My Inquiry
My Account
Texas Instruments 74LVC1G240DCKTG4
- Part No.:
- 74LVC1G240DCKTG4
- Manufacturer:
- Texas Instruments
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
74LVC1G240DCKTG4.pdf
- Description:
- IC BUFFER INVERT 5.5V SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,124
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74LVC1G240DCKTG4 from Texas Instruments is a single inverting buffer/driver with 3-state output, designed for signal redriving 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 conditioning.
For engineers reviewing the 74LVC1G240DCKTG4 datasheet, 74LVC1G240DCKTG4 pinout, 74LVC1G240DCKTG4 application, or 74LVC1G240DCKTG4 equivalent, key selection criteria include 3-state control timing (enable/disable), Ioff support for live insertion, low ICC (≤10μA), overvoltage-tolerant inputs, and SC70-5 package compatibility with high-density PCB layouts.
Technical Context
The 74LVC1G240DCKTG4 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 output stage provides symmetrical sourcing/sinking capability up to ±24mA at 3.3V, supporting clean signal integrity into light capacitive loads (≤50pF).
It features Ioff circuitry that disables all outputs at 0V VCC, preventing back-drive current during partial power-down, and includes overvoltage-tolerant inputs rated to 5.5V independent of VCC - allowing safe interfacing with 5V signals even when powered from 1.8V or 2.5V rails.
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 redrive latency for high-speed digital paths |
| I/O Drive | ±24mA at 3.3V - sufficient to drive LEDs, transmission lines, or multiple CMOS inputs without external buffering |
| Input Voltage Tolerance | Up to 5.5V - allows direct connection to 5V controllers while powered from lower VCC, eliminating level shifters |
| Ioff Current | ±10μA max - guarantees safe live insertion and prevents back-drive damage during hot-swap or partial power-down |
| ICC (max) | 10μA - supports ultra-low-power operation in battery-backed or always-on monitoring circuits |
| Operating Temp | –40°C to +125°C - qualified for industrial and automotive under-hood environments |
Pinout & Package
74LVC1G240DCKTG4 uses the SC70-5 (DCK) package: 2.0mm × 2.1mm body, 5-pin surface-mount outline with gull-wing leads. Pin 1 is marked by a dot or bevelled corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Active-low output enable | Drives Y to high-Z when high; ties to VCC via pullup (e.g., 10kΩ) to ensure Z-state during power-up/down |
| 2 (A) | Inverting input | Accepts 0–5.5V logic levels; requires fast edge rates (≤5ns/V at 5V) to avoid oscillation |
| 3 (GND) | Ground reference | Return path for all currents; must be low-impedance and adjacent to decoupling capacitor |
| 4 (Y) | Inverting 3-state output | Drives inverted A when OE low; floats (high-Z) when OE high; not internally clamped to VCC |
| 5 (VCC) | Power supply | Supplies internal logic and output drivers; requires local 0.1μF ceramic bypass capacitor |
Key Features
| Feature | Design Value |
|---|---|
| NanoFree™ SC70-5 package | 2.0mm × 2.1mm footprint - saves >50% board area vs. SOT-23-5, ideal for wearables and compact modules |
| 5.5V-tolerant inputs | Enables direct interfacing with legacy 5V logic without external level translators or voltage dividers |
| Ioff protection | Prevents current flow between powered/unpowered sections - critical for modular systems with hot-pluggable boards |
| Low ICC (≤10μA) | Reduces quiescent power in always-on signal conditioning nodes, extending battery life in IoT endpoints |
| ±24mA drive @ 3.3V | Supports driving 10+ standard CMOS inputs or short PCB traces (<12cm) without signal degradation |
Applications
| LED Indicator Control | Digital Signal Redriving |
|---|---|
Use Scenario: Driving an LED from a low-drive MCU GPIO pin with current limiting. IC Role / Device Role: Inverting buffer with 3-state output used as active-low LED driver (Y sinks current when OE low and A high). Use Value: Eliminates need for discrete transistor; ±24mA drive directly supports common indicator LEDs at 3.3V without series resistor optimization. |
Use Scenario: Reconditioning degraded clock or data edges before routing to multiple receivers. IC Role / Device Role: Single inverting buffer isolating and strengthening a weak signal path on a dense PCB. Use Value: 3.7ns tpd and low output impedance maintain signal integrity across 50pF loads, reducing jitter accumulation. |
| Controller Reset Hold | Transmission Line Driving |
Use Scenario: Holding a peripheral's enable line low during system reset until firmware releases control. IC Role / Device Role: 3-state buffer holding Y low (via OE control) while isolating upstream controller from downstream device capacitance. Use Value: Prevents unintended peripheral activation during boot; Ioff ensures no leakage current flows when VCC is off. |
Use Scenario: Driving a 50Ω PCB trace carrying a 10–50MHz digital signal to an ADC or FPGA input. IC Role / Device Role: Low-skew inverting driver providing source termination and impedance matching. Use Value: ±24mA drive and fast edge rates minimize reflections; SC70-5 placement near trace origin reduces stub length. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar inverting 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC1G04DCKR | No 3-state output; fixed inverter only - lacks OE control and high-Z mode | Cannot isolate buses or hold signals; suitable only for permanent inversion paths | Select only if 3-state functionality is unnecessary and board layout allows fixed logic inversion |
| 74LVC1G125DCKRG4 | Non-inverting 3-state buffer - identical pinout, timing, and drive specs but no inversion | Used where signal polarity must be preserved (e.g., clock forwarding, data passthrough) | Choose when functional requirement is buffer + enable, not inversion + enable |
Compared with 74LVC1G240DCKTG4, SN74LVC1G04DCKR removes bus isolation capability entirely, while 74LVC1G125DCKRG4 retains full electrical compatibility but changes logic function - making it a drop-in replacement only when inversion is not required.
