1 - Al Kossow's Bitsavers

tt(REH)TCHLLtAEL-RELRAS rise time (MAX TMS4500A-15 Spec.)ALE inactive delay (MAX 8088 Spec.)Time delay, ALE low to RAS starting low (MAX TMS4500A-15Spec. *)thus,(200 + 118 - 150 - 30 - 15 + 85 + 27) ns235 ns*This value should otherwise be a minimum value; however, as all propagation delays on a given chip will tendto track each other, the maximum value is multiplied by a skew factor to reflect variations in same chip propagationdelays. The skew factor for the TMS4500A is 0.9. All values follow by an asterisk are obtained bymultiplying the specified maximum value by 0.9.5100IROY -,..---LMN/MX ADO·AD7ALE ALE CAs enDQ4A8·A1386~RAO·RA7 MAO· AO·A7CA1-CA6 MA7 cr TMS4416A17TMS4416CS101MIA16RENIFA -4,AD RASlRAS DQ1·WR ACW-- en DQ48088TMS4500A '-- AO·A7OQ4GW TM~16TMS441615MHZ5 Xl ~D Qr-8284A ~ 74S74T X2 OSC I--- ~CREADY ClK5100I 1 lS04----T+5V READY ClK ClK ROY RASO RAS DQ1·':'"81-WL4,DQ1.~DQ4DQ1'~•FIGURE 1 - TMS4500A/8088 INTERFACE SCHEMATIC9-64