Overview
The SN74AXC8T245-Q1, produced by Texas Instruments, is an 8-bit non-inverting bus transceiver designed to resolve voltage level mismatches between devices operating at different voltage nodes. This device is AEC-Q100 qualified, making it suitable for automotive applications. It features a fully configurable dual-rail design, allowing each port to operate with a power supply range from 0.65V to 3.6V. The device supports asynchronous communication between data buses and includes multiple direction-control pins for simultaneous up and down translation. It also offers VCC isolation and partial power-down modes to manage power efficiently.
Key Specifications
| Parameter | Min | Max | Unit |
|---|---|---|---|
| Supply voltage, VCCA | –0.5 | 4.2 | V |
| Supply voltage, VCCB | –0.5 | 4.2 | V |
| Input voltage, VI (A port) | –0.5 | 4.2 | V |
| Input voltage, VI (B port) | –0.5 | 4.2 | V |
| Operating free-air temperature, TA | –40 | 125 | °C |
| Propagation delay (from input A to output B) | 26 | 142 | ns |
| Input capacitance (control inputs) | 4.5 | 4.5 | pF |
| Data I/O capacitance (ports A and B) | 5.7 | 5.7 | pF |
| Junction-to-ambient thermal resistance (RθJA) | 35.0 (RHL VQFN) | 92.0 (PW TSSOP) | °C/W |
Key Features
- AEC-Q100 qualified for automotive applications
- Available in wettable flank QFN (WRGY) package
- Fully configurable dual-rail design allows each port to operate with a power supply range from 0.65V to 3.6V
- Operating temperature from –40°C to +125°C
- Multiple direction-control pins for simultaneous up and down translation
- Up to 380Mbps support when translating from 1.8V to 3.3V
- VCC isolation feature to effectively isolate both buses in a power-down scenario
- Partial power-down mode to limit backflow current in a power-down scenario
- Compatible with SN74AVC8T245-Q1 level shifter
- Latch-up performance exceeds 100mA per JESD 78, class II
Applications
- Infotainment head unit
- ADAS fusion
- ADAS front camera
- HEV battery management system
Q & A
- What is the operating temperature range of the SN74AXC8T245-Q1?
The operating temperature range is from –40°C to +125°C.
- What are the supported power supply voltage ranges for VCCA and VCCB?
Both VCCA and VCCB can operate with a power supply range from 0.65V to 3.6V.
- What is the maximum propagation delay from input A to output B?
The maximum propagation delay from input A to output B can be up to 142 ns depending on the voltage levels.
- Does the SN74AXC8T245-Q1 support partial power-down mode?
- What is the purpose of the VCC isolation feature?
The VCC isolation feature effectively isolates both buses in a power-down scenario by disabling the level shifter outputs if either VCC input supply is below 100mV.
- What are the typical applications of the SN74AXC8T245-Q1?
Typical applications include infotainment head units, ADAS fusion, ADAS front cameras, and HEV battery management systems.
- What is the maximum data transfer rate supported by the SN74AXC8T245-Q1?
The device supports up to 380Mbps when translating from 1.8V to 3.3V.
- Is the SN74AXC8T245-Q1 compatible with other Texas Instruments devices?
- What is the latch-up performance of the SN74AXC8T245-Q1?
The latch-up performance exceeds 100mA per JESD 78, class II.
- What are the available package options for the SN74AXC8T245-Q1?
The device is available in PW (TSSOP), RHL (VQFN), and WRGY (VQFN) packages.
