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Texas Instruments SN74LVC1G240DCKT
- Part No.:
- SN74LVC1G240DCKT
- Manufacturer:
- Texas Instruments
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
SN74LVC1G240DCKT.pdf
- Description:
- IC BUFFER INVERT 5.5V SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,897
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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 space-constrained digital systems. It operates from 1.65V to 5.5V, delivers ±24mA drive at 3.3V, achieves 3.7ns max propagation delay, and supports 5.5V-tolerant inputs - enabling level translation in mixed-voltage interfaces such as microcontroller GPIO expansion or 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, low ICC (≤10μA), and NanoFree™ package compatibility with high-density PCB layouts.
Technical Context
The SN74LVC1G240 implements a CMOS-based inverting logic gate 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, supporting clean signal redriving without external biasing.
It features Ioff circuitry that disables all outputs at 0V VCC, preventing back-drive current during partial power-down, and includes overvoltage-tolerant inputs (up to 5.5V) independent of VCC - critical for interfacing legacy 5V logic to modern 1.8V/3.3V controllers while maintaining latch-up immunity (>100mA per JESD78 Class II).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V to 5.5V - enables operation across 1.8V, 2.5V, 3.3V, and 5V logic domains |
| tpd (max) | 3.7ns at 3.3V, CL = 15pF - ensures sub-4ns signal propagation for high-speed redriving |
| Output Drive | ±24mA at 3.3V - sufficient to drive LEDs, transmission lines, or multiple CMOS inputs directly |
| Ioff Leakage | ±10μA at 5.5V - guarantees safe hot-plug and partial-power-down behavior |
| Input Voltage Range | –0.5V to 5.5V - supports 5V-tolerant inputs on 1.65V–3.3V supplies for seamless voltage translation |
| ICC (max) | 10μA - enables ultra-low static power in battery-powered or always-on monitoring circuits |
| ESD Rating | ±2000V HBM - meets industrial-grade ESD robustness requirements without external protection |
Pinout & Package
SN74LVC1G240 is packaged in the DCK (SC-70, 5-pin) variant: 2.0mm × 2.1mm body size, 0.65mm pitch, surface-mount, lead-free, RoHS-compliant package optimized for high-density routing and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OE | Active-low 3-state enable input | Drives Y into high-Z when high; ties to VCC via pullup for power-up safety |
| 2 - A | Inverting data input | Accepts voltages up to 5.5V regardless of VCC; standard CMOS input with ≤4pF capacitance |
| 3 - GND | Ground reference | Return path for all internal currents; must be low-impedance and adjacent to decoupling capacitor |
| 4 - Y | Inverting 3-state output | Drives inverted A when OE = L; floats (high-Z) when OE = H; supports ±24mA drive |
| 5 - VCC | Positive supply | Supplies core logic and output drivers; requires local 0.1μF ceramic bypass capacitor |
Key Features
| Feature | Design Value |
|---|---|
| NanoFree™ packaging | SC-70 (DCK) footprint - 2.0mm × 2.1mm body enables >50% board space reduction vs. SOT-23 |
| 5.5V-tolerant inputs | Allows direct connection to 5V signals while operating at 1.65V–3.3V VCC - eliminates level-shifter ICs |
| Ioff partial power-down | Prevents back-current flow when VCC = 0V - essential for hot-swap, modular backplane, or battery-backed subsystems |
| Low ICC (≤10μA) | Reduces system standby power - suitable for IoT edge nodes requiring multi-year battery life |
| 3.7ns tpd @ 3.3V | Enables reliable redriving of 100+ MHz digital clocks or fast serial control signals (e.g., SPI, I²C buffers) |
Applications
| LED Indicator Control | Digital Signal Redriving |
|---|---|
|
Use Scenario: Driving discrete status LEDs from low-drive MCU GPIO pins. IC Role / Device Role: Inverting buffer with 3-state output used to sink LED current through Y pin. Use Value: ±24mA drive at 3.3V eliminates need for external transistor; OE allows dynamic LED blanking during reset sequences. |
Use Scenario: Restoring signal integrity on long PCB traces between FPGA and peripheral ICs. IC Role / Device Role: Single inverting buffer redriving clock or data lines with controlled edge rates. Use Value: 3.7ns tpd and balanced CMOS output minimize jitter accumulation; 3-state enables bus sharing without contention. |
| Transmission Line Termination | Controller Reset Hold |
|
Use Scenario: Driving 50Ω coaxial or PCB trace lines in test equipment or industrial comms modules. IC Role / Device Role: Impedance-matched driver with source termination capability via series resistor. Use Value: ±24mA drive supports 50Ω line driving at 3.3V; low Cpd (18pF) reduces capacitive loading on high-speed lines. |
Use Scenario: Holding peripheral enable lines in inactive state during microcontroller boot-up. IC Role / Device Role: 3-state buffer holding downstream device in reset until firmware asserts OE. Use Value: OE tied to MCU reset signal ensures Y remains high-Z until initialization completes - prevents spurious peripheral activation. |
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; open-drain compatible but lacks OE control and high-Z mode | Suitable only for non-bus applications requiring pure inversion without tri-state capability | Select only if 3-state functionality is unnecessary and board layout allows pullup-dependent output |
| NC7SZ240P5X (ON Semiconductor) |
Same function and pinout; slightly higher tpd (4.5ns @ 3.3V) and lower drive (±16mA @ 3.3V) | Acceptable for lower-speed or lower-current applications where NanoFree™ footprint is not required | Use when cost sensitivity outweighs performance margin; verify thermal derating for sustained ±16mA loads |
Compared with SN74LVC1G240, the Nexperia 74LVC1G04GW omits 3-state control entirely - limiting use to point-to-point inversion - while the ON Semi NC7SZ240P5X retains full functional equivalence but trades off speed and drive strength for broader vendor availability.
