12.07.2015 Views

1 - Al Kossow's Bitsavers

1 - Al Kossow's Bitsavers

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TMS473240aS-WORD BY 8-BIT READ-ONLY MEMORYdata out (01 - aS)The eight outputs must be enabled by pins 20 and 21 before the output word can be read. Data will remain validuntil the address is changed or the outputs are disabled (chip deselected). When disabled, the three-'state outputsare in a high-impedance state. 01 is considered the least-significant bit, 08 the most-significant bit.The outputs will drive two Series 54/74 TTL circuits with()ut external components.logic symbol t:D0~Cm

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