The maximum operating frequency of the SN74LS155ADR is 35 MHz, but it can vary depending on the load capacitance and the output current.
To ensure reliable operation in high-temperature environments, it is recommended to follow proper thermal management practices, such as providing adequate heat sinking and airflow, and ensuring that the device is operated within its recommended operating temperature range of -40°C to 85°C.
The SN74LS155ADR is a 5V device, but it can be used in a 3.3V system with some limitations. The device's input voltage threshold is typically around 2.5V, so it may not function correctly with 3.3V inputs. Additionally, the output voltage levels may not be compatible with 3.3V systems. It is recommended to use a level translator or a voltage regulator to ensure compatibility.
The SN74LS155ADR does not have any specific power-up or power-down sequencing requirements. However, it is recommended to follow general power-up and power-down sequencing guidelines to ensure that the device is powered up and down in a controlled manner to prevent damage or malfunction.
The recommended layout and routing for the SN74LS155ADR involves following general PCB design guidelines, such as keeping the signal traces short and direct, using a solid ground plane, and avoiding noise-sensitive signals near the device's inputs and outputs. Additionally, it is recommended to follow Texas Instruments' recommended layout and routing guidelines for the specific package type used.
SN74LS155ADR datasheet
by Texas Instruments
