Overview
The SN74AVC2T45DCUR is a 2-bit dual-supply bus transceiver designed by Texas Instruments. This component is optimized for asynchronous communication between two data buses, enabling universal low-voltage bidirectional translation and level-shifting between various voltage nodes (1.2V, 1.5V, 1.8V, 2.5V, and 3.3V). The device features two separate configurable power-supply rails, VCCA and VCCB, which can accept supply voltages from 1.2V to 3.6V. This flexibility makes it ideal for applications requiring voltage translation and level-shifting in mixed-voltage systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package Type | VSSOP (DCU) | - |
| Pins | 8 | - |
| Operating Temperature Range | -40 to 85 | °C |
| Supply Voltage (VCCA and VCCB) | 1.2 to 3.6 | V |
| Maximum Data Rates | 500 Mbps (1.8V to 3.3V), 320 Mbps (<1.8V to 3.3V), 320 Mbps (Level-Shifting to 2.5V or 1.8V), 280 Mbps (Level-Shifting to 1.5V), 240 Mbps (Level-Shifting to 1.2V) | Mbps |
| Latch-Up Performance | Exceeds 100 mA Per JESD 78, Class II | - |
| ESD Protection | Exceeds JESD 22 | - |
| Thermal Resistance (RθJA) | 199.3 | °C/W |
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: Supports supply voltages from 1.2V to 3.6V for both VCCA and VCCB.
- I/Os Are 4.6V Over Voltage Tolerant.
- Ioff Supports Partial-Power-Down Mode Operation).
- Active Bus-Hold Circuitry: Holds unused or un-driven inputs at a valid logic state).
- High-Speed Data Rates: Up to 500 Mbps for certain voltage configurations).
Applications
- Smartphones).
- Servers).
- Desktop PCs and Notebooks).
- Other Portable Devices).
The SN74AVC2T45DCUR is versatile and can be used in any system that requires bidirectional voltage translation and level-shifting between different voltage domains.
Q & A
- What is the primary function of the SN74AVC2T45DCUR?
The primary function is to enable asynchronous communication between two data buses with bidirectional voltage translation and level-shifting between various voltage nodes.
- What are the supported supply voltage ranges for VCCA and VCCB?
Both VCCA and VCCB can accept supply voltages from 1.2V to 3.6V.
- What are the maximum data rates supported by the SN74AVC2T45DCUR?
The device supports up to 500 Mbps for certain voltage configurations, with varying rates for different level-shifting scenarios.
- Does the SN74AVC2T45DCUR have any special power-down features?
Yes, it supports partial-power-down mode operation through the Ioff feature.
- What kind of ESD protection does the SN74AVC2T45DCUR offer?
The device exceeds JESD 22 ESD protection standards.
- What is the purpose of the DIR pin in the SN74AVC2T45DCUR?
The DIR pin controls the direction of data transmission between the A and B ports.
- What is the significance of the bus-hold circuitry in the SN74AVC2T45DCUR?
The bus-hold circuitry holds unused or un-driven inputs at a valid logic state to prevent floating inputs.
- What are the available package types for the SN74AVC2T45DCUR?
The device is available in VSSOP (DCU), SSOP (DCT), DSBGA (YZP), and SOT-23 (DDF) packages.
- What is the operating temperature range of the SN74AVC2T45DCUR?
The operating temperature range is from -40°C to 85°C.
- Does the SN74AVC2T45DCUR support latch-up protection?
Yes, it exceeds 100 mA per JESD 78, Class II latch-up performance standards.
