Overview
The SN74AVC8T245DGVR is an 8-bit dual-supply bus transceiver designed by Texas Instruments. This device is optimized for voltage level translation and bidirectional communication between data buses operating at different voltage levels. It supports supply voltages ranging from 1.2 V to 3.6 V, making it versatile for various applications, including 1.8-V, 2.5-V, and 3.3-V systems. The device features 3-state outputs and is packaged in a 24-pin TVSOP form factor, which is compact and suitable for surface-mount technology.
Key Specifications
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Technology family | AVC | Applications | RGMII |
| Bits (#) | 8 | High input voltage (min) (V) | 0.78 |
| High input voltage (max) (V) | 3.6 | Vout (min) (V) | 1.2 |
| Vout (max) (V) | 3.6 | Data rate (max) (MBps) | 320 |
| IOH (max) (mA) | -12 | IOL (max) (mA) | 12 |
| Supply current (max) (µA) | 25 | Input type | Standard CMOS |
| Output type | 3-State, Balanced CMOS, Push-Pull | Operating temperature range (°C) | -40 to 125 |
| Package | TVSOP (DGV)-24 | ESD protection | 8000-V Human-Body Model, 200-V Machine Model, 1000-V Charged-Device Model |
Key Features
- Bidirectional level shifting between any of the 1.2-V, 1.5-V, 1.8-V, 2.5-V, and 3.3-V voltage nodes.
- 8-bit non-inverting bus transceiver with configurable dual-supply power rails.
- 3-state outputs capable of driving up to 50 mA of current on each bus.
- Mixed-mode signal operation on the same bus.
- Low static and dynamic power consumption.
- ESD protection exceeds JESD 22 standards: 8000-V Human-Body Model, 200-V Machine Model, 1000-V Charged-Device Model.
- VCC isolation feature – all I/O ports are in the high-impedance state when either VCC input is at GND.
- Ioff supports partial power-down mode operation.
- I/Os are 4.6-V tolerant.
- Maximum data rates: 170 Mbps (VCCA < 1.8 V or VCCB < 1.8 V), 320 Mbps (VCCA ≥ 1.8 V and VCCB ≥ 1.8 V).
Applications
- Efficient bidirectional level shifting between different voltage domains.
- Portable devices and battery-powered systems where power efficiency is critical.
- Data communication systems, including RGMII applications.
- Industrial control systems requiring voltage level translation.
- Automotive electronics where mixed-voltage systems are common.
Q & A
- Q: What is the SN74AVC8T245DGVR used for?
A: The SN74AVC8T245DGVR is used for bidirectional voltage level translation between different voltage domains, making it suitable for applications in mixed-voltage systems.
- Q: What is the operating temperature range of the SN74AVC8T245DGVR?
A: The operating temperature range is -40°C to 125°C.
- Q: What are the maximum data rates supported by the SN74AVC8T245DGVR?
A: The device supports maximum data rates of 170 Mbps when either VCCA or VCCB is less than 1.8 V, and 320 Mbps when both VCCA and VCCB are 1.8 V or greater.
- Q: What type of ESD protection does the SN74AVC8T245DGVR have?
A: The device has ESD protection exceeding JESD 22 standards: 8000-V Human-Body Model, 200-V Machine Model, and 1000-V Charged-Device Model.
- Q: How does the VCC isolation feature work?
A: The VCC isolation feature puts all I/O ports in the high-impedance state when either VCC input is at GND.
- Q: What is the Ioff feature and its purpose?
A: The Ioff feature supports partial power-down mode operation by disabling the outputs to prevent damaging current backflow through the device when it is powered down.
- Q: What is the package type and pin count of the SN74AVC8T245DGVR?
A: The device is packaged in a 24-pin TVSOP (DGV) form factor.
- Q: Can the SN74AVC8T245DGVR be used in both 3.3-V and 2.5-V applications?
A: Yes, it is designed to be used in both 3.3-V and 2.5-V applications and can translate between any of the 1.8-V, 2.5-V, and 3.3-V voltage nodes.
- Q: How does the device handle mixed-mode signal operation?
A: The SN74AVC8T245DGVR supports mixed-mode signal operation on the same bus, allowing for flexible use in various voltage domains.
- Q: What is the warranty period for the SN74AVC8T245DGVR when purchased from authorized distributors?
A: The warranty period is typically 1 year, covering defects in materials and workmanship under normal use conditions.
