AM8228 AMD | Alldatasheet
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System Controller and Bus Driver for 8080A Compatible Microprocessors Distinctive Characteristics ae . - . . ° © Bi-directional three-state bus driver for CPU indepen- © Multi-byte instruction interrupt acknowledge dent operation e Selectable single level vectored interrupt (RST-7) ® Advanced low-power Schottky processing © 28-pin molded or hermetic DIP package © Available in military and commercial temperature © Single chip system controller and data bus driver for range Am9080/8080A systems ‘© Am8238 has extended TOW/MEMW pulse width © Am8238-4 high speed version available for use with Tusec instruction cycle of Am9080A-4 FUNCTIONAL DESCRIPTION Loic symBo The Am8228 and Am8238 are single chip System Controller Data Bus drivers for the Am9080A Microcomputer System, They generate al! control signals required to directly interface 2 Am9080A/8080A compatible system circuits (memory and ‘ 1/0) to the CPU. 2 d Bi-directional bus drivers with three-state outputs are provided 6 2p MOKA DBIN TER ogo} 8 for the system data bus, facilitating CPU independent bus 2 er my * operations such as direct memory access. Interrupt processing to bs . on ° is accommodated by means of a single vectored interrupt or ° og OYRECTuONAL ooo : by means of the standard 8080A multiple byte interrupt vector ” os 25 * operation. s ss EY s IC DIAGRAM MErRfoO—= 24 LOGIC DIAGRA\\ 1+ as orwfp—— 2 STRORE Tenbo—— 2 ° on 2 ofr Tap—— 2 2 on | oxrag 2 ergimecrionAL gn a
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BS oe Vee = Pin 28 ° ae GND = Pin 14 UC-629 [e 1 b—— sara CONNECTION DIAGRAM LE |---| Top View sans Fo pone ckor [7] [ganna ere CJ 2D vce m= F eo tow moa (2 nf ow oan od ams = sew uc 628 o%4 Cs [5 wm MATION oe 25 oma ORDERING INFORMATIOI os) Eq? oan 2 fy wen arate, Am8228 Am8238 oC FP Package Temperature Order Order oes fs i Type Range Number __ Number Ri oe es — amr Number es °5 Molded DIP °C 0 470°C AMB228PC AMB238PC ste “ Hermetic DIP 0°C to 470°C 08228 8238 oC" ef 8s Hermetic DIP -55°C 10 +128°C AMB2280M AMB2380M ee oe. Dice O°C to +70°C AMB228XC AM8238XC Hermetic DIP Co +70°C AM8238-40C* 2% Ce [9 Molded DIP O°C to +70°C AMB238-4PC* ow Ff eo *For use with AmS080A-4 with minimum clock period of 260ns. Note: Pin 1 is marked for orientation. 1c-690 6-21