Overview
The SN74LVC8T245PWR, produced by Texas Instruments, is an eight-bit non-inverting bus transceiver designed with configurable dual power supply rails. This device enables bidirectional voltage level translation, making it versatile for various voltage nodes. It operates with supply voltages ranging from 1.65 V to 5.5 V on both ports (VCCA and VCCB), allowing universal low-voltage bidirectional translation between 1.8-V, 2.5-V, 3.3-V, and 5.5-V voltage nodes. The device is optimized for asynchronous communication between two data buses and features control inputs and output enable inputs to manage data transmission and high-impedance states.
Key Specifications
| Parameter | Value |
|---|---|
| Package | 24-Pin TSSOP (PW) |
| Operating Temperature Range | -40°C to 85°C |
| Supply Voltage Range (VCCA and VCCB) | 1.65 V to 5.5 V |
| 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 |
| Junction-to-Ambient Thermal Resistance (RθJA) | 90.7 °C/W (for 24-pin TSSOP) |
Key Features
- Control inputs VIH/VIL levels are referenced to VCCA voltage.
- VCC isolation feature – if either VCC input is at GND, all outputs are in the high-impedance state.
- Fully configurable dual-rail design allows each port to operate over the full 1.65-V to 5.5-V power-supply range.
- ESD protection exceeds JESD 22 – 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.
- Three-state outputs for data transmission control.
- Ioff circuitry for partial-power-down applications, preventing damaging current backflow.
Applications
- Personal electronic devices.
- Industrial applications.
- Enterprise systems.
- Telecommunication equipment).
Q & A
- What is the primary function of the SN74LVC8T245PWR?
The SN74LVC8T245PWR is an eight-bit non-inverting bus transceiver that enables bidirectional voltage level translation between different voltage nodes.
- What is the operating temperature range of the SN74LVC8T245PWR?
The operating temperature range is -40°C to 85°C.
- What are the supply voltage ranges for VCCA and VCCB?
Both VCCA and VCCB can operate over the range of 1.65 V to 5.5 V.
- How does the VCC isolation feature work?
If either VCC input is at GND, all outputs are in the high-impedance state.
- What kind of ESD protection does the SN74LVC8T245PWR have?
The device has ESD protection exceeding JESD 22 – 4000-V Human-Body Model, 100-V Machine Model, 1000-V Charged-Device Model.
- How does the Ioff circuitry function?
The Ioff circuitry disables the outputs to prevent damaging current backflow during partial-power-down applications.
- What are the typical applications of the SN74LVC8T245PWR?
It is used in personal electronic devices, industrial applications, enterprise systems, and telecommunication equipment.
- How do the control inputs (DIR and OE) manage data transmission?
The direction-control (DIR) and output-enable (OE) inputs control whether data is transmitted from the A bus to the B bus or vice versa, and can also place both output ports into the high-impedance mode.
- What is the significance of the three-state outputs?
The three-state outputs allow for data transmission control, enabling or disabling the output ports as needed.
- How does the device handle latch-up performance?
The device's latch-up performance exceeds 100 mA per JESD 78, class II.