Availability
SN74LVC1G240 is available at Aetrix Electronics and suitable for industrial automation interfaces, portable medical sensor hubs, and automotive body-control modules requiring stable component supply, long-term lifecycle support, and consistent NanoFree™ SC-70 packaging.
Supply support for SN74LVC1G240 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, and space-optimized IC design.
The SN74LVC1G240 belongs to TI's LVC (Low-Voltage CMOS) logic family - engineered for voltage translation, bus interfacing, and signal conditioning in battery-powered, portable, and high-density embedded systems.
FAQ
What is the maximum operating temperature range for the SN74LVC1G240?
The SN74LVC1G240 is rated for operation from –40°C to +125°C ambient temperature. This extended range supports deployment in under-hood automotive modules, industrial motor drives, and outdoor IoT gateways where thermal cycling and elevated ambient conditions are common. The device maintains specified switching characteristics and leakage limits across this full range, as validated in TI's SCES305M datasheet Section 5.3 and 5.8.
Does the SN74LVC1G240 support 5V logic inputs when powered at 3.3V?
Yes, the SN74LVC1G240 supports 5.5V-tolerant inputs - meaning it accepts input voltages up to 5.5V regardless of VCC setting. When powered at 3.3V, the A and OE pins safely interface with 5V TTL or CMOS signals without external level shifters. This capability is explicitly defined in Section 5.3 (Recommended Operating Conditions) and Section 7.3.5 (Over-Voltage Tolerant Inputs) of the official datasheet.
How should the OE pin be configured to ensure high-impedance state during power-up?
To guarantee Y remains in high-impedance during power-up or power-down, tie OE to VCC through a pullup resistor. TI recommends a value ≥10kΩ (Section 3 and 7.1), sized to accommodate the driver's current-sinking capability while minimizing static current. This prevents unintended output assertion before firmware initializes OE, avoiding bus contention or false triggering in systems like memory-mapped peripherals or shared control lines.
Can the SN74LVC1G240 drive an LED directly?
Yes, the SN74LVC1G240 can drive an LED directly via its Y output in active-low configuration (e.g., cathode to Y, anode to VCC through current-limiting resistor). With ±24mA drive capability at 3.3V and VOL ≤0.55V at 24mA (Section 5.5), it supports typical indicator LEDs drawing 5–20mA. Ensure the series resistor is calculated using (VCC − VF − VOL)/ILED to maintain compliance with absolute max ratings and thermal limits.
Is the SN74LVC1G240 pin-compatible with other SC-70 logic devices?
The SN74LVC1G240 in DCK (SC-70, 5-pin) package shares identical pinout (OE-A-GND-Y-VCC) with TI's SN74LVC1G04, SN74LVC1G07, and SN74LVC1G125 - enabling drop-in replacement for different logic functions within the same footprint. However, functional equivalence (e.g., inverting vs. non-inverting, push-pull vs. open-drain) must be verified per application; the pin mapping itself is standardized across TI's 5-pin SC-70 logic portfolio.
SN74LVC1G240DCKT 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
SN74LVC1G240DCKT FAQ
1.How can I place an order for SN74LVC1G240DCKT through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC1G240DCKT 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 SN74LVC1G240DCKT reliable?
The price and inventory of SN74LVC1G240DCKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC1G240DCKT is usually 5 days.
3.What payment methods are accepted for SN74LVC1G240DCKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC1G240DCKT transactions.
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4.How is shipping managed for SN74LVC1G240DCKT?
SN74LVC1G240DCKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC1G240DCKT 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 SN74LVC1G240DCKT?
For technical support, including SN74LVC1G240DCKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC1G240DCKT requirements.
6.How does Aetrix verify that SN74LVC1G240DCKT is sourced from the original manufacturer or authorized distributors?
All SN74LVC1G240DCKT 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 SN74LVC1G240DCKT meets industry standards.
7.What is the process for return or replacement of SN74LVC1G240DCKT?
All SN74LVC1G240DCKT units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC1G240DCKT, 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 SN74LVC1G240DCKT part is unused and in its original packaging.
Return procedure for SN74LVC1G240DCKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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