Overview
The SN74LVC16T245 is a 16-bit dual-supply bus transceiver designed by Texas Instruments. This device is optimized for asynchronous communication between two data buses and features configurable level-shifting and voltage translation. It allows for universal low-voltage bidirectional translation between various voltage nodes such as 1.8 V, 2.5 V, 3.3 V, and 5 V. The device uses two separate configurable power-supply rails, with the A port tracking VCCA and the B port tracking VCCB, both of which can operate over a wide voltage range from 1.65 V to 5.5 V.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | TSSOP (DGG) | - |
| No. of Pins | 48 | - |
| Supply Voltage Min | 1.65 | V |
| Supply Voltage Max | 5.5 | V |
| Operating Temperature Min | -40 | °C |
| Operating Temperature Max | 85 | °C |
| Input Voltage Range | -0.5 to 4.6 | V |
| Output Current Continuous | ±50 | mA |
| ESD Protection | Exceeds JESD 22 | - |
| Latch-Up Performance | Exceeds 100 mA per JESD 78, Class II | - |
Key Features
- Control Inputs: The control inputs (DIR and OE) are referenced to VCCA, allowing for precise control over data transmission.
- VCC Isolation Feature: If either VCC input is at GND, both ports enter a high-impedance state.
- Overvoltage-Tolerant Inputs and Outputs: Allows mixed voltage-mode data communications.
- Fully Configurable Dual-Rail Design: Each port can operate over the full 1.65-V to 5.5-V power-supply range.
- Partial-Power-Down Mode Operation: Supports Ioff, disabling outputs to prevent current backflow when powered down.
- ESD Protection and Latch-Up Performance: Exceeds JESD 22 and 100 mA per JESD 78, Class II, respectively.
Applications
The SN74LVC16T245 is suitable for various applications requiring asynchronous communication between data buses with different voltage levels. This includes:
- Embedded systems where voltage translation is necessary.
- Industrial control systems requiring robust and reliable data transmission.
- Automotive systems where mixed voltage levels are common.
- Consumer electronics that need to interface with different voltage domains.
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 voltage range for the supply voltages VCCA and VCCB?
The voltage range for both VCCA and VCCB is from 1.65 V to 5.5 V.
- How does the VCC isolation feature work?
If either VCC input is at GND, both ports enter a high-impedance state.
- What is the purpose of the Ioff feature?
The Ioff feature supports partial-power-down mode operation by disabling the outputs to prevent damaging current backflow when the device is powered down.
- What kind of ESD protection does the SN74LVC16T245 have?
The device exceeds JESD 22 ESD protection standards.
- What is the operating temperature range for the SN74LVC16T245?
The operating temperature range is from -40°C to 85°C.
- How many pins does the SN74LVC16T245 have?
The device has 48 pins in a TSSOP (DGG) package.
- What is the maximum continuous output current for the SN74LVC16T245?
The maximum continuous output current is ±50 mA.
- Is the SN74LVC16T245 RoHS compliant?
- What are some common applications for the SN74LVC16T245?
