Overview
The SN74AVC8T245PWG4, produced by Texas Instruments, is an 8-bit noninverting bus transceiver designed for asynchronous communication between data buses. This device utilizes two separate configurable power-supply rails, allowing it to operate with supply voltages ranging from 1.2 V to 3.6 V on both the A and B ports. This flexibility enables universal low-voltage bidirectional translation between various voltage nodes such as 1.2 V, 1.5 V, 1.8 V, 2.5 V, and 3.3 V. The device is optimized for high-speed data transmission and supports partial power-down mode operation, making it suitable for a wide range of applications including personal electronics, industrial, enterprise, and telecom sectors.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package Type | TSSOP (PW) | - |
| Pins | 24 | - |
| Operating Temperature Range | -40 to 125 | °C |
| Supply Voltage Range (VCCA/VCCB) | 1.2 to 3.6 | V |
| 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) | Mbps |
| ESD Protection | 8000-V Human-Body Model 200-V Machine Model 1000-V Charged-Device Model | V |
| Latch-Up Performance | Exceeds 100 mA per JESD 78, Class II | mA |
| I/O Voltage Tolerance | 4.6 V | V |
Key Features
- Fully configurable dual-rail design allowing each port to operate over the full 1.4-V to 3.6-V power-supply range.
- I/Os are 4.6-V tolerant, providing robust protection against voltage spikes.
- VCC isolation feature – if either VCC input is at GND, all I/O ports are in the high-impedance state.
- Ioff supports partial power-down mode operation, preventing backflow current when the device is powered down.
- Control inputs V IH/V IL levels are referenced to VCCA voltage.
- High-speed data transmission capabilities with maximum data rates of up to 320 Mbps.
- ESD protection exceeds JESD 22 standards, including 8000-V Human-Body Model, 200-V Machine Model, and 1000-V Charged-Device Model.
- Latch-up performance exceeds 100 mA per JESD 78, Class II.
Applications
The SN74AVC8T245PWG4 is versatile and can be used in various applications, including:
- Personal electronics: For voltage translation and communication between different voltage domains within personal electronic devices.
- Industrial: In industrial control systems and automation where different voltage levels are used.
- Enterprise: In server and networking equipment where multiple voltage levels are present.
- Telecom: For communication and signal translation in telecommunications equipment.
Q & A
- What is the primary function of the SN74AVC8T245PWG4?
The primary function is to act as an 8-bit noninverting bus transceiver for asynchronous communication between data buses with different voltage levels.
- What is the range of supply voltages that the SN74AVC8T245PWG4 can operate with?
The device can operate with supply voltages ranging from 1.2 V to 3.6 V on both the A and B ports.
- What are the maximum data rates supported by the SN74AVC8T245PWG4?
The device supports maximum data rates of up to 170 Mbps when VCCA or VCCB is less than 1.8 V, and up to 320 Mbps when both VCCA and VCCB are 1.8 V or higher.
- What is the purpose of the VCC isolation feature?
The VCC isolation feature ensures that all I/O ports are in the high-impedance state if either VCC input is at GND.
- How does the Ioff feature work?
The Ioff feature supports partial power-down mode operation by disabling the I/O output circuits to prevent backflow current when the device is powered down.
- What kind of ESD protection does the SN74AVC8T245PWG4 offer?
The device offers ESD protection exceeding JESD 22 standards, including 8000-V Human-Body Model, 200-V Machine Model, and 1000-V Charged-Device Model.
- What is the latch-up performance of the SN74AVC8T245PWG4?
The latch-up performance exceeds 100 mA per JESD 78, Class II.
- How do the control inputs work?
The control inputs (DIR and OE) are referenced to VCCA voltage, and the OE input can be used to disable the outputs, placing the buses in a high-impedance state.
- What is the significance of the 4.6-V tolerant I/Os?
The 4.6-V tolerant I/Os provide protection against voltage spikes and ensure robust operation.
- In which sectors can the SN74AVC8T245PWG4 be applied?
The device can be applied in personal electronics, industrial, enterprise, and telecom sectors.
