Overview
The SN74AVC16T245, produced by Texas Instruments, is a 16-bit dual-supply bus transceiver designed for low-voltage bidirectional translation between different voltage nodes. This device is optimized to operate with supply voltages ranging from 1.2V to 3.6V, making it versatile for various applications. It features two separate configurable power-supply rails, VCCA and VCCB, which allow for universal low-voltage translation between 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V voltage nodes. The device is particularly useful for asynchronous communication between data buses and includes output-enable inputs to isolate the buses when necessary.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCCA/VCCB Supply Voltage | 1.2 | - | 3.6 | V |
| Input Voltage (VI) | -0.5 | - | 4.6 | V |
| Output Voltage (VO) | -0.5 | - | VCCA + 0.5 / VCCB + 0.5 | V |
| Continuous Output Current (IO) | - | - | ±50 | mA |
| Continuous Current through VCCA, VCCB, and GND | - | - | ±100 | mA |
| Operating Free-Air Temperature (TA) | -40 | - | 85 | °C |
| Propagation Delay (tPLH/tPHL) at VCCA = 3.3V, VCCB = 3.3V | 2.8 | - | 5.6 | ns |
| Junction-to-Ambient Thermal Resistance (RθJA) | - | - | 69.9 | °C/W |
Key Features
- 16-bit noninverting bus transceiver with two separate configurable power-supply rails (VCCA and VCCB).
- Operates with supply voltages from 1.2V to 3.6V, enabling universal low-voltage bidirectional translation.
- Direction-control (DIR) input to control data transmission between A and B buses.
- Output-enable (OE) inputs to disable outputs and isolate the buses.
- Latch-Up performance exceeds 100mA per JESD 78, Class II.
- ESD protection exceeds JESD 22 – 8000V Human-Body Model, 200V Machine Model, and 1000V Charged-Device Model.
- Full specification for partial-power-down applications using Ioff circuitry.
- VCC isolation feature ensures high-impedance state during power-up or power-down.
Applications
- Personal Electronics: Suitable for low-voltage translation in mobile devices and consumer electronics.
- Industrial: Used in industrial control systems and automation where different voltage levels are required.
- Enterprise: Applied in server and networking equipment for reliable data communication.
- Telecom: Utilized in telecommunications equipment for signal translation between different voltage domains.
Q & A
- What is the voltage range for VCCA and VCCB in the SN74AVC16T245?
VCCA and VCCB can operate within a voltage range of 1.2V to 3.6V.
- What is the purpose of the DIR input in the SN74AVC16T245?
The DIR input controls the direction of data transmission between the A and B buses.
- How do you isolate the outputs in the SN74AVC16T245?
The outputs can be isolated by setting the OE (output-enable) input high.
- What is the maximum continuous output current for the SN74AVC16T245?
The maximum continuous output current is ±50 mA.
- What is the operating temperature range for the SN74AVC16T245?
The operating temperature range is from -40°C to 85°C.
- What type of ESD protection does the SN74AVC16T245 offer?
The device offers ESD protection exceeding JESD 22 – 8000V Human-Body Model, 200V Machine Model, and 1000V Charged-Device Model.
- How does the VCC isolation feature work in the SN74AVC16T245?
The VCC isolation feature ensures that if either VCC input is at GND, both ports are in the high-impedance state.
- What is the propagation delay for the SN74AVC16T245 at VCCA = 3.3V and VCCB = 3.3V?
The propagation delay (tPLH/tPHL) at VCCA = 3.3V and VCCB = 3.3V is typically around 2.8 ns to 5.6 ns.
- What are the common applications of the SN74AVC16T245?
The device is commonly used in personal electronics, industrial control systems, enterprise equipment, and telecommunications.
- What is the junction-to-ambient thermal resistance (RθJA) for the TSSOP package of the SN74AVC16T245?
The junction-to-ambient thermal resistance (RθJA) for the TSSOP package is approximately 69.9 °C/W.
