HD74LS47

HD74LS47 features active-low outputs designed for driving incandescent indicators directly.This device has full rippleblanking input/output controls and a lamp test input.Display patterns for BCD input counts above 9 are unique symbols to authenticate input conditions.This ciruit incotporates automatic leading and/or tailling-edge zero-banking contol(RBI and RBO).Lamp test (LT) of these types may be performed at any time when the BI/RBO node is at a high level.It contains an overriding blanking input(BI)which can be used to control the HD74LS47 lamp intensity of pulsing or to inhibit the outputs.Inputs and outputs are entirely compatible for use with TTLL or DTL logic outputs.

The absolute maximum ratings of the HD74LS47 can be summarized as:(1)supply voltage:7.0V; (2)input voltage:7.0V; (3)output current:200mA; (4)output cuurent(off-state):1mA; (5)operating temperature range:-20~75; (6)storage temperature range:-65~150.

If you want to know more information such as the electrical characteristics of HD74LS47, please download the datasheet in www.seekic.com or www.chinaicmart.com.