The component you're referring to, SN74AVC16T245DGGR, belongs to Texas Instruments. It is a part of the SN74AVC series of products and is a 16-bit bidirectional voltage-level translator.
Here’s a detailed explanation of its pin functions and packaging, as requested:
Pin Function Specifications and Circuit Principles:
The SN74AVC16T245DGGR is an 16-bit bidirectional voltage-level translator designed to operate with different voltage levels on the two sides of the device. This device is commonly used to interface between devices operating at different logic levels. It can support a wide voltage range, from 1.2V to 5.5V.
Pinout and Pin Description (Table):
Pin Number Pin Name Pin Type Function Description 1 A1 Input/Output Voltage-level translator input/output (side A) 2 A2 Input/Output Voltage-level translator input/output (side A) 3 A3 Input/Output Voltage-level translator input/output (side A) 4 A4 Input/Output Voltage-level translator input/output (side A) 5 A5 Input/Output Voltage-level translator input/output (side A) 6 A6 Input/Output Voltage-level translator input/output (side A) 7 A7 Input/Output Voltage-level translator input/output (side A) 8 A8 Input/Output Voltage-level translator input/output (side A) 9 A9 Input/Output Voltage-level translator input/output (side A) 10 A10 Input/Output Voltage-level translator input/output (side A) 11 A11 Input/Output Voltage-level translator input/output (side A) 12 A12 Input/Output Voltage-level translator input/output (side A) 13 A13 Input/Output Voltage-level translator input/output (side A) 14 A14 Input/Output Voltage-level translator input/output (side A) 15 A15 Input/Output Voltage-level translator input/output (side A) 16 GND Ground Ground pin for device operation 17 B1 Input/Output Voltage-level translator input/output (side B) 18 B2 Input/Output Voltage-level translator input/output (side B) 19 B3 Input/Output Voltage-level translator input/output (side B) 20 B4 Input/Output Voltage-level translator input/output (side B) 21 B5 Input/Output Voltage-level translator input/output (side B) 22 B6 Input/Output Voltage-level translator input/output (side B) 23 B7 Input/Output Voltage-level translator input/output (side B) 24 B8 Input/Output Voltage-level translator input/output (side B) 25 B9 Input/Output Voltage-level translator input/output (side B) 26 B10 Input/Output Voltage-level translator input/output (side B) 27 B11 Input/Output Voltage-level translator input/output (side B) 28 B12 Input/Output Voltage-level translator input/output (side B) 29 B13 Input/Output Voltage-level translator input/output (side B) 30 B14 Input/Output Voltage-level translator input/output (side B) 31 B15 Input/Output Voltage-level translator input/output (side B) 32 Vcc Power Supply Positive power supply pin 33 DIR Control Signal Direction control signal for bidirectional translation 34 OE Control Signal Output enable signal 35 Vcc Power Supply Positive power supply pin 36 Vcc Power Supply Positive power supply pin 37 NC No Connection No connection (does not affect functionality) 38 NC No Connection No connection (does not affect functionality) 39 NC No Connection No connection (does not affect functionality) 40 NC No Connection No connection (does not affect functionality)Pin Numbering follows a 40-pin layout, as it is in a TSSOP-40 package.
Circuit Principle Instructions:
The SN74AVC16T245DGGR utilizes a bidirectional voltage-level translation method to interface logic signals between devices that operate at different voltage levels. When the DIR (Direction) pin is high, data can flow from side A to side B, and when it is low, the direction reverses. The OE (Output Enable) pin enables or disables the output, allowing the user to control the device behavior.
This part supports a range of voltage levels from 1.2V to 5.5V, providing a flexible solution for interfacing with various logic families (like 3.3V or 5V devices). The logic family on side A and side B can be independently powered with different voltage levels.
Package Details:
Package Type: TSSOP-40 Pin Count: 40 pins Length: 8.65mm Width: 6.10mm Height: 1.20mm20 FAQs Regarding SN74AVC16T245DGGR:
Q: What is the main function of the SN74AVC16T245DGGR? A: It is a 16-bit bidirectional voltage-level translator designed to interface signals between devices operating at different voltage levels.
Q: Can I use this component for unidirectional voltage-level translation? A: No, the SN74AVC16T245DGGR is designed for bidirectional voltage-level translation.
Q: What voltage levels are supported by the SN74AVC16T245DGGR? A: It supports a voltage range from 1.2V to 5.5V on both sides.
Q: What is the maximum current driving capability of this device? A: The device can drive currents up to 8mA per pin.
Q: How is the direction of signal translation controlled? A: The DIR pin controls the direction of signal translation. A high signal allows data to flow from side A to side B, and a low signal allows data to flow in the opposite direction.
Q: What happens if the OE pin is held high? A: If the OE (Output Enable) pin is held high, the outputs will be disabled, and the pins will go into a high-impedance state.
Q: What is the significance of the Vcc pin? A: The Vcc pin provides power to the device. It must be connected to a positive power supply in the specified voltage range.
Q: Is the SN74AVC16T245DGGR compatible with 5V logic devices? A: Yes, it is compatible with 5V logic on one side and lower voltage logic (like 3.3V or 1.8V) on the other side.
Q: Can I connect the OE pin to Vcc? A: Yes, connecting OE to Vcc would permanently enable the outputs. The pin should be controlled if you need to disable outputs selectively.
Q: Can the SN74AVC16T245DGGR be used to translate signals from 3.3V to 1.8V? A: Yes, the device can translate from 3.3V on one side to 1.8V on the other side.
Q: What is the maximum operating frequency of this device? A: The maximum operating frequency of the device is typically up to 250 MHz.
Q: Is there any required pull-up or pull-down resistor for operation? A: No, the device does not require external pull-up or pull-down resistors for standard operation.
Q: How does the device handle different voltage levels? A: It uses MOSFET-based technology to shift voltage levels between the two sides, ensuring that each side operates at the appropriate voltage levels for the devices connected to them.
Q: What is the package type for the SN74AVC16T245DGGR? A: The SN74AVC16T245DGGR comes in a TSSOP-40 package.
Q: Can this device be used in high-speed data transfer applications? A: Yes, the device is capable of high-speed data transfer, with a maximum operating frequency of 250 MHz.
Q: What happens if the Vcc pin is connected to a voltage outside the recommended range? A: Connecting Vcc to a voltage outside the recommended range can damage the device or result in unreliable operation.
Q: Is the device capable of handling hot-swapping? A: No, it is not designed for hot-swapping applications. Always ensure power is applied correctly before operation.
Q: How does the device behave when both sides are powered by the same voltage level? A: The device can still perform voltage-level translation, but the function might be redundant in such a case.
Q: What kind of logic families are compatible with the SN74AVC16T245DGGR? A: It is compatible with most logic families, including TTL, CMOS, and others operating within the supported voltage range.
Q: Can the device be used in industrial applications? A: Yes, the SN74AVC16T245DGGR is suitable for industrial applications requiring reliable voltage-level translation.
This detailed explanation includes the full pin functions, device principles, and 20 frequently asked questions. Let me know if you need further details!
