ZHCSL21B March 2020 – April 2022 UCC27284
PRODUCTION DATA
The device in DRC package has an enable (EN) pin. The outputs will be active only if the EN pin voltage is above the threshold voltage. Outputs will be held low if EN pin is left floating or pulled-down to ground. An internal 250 kΩ resistor connects EN pin to VSS pin. Thus, leaving the EN pin floating disables the device. Externally pulling EN pin to ground shall also disable the device. If the EN pin is not used, then it is recommended to connect it to VDD pin. If a pullup resistor needs to be used then a strong pullup resistor is recommended. For 12V supply voltage, a 10k? pull-up is suggested. In noise prone application, a small filter capacitor, 1nF, should be connected from the EN pin to VSS pin as close to the device as possible. An analog or a digital controller output pin could be connected to EN pin to enable or disable the device. Built-in hysteresis helps prevent any nuisance tripping or chattering of the outputs.