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Texas Instruments SN74LVC1G240DCKR
- Part No.:
- SN74LVC1G240DCKR
- Manufacturer:
- Texas Instruments
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
SN74LVC1G240DCKR.pdf
- Description:
- IC BUFFER INVERT 5.5V SC70-5
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SN74LVC1G240 from Texas Instruments is a single-channel inverting buffer/driver with 3-state output, designed for signal conditioning and bus isolation in low-voltage digital systems. It operates from 1.65V to 5.5V, delivers ±24mA output drive at 3.3V, achieves 3.7ns max propagation delay, and supports 5.5V-tolerant inputs - enabling level translation in mixed-supply applications such as microcontroller I/O expansion and sensor interface buffering.
For engineers reviewing the SN74LVC1G240 datasheet, SN74LVC1G240 pinout, SN74LVC1G240 application, or SN74LVC1G240 equivalent, key selection criteria include 3-state control timing (enable/disable), Ioff support for live insertion, input overvoltage tolerance, thermal performance in SC70-5, and compatibility with 15pF/30pF load conditions across –40°C to 125°C.
Technical Context
The SN74LVC1G240 implements a CMOS-based inverting logic function with active-low 3-state control: when OE is low, A is inverted and driven to Y; when OE is high, Y enters high-impedance state. Its balanced CMOS output stage provides symmetrical sourcing/sinking capability up to ±24mA at 3.3V, while Ioff circuitry ensures zero current flow during VCC = 0V conditions.
Input structure includes overvoltage-tolerant protection without positive clamp diodes, allowing VI up to 5.5V independent of VCC. The device complies with JESD78 Class II latch-up immunity (>100mA), supports down-translation (e.g., 5V input → 3.3V output), and maintains valid logic thresholds across its full 1.65V–5.5V supply range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.65V to 5.5V - enables operation across 1.8V, 2.5V, 3.3V, and 5V logic domains |
| Max Propagation Delay | 3.7ns at 3.3V, CL = 15pF - supports >100MHz signal re-driving in compact timing-critical paths |
| Output Drive Strength | ±24mA at 3.3V - sufficient to drive multiple LVC/LVT inputs or moderate capacitive loads without external buffers |
| Input Voltage Tolerance | Up to 5.5V regardless of VCC - allows interfacing with higher-voltage peripherals without level shifters |
| Ioff Current | ±10μA max at VI/VO = 5.5V - guarantees isolation during partial power-down and hot-plug scenarios |
| Quiescent ICC | 10μA max - minimizes standby power in battery-backed or always-on subsystems |
| Operating Temperature | –40°C to +125°C - qualified for automotive under-hood, industrial control, and extended-environment applications |
Pinout & Package
SN74LVC1G240DCKR uses the DCK (SC-70, 5-pin) package: 2.0mm × 2.1mm body size, 1.25mm width, ultra-small footprint suitable for space-constrained PCBs. Thermal resistance RθJA = 371°C/W confirms suitability for low-power density layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OE | Active-low 3-state enable input | Drives Y into high-Z when high; must be pulled up to VCC via resistor (e.g., 10kΩ) for power-up safety |
| 2 - A | Inverting data input | Accepts 0–5.5V signals; CMOS-compatible with fast transition requirement (≤10ns/V at 3.3V) |
| 3 - GND | Ground reference | Return path for all currents; requires low-inductance connection to minimize switching noise |
| 4 - Y | Inverted, 3-state output | Provides true inversion (A→¬Y) when OE low; floats when OE high; supports bus sharing |
| 5 - VCC | Positive supply | Decoupling capacitor (0.1μF) required adjacent to pin to suppress supply transients |
Key Features
| Feature | Design Value |
|---|---|
| NanoFree™ SC-70 package | Enables <2mm² board area usage - critical for wearables, IoT sensors, and miniaturized modules |
| Ioff partial-power-down | Prevents back-drive and current leakage when VCC = 0V - essential for hot-swap and modular system designs |
| 5.5V-tolerant inputs | Eliminates need for external level translators when interfacing 5V legacy peripherals to 3.3V or 1.8V controllers |
| Low 3.7ns tpd at 3.3V | Meets timing budgets for high-speed clock/data re-driving in FPGA I/O banks and MCU peripheral expansion |
| JESD78 Class II latch-up immunity | Withstands >100mA fault current - ensures robustness in noisy industrial or automotive ECU environments |
Applications
| LED Indicator Control | Digital Signal Redriving |
|---|---|
Use Scenario: Driving discrete LEDs or LED arrays from low-current GPIO pins of microcontrollers or FPGAs. IC Role / Device Role / Timing Role: Inverting buffer with 3-state output acts as current-amplifying gate and polarity adjuster; OE enables dynamic on/off control. Use Value: Delivers ±24mA at 3.3V - sufficient to drive standard 20mA LEDs without external transistor; Ioff prevents reverse current during MCU reset. | Use Scenario: Restoring signal integrity on long PCB traces or between ICs with mismatched drive strength. IC Role / Device Role / Timing Role: Single-channel inverter re-drives and inverts digital signals (e.g., UART TX, SPI CLK) while providing bus isolation via 3-state control. Use Value: 3.7ns max tpd preserves edge fidelity; 15pF/30pF load specs validate use in typical routing scenarios; SC70 footprint minimizes added board area. |
| Transmission Line Termination | Controller Reset Hold |
