MC68B40CP

The MC68B40CP is one member of the MC6840 family,this family is a programmable subsystem component of the M6800 family designed to provide variable system time intervals.It has three 16-bit binary counters,three corresponding control registers and a status register.These counters are under software conrol and may be used to cause system interrupts and or generate output signals.

Features of the MC68B40CP are:(1)operates from a single 5-volt power supply;(2)fully TTL compatible;(3)single system clock required(enable);(4)selectable prescaler on timer 3 capable of 4 MHz for the MC6840;(5)programmable interrupts output to MPU;(6)readable down counter indicates counts to go until time-out;(7)selectable gating for frequency or pulse-width comparison;(8)three asynchronous external clock and gate trigger inputs internally synchronized;(9)three maskable outputs.

The absolute maximum ratings of the MC68B40CP can be summarized as:(1)supply voltage:-0.3 to 7.0 V;(2)input voltage:-0.3 to 7.0 V;(3)operating temperature range:0 to 70;(4)storage temperature range:-55 to +150;(5)thermal resistance cerdip:65/W;(6)thermal resistance plastic:100/W;(7)input high voltage:Vss+2.0 to Vcc V;(8)input low voltage:Vss-0.3 to Vss+0.8 V.If you want to know more information such as the electrical characteristics about the MC68B40CP,please download the datasheet in www.seekdatasheet.com .