memory products - Al Kossow's Bitsavers

MK45264/45265(N)-55/70(64x5)x2CMOS BIDIRECTIONAL BiPORT FIFOITRANSCEIVER• DUAL 64x5 FIFOs PLUS A '245-TYPE TRAN­SCEIVER FUNCTION• FULLY ASYNCHRONOUS DUAL PORTOPERATIONADVANCED DATA• EMPTY, FULL, ALMOST FULL AND ALMOSTEMPTY STATUS FLAGS• SPARE BITS FOR PARITY AND BEGIN­NING/END-OF-MESSAGE FLAGSNDIP-24(Plastic Package)• +1- 12mA OUTPUT DRIVE CAPABILITY• DUAL Vee AND Vss FOR IMPROVED MARGINAND DRIVE• 300 MIL DIP PACKAGE• APPLICATION: ARBITRATION-FREE /LP.:rO-/LPMESSAGE PASSINGPART ACCESS CYCLE CYCLENUMBER TIME TIME RATEMK45264N-55 55 ns 75 ns 13.3 MHzMK45264N-70 70 ns 95 ns 10.5 MHzMK45265N-55 55 ns 75 ns 13.3 MHzMK45265N-70 70 ns 95 ns 10.5 MHzPIN NAMESVee, VssDQxo-DQx4DQYO-DQY4W;.; WyFlx/DIRGFlyRSEFx, FFyEFy, FFxAEy, AFxAEx, AFy= +5V, GND= X Port Data I/O= Y Port Data I/O= X & Y Port Write Enables= X Port Read Enable andTransceiver Direction Control= Transceiver Enable= Y Port Read Enable= Master Reset= Y-to-X FIFO Empty/Full Flag= X-to-Y FIFO Empty/Full Flag= X-to-Y FIFO Almost Empty/Full= Y-to-X FIFO Almost Empty/FullFIGURE 1. PINOUT. 24 PIN, 300 MIL DIPv •• 1 24 VeeG 223 'NyRx/DIR 3 22 FFyEFx 4 21 DQyoDQxo 5 20 DQYlDQX1 6 19 DQY2DQX2 7 18 DQY3DQ .. 8 17 DQy,DQX4 9 16 EFyFFx 10 15 iiy'Nx 11 14 ASVee 12 13 V ••V.s 1 24 VeeG 223 'Nyiix/DIR 3 22 MyliEx 4 21 DQyODQxo 5 20 DQY1DQX1 6 19 DQY2DQX2 7 18 DQY3DQX3 8 17 DQy,DQX4 9 16 liEyMx 1015 iiy'Nx 11 14 ASVee 12 13 V O•June 19881118This is advance information on a new product now in development or undergoing evaluation. Details are subject to change without notice 457