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Texas Instruments 74LVC1G125DCKRG4
- Part No.:
- 74LVC1G125DCKRG4
- Manufacturer:
- Texas Instruments
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
74LVC1G125DCKRG4.pdf
- Description:
- IC BUFF NON-INVERT 5.5V SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,052
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Product details
Overview
74LVC1G125DCKRG4 from Texas Instruments is a single 3-state noninverting bus buffer gate in SC-70 (DCK) package, supporting 1.65V–5.5V supply operation, 3.7ns max propagation delay at 3.3V, ±24mA output drive, and over-voltage tolerant inputs up to 5.5V - used for level translation and bidirectional bus isolation in compact digital interfaces.
For engineers reviewing the 74LVC1G125DCKRG4 datasheet, 74LVC1G125DCKRG4 pinout, 74LVC1G125DCKRG4 application, or 74LVC1G125DCKRG4 equivalent, key selection criteria include 3-state control timing (enable/disable), Ioff support for live insertion, thermal performance in SC-70, and compatibility with mixed-voltage 3.3V/5V systems requiring low-power, high-speed buffering without signal inversion.
Technical Context
The 74LVC1G125DCKRG4 implements a CMOS-based noninverting buffer with active-low 3-state enable (OE), where Y follows A when OE = L and enters high-impedance when OE = H. Its input structure supports over-voltage tolerance (up to 5.5V) independent of VCC, enabling reliable level translation from 3.3V logic to 5V buses.
It features balanced CMOS 3-state outputs capable of sourcing/sinking ±24mA at 3.3V, Ioff protection that disables all outputs at 0V VCC, and input transition rate limits (5 ns/V at 5V) to prevent oscillation - critical for stable operation in noise-sensitive industrial and communications interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V to 5.5V - enables direct interface between 1.8V, 2.5V, 3.3V, and 5V logic domains without external level shifters. |
| tpd (max) | 3.7ns at VCC = 3.3V, CL = 15pF - supports >100MHz data rates in short-bus applications like sensor hubs or FPGA I/O expansion. |
| Output Drive | ±24mA at VCC = 3.3V - sufficient to drive multiple LVC loads or moderate capacitive loads (<50pF) without external buffers. |
| Ioff Current | ±10μA max at VCC = 0V - ensures safe live insertion and back-drive protection during partial power-down in hot-swap systems. |
| Input Voltage Range | –0.5V to 5.5V - allows 5V-tolerant inputs even when VCC = 1.8V, simplifying mixed-supply board design and eliminating clamping diodes. |
| ICC (max) | 10μA at TA = 85°C - enables ultra-low static power in battery-backed or always-on monitoring circuits. |
| ESD Rating | 2000V HBM - meets industrial-grade robustness requirements for field-deployable equipment without additional protection. |
Pinout & Package
74LVC1G125DCKRG4 uses the SC-70-5 (DCK) package: 2.0mm × 2.1mm body size, 0.65mm pitch, 5-pin surface-mount outline optimized for space-constrained PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Active-low 3-state enable input | Pulling OE high disables Y (high-Z); pulling OE low enables true A→Y pass-through - requires pull-up resistor for power-up safety. |
| 2 (A) | Noninverting data input | Accepts voltages up to 5.5V regardless of VCC; compatible with TTL and LVTTL logic families across supply voltages. |
| 3 (GND) | Ground reference | Return path for all internal currents; must be low-impedance and adjacent to bypass capacitor for noise immunity. |
| 4 (Y) | 3-state noninverting output | Drives high/low or floats (Z) based on OE; output voltage swing is rail-to-rail (0V to VCC) with defined VOH/VOL under load. |
| 5 (VCC) | Positive supply | Supplies core logic and output drivers; requires local 0.1μF ceramic decoupling placed within 2mm of pin per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Over-voltage tolerant inputs | Supports 5.5V input signals with VCC as low as 1.65V - eliminates need for external level translators in 3.3V-to-5V interface paths. |
| Ioff partial power-down | Outputs fully disabled and leakage-limited (<±10μA) when VCC = 0V - enables safe hot-plug operation in modular backplanes and docking stations. |
| Low propagation delay | 3.7ns max at 3.3V/15pF - preserves signal integrity in high-speed control lines (e.g., SPI chip select, I²C bus arbitration). |
| Ultra-small SC-70 package | 2.0mm × 2.1mm footprint - ideal for wearables, IoT edge nodes, and dense FPGA/CPU daughterboards where board area is premium. |
| CMOS-compatible 3-state control | OE pin synchronized with logic thresholds - allows clean bus sharing among multiple devices without contention or shoot-through. |
Applications
| Industrial Sensor Hub | Mixed-Voltage FPGA I/O Expansion |
|---|---|
|
Use Scenario: Aggregating analog sensor outputs (via ADC) and digital status signals into a single 3.3V microcontroller bus with isolated power domains. IC Role / Device Role / Timing Role: Bidirectional bus buffer isolating 5V sensor interface logic from 3.3V MCU domain while enabling shared interrupt lines. Use Value: Eliminates level-shifter ICs by leveraging 5.5V-tolerant inputs and 3.3V-compatible outputs - reduces BOM count and layout complexity. |
Use Scenario: Extending FPGA GPIO banks to drive legacy 5V peripherals (e.g., displays, EEPROMs) without violating core I/O voltage limits. IC Role / Device Role / Timing Role: Noninverting 3-state buffer controlled by FPGA GPIO to gate 5V peripheral access during configuration or fault conditions. Use Value: Provides precise timing-controlled isolation (tpd ≤ 3.7ns) and ±24mA drive - avoids timing skew and ensures reliable peripheral initialization. |
| Hot-Swappable Module Interface | Low-Power Remote Monitoring Node |
|
Use Scenario: Backplane slot supporting plug-in modules with independent power sequencing and shared system bus. IC Role / Device Role / Timing Role: Bus buffer with Ioff-enabled 3-state outputs ensuring zero current flow during module insertion/removal. Use Value: Prevents back-driving and ground bounce during hot-swap events - meets IEC 61000-4-2 and MIL-STD-704 compliance requirements. |
