. LSI Logic - Index of

SN54LS222, SN54LS224, SN54LS227, SN54LS228SN74LS222, SN74LS224, SN74LS227, SN74LS22816 X 4 SYNCHRONOUS FIRST·IN FIRST·OUT MEMORIESlogic symbols t'LS222FIFO 16 X4'LS224FIF016X4(3)IR(17) ORDO (5)10 6.7\7(16) 00DO01 (7)02 (8)03 (9) 'LS227FIF016X4CTREN72.3(14)01(13)02(12) 03(3) IR(17) OR'LS228(2)IR(14)OREllfJ)Cl)(.)oS;cCl)en..oJDO (5)01 (7)02 (8)(9)0310 6.70(16) 00(14)01(13)02(12)03DO010203(7)4.50 (13) 001------------1 (12) 01(11) 02(10) 03t These symbols are in accordance with ANSI/IEEE Std 91-1984 and lEe Publication 617-12.These symbols are functionally accurate but do not show the details of implementation; for these, see the functional block diagram. Thesymbol represents the memory as if it were controlled by a single counter whose content is the number of words stored at that time. Outputdata is invalid when the counter ~ontent is O.absolute maximum ratings over operating free-air temperature range (unless otherwise noted)Supply voltage, Vee (See Note 1) ................................... : ........... 7 VInput voltage .............................................................. 7 VOff-state output voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5.5 VOperating free-air temperature range:SN54LS222, SN54LS224, SN54LS227, SN54LS228 . . . . . . . . . . . . . . . . .. - 55 De to 125°eSN74LS222, SN74LS224, SN74LS227, SN74LS228 ...................... ODeto 70 0 eStorage temperature range ......................................... - 65 De to 150 °eNOTE 1: Voltage values are with respect to network ground terminal.TEXAS ..J!1INSTRUMENTSPOST OFFICE BOX 225012 • DALLAS. TEXAS 752652-15