MEMORY DATABOOK - Al Kossow's Bitsavers

OKI semiconductorMSM38128ARS16,384 WORD x 8 BIT MASK ROM (E3-5-028-32)GENERAL DESCRIPTIONThe MSM38128ARS is an N-channel silicon gate MOS device MASK ROM with a 16,384 word x 8 bit capacity. Itoperates on a 5V single power supply and the all inputs and outputs are TTL compatible. The adoption of an asyn·chronous system in the circuit requires no external clock assuring extremely easy operation. The avaUability of powerdown mode contributes to the low power dissipation which is as low as 30mA (max) when the chip is not selected.The application of a byte system and the pin compatibility-with standard UV EPROMs make the device most suitablefor use as a large-capacity fixed memory for microcomputers and data terminals.As it provides CE, OE, and CS as the control signal, the connection of output terminals of other chips with the wiredOR is possible ensuring an easy expand operation of memory and bus line control.FEATURES• 5V single power supply• 16384 words x 8 bits• Access time: 250 ns MAX• Input/output TTL compatible.3-state output• Power down mode• 28-pin DIPFUNCTIONAL BLOCK DIAGRAMPIN CONFIGURATION11NC(Top View)1 '--" 28 VeeA" 2 27 CS(CSJfNCiA, 3 26 A"A. 4 25 A,A, 5 24 A,A. 6 23 A"A, 7 22 OE (OE)A, 8 21 A"A, 9 20 CEA. 10 19 0,Do 11 18 D.0, 12 17 0,A.A,A,A,A.A,A.A, bufferA,A,A"A"A"A"OE CEControl--0 Vee-...oVssCSorCS orNCDEarOE0, 13 16 D.V .. 14 15 0,OE Output enableVee, Vss Power supplyAo"'" Au Address input~- 07 Data outputCEChip enableCh ip sel actesNote: Please specify the OE activelevel and CS active level oropen in ordering this IC.330