Overview
The SN74AVC2T45DCUT, produced by Texas Instruments, is a 2-bit dual-supply bus transceiver designed for asynchronous communication between two data buses. This device supports universal low-voltage bidirectional translation and level-shifting between various voltage nodes, including 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V. The transceiver uses two separate configurable power-supply rails, VCCA and VCCB, which can operate independently within the range of 1.2V to 3.6V. The direction-control (DIR pin) input determines the direction of data transmission between the A and B ports, making it versatile for various system designs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Temperature Range | -40 to 85 | °C |
| Supply Voltage Range (VCCA and VCCB) | 1.2 to 3.6 | V |
| Data Rate (1.8V to 3.3V) | 500 | Mbps |
| Data Rate (<1.8V to 3.3V) | 320 | Mbps |
| Data Rate (Level-Shifting to 2.5V or 1.8V) | 320 | Mbps |
| Data Rate (Level-Shifting to 1.5V) | 280 | Mbps |
| Data Rate (Level-Shifting to 1.2V) | 240 | Mbps |
| ESD Protection | Exceeds JESD 22 | |
| Latch-Up Performance | Exceeds 100mA Per JESD 78, Class II | |
| Package Types | DCT (SSOP, 8), DCU (VSSOP, 8), YZP (DSBGA, 8), DDF (SOT-23, 8) |
Key Features
- Available in the Texas Instruments NanoFree™ Package
- VCC Isolation Feature: If either VCC input is at GND, both ports are in the high-impedance state
- Dual Supply Rail Design
- I/Os are 4.6V over voltage tolerant
- Ioff supports partial-power-down mode operation
- High data rates up to 500 Mbps depending on the voltage levels
- Universal low-voltage bidirectional translation and level-shifting
Applications
The SN74AVC2T45DCUT is suitable for a wide range of applications that require asynchronous communication between two data buses with different voltage levels. This includes:
- Mobile and consumer electronics where voltage translation is necessary
- Industrial control systems requiring data communication across different voltage domains
- Automotive systems where robust and reliable data transmission is critical
- Embedded systems and microcontrollers needing flexible voltage translation
Q & A
- What is the primary function of the SN74AVC2T45DCUT?
The primary function is to provide bidirectional translation and level-shifting between two data buses operating at different voltage levels.
- What is the range of supply voltages supported by the SN74AVC2T45DCUT?
The device supports supply voltages from 1.2V to 3.6V for both VCCA and VCCB.
- How does the direction-control (DIR) pin function?
The DIR pin determines the direction of data transmission between the A and B ports.
- What are the maximum data rates supported by the SN74AVC2T45DCUT?
The maximum data rates vary from 240 Mbps to 500 Mbps depending on the voltage levels.
- Does the SN74AVC2T45DCUT support partial-power-down mode operation?
- What types of packages are available for the SN74AVC2T45DCUT?
The device is available in DCT (SSOP, 8), DCU (VSSOP, 8), YZP (DSBGA, 8), and DDF (SOT-23, 8) packages.
- What is the operating temperature range of the SN74AVC2T45DCUT?
The operating temperature range is from -40°C to 85°C.
- Does the SN74AVC2T45DCUT have ESD protection?
- What is the latch-up performance of the SN74AVC2T45DCUT?
- Why is it important to keep the input circuitry active on both A and B ports?
