerant inputs support direct connection to both low-voltage controllers and legacy 3.3V peripherals. |
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) | Same logic function and SC70-5 package; slightly higher max tpd (4.1ns @ 3.3V) and lower Ioff (±5μA) | Qualified to AEC-Q100 Grade 1; preferred for automotive infotainment display interfaces | Select when automotive qualification and tighter Ioff are required; verify layout compatibility with Nexperia's thermal pad variant |
| NC7SZ125P5X (ON Semiconductor) | SC70-5 package; identical 3.3V tpd (3.7ns), but narrower VCC range (1.65–4.3V) and no 5.5V input tolerance | Suitable for cost-sensitive consumer electronics where 5V-tolerance is unnecessary | Choose for budget-constrained designs with fixed 3.3V-only supply; avoid in mixed-voltage or legacy 5V peripheral interfaces |
Compared with 74LVC1G125GW,125 and NC7SZ125P5X, the SN74LVC1G125DCKJ uniquely combines 5.5V input tolerance, full –40°C to 125°C operation, and TI's production traceability - making it optimal for industrial and defense-grade bus isolation where voltage margin and long-term supply continuity are critical.
Availability
SN74LVC1G125DCKJ is available at Aetrix Electronics and suitable for cable modem termination systems, high-speed data acquisition hardware, military radar subsystems, and SSD controller interfaces requiring stable component supply across extended temperature and voltage ranges.
Supply support for SN74LVC1G125DCKJ 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 over 50 years of innovation in high-reliability interface ICs.
The SN74LVC1G125 belongs to TI's LVC (Low-Voltage CMOS) logic family, designed specifically for low-power, high-speed, mixed-voltage digital interfacing in space-constrained industrial, automotive, and communications equipment.
FAQ
What is the maximum input voltage the SN74LVC1G125DCKJ can tolerate?
The SN74LVC1G125DCKJ supports input voltages up to 5.5V regardless of VCC level - a feature enabled by its over-voltage tolerant input structure. This allows direct connection of 5V signals to a 3.3V-powered SN74LVC1G125DCKJ without external level shifters, simplifying mixed-voltage bus design while maintaining signal integrity and avoiding damage from voltage mismatch.
Does the SN74LVC1G125DCKJ support hot-swap or live insertion?
Yes, the SN74LVC1G125DCKJ supports live insertion via its Ioff feature: when VCC = 0V, all outputs enter high-impedance state with leakage limited to ±10μA, preventing back-driving of powered subsystems. This makes the SN74LVC1G125DCKJ suitable for modular systems requiring field-replaceable units, such as radar LRUs or telecom line cards, where partial power-down must not disrupt adjacent circuitry.
What is the recommended pullup resistor value for OE on the SN74LVC1G125DCKJ?
Texas Instruments recommends tying OE to VCC through a pullup resistor to ensure high-impedance state during power-up or power-down. The minimum resistor value depends on the current-sinking capability of the driver controlling OE; for typical microcontroller GPIOs, a 10kΩ resistor provides sufficient noise immunity and fast disable timing while limiting current to <0.5mA at 5.5V - a value validated in TI's layout guidelines for the SN74LVC1G125DCKJ.
Can the SN74LVC1G125DCKJ drive a 50pF load while meeting datasheet timing specs?
Yes, the SN74LVC1G125DCKJ is characterized to meet all switching specifications - including tpd ≤ 3.7ns at 3.3V - with CL = 15pF, and TI explicitly states it can drive loads ≤ 50pF while remaining within datasheet limits. For loads approaching 50pF, adding a small series resistor (e.g., 10–33Ω) near the output helps dampen ringing and maintain signal integrity without degrading timing performance of the SN74LVC1G125DCKJ.
Is the SN74LVC1G125DCKJ compatible with 1.8V logic systems?
Yes, the SN74LVC1G125DCKJ operates down to VCC = 1.65V and supports 1.8V logic levels with guaranteed VIH(min) = 1.2V and VIL(max) = 0.63V at that supply. Its inputs accept voltages up to 5.5V, and its outputs swing rail-to-rail - making the SN74LVC1G125DCKJ fully compatible with 1.8V systems while also supporting upward translation to 3.3V or 5V domains in the same design.
SN74LVC1G125DCKJ 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:
- Obsolete
- 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
SN74LVC1G125DCKJ FAQ
1.How can I place an order for SN74LVC1G125DCKJ through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC1G125DCKJ 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 SN74LVC1G125DCKJ reliable?
The price and inventory of SN74LVC1G125DCKJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC1G125DCKJ is usually 5 days.
3.What payment methods are accepted for SN74LVC1G125DCKJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC1G125DCKJ transactions.
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4.How is shipping managed for SN74LVC1G125DCKJ?
SN74LVC1G125DCKJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC1G125DCKJ 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 SN74LVC1G125DCKJ?
For technical support, including SN74LVC1G125DCKJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC1G125DCKJ requirements.
6.How does Aetrix verify that SN74LVC1G125DCKJ is sourced from the original manufacturer or authorized distributors?
All SN74LVC1G125DCKJ 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 SN74LVC1G125DCKJ meets industry standards.
7.What is the process for return or replacement of SN74LVC1G125DCKJ?
All SN74LVC1G125DCKJ units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC1G125DCKJ, 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 SN74LVC1G125DCKJ part is unused and in its original packaging.
Return procedure for SN74LVC1G125DCKJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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