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Home > Products > Integrated Circuits (ICs) > Logic > Buffers, Drivers, Receivers, Transceivers

STMicroelectronics 74LX1G07CTR

Name: 74LX1G07CTR
Brand: STMicroelectronics
SKU: 74LX1G07CTR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74LX1G07CTR

Manufacturer:: STMicroelectronics

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 5-TSSOP, SC-70-5, SOT-353

Datasheet:: 74LX1G07CTR.pdf

Description:: IC BUF NON-INVERT 5.5V SOT323-5

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Product details

Overview

74LX1G07CTR from STMicroelectronics is a single non-inverting buffer with open-drain output, designed for level-shifting and wired-OR logic interfacing between 1.65V–5.5V domains. It features 5V-tolerant inputs (0–7V), 4.2ns max propagation delay at 3.3V, 1µA max ICC at 25°C, and power-down protection on both input and output. It is used in I²C bus pull-up interfaces and mixed-voltage GPIO translation.

For engineers reviewing the 74LX1G07CTR datasheet, 74LX1G07CTR pinout, 74LX1G07CTR application, or 74LX1G07CTR equivalent, key selection criteria include open-drain drive capability, 5V-tolerant input voltage range, low quiescent current, and SOT323-5L package compatibility with space-constrained PCB layouts.

Technical Context

The 74LX1G07CTR implements a two-stage CMOS buffer with open-drain output, enabling bidirectional signal translation without internal pull-ups. Its input stage accepts voltages up to 7V regardless of VCC, and its output remains high-impedance when VCC = 0V - critical for hot-swap and power-gated subsystems.

It uses sub-micron C2MOS technology with double-layer metal wiring, delivering latch-up immunity >200 mA and stable operation across –55°C to +125°C. The device supports data retention down to 1.2V and guarantees truth table functionality from 1.2V to 3.6V.

Key Specifications

Parameter	Value and Actual Design Meaning
VCC Range	1.65V to 5.5V - enables direct use in 1.8V, 2.5V, 3.3V, and 5V systems without level shifters
tPD (Max)	4.2ns at VCC = 3.0–3.6V - supports >100 MHz digital timing margins in fast control paths
IOL (Max)	24mA at VCC = 3.0–3.6V - drives standard 3.3V I²C bus loads (400pF, 3mA sink) with margin
VI Input Range	0V to 7V independent of VCC - allows safe connection to 5V signals while powered from 1.8V
ICC (Max)	1µA at TA = 25°C - minimizes standby power in battery-backed or always-on sensor nodes
IOZ Leakage	±10µA at VI/VO = 0–5.5V - ensures reliable high-impedance state during power-down sequencing

Pinout & Package

SOT323-5L package: ultra-small surface-mount outline (1.80 × 2.40 mm body, 0.65 mm pitch), optimized for high-density portable and IoT PCBs. Pin 1 is NC (not connected); pin 2 is input (1A); pin 3 is GND; pin 4 is open-drain output (1Y); pin 5 is VCC.

Pin/Terminal	Circuit Role	Design Meaning
1	NC	No internal connection - must be left floating or grounded per layout best practice; no electrical function
2	1A	CMOS-compatible input with 5V tolerance - accepts 0–7V logic levels regardless of VCC value
3	GND	Reference ground for all internal circuitry - requires low-inductance connection to system ground plane
4	1Y	Open-drain NMOS output - requires external pull-up to define high state; sinks up to 24mA at 3.3V
5	VCC	Positive supply rail - powers internal logic; supports 1.65–5.5V; decoupling capacitor required near pin

Key Features

Feature	Design Value
5V-tolerant input	Accepts 0–7V input regardless of VCC - eliminates need for external clamping diodes in mixed-voltage designs
Power-down protection	Input and output remain protected when VCC = 0V - prevents back-powering and latch-up during partial power cycling
Low ICC quiescent current	≤1µA at 25°C - extends battery life in always-listening edge devices and real-time clock supervisors
Wide operating temperature	–55°C to +125°C - qualified for automotive under-hood, industrial motor control, and outdoor infrastructure applications

Applications

I²C Bus Level Translation

GPIO Voltage Translation

Use Scenario: Interfacing a 3.3V microcontroller I²C controller with a 5V sensor node on the same bus.

IC Role / Device Role / Timing Role: Open-drain buffer providing bidirectional signal translation while maintaining I²C protocol compliance.

Use Value: Eliminates need for discrete MOSFET translators; supports standard-mode (100 kHz) and fast-mode (400 kHz) timing with <4.2ns delay.

Use Scenario: Connecting a 1.8V FPGA bank to a 3.3V peripheral's enable line.

IC Role / Device Role / Timing Role: Single-channel level shifter with 5V-tolerant input and open-drain output for flexible pull-up configuration.

Use Value: Enables safe interface without risk of overvoltage damage; supports 1.65–5.5V VCC for design reuse across multiple platforms.