Availability
74LVC1G240DCKTG4 is available at Aetrix Electronics and suitable for industrial control I/O expansion, portable medical sensor interfaces, and automotive body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74LVC1G240DCKTG4 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 product line delivers miniature, high-speed, 3-state logic buffers for space- and power-constrained digital interfaces - targeting portable electronics, industrial automation, and automotive subsystems.
FAQ
What is the maximum operating temperature for the 74LVC1G240DCKTG4?
The 74LVC1G240DCKTG4 is rated for continuous operation from –40°C to +125°C ambient temperature. This extended range supports deployment in under-hood automotive modules, industrial motor drives, and outdoor environmental sensors where thermal stress is significant. The SC70-5 package's thermal metrics (RθJA = 371°C/W) require careful PCB copper pour design to sustain full-spec performance at upper temperature limits.
Does the 74LVC1G240DCKTG4 support 5V logic inputs when powered from 3.3V?
Yes, the 74LVC1G240DCKTG4 supports input voltages up to 5.5V regardless of VCC level - including when powered from 3.3V. This overvoltage tolerance eliminates external level-shifting components when interfacing with 5V microcontrollers or legacy peripherals. However, output swing remains limited to VCC (3.3V), so downstream devices must accept 3.3V logic levels.
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/down, tie OE to VCC through a pullup resistor - typically 10kΩ - as specified in TI's application guidance. This ensures OE is high (disabling Y) before internal circuitry stabilizes. Direct connection to VCC is insufficient because OE may float transiently; the resistor provides deterministic bias while accommodating the driver's current-sinking capability.
Can the 74LVC1G240DCKTG4 drive a 50Ω transmission line directly?
The 74LVC1G240DCKTG4 can drive short 50Ω traces (≤10cm) with acceptable signal integrity due to its ±24mA drive strength at 3.3V, but source termination is recommended. For reliable impedance matching, add a 22–33Ω series resistor between Y and the trace. This damps reflections without overloading the output, especially critical for edges faster than 3.7ns and frequencies above 10MHz.
Is the 74LVC1G240DCKTG4 pin-compatible with other SC70-5 logic devices?
Yes, the 74LVC1G240DCKTG4 shares the standard SC70-5 (DCK) footprint and pinout (OE-A-GND-Y-VCC) with TI's SN74LVC1G125, SN74LVC1G04, and SN74LVC1G07 families. This enables layout reuse across functional variants - for example, swapping in a non-inverting buffer or open-drain driver without PCB revision - provided routing and decoupling meet each device's specific timing and drive requirements.
74LVC1G240DCKTG4 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, 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
74LVC1G240DCKTG4 FAQ
1.How can I place an order for 74LVC1G240DCKTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVC1G240DCKTG4 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 74LVC1G240DCKTG4 reliable?
The price and inventory of 74LVC1G240DCKTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVC1G240DCKTG4 is usually 5 days.
3.What payment methods are accepted for 74LVC1G240DCKTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVC1G240DCKTG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVC1G240DCKTG4?
74LVC1G240DCKTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVC1G240DCKTG4 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 74LVC1G240DCKTG4?
For technical support, including 74LVC1G240DCKTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVC1G240DCKTG4 requirements.
6.How does Aetrix verify that 74LVC1G240DCKTG4 is sourced from the original manufacturer or authorized distributors?
All 74LVC1G240DCKTG4 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 74LVC1G240DCKTG4 meets industry standards.
7.What is the process for return or replacement of 74LVC1G240DCKTG4?
All 74LVC1G240DCKTG4 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVC1G240DCKTG4, 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 74LVC1G240DCKTG4 part is unused and in its original packaging.
Return procedure for 74LVC1G240DCKTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74LVC1G240DCKTG4 Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
