JAJSN63G December 1982 – October 2021 SN54HC138 , SN74HC138
PRODUCTION DATA
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The SN74HC138 is useful as a scanning column selector for an LED Matrix display as it can be used for the low side drive of the LED string. The decoder functionality ensures that no more than one output is pulled to a low-level logic voltage so that only a single column is enabled at any point in time.