The part you are referring to, the SN74LVC125APWR, is a product manufactured by Texas Instruments (TI). This part is a quadruple buffer designed for various logic applications, using LVC technology, which stands for Low-Voltage CMOS (Complementary Metal-Oxide-Semiconductor).
Packaging Type:
The SN74LVC125APWR comes in a TSSOP-14 package, which has 14 pins.
Pin Function Specifications:
The SN74LVC125APWR is a quad buffer with three-state outputs, designed to operate with 5V CMOS logic levels while consuming low Power .
Pin Function Description (14 pins): Pin Number Pin Name Pin Function Description 1 A1 Input pin for the first buffer; receives the signal that will be buffered. 2 Y1 Output pin for the first buffer; outputs the buffered signal. 3 GND Ground pin, provides the reference ground for the IC. 4 A2 Input pin for the second buffer. 5 Y2 Output pin for the second buffer. 6 Vcc Power supply pin; supplies the IC with a 5V power source. 7 A3 Input pin for the third buffer. 8 Y3 Output pin for the third buffer. 9 GND Ground pin. 10 A4 Input pin for the fourth buffer. 11 Y4 Output pin for the fourth buffer. 12 GND Ground pin. 13 OE (Output Enable) Active-low pin that enables the output when low. When high, the output is in high impedance state. 14 Vcc Power supply pin.Functioning of the Circuit:
The SN74LVC125APWR is a quad buffer IC with separate input and output pins for each buffer. It is designed for use in high-speed digital circuits where low-power consumption and high-speed switching are required.
Inputs (A1-A4): These pins are used to receive digital signals that need to be buffered. Outputs (Y1-Y4): These pins output the buffered signals corresponding to each input pin. Output Enable Pin (OE): This active-low pin controls whether the output is active or in a high-impedance state. If OE is low, the outputs (Y1-Y4) are enabled. If OE is high, all outputs are in a high-impedance state. Power Pins (Vcc, GND): These pins provide the necessary power and ground for the chip to function.FAQ (Frequently Asked Questions) for SN74LVC125APWR:
What is the operating voltage range for the SN74LVC125APWR? The SN74LVC125APWR operates between 2V and 5.5V.
What is the output current drive capability of the SN74LVC125APWR? The output current is capable of sourcing or sinking 24 mA at Vcc = 5V.
What does the OE (Output Enable) pin do? The OE pin controls whether the outputs are enabled or in a high-impedance state. When OE is low, outputs are active.
Can I use this buffer with 3.3V logic systems? Yes, the SN74LVC125APWR can work with 3.3V logic levels because it's part of the LVC series, designed for low-voltage logic.
What is the typical propagation delay for the SN74LVC125APWR? The typical propagation delay is around 3 ns at Vcc = 5V.
What is the maximum input voltage for the SN74LVC125APWR? The input voltage should not exceed Vcc + 0.5V (i.e., it should not exceed 5.5V).
What happens if I connect an input to GND? Connecting an input to GND results in a logic low output on the corresponding output pin.
Is the SN74LVC125APWR compatible with TTL logic levels? Yes, it is TTL-compatible for logic levels 0 and 1.
How many buffers does the SN74LVC125APWR contain? It contains four independent buffers.
What are the typical applications for the SN74LVC125APWR? This part is used in a variety of logic interfacing applications, including bus drivers and logic level shifting circuits.
How does the SN74LVC125APWR handle capacitive loads? The part is designed to drive capacitive loads with minimal degradation in performance, with the outputs capable of driving up to 50 pF.
Can I use the SN74LVC125APWR in a 3.3V system? Yes, the device supports 3.3V systems, as it operates with a supply voltage range from 2V to 5.5V.
What is the typical quiescent current for the SN74LVC125APWR? The typical quiescent current is very low, around 1 µA.
Is the SN74LVC125APWR available in other package types? Yes, it is available in other packages such as SOIC and TSSOP, with the TSSOP-14 being the most common.
Can the SN74LVC125APWR operate at 1.8V? No, the minimum operating voltage is 2V, so it will not work properly at 1.8V.
What is the maximum data rate supported by the SN74LVC125APWR? The device supports a data rate of up to 100 MHz at Vcc = 5V.
What is the recommended operating temperature range for the SN74LVC125APWR? The recommended operating temperature range is from -40°C to 85°C.
Can the SN74LVC125APWR be used in automotive applications? It can be used in automotive applications within the temperature range, but it is not AEC-Q100 qualified.
How do I connect the power supply to the SN74LVC125APWR? Vcc should be connected to a 2V to 5.5V power supply, and GND should be connected to the system ground.
What should I do if the device is not responding? Check the OE pin status, ensure that the input voltages are within the acceptable range, and verify the power supply connections.
This detailed explanation covers the SN74LVC125APWR's pin functions, operating conditions, and common queries about the device. It is a highly versatile IC suitable for logic-level interfacing and buffering in various applications.