AM9557CC

The AM9557CC is a four channel direct memory access controller which permits the high speed transfer of data directly between peripherals and memory in microcomputer systems.It maintains a byte count for each channel and issues a terminal count signal upon completion of the programmed number of transfers.

Distinctive characteristics of the  AM9557CC are:(1)direct plug-in replacement for intel 8257;(2)four DMA channels with individual word count and address registers;(3)single TTL clock;(4)single +5V supply;(5)standard 40 pin DIP;(6)military version available;(7)100% MIL-STD-883 reliability assurance testing.

The maximum ratings of the AM9557CC can be summarized as:(1):the parameter is ambient temperature under bias,the rating is 0 to +70,the unit is ;(2):the parameter is storange temperature,the rating is -65 to +150,the unit is ;(3):the parameter is voltage on any pin with respect to ground,the rating is -0.5 to +7.0,the unit is V;(4):the parameter is power dissipation,the rating is 1.0,the unit is W.