Overview
The SN74LVC16T245DGVR, manufactured by Texas Instruments, is a 16-bit dual-supply bus transceiver designed for configurable level-shifting and voltage translation. This device is optimized for asynchronous communication between two data buses, allowing for bidirectional data transmission with configurable direction control. It supports a wide range of supply voltages from 1.65 V to 5.5 V on both ports, making it versatile for mixed-voltage systems.
Key Specifications
| Parameter | Description |
|---|---|
| Number of Bits | 16 |
| Supply Voltage Range (VCCA and VCCB) | 1.65 V to 5.5 V |
| Input/Output Voltage Levels | Compatible with 1.8-V, 2.5-V, 3.3-V, and 5-V logic levels |
| Direction Control | Configurable via DIR input |
| Output Enable | Configurable via OE input |
| Output State | Tri-state outputs |
| ESD Protection | Exceeds JESD 22 standards |
| Latch-Up Performance | Exceeds 100 mA per JESD 78, Class II |
| Package Type |
Key Features
- Configurable Level-Shifting/Voltage Translation: Allows bidirectional translation between any of the 1.8-V, 2.5-V, 3.3-V, and 5-V voltage nodes.
- Dual-Rail Design: Each port can operate over the full 1.65-V to 5.5-V power-supply range.
- VCC Isolation Feature: If either VCC input is at GND, both ports are in the high-impedance state.
- Overvoltage-Tolerant Inputs and Outputs: Supports mixed voltage-mode data communications.
- Tri-State Outputs: Outputs can be placed in a high-impedance state.
- Ioff Supports Partial-Power-Down Mode Operation: Reduces power consumption when not in use.
Applications
The SN74LVC16T245 is ideal for level-shifting applications, particularly in systems where devices operate at different voltage levels. It is commonly used in:
- Mixed Voltage Systems: For interfacing devices with different supply voltages.
- Data Transmission Systems: Where direction of data transmission needs to be controlled dynamically.
- Embedded Systems: To manage communication between different modules or subsystems with varying voltage requirements.
Q & A
- What is the primary function of the SN74LVC16T245?
The primary function is to act as a 16-bit dual-supply bus transceiver with configurable level-shifting and voltage translation.
- What is the range of supply voltages supported by the SN74LVC16T245?
The device supports supply voltages from 1.65 V to 5.5 V on both VCCA and VCCB.
- How does the direction control work on the SN74LVC16T245?
The direction is controlled via the DIR input, which determines whether data is transmitted from the A bus to the B bus or vice versa.
- What is the purpose of the OE (Output Enable) input?
The OE input allows the outputs to be placed in a high-impedance state.
- Does the SN74LVC16T245 support overvoltage-tolerant inputs and outputs?
- What is the significance of the VCC isolation feature?
If either VCC input is at GND, both ports are in the high-impedance state, ensuring safe operation.
- How does the Ioff feature benefit the device?
The Ioff feature supports partial-power-down mode operation, reducing power consumption when the device is not in use.
- What are the common applications of the SN74LVC16T245?
- What kind of ESD protection does the SN74LVC16T245 offer?
- What is the latch-up performance of the SN74LVC16T245?
- What package types are available for the SN74LVC16T245?
