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Product attributes Property Value
Manufacturer Fairchild Semiconductor
Product Series 74LCX
Packaging Bulk |
Part Status Active
Logic Type Buffer, Non-Inverting
Number of Elements 6
Number of Bits per Element 1
Input Type -
Output Type Open Drain
Current - Output High, Low -, 32mA
Voltage - Supply 2V ~ 5.5V
Operating Temperature -40°C ~ 85°C (TA)
Grade -
Qualification -
Mounting Type Surface Mount
Package / Case 14-SOIC (0.209", 5.30mm Width)
Supplier Device Package 14-SOP
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The 74LCX07SJX from Fairchild Semiconductor is a hex non-inverting buffer with open-drain outputs, part of the 74LCX low-voltage CMOS family. It operates from 2V to 5.5V and can sink up to 32mA per channel. The open-drain outputs allow for level shifting and wired-OR logic configurations. The device is available in a 14-SOIC package and is characterized for operation from -40°C to 85°C. Typical applications include I2C bus buffering, LED driving, and level shifting in mixed-voltage systems.

  • Open-Drain Outputs: Enable level shifting and wired-OR logic, providing design flexibility for mixed-voltage systems.
  • High 32mA Sink Current: Can directly drive LEDs, relays, or other loads without additional driver circuitry.
  • Wide 2V to 5.5V Supply Range: Compatible with both 3.3V and 5V logic, simplifying system integration.
  • 6 Channels in a Compact SOIC Package: Saves board space while providing multiple buffered signals.

Level Shifting with Open-Drain Outputs

Open-drain outputs allow the 74LCX07SJX to shift voltage levels by connecting the pull-up resistor to a different supply voltage. For example, a 3.3V logic signal can be shifted to 5V by pulling up to 5V.

Wired-OR Logic Implementation

Multiple open-drain outputs can be connected together to form a wired-OR configuration, commonly used in interrupt lines or bus request signals, where any device can pull the line low.

Driving LEDs and Relays

With a 32mA sink capability, each channel can directly drive LEDs or small relays, making it useful for indicator lights and control outputs in consumer electronics.

I2C and SMBus Signal Buffering

Open-drain outputs are essential for I2C and SMBus communication. This buffer can be used to extend bus length or increase fan-out while maintaining the required open-drain protocol.

Industrial Sensor Interfacing

In industrial control systems, sensors often use open-drain outputs. This buffer can condition and isolate these signals for the main controller, improving noise immunity.

Automotive Lighting Control

With a temperature range of -40°C to 85°C, this buffer can be used in automotive lighting modules to drive indicator LEDs or control signals, providing reliable operation.

Q: What logic family is the 74LCX07SJX?
A: It belongs to the 74LCX low-voltage CMOS family, operating from 2V to 5.5V.
Q: What is the function of this IC?
A: It is a hex (6-channel) non-inverting buffer with open-drain outputs.
Q: How many channels does it have?
A: It has 6 independent buffer channels.
Q: What is the output type?
A: Open-drain outputs, requiring an external pull-up resistor for high-level output.
Q: What is the voltage range?
A: 2V to 5.5V, allowing use in both 3.3V and 5V systems.
Q: What package is available?
A: 14-SOIC (0.209", 5.30mm Width).
Base Product Number : 74LCX07
14-SOIC 2V-5.5V 74LCX Buffer I2C Industrial LED Driver Level Shifting Logic IC Open Drain
Q: What logic family is the 74LCX07SJX?
A: It belongs to the 74LCX low-voltage CMOS family, operating from 2V to 5.5V.
Q: What is the function of this IC?
A: It is a hex (6-channel) non-inverting buffer with open-drain outputs.
Q: How many channels does it have?
A: It has 6 independent buffer channels.
Q: What is the output type?
A: Open-drain outputs, requiring an external pull-up resistor for high-level output.
Q: What is the voltage range?
A: 2V to 5.5V, allowing use in both 3.3V and 5V systems.
Q: What package is available?
A: 14-SOIC (0.209", 5.30mm Width).