Use Scenario: Driving controlled-impedance lines (e.g., 50Ω PCB traces) in point-to-point digital links. IC Role / Device Role / Timing Role: Output driver with matched sourcing/sinking capability ensures clean rise/fall times and reduces reflections. Use Value: Balanced ±24mA drive enables fast edge rates into 50Ω loads; low Cpd (18pF @ 3.3V) limits capacitive loading on source node. | Use Scenario: Holding peripheral enable or reset lines in defined state during processor boot or brown-out recovery. IC Role / Device Role / Timing Role: Inverting buffer with OE tied to controller reset signal holds downstream device in reset until firmware releases OE. Use Value: High-impedance output during reset avoids contention; guaranteed VIH/VIL thresholds ensure reliable assertion across voltage corners. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar inverting buffer with 3-state output applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74LVC1G04GW,125 (Nexperia) | No 3-state output; fixed inverter only - lacks OE control and bus isolation capability | Suitable only for permanent inversion, not shared-bus or dynamic enable scenarios | Select SN74LVC1G240DCKR when 3-state control, Ioff, or 5.5V-tolerant inputs are required. |
| SN74LVC1G125DCKR (Texas Instruments) | Non-inverting 3-state buffer; identical pinout, package, supply range, and drive strength | Used where signal polarity must be preserved (e.g., clock forwarding, address latching) | Choose SN74LVC1G240DCKR specifically for inversion + 3-state; use SN74LVC1G125DCKR for non-inverting + 3-state. |
Compared with 74LVC1G04GW,125, SN74LVC1G240DCKR adds critical 3-state control and Ioff for system-level power management; versus SN74LVC1G125DCKR, it provides functional inversion while retaining identical layout, thermal, and drive characteristics - enabling drop-in replacement in inverting signal paths.
Availability
SN74LVC1G240DCKR is available at Aetrix Electronics and suitable for LED indicator driving, digital signal redriving, transmission line interfacing, and controller reset hold applications requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance.
Supply support for SN74LVC1G240DCKR 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, low-power logic families.
The SN74LVC1G240 belongs to TI's LVC (Low-Voltage CMOS) logic family, engineered for interoperability across 1.65V–5.5V supplies, robust ESD tolerance, and minimal board space - targeting portable, industrial, and automotive digital interface applications.
FAQ
What is the maximum operating temperature for SN74LVC1G240DCKR?
The SN74LVC1G240DCKR is rated for operation from –40°C to +125°C ambient temperature. This extended range is validated per JEDEC JESD78 latch-up testing and thermal characterization, making SN74LVC1G240DCKR suitable for under-hood automotive, industrial motor control, and outdoor equipment applications where thermal stress is present.
Does SN74LVC1G240DCKR support 5V input signals when powered at 3.3V?
Yes, SN74LVC1G240DCKR supports input voltages up to 5.5V regardless of VCC level. When powered at 3.3V, its inputs remain tolerant to 5V logic levels - enabling direct interfacing with 5V peripherals without external level-shifting circuitry. This overvoltage tolerance is implemented via dedicated input protection structures, not standard clamp diodes.
What is the recommended pull-up resistor value for OE on SN74LVC1G240DCKR?
A 10kΩ pull-up resistor from OE to VCC is recommended for SN74LVC1G240DCKR to ensure high-impedance output during power-up and power-down. This value balances sufficient current sinking (per driver capability) against power consumption and noise immunity. TI specifies that the minimum resistor value depends on the current-sinking capability of the OE driver, and 10kΩ meets this across all valid VCC conditions.
Can SN74LVC1G240DCKR drive a 50pF capacitive load reliably?
Yes, SN74LVC1G240DCKR is characterized for CL = 30pF and 50pF loads per TI's switching specifications. At 3.3V and –40°C to 85°C, tpd remains ≤4.5ns with 50pF loading. For robust design, TI recommends limiting total load capacitance to ≤50pF; if exceeded, add a series damping resistor near the output to control ringing and maintain signal integrity.
Is SN74LVC1G240DCKR pin-compatible with other SC-70 logic devices?
SN74LVC1G240DCKR uses the standard 5-pin SC-70 (DCK) footprint, matching pinout and pad layout with TI's SN74LVC1G125DCKR, SN74LVC1G07DCKR, and other single-gate SC-70 logic devices. This enables layout reuse across functionally distinct but mechanically identical components - reducing PCB redesign effort when modifying signal polarity or drive type.
SN74LVC1G240DCKR 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, 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
SN74LVC1G240DCKR FAQ
1.How can I place an order for SN74LVC1G240DCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC1G240DCKR 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 SN74LVC1G240DCKR reliable?
The price and inventory of SN74LVC1G240DCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC1G240DCKR is usually 5 days.
3.What payment methods are accepted for SN74LVC1G240DCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC1G240DCKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC1G240DCKR?
SN74LVC1G240DCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC1G240DCKR 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 SN74LVC1G240DCKR?
For technical support, including SN74LVC1G240DCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC1G240DCKR requirements.
6.How does Aetrix verify that SN74LVC1G240DCKR is sourced from the original manufacturer or authorized distributors?
All SN74LVC1G240DCKR 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 SN74LVC1G240DCKR meets industry standards.
7.What is the process for return or replacement of SN74LVC1G240DCKR?
All SN74LVC1G240DCKR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC1G240DCKR, 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 SN74LVC1G240DCKR part is unused and in its original packaging.
Return procedure for SN74LVC1G240DCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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