Overview
The SN74LVC8T245PWR is an eight-bit non-inverting bus transceiver produced by Texas Instruments. This device is designed to enable bidirectional voltage level translation between two data buses, making it highly versatile for various voltage level environments. It operates with configurable dual power supply rails, allowing each port to function over a wide range of voltages from 1.65 V to 5.5 V. This feature facilitates universal low-voltage bidirectional translation between different voltage nodes such as 1.8 V, 2.5 V, 3.3 V, and 5.5 V.
Key Specifications
| Parameter | Value |
|---|---|
| Package | TSSOP (PW) - 24 pins |
| Operating Temperature Range | -40°C to 85°C |
| Power Supply Range | 1.65 V to 5.5 V (VCCA and VCCB) |
| ESD Protection | 4000-V Human-Body Model, 100-V Machine Model, 1000-V Charged-Device Model |
| Latch-up Performance | Exceeds 100 mA per JESD 78, class II |
| Control Inputs | VIH/VIL levels referenced to VCCA voltage |
Key Features
- Configurable dual power supply rails allowing each port to operate over the full 1.65-V to 5.5-V power-supply range.
- VCC isolation feature – if either VCC input is at GND, all outputs are in the high-impedance state.
- Control inputs VIH/VIL levels are referenced to VCCA voltage.
- ESD protection exceeds JESD 22 standards.
- Latch-up performance exceeds 100 mA per JESD 78, class II.
- Designed for asynchronous communication between two data buses with direction-control (DIR) and output-enable (OE) inputs.
Applications
The SN74LVC8T245PWR is ideal for applications requiring voltage level translation between different voltage domains. This includes but is not limited to:
- Embedded systems where different components operate at different voltage levels.
- Communication interfaces that need to translate signals between different voltage standards.
- Power management systems where voltage level translation is necessary.
- Industrial control systems that require robust and reliable voltage level translation.
Q & A
- What is the primary function of the SN74LVC8T245PWR? The primary function is to enable bidirectional voltage level translation between two data buses.
- What is the operating temperature range of the SN74LVC8T245PWR? The operating temperature range is -40°C to 85°C.
- What are the power supply voltage ranges for VCCA and VCCB? Both VCCA and VCCB can operate over the range of 1.65 V to 5.5 V.
- What kind of ESD protection does the SN74LVC8T245PWR offer? It offers 4000-V Human-Body Model, 100-V Machine Model, and 1000-V Charged-Device Model ESD protection.
- How does the VCC isolation feature work? If either VCC input is at GND, all outputs are in the high-impedance state.
- What are the control inputs referenced to? The control inputs VIH/VIL levels are referenced to VCCA voltage.
- Is the device suitable for partial-power-down applications? Yes, the device is fully specified for partial-power-down applications using Ioff circuitry.
- How do the direction-control (DIR) and output-enable (OE) inputs function? The DIR input determines the direction of data transmission, and the OE input can disable the device to isolate the buses.
- What is the significance of the latch-up performance of the SN74LVC8T245PWR? The latch-up performance exceeds 100 mA per JESD 78, class II, ensuring robust operation.
- What kind of packaging is available for the SN74LVC8T245PWR? It is available in a TSSOP (PW) package with 24 pins.
