Description
The M-959 is a low-power dial pulse counter and hook status monitor. Contained in a 14-pin package, the M-959 requires no external components except a single 3.579 MHz television color burst crystal.

FEATUREs
• Time-guarded dial pulse counting
• 10 or 20 PPS dialing speeds pin selectable
• Tri-state data outputs
• Valid data output strobe
• Data strobe control for use in interrupt-driven
   environments
• Independent hook status monitoring
• Low-power CMOS construction