The model "SN74LVC1G07DCKR" belongs to Texas Instruments (TI), which is a major manufacturer of semiconductors and electronic components. This specific part is a logic buffer with open-drain output, designed to work at low voltage logic levels (LVC).
Package Type:
Package Type: DCKR Package: SOT-23-5 (5-pin package)Pin Function Specifications and Detailed Circuit Principle:
The "SN74LVC1G07DCKR" chip is housed in a 5-pin package with each pin having a specific function. Below is the detailed explanation of the pin functions.
Pin Pin Name Function Description 1 Vcc Power supply input pin. Typically powered by a voltage of 1.65V to 5.5V. 2 A Input pin for the logic signal that is to be buffered or passed through to the output. 3 GND Ground pin. Connect to system ground for proper operation. 4 Y Open-drain output. The output is active low, meaning it pulls to ground when enabled. 5 OE (Output Enable) Output enable pin. When low, the output is enabled; when high, the output is disabled (high-impedance state).Detailed Pin Function List (5 pins total):
Pin 1 (Vcc): This is the power supply pin, which should be connected to the positive supply voltage. It powers the IC and determines the logic levels used by the device.
Pin 2 (A): This is the logic input pin. A signal applied to this pin will be passed through to the output, depending on the state of the Output Enable (OE) pin. The signal at input A is buffered and directed to the open-drain output Y.
Pin 3 (GND): The ground pin must be connected to the system ground. It serves as the reference point for the power supply and ensures the IC operates correctly.
Pin 4 (Y): This is the open-drain output pin. The output is driven low (pulled to ground) when the input is active, and it is in a high-impedance state when not enabled. This allows for wire-AND logic when multiple open-drain outputs are connected together.
Pin 5 (OE - Output Enable): The Output Enable (OE) pin controls whether the output is active or high-impedance. When OE is low, the Y output reflects the input signal A, but when OE is high, the output goes into a high-impedance state, essentially disconnecting it from the circuit.
Circuit Principle:
The SN74LVC1G07DCKR operates as a logic buffer with open-drain output. It amplifies the input signal applied at pin A and, depending on the status of the OE pin, either outputs the signal on pin Y or disables the output by setting it in a high-impedance state.
This type of buffer is particularly useful when multiple devices are connected to a common line and you need to control the logic signal from multiple outputs without risking short circuits. The open-drain configuration allows for the use of external pull-up resistors, which is necessary for generating a valid logic high level when the output is not pulling the line low.
Frequently Asked Questions (FAQ) - Top 20 Questions:
Q1: What is the SN74LVC1G07DCKR device? A1: The SN74LVC1G07DCKR is a logic buffer IC with an open-drain output, manufactured by Texas Instruments.
Q2: How many pins does the SN74LVC1G07DCKR have? A2: The SN74LVC1G07DCKR has a 5-pin SOT-23 package.
Q3: What is the function of the Vcc pin? A3: The Vcc pin is the power supply input, typically ranging from 1.65V to 5.5V.
Q4: What does the A pin do? A4: The A pin is the logic input that receives the signal to be buffered or passed to the output.
Q5: What is the purpose of the GND pin? A5: The GND pin serves as the ground reference and is essential for the proper operation of the IC.
Q6: What does the Y pin do? A6: The Y pin is the open-drain output. It reflects the input signal when Output Enable (OE) is low and is high-impedance when OE is high.
Q7: What is the role of the OE (Output Enable) pin? A7: The OE pin controls whether the output (Y) is active (low) or in a high-impedance state.
Q8: What is the open-drain output? A8: An open-drain output can pull the line low, but does not drive it high. External pull-up resistors are used to generate the high level when the output is not active.
Q9: Can the SN74LVC1G07DCKR be used in 5V systems? A9: Yes, the device is compatible with voltages ranging from 1.65V to 5.5V, making it suitable for 5V systems.
Q10: Is it possible to connect multiple SN74LVC1G07DCKR outputs together? A10: Yes, you can connect multiple open-drain outputs together for wire-AND logic, but each output must have an external pull-up resistor.
Q11: What is the recommended pull-up resistor value for the SN74LVC1G07DCKR? A11: A typical value for the pull-up resistor is 10kΩ, but it depends on the specific application.
Q12: How do I use the SN74LVC1G07DCKR in a circuit? A12: To use the SN74LVC1G07DCKR, apply the logic signal to pin A, connect the Vcc to the appropriate supply voltage, and connect GND to ground. Use the OE pin to control the output.
Q13: How much current can the output drive? A13: The open-drain output can sink up to 24mA, but it cannot source current.
Q14: What is the propagation delay for the SN74LVC1G07DCKR? A14: The typical propagation delay is around 3.3ns at Vcc = 5V, but this can vary depending on the operating conditions.
Q15: Can the SN74LVC1G07DCKR drive inductive loads? A15: No, the SN74LVC1G07DCKR is not designed for driving inductive loads directly.
Q16: Can the device be used in TTL-level systems? A16: Yes, the SN74LVC1G07DCKR is compatible with TTL logic levels when powered by 5V.
Q17: How does the SN74LVC1G07DCKR handle noise? A17: The device is designed for low voltage applications and has built-in noise immunity, which ensures reliable performance in noisy environments.
Q18: What happens when the OE pin is high? A18: When the OE pin is high, the output Y goes into a high-impedance state, effectively disconnecting it from the circuit.
Q19: Can the SN74LVC1G07DCKR be used in automotive applications? A19: Yes, the device is suitable for automotive applications as it operates within a wide voltage range (1.65V to 5.5V) and is robust.
Q20: What is the maximum output current for the SN74LVC1G07DCKR? A20: The maximum output current when the output is low is 24mA, and the device should not be used to source current.
This overview and FAQ cover the key details of the SN74LVC1G07DCKR. The device is straightforward, but important for various low-voltage logic applications requiring open-drain logic level shifting or buffering.
