Overview
The SN74LVC8T245MPWREP, produced by Texas Instruments, is an 8-bit dual-supply bus transceiver designed for voltage level translation and asynchronous communication between two data buses. This device is part of the SN74LVC8T245 family and is optimized for operation with supply voltages ranging from 1.65 V to 5.5 V on both VCCA and VCCB. It supports universal low-voltage bidirectional translation between various voltage nodes such as 1.8 V, 2.5 V, 3.3 V, and 5.5 V. The device features fully configurable dual-rail design, allowing each port to operate over the full 1.65-V to 5.5-V power-supply range, making it suitable for a wide range of applications requiring voltage level translation.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range (VCCA, VCCB) | 1.65 to 5.5 | V |
| Input Voltage Range (A and B ports) | -0.5 to 6.5 | V |
| Control Input Voltage Range | -0.5 to 6.5 | V |
| Output Voltage Range (High or Low State) | -0.5 to 6.5 | V |
| Operating Temperature Range | -55 to 125 | °C |
| Package Types | TSSOP (24), SOIC (24), VQFN (24) | |
| ESD Protection | 4000-V Human-Body Model, 200-V Machine Model, 1000-V Charged-Device Model |
Key Features
- Fully configurable dual-rail design allowing each port to operate over the full 1.65-V to 5.5-V power-supply range.
- Universal low-voltage bidirectional translation between 1.8-V, 2.5-V, 3.3-V, and 5.5-V voltage nodes.
- VCCA and VCCB can be supplied at any voltage between 1.65 V and 5.5 V.
- Direction-control (DIR) and output-enable (OE) inputs to control data transmission and output states.
- High-impedance state for both output ports when OE is high.
- ESD protection exceeds JESD 22 standards.
- Latch-up performance exceeds 100 mA per JESD 78, Class II.
Applications
The SN74LVC8T245MPWREP is ideal for level-translation applications, enabling the interfacing of devices or systems operating at different interface voltages. It is commonly used in:
- Asynchronous communication between two data buses.
- Voltage level translation in mixed-voltage systems.
- Industrial and automotive applications requiring robust voltage translation.
- Embedded systems and microcontrollers interfacing with different voltage level peripherals.
Q & A
- What is the primary function of the SN74LVC8T245MPWREP?
The primary function is to perform voltage level translation and asynchronous communication between two data buses.
- What is the range of supply voltages supported by the SN74LVC8T245MPWREP?
The device supports supply voltages ranging from 1.65 V to 5.5 V on both VCCA and VCCB.
- How does the direction-control (DIR) input affect data transmission?
The DIR input controls the direction of data transmission; a high DIR allows data transmission from A to B, and a low DIR allows data transmission from B to A.
- What happens when the output-enable (OE) input is high?
When OE is high, both output ports will be in the high-impedance state.
- What types of ESD protection does the SN74LVC8T245MPWREP offer?
The device offers ESD protection exceeding JESD 22 standards, including 4000-V Human-Body Model, 200-V Machine Model, and 1000-V Charged-Device Model.
- What are the typical applications of the SN74LVC8T245MPWREP?
It is used in level-translation applications, asynchronous communication between data buses, and in mixed-voltage systems.
- What are the available package types for the SN74LVC8T245MPWREP?
The device is available in TSSOP (24), SOIC (24), and VQFN (24) packages.
- What is the operating temperature range of the SN74LVC8T245MPWREP?
The operating temperature range is from -55°C to 125°C.
- Does the SN74LVC8T245MPWREP have any special features for latch-up performance?
Yes, it exceeds 100 mA per JESD 78, Class II for latch-up performance.
- How do I ensure proper operation of the input circuitry on both A and B ports?
The input circuitry on both A and B ports must have a logic HIGH or LOW level applied to prevent excess ICC and ICCZ.