Hot-Swappable Module Interface

Power Sequencing Monitor Output

Use Scenario: Isolating a hot-plug module's status signal from a mainboard powered by different rail.

IC Role / Device Role / Timing Role: Buffer with power-down protection ensuring signal integrity during insertion/removal events.

Use Value: Prevents backfeeding into unpowered sections; maintains high-Z output when VCC is off - critical for PCIe M.2 and USB-C accessory detection.

Use Scenario: Driving an LED indicator or fault flag from a power management IC with variable supply voltage.

IC Role / Device Role / Timing Role: Open-drain driver translating PMIC alert signals to system-level indicators with configurable pull-up voltage.

Use Value: Allows pull-up to any rail (1.8V–5V); 24mA sink capability ensures bright LED drive without additional transistor stage.

Equivalent & Alternatives

The following parts are listed as comparable options for similar open-drain buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC1G07DBVR	Higher IOL (32mA @ 3.3V), but only 5.5V max VI (not 7V tolerant); no power-down protection on output	Lacks VCC-independent input tolerance - requires careful voltage domain isolation in hot-swap use cases	Preferred where higher drive strength is needed and 7V input tolerance is unnecessary
NC7SZ07P5X	Smaller SOT-353 package (1.25×2.1mm), lower CPD (12pF), but only rated to 125°C (no –55°C spec)	Not qualified for extended temperature industrial or automotive environments	Selected for ultra-compact consumer wearables where full temp range is not required

Compared with SN74LVC1G07DBVR and NC7SZ07P5X, the 74LX1G07CTR uniquely combines 7V input tolerance, power-down protection, and –55°C qualification - making it the only choice for robust mixed-rail industrial control and automotive body electronics.

Availability

74LX1G07CTR is available at Aetrix Electronics and suitable for I²C bus translation, GPIO voltage adaptation, and hot-swap module signaling requiring stable component supply across automotive, industrial automation, and IoT edge device programs.

Supply support for 74LX1G07CTR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in microcontrollers, power management, analog, and automotive-grade ICs with vertical manufacturing and broad industrial certification coverage.

The 74LX series targets low-voltage, high-noise-immunity logic interfacing - specifically engineered for mixed-supply systems requiring robust level translation, power sequencing resilience, and extended temperature reliability.

FAQ

Can 74LX1G07CTR be used with VCC = 0V?

Yes - the device provides power-down protection on both input and output. When VCC = 0V, the input accepts 0–7V signals without damage, and the output remains in high-impedance state with ±10µA leakage. This enables safe use in hot-swap and partial-power-down architectures without external protection circuitry.

What is the maximum sink current at 1.8V VCC?

At VCC = 1.65–2.3V, the 74LX1G07CTR guarantees IOL ≥ 4mA with VOL ≤ 0.45V (tested at IO = 4mA). This is sufficient to drive standard logic inputs and low-current LEDs, though higher sink capability requires VCC ≥ 2.7V per datasheet AC specs.

Is Pin 1 (NC) required to be tied to ground?

No - Pin 1 is internally not connected and has no electrical function. STMicroelectronics' mechanical drawings and application notes specify it may be left floating or grounded based on PCB routing convenience; neither choice affects performance, reliability, or EMI behavior.

Does this device support I²C fast-mode plus (1 Mbps)?

No - while the 4.2ns propagation delay at 3.3V suggests high-speed capability, the 74LX1G07CTR lacks guaranteed rise/fall time specs below 20ns and is not characterized for 1 Mbps I²C. It is validated for standard-mode (100 kHz) and fast-mode (400 kHz) with appropriate pull-up sizing and bus capacitance ≤ 400pF.

74LX1G07CTR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: 74LX

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:: Open Drain

Current - Output High, Low:: -, 32mA

Voltage - Supply:: 1.65V ~ 5.5V

Operating Temperature:: -55°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-323-5

74LX1G07CTR FAQ

1.How can I place an order for 74LX1G07CTR through Aetrix?

Please submit a Request for Quotation (RFQ) for 74LX1G07CTR 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 74LX1G07CTR reliable?

The price and inventory of 74LX1G07CTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LX1G07CTR is usually 5 days.

3.What payment methods are accepted for 74LX1G07CTR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LX1G07CTR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74LX1G07CTR?

74LX1G07CTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74LX1G07CTR 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 74LX1G07CTR?

For technical support, including 74LX1G07CTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LX1G07CTR requirements.

6.How does Aetrix verify that 74LX1G07CTR is sourced from the original manufacturer or authorized distributors?

All 74LX1G07CTR 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 74LX1G07CTR meets industry standards.

7.What is the process for return or replacement of 74LX1G07CTR?

All 74LX1G07CTR units undergo pre-shipment inspection (PSI). If there is an issue with 74LX1G07CTR, 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 74LX1G07CTR part is unused and in its original packaging.

Return procedure for 74LX1G07CTR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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