ELM ELM440
The ELM440 is an 8 pin digital divider integrated circuit, that provides both 60Hz and 1Hz outputs from a common 3.58MHz NTSC colourburst crystal. This signal is then further divided to provide a 1Hz output. The ELM440 can also be locked in synchronism to an external 60 or 120 Hz line frequency signal.| Part No. | ELM440 |
|---|---|
| Datasheet | ELM440 Download |
| Manufacturer |  ELM |
| Description | 60Hz Generator |
| Buy | Stock & Price |
DESCRIPTION
Externally, the designer need only provide the crystal and two appropriate loading capacitors, as well as a suitably bypassed power supply. Internal oscillator circuits then use this reference frequency to precisely derive a stable 60Hz signal. If derived from the electrical grid voltage, this results in excellent long-term stability, as the power generation frequency is traceable to national standards. The transition to or from sync-lock with this external signal occurs automatically. A reset input is also provided to restart the internal counters, if desired. An active low signal on this pin will force both outputs to an open or tristate condition.FEATURES
● Low power CMOS design● Wide supply range - 3.0 to 5.5 volt operation
● Generates both 60Hz and 1Hz references
● Automatically synchronizes to the line frequency for long term stability, when it’s available
● Uses a standard 3.58MHz crystal for the time reference if there is no sync input
● High current drive outputs...
