The maximum operating frequency of the SN74LS21DRG4 is typically around 25 MHz, but it can vary depending on the specific application and operating conditions.
To ensure reliable operation in high-temperature environments, it's essential to follow proper thermal management practices, such as providing adequate heat sinking and airflow, and ensuring that the device is operated within its recommended temperature range (-40°C to 85°C).
The recommended power-on sequence for the SN74LS21DRG4 is to apply power to the VCC pin first, followed by the input signals. This helps to prevent unwanted latch-up or oscillation during power-up.
To minimize EMI and EMC issues, it's essential to follow proper PCB design practices, such as using ground planes, shielding, and decoupling capacitors. Additionally, ensure that the device is operated within its recommended operating conditions and that the system is designed to meet relevant EMI and EMC standards.
The recommended storage temperature range for the SN74LS21DRG4 is -65°C to 150°C. Storage outside of this range can affect the device's reliability and performance.
SN74LS21DRG4 datasheet
by Texas Instruments
