M-959 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 ponents except a single 3.579 MHz television color burst crystal. The M-959 is typically connected to a loop current sensing circuit, which is connected in series with the voice pair (Tip and Ring) of a telephone line.
M-959 Key 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 Description The M-959 is a low-power dial pulse counter and hook status monitor. Contained i