Overview
The SN74AVC4T245D is a 4-bit noninverting bus transceiver produced by Texas Instruments. This device is designed for asynchronous communication between two data buses and features a fully configurable dual-rail design. It allows each port to operate over a wide power-supply range from 1.2V to 3.6V, enabling universal low-voltage bidirectional translation between various voltage nodes such as 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V. The device is optimized for use in partial-power-down applications and includes features like VCC isolation and high-impedance state control during power-up and power-down.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOIC (16), TVSOP (16), TSSOP (16), VQFN (16), UQFN (16) | - |
| Pins | 16 | - |
| Operating Temperature Range | -40 to 85 | °C |
| Power Supply Range (VCCA/VCCB) | 1.2V to 3.6V | V |
| Maximum Data Rates | 380 Mbps (1.8V to 3.3V), 200 Mbps (< 1.8V to 3.3V), 150 Mbps (translate to 1.5V), 100 Mbps (translate to 1.2V) | Mbps |
| ESD Protection | 8000V Human-Body Model, 150V Machine Model, 1000V Charged-Device Model | V |
| Latch-up Performance | Exceeds 100mA per JESD 78, Class II | mA |
Key Features
- Control inputs VIH/VIL levels are referenced to VCCA voltage
- Fully configurable dual-rail design allows each port to operate over the full 1.2V to 3.6V power-supply range
- I/Os are 4.6V tolerant
- Ioff supports partial power-down-mode operation
- VCC isolation feature ensures both ports are in the high-impedance state if either VCC input is at GND
- High-impedance state control during power-up and power-down
- ESD protection exceeds JESD 22 standards
Applications
The SN74AVC4T245D is suitable for various applications requiring low-voltage bidirectional translation, including:
- Asynchronous communication between two data buses
- Partial-power-down applications
- Telecom and other communication systems
- Embedded systems and microcontrollers
Q & A
- What is the primary function of the SN74AVC4T245D?
The primary function is to act as a 4-bit noninverting bus transceiver for asynchronous communication between two data buses, enabling bidirectional voltage translation between different voltage levels.
- What is the power supply range for the SN74AVC4T245D?
The device operates with a power supply range of 1.2V to 3.6V for both VCCA and VCCB.
- What are the maximum data rates supported by the SN74AVC4T245D?
The device supports maximum data rates of 380 Mbps (1.8V to 3.3V), 200 Mbps (< 1.8V to 3.3V), 150 Mbps (translate to 1.5V), and 100 Mbps (translate to 1.2V).
- Does the SN74AVC4T245D support partial power-down mode?
- What is the ESD protection level of the SN74AVC4T245D?
The device has ESD protection exceeding 8000V Human-Body Model, 150V Machine Model, and 1000V Charged-Device Model.
- How do you ensure the high-impedance state during power-up or power-down?
To ensure the high-impedance state, tie OE to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
- What is the operating temperature range of the SN74AVC4T245D?
The operating temperature range is -40°C to 85°C.
- What packages are available for the SN74AVC4T245D?
The device is available in SOIC (16), TVSOP (16), TSSOP (16), VQFN (16), and UQFN (16) packages.
- Is the SN74AVC4T245D RoHS compliant?
- What is the latch-up performance of the SN74AVC4T245D?
The latch-up performance exceeds 100mA per JESD 78, Class II.
