HD74LS490P

The HD74LS490P is designed as one kind of BCD-to-seven segment decoder / driver with open collector outputs. It features active-high outputs for driving lamp buffer. This circuit incorporates a direct blanking input. Segment identification and resultant displays are shown below. Display patterns for BCD input counts above 9 are unique symbols to authenticate input conditions. This device contains an overriding blanking input (BI) which can be used to control the lamp intensity by pulsing or to inhibit the output.

The absolute maximum ratings of the HD74LS490P can be summarized as:(1)supply voltage: 7.0 V;(2)input voltage: 7.0 V;(3)output current (off state): 1 mA;(4)operating temperature range: -20 to +75 ;(5)storage temperature range: 65 to +150 . If you want to know more information such as the electrical characteristics about the HD74LS490P, please download the datasheet in www.seekic.com or www.chinaicmart.com.