1 - Al Kossow's Bitsavers

TMS47648192·WORD BY 8·BIT READ·ONLY MEMORYdata out (a1 -a8)The eight outputs must be enabled by pin 20 before the output word can be read. Data will remain valid until theaddress is changed or the outputs are disabled (chip deselected). When disabled, the three-state outputs are in a highimpedancestate. 01 is considered the least-significant bit, 08 the most-significant bit.The outputs will drive two Series 54/74 TTL circuits without external components.logic symbol t~0s:CCDc:5'CDenIIAOA1ROM8192x8A2 (9)A3A4ASA6 (14)A7A10A11A12S5 ~L.E_N __:J_.......a1a20304a50607a8Pin 20 can be active-high as shown in the upper symbol or active-low asshown in the lower (partial) symbol.tThis symbol is in accordance with IEEE Std 91/ANSI Y32.14 and recent decisions by IEEE and lEe. See explanation on page 10-1.7-14 TEXASINSTRUMENTSPOST OFFICE BOX 225012 • DALLAS, TEXAS 75265