Overview
The SN74AVC4T245PWE4, produced by Texas Instruments, is a 4-bit dual-supply noninverting bidirectional voltage level translation device. This component is designed to facilitate asynchronous communication between two data buses operating at different voltage levels. The device supports voltage translation between any of the low-voltage nodes (1.2 V, 1.5 V, 1.8 V, 2.5 V, and 3.3 V), making it versatile for various applications. The SN74AVC4T245PWE4 features separate configurable power-supply rails for each port, allowing each port to operate over the full 1.2-V to 3.6-V power-supply range.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Number of Bits | Number of bits the device can translate | 4 |
| Voltage Range (VCCA) | Voltage range for A port | 1.2 V to 3.6 V |
| Voltage Range (VCCB) | Voltage range for B port | 1.2 V to 3.6 V |
| Package Types | Available package types | SOIC (16), TVSOP (16), TSSOP (16), VQFN (16), UQFN (16) |
| Package Size (SOIC) | Size of SOIC package | 9.90 mm x 3.91 mm |
| Package Size (TVSOP) | Size of TVSOP package | 3.60 mm x 4.40 mm |
| Package Size (TSSOP) | Size of TSSOP package | 5.00 mm x 4.40 mm |
| Package Size (VQFN) | Size of VQFN package | 4.00 mm x 3.50 mm |
| Package Size (UQFN) | Size of UQFN package | 2.60 mm x 1.80 mm |
| Operating Temperature | Range of operating temperatures | -40°C to 85°C |
| Data Rate | Maximum data rate for signal translation | Up to 380 Mbps (1.8 V to 3.3 V) |
Key Features
- Fully Configurable Dual-Rail Design: Allows each port to operate over the full 1.2-V to 3.6-V power-supply range, making it suitable for translating between any of the low-voltage nodes (1.2 V, 1.8 V, 2.5 V, and 3.3 V).
- High Speed Translation: Supports high data rate applications with a translated signal data rate of up to 380 Mbps when translating from 1.8 V to 3.3 V.
- Partial-Power-Down Mode Operation: Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.
- VCC Isolation Feature: Ensures that if either VCC input is at GND, both ports are in the high-impedance state.
- Control Inputs and Output Enable: Control inputs (DIR and OE) are referenced to VCCA, allowing for precise control over data transmission and output states.
Applications
- Telecommunications: Suitable for use in telecom systems where voltage level translation is necessary between different components.
- Embedded Systems: Useful in embedded systems that require communication between different voltage domains.
- Industrial Automation: Can be used in industrial automation systems where devices operate at different voltage levels.
- Consumer Electronics: Applicable in consumer electronics where voltage translation is required for interoperability between different components.
Q & A
- What is the primary function of the SN74AVC4T245PWE4?
The primary function of the SN74AVC4T245PWE4 is to perform bidirectional voltage level translation between two data buses operating at different voltage levels.
- What is the voltage range supported by each port of the SN74AVC4T245PWE4?
Both ports (A and B) can accept I/O voltages ranging from 1.2 V to 3.6 V.
- What are the available package types for the SN74AVC4T245PWE4?
The available package types include SOIC (16), TVSOP (16), TSSOP (16), VQFN (16), and UQFN (16).
- What is the maximum data rate supported by the SN74AVC4T245PWE4?
The device can support a maximum data rate of up to 380 Mbps when translating signals from 1.8 V to 3.3 V.
- How does the VCC isolation feature work in the SN74AVC4T245PWE4?
The VCC isolation feature ensures that if either VCC input is at GND, both ports are in the high-impedance state.
- What is the purpose of the Ioff circuitry in the SN74AVC4T245PWE4?
The Ioff circuitry disables the outputs to prevent damaging current backflow through the device when it is powered down.
- How do the control inputs (DIR and OE) function in the SN74AVC4T245PWE4?
The control inputs (DIR and OE) are referenced to VCCA and control the direction of data transmission and the output states of the device.
- What is the operating temperature range of the SN74AVC4T245PWE4?
The operating temperature range is from -40°C to 85°C.
- How should the OE pin be configured during power-up or power-down to ensure high-impedance state?
The OE pin should be tied to VCC through a pullup resistor to ensure the high-impedance state during power-up or power-down.
- In what types of systems is the SN74AVC4T245PWE4 commonly used?
The SN74AVC4T245PWE4 is commonly used in telecommunications, embedded systems, industrial automation, and consumer electronics where voltage level translation is necessary.
