UTC1240A Electronic Dual-Tone Ringer
7924 -24V Negative Voltage Regulator IC
55NF06 N-Channel Power Mosfet Transistor 60V 55A
RU3 Diode
Stereo Socket to P38 Stereo Pin Connector
BCR1AM Lead-Mount Triac
2A Slide Switch 4 Way
LM311 Voltage Comparator IC
74LS541 Octal Buffer Line Driver IC
CD4010 Hex Buffer Converter IC
- Hex Buffer/Converter
- Input Current: ±10mA
- Power Dissipation:Â 300mW
- High level Output Voltage:Â 5.0V
- Low level Output Voltage Max.:Â 0.05V
- High level Input Voltage:Â 2.75V
- Low level Input Voltage:Â 2.25V
- Low level Output Current:Â 7mA
- High level Output Current:Â -1.2mA
- Propagation Delay Time Max.:Â 200ns
- Package:Â DIP-16
74LS163 Synchronous 4-Bit Binary Counter IC
- Synchronous 4-Bit Binary Counter
- High-level input voltage:Â 2V
- Low-level input voltage:Â 0.8V
- High-level output current:Â -0.4mA
- Low-level output current:Â 8mA
- Input clamp voltage:Â -1.5V
- Maximum clock frequency:Â 25MHz
- Propagation delay time:Â 38ns
- Supply voltage range:Â 4.75 to 5.25V
- Package:Â DIP-16