Description
ECG1690 Telephone DTMF Dialer ~ 16 Pin DIP (NTE1690)
The ECG1690 is a monolithic integrated circuit in a 16−Lead DIP type package fabricated using CMOS process and is designed specifically for integrated tone dialer applications.
Features:
- High Accuracy Tones
- Digital Divider Logic, Resistive Ladder Network and CMOS Operational Amplifier on a Single Chip
- Uses Inexpensive 3.579545MHz Television Color Burst Crystal
- Invalid Key Entry Can Result in Either Single Tone or No Tone
- Tone Disable Allows Any Key Down Output to Function from Keyboard Input Without Generating Tones
Functions:
- Fixed Supply Operation
- Negative−True Keyboard Input
- Tone Disable Input
- Stable−Output Level
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
- Supply Voltage, VDD: 10.5V
- Any Input Relative to VDD (Except Pin10), VN: 0.3V
- Any Input Relative to GND (Except Pin10), VN: −0.3V
- Power Dissipation, PD: 500mW
- Operating Temperature Range, Topr: −30° to +60°C
- Storage Temperature Range, Tstg: −55° to +150°C
