The part number SN74AVC8T245RHLR belongs to Texas Instruments (TI). This specific IC is a 8-bit dual-supply bus transceiver with direction control. The part is designed to provide bidirectional voltage translation between different voltage domains, enabling communication between systems with different I/O voltage levels.
Key Information About SN74AVC8T245RHLR:
Brand: Texas Instruments IC Type: 8-bit dual-supply bus transceiver Package Type: RHLR refers to the TSSOP (Thin Shrink Small Outline Package) with a 20-pin configuration.Pin Function Description for SN74AVC8T245RHLR:
The SN74AVC8T245RHLR package has a total of 20 pins. Below is a complete list of the functions for each pin. Every pin function is described in detail.
Pin Number Pin Name Function Description 1 A1 Data Input/Output A (Bus Transceiver) 2 A2 Data Input/Output A (Bus Transceiver) 3 A3 Data Input/Output A (Bus Transceiver) 4 A4 Data Input/Output A (Bus Transceiver) 5 A5 Data Input/Output A (Bus Transceiver) 6 A6 Data Input/Output A (Bus Transceiver) 7 A7 Data Input/Output A (Bus Transceiver) 8 A8 Data Input/Output A (Bus Transceiver) 9 GND Ground pin. The reference point for voltage. 10 DIR Direction control input. If high, A-to-B direction is selected; if low, B-to-A direction is selected. 11 OE Output Enable control. If low, outputs are enabled; if high, outputs are in high impedance state. 12 VCC Power supply pin for the A bus side. 13 B8 Data Input/Output B (Bus Transceiver) 14 B7 Data Input/Output B (Bus Transceiver) 15 B6 Data Input/Output B (Bus Transceiver) 16 B5 Data Input/Output B (Bus Transceiver) 17 B4 Data Input/Output B (Bus Transceiver) 18 B3 Data Input/Output B (Bus Transceiver) 19 B2 Data Input/Output B (Bus Transceiver) 20 B1 Data Input/Output B (Bus Transceiver)Circuit Principle:
This IC is designed to be a bidirectional bus transceiver that supports dual-supply operation. The key feature of this chip is its ability to interface with two separate voltage domains (for example, 3.3V and 5V systems). The direction of data flow can be controlled via the DIR pin, allowing for data transfer from A to B or B to A.
The A pins (A1 to A8) and B pins (B1 to B8) are the data transmission lines. They allow the chip to transmit data in either direction. The OE pin is used to enable or disable the outputs, ensuring that the transceiver only drives data when necessary, reducing the risk of interference or driving signals in the wrong direction.FAQ (20 Common Questions About SN74AVC8T245RHLR):
What is the main function of the SN74AVC8T245RHLR? The main function is to act as a dual-supply, 8-bit bidirectional bus transceiver with direction control, allowing voltage translation between two different voltage systems.
How does the direction control work on this IC? The DIR pin controls the data direction. When DIR is high, data flows from A to B. When DIR is low, data flows from B to A.
What happens when the OE pin is high? When OE (Output Enable) is high, the outputs are in a high-impedance state, essentially disabling the outputs.
How many pins does the SN74AVC8T245RHLR have? The SN74AVC8T245RHLR has 20 pins.
What is the supply voltage for this IC? The IC can operate with a supply voltage range of 1.65V to 3.6V on the A side and 1.65V to 5.5V on the B side.
Can this IC be used for both 3.3V and 5V systems? Yes, the IC supports voltage translation between different systems, so it can be used for both 3.3V and 5V systems.
What type of package is SN74AVC8T245RHLR? The package is a TSSOP-20 (Thin Shrink Small Outline Package), which is a surface-mount type with 20 pins.
How do you control the direction of data flow? The direction is controlled by the DIR pin. A high logic level causes data to flow from A to B, while a low logic level causes data to flow from B to A.
Can I use the SN74AVC8T245RHLR for high-speed applications? Yes, the IC supports high-speed data transmission, but you must consider the capacitance and the length of the traces when using it for high-speed designs.
What does the GND pin do? The GND pin is the ground reference for the IC. It provides a return path for the current flowing through the device.
Can I use the IC to interface two microcontrollers? Yes, this IC can be used to interface two microcontrollers with different voltage levels, facilitating bidirectional data communication.
What is the maximum current the IC can drive? The IC can drive a maximum of 8mA per pin in the high or low state, but it is best to refer to the datasheet for specific conditions.
What happens if I leave the OE pin unconnected? If OE is left unconnected, the output behavior will be undefined. You should always connect it to either a logic high or low signal to control the output.
What is the significance of VCC and GND pins? The VCC pin is for the power supply to the A side, while the GND pin is for the ground reference. Proper voltage supply and grounding are essential for the IC's operation.
How does this IC protect against voltage spikes? The IC incorporates internal protection circuitry to prevent damage from voltage spikes, but you should ensure the supply voltage is within the specified range.
Is the SN74AVC8T245RHLR suitable for automotive applications? Yes, Texas Instruments typically offers parts suitable for automotive applications, but you should check for extended temperature ranges and certifications in the datasheet.
Can this IC be used for level shifting? Yes, it is designed for level shifting between two voltage domains, making it perfect for applications where voltage compatibility is necessary.
What is the output logic level for this IC? The output logic levels depend on the supply voltage. For example, with a 3.3V supply, the logic high output is close to 3.3V, and the logic low is near 0V.
How does this IC behave when the supply voltage is low? If the supply voltage is too low, the IC may not function correctly. The recommended operating voltage range is from 1.65V to 3.6V for the A side and 1.65V to 5.5V for the B side.
What is the recommended operating temperature range for the SN74AVC8T245RHLR? The typical operating temperature range is from -40°C to +85°C, but it's important to check the datasheet for specific conditions.
This detailed explanation gives a complete overview of the SN74AVC8T245RHLR and its pin functions. Let me know if you need any additional information!