The model " SN74ALVC164245DL R" is a product from Texas Instruments, a well-known brand in the semiconductor industry. It is a part of the SN74 series, which includes logic devices such as buffers, transceiver s, and shift registers.
Package Type:
The "DLR" suffix in the model number "SN74ALVC164245DLR" refers to the package type of the integrated circuit (IC). Specifically, "DLR" indicates a TSSOP (Thin Shrink Small Outline Package) with 20 pins.
Now, let's proceed with the detailed explanation of the pin function specifications, the circuit principle, and the pinout.
Pinout and Functions of the SN74ALVC164245DLR
The SN74ALVC164245DLR is a 16-bit bidirectional buffer/driver with control pins. Here is a detailed list of its pins and their functions for a 20-pin TSSOP package:
Pin Number Pin Name Pin Type Description 1 A1 Input Data input pin A1 for 16-bit bus. 2 A2 Input Data input pin A2 for 16-bit bus. 3 A3 Input Data input pin A3 for 16-bit bus. 4 A4 Input Data input pin A4 for 16-bit bus. 5 A5 Input Data input pin A5 for 16-bit bus. 6 A6 Input Data input pin A6 for 16-bit bus. 7 A7 Input Data input pin A7 for 16-bit bus. 8 A8 Input Data input pin A8 for 16-bit bus. 9 A9 Input Data input pin A9 for 16-bit bus. 10 A10 Input Data input pin A10 for 16-bit bus. 11 A11 Input Data input pin A11 for 16-bit bus. 12 A12 Input Data input pin A12 for 16-bit bus. 13 A13 Input Data input pin A13 for 16-bit bus. 14 A14 Input Data input pin A14 for 16-bit bus. 15 A15 Input Data input pin A15 for 16-bit bus. 16 DIR Control Direction control pin. Determines the direction of data flow: input or output. 17 OE Control Output enable pin. When low, the output is enabled. When high, the output is high-impedance. 18 B1 Output Data output pin B1 for 16-bit bus. 19 B2 Output Data output pin B2 for 16-bit bus. 20 VCC Power Supply Supply voltage pin. Connect to the positive supply rail.Circuit Principle:
The SN74ALVC164245DLR is a 16-bit transceiver, designed to perform bidirectional data transmission. The device includes 16 data input/output pins (A1-A16 and B1-B16) arranged in two 8-bit buses: A and B. These buses can either serve as input or output, depending on the state of the control pins DIR and OE.
DIR Pin: This pin controls the direction of data flow. When the DIR pin is low, the A bus functions as an input and the B bus functions as an output. When the DIR pin is high, the A bus functions as an output and the B bus as an input.
OE Pin: The OE (Output Enable) pin controls the output state. When the OE pin is low, the outputs are active and can drive the data to the B bus. When the OE pin is high, the output is in a high-impedance state, effectively isolating the B bus.
This device is ideal for applications that require fast data transfer between two buses while allowing control over the direction and enable state of the output. It’s commonly used in systems that require high-speed data manipulation and control in peripheral interface circuits.
Frequently Asked Questions (FAQs)
Q: What is the voltage range for the SN74ALVC164245DLR? A: The SN74ALVC164245DLR operates with a supply voltage range of 1.65V to 3.6V.
Q: Can I use the SN74ALVC164245DLR with a 5V supply? A: No, the SN74ALVC164245DLR is a low-voltage logic device and should only be used with voltages between 1.65V and 3.6V.
Q: What is the maximum current that the SN74ALVC164245DLR can sink or source? A: Each output pin can source or sink up to 8 mA of current.
Q: How many channels does the SN74ALVC164245DLR have? A: The device has 16 data channels, split across two 8-bit buses (A and B).
Q: What is the purpose of the OE pin on the SN74ALVC164245DLR? A: The OE pin controls the output state. When it is low, the output is active, and when it is high, the output is in high-impedance mode.
Q: What is the function of the DIR pin? A: The DIR pin determines the direction of data flow. When it is low, data flows from A to B, and when it is high, data flows from B to A.
Q: Can I use the SN74ALVC164245DLR for both input and output simultaneously? A: Yes, the device supports bidirectional data flow, so it can serve as both an input and an output depending on the direction control (DIR pin).
Q: What is the typical propagation delay of the SN74ALVC164245DLR? A: The typical propagation delay is approximately 2.5 ns for a 3.3V supply.
Q: What is the output impedance of the SN74ALVC164245DLR? A: The output impedance in the high-impedance state (when OE is high) is typically 100 Ω.
Q: Is the SN74ALVC164245DLR compatible with TTL logic? A: The SN74ALVC164245DLR is compatible with TTL levels for input, but it is designed to operate with lower voltage levels (1.65V to 3.6V).
Q: How should I connect the VCC pin of the SN74ALVC164245DLR? A: Connect the VCC pin to the positive supply rail, which should be between 1.65V and 3.6V.
Q: What happens when the OE pin is high? A: When the OE pin is high, the output pins go into a high-impedance state, effectively disconnecting them from the bus.
Q: Can the SN74ALVC164245DLR drive both sides of the bus simultaneously? A: No, the SN74ALVC164245DLR can drive only one bus (A or B) at a time, controlled by the DIR pin.
Q: What is the power consumption of the SN74ALVC164245DLR? A: The device has low power consumption, typically drawing around 1.5 µA in the quiescent state.
Q: Can the SN74ALVC164245DLR be used in I2C or SPI communication? A: While it can be used in serial data transfer applications, it is not specifically designed for I2C or SPI protocols.
Q: Is the SN74ALVC164245DLR robust against electrostatic discharge (ESD)? A: Yes, the device is designed with ESD protection to withstand standard electrostatic discharge levels.
Q: What is the typical output rise/fall time for the SN74ALVC164245DLR? A: The typical rise/fall time is around 2 ns for a 3.3V supply.
Q: Can I use the SN74ALVC164245DLR in automotive applications? A: The device is not specifically qualified for automotive applications, so care should be taken regarding environmental conditions.
Q: What is the operating temperature range for the SN74ALVC164245DLR? A: The device operates within a temperature range of -40°C to +85°C.
Q: What is the maximum frequency at which the SN74ALVC164245DLR can operate? A: The maximum frequency is typically around 100 MHz, depending on the operating conditions.
This overview includes a complete analysis of the SN74ALVC164245DLR's pinout, functions, and frequently asked questions, with detailed answers for comprehensive understanding.