Use Scenario: Battery-powered environmental monitor transmitting sensor data via LoRaWAN or NB-IoT, requiring ultra-low standby current. IC Role / Device Role / Timing Role: Signal conditioner enabling MCU wake-up via external interrupt while maintaining <10μA ICC in sleep mode. Use Value: Achieves sub-15μA total system standby (including buffer) - extends 10-year battery life in sealed remote deployments. |
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, higher RθJA (357°C/W) vs. DCK's 371°C/W - slightly better thermal resistance but larger footprint. | Preferred where manual rework or test probing is required; less suitable for ultra-dense layouts than SC-70. | Select DBVR only if board assembly process favors SOT-23 handling or thermal margin exceeds 20°C above ambient. |
| 74LVC1G125GW,125 | NXP SC-70-5 variant with identical electrical specs but different qualification (AEC-Q100 Grade 2) and tighter VIL/VIH tolerances at 1.8V. | Better suited for automotive infotainment I/O expansion where extended temperature (-40°C to 105°C) and ESD robustness are mandated. | Choose NXP version only for automotive programs requiring AEC-Q100 certification - not drop-in for industrial use due to differing qualification scope. |
Compared with SN74LVC1G125DBVR and 74LVC1G125GW,125, the 74LVC1G125DCKRG4 delivers optimal space efficiency in SC-70 while maintaining full functional equivalence for industrial and communications applications - its 2.0mm × 2.1mm footprint enables 38% smaller placement area than SOT-23, with no trade-off in speed or drive strength.
Availability
74LVC1G125DCKRG4 is available at Aetrix Electronics and suitable for industrial sensor hubs, FPGA I/O expansion, hot-swappable module interfaces, and low-power remote monitoring nodes requiring stable component supply across multi-year production cycles.
Supply support for 74LVC1G125DCKRG4 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 and power management ICs.
The SN74LVC1G125 belongs to TI's LVC logic family - designed specifically for low-voltage, high-speed, mixed-supply digital interfacing in space- and power-constrained applications from consumer IoT to industrial automation.
FAQ
What is the maximum operating temperature range for the 74LVC1G125DCKRG4?
The 74LVC1G125DCKRG4 is rated for operation from –40°C to +125°C ambient temperature. This extended range supports deployment in harsh environments such as motor control enclosures, outdoor telecom infrastructure, and under-hood automotive modules - verified per JEDEC JESD22-A108 thermal cycling and JESD22-A104 high-temperature operating life testing.
Does the 74LVC1G125DCKRG4 support 5V-tolerant inputs when powered from 1.8V?
Yes, the 74LVC1G125DCKRG4 supports input voltages up to 5.5V regardless of VCC level, including at 1.8V operation. This over-voltage tolerance is achieved via internal protection circuitry without positive clamp diodes - enabling direct connection to 5V buses while powered from 1.8V, as confirmed in Section 7.3.5 of the official datasheet SCES223U.
How should the OE pin be handled during power-up to ensure high-impedance state?
To guarantee high-impedance output during power-up or power-down, the OE pin of the 74LVC1G125DCKRG4 must be tied to VCC through a pull-up resistor. TI recommends ≥10kΩ for most applications; the minimum value depends on the current-sinking capability of the driving source - detailed in Section 3 and Figure 7-1 of the SCES223U datasheet.
Can the 74LVC1G125DCKRG4 drive a 50pF capacitive load while meeting timing specs?
Yes, the 74LVC1G125DCKRG4 is characterized for CL = 30pF and 50pF loads across temperature and voltage ranges (Sections 5.7–5.8). At VCC = 3.3V and TA = 25°C, tpd remains ≤4.5ns with 50pF load - well within specification. For loads >50pF, TI recommends adding a series damping resistor to suppress ringing, as outlined in Section 8.2.1.3.
Is the 74LVC1G125DCKRG4 pin-compatible with other SC-70-5 logic buffers?
No - the 74LVC1G125DCKRG4 has a fixed pinout (OE-A-GND-Y-VCC) specific to TI's LVC family. While other SC-70-5 buffers (e.g., SN74LVC1G07, SN74LVC1G08) share the same package outline, their pin assignments differ. Always verify pin mapping using the "Pin Configuration and Functions" section (page 3) of the SCES223U datasheet before board layout.
74LVC1G125DCKRG4 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
74LVC1G125DCKRG4 FAQ
1.How can I place an order for 74LVC1G125DCKRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVC1G125DCKRG4 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 74LVC1G125DCKRG4 reliable?
The price and inventory of 74LVC1G125DCKRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVC1G125DCKRG4 is usually 5 days.
3.What payment methods are accepted for 74LVC1G125DCKRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVC1G125DCKRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVC1G125DCKRG4?
74LVC1G125DCKRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVC1G125DCKRG4 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 74LVC1G125DCKRG4?
For technical support, including 74LVC1G125DCKRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVC1G125DCKRG4 requirements.
6.How does Aetrix verify that 74LVC1G125DCKRG4 is sourced from the original manufacturer or authorized distributors?
All 74LVC1G125DCKRG4 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 74LVC1G125DCKRG4 meets industry standards.
7.What is the process for return or replacement of 74LVC1G125DCKRG4?
All 74LVC1G125DCKRG4 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVC1G125DCKRG4, 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 74LVC1G125DCKRG4 part is unused and in its original packaging.
Return procedure for 74LVC1G125DCKRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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