Description:

The NTE3882 Counter Timer Circuit (CTC) is a programmable, four channel device in a 28–Lead DIP type package that provides counting and timing functions for the NTE3880. The NTE3880 configures the NTE3882’s four independent channels to operate under various modes and conditions as required.

Structure:

● N–Channel Silicon Gate Depletion Load Technology

● Single 5V Supply

● Single Phase 5V Clock

● Four Independent Programmable 8–Bit Counter/16–Bit Timer Channels

Features:

● Each Channel may be Selected to Operate in Either a Counter Mode or Timer Mode

● Programmable Interrupts on Counter or Timer States

● A Time Constant Register Automatically Reloads, the Down Counter at Zero

and the Cycle is Repeated

● Readable Down Counter Indicates Number of Counts–to–Go until Zero

● Selectable 16 or 256 Clock Prescaler for Each Timer Channel

● Selectable Positive or Negative Trigger may Initiate Timer Operation

● Three Channels have Zero Count/Timeout Outputs capable

of Driving Darlington Transistors

● Daisy Chain Priority Interrupt Logic Included to Provide for

Automatic Interrupt Vectoring without

External Logic

● All Inputs and Outputs Fully TTL Compatible