MC145740 |
RFQ for MC145740 Required Field |
 |
| Product | Manufacturers | Pack | D/C |
| MC145740 | - | SOP-20 | 03+ |
The MC145740 is a silicon gate HCMOS LSI designed for general purpose Dual Tone Multiple Frequency (DTMF) communications, and contains a DTMF signal generator and a receiver for all 16 standard digits.
The generator block has a differential line driver which drives a 600 W load with 0 dBm level. The transmit signal level is adjusted in 1 dB steps by the programmable attenuator.
The receiver block has an Auto Gain Control (AGC) amplifier to demodulate 50 dB (typ) dynamic range of DTMF signals to the hexadecimal codes.
The device also includes a serial control interface that permits a CPU to exercise the following builtin features.
• Single Power Supply: 3.6 to 5.5 V
• DTMF Generator and Receiver for All 16 Standard Digits
• 0 dBm Line Driver Into 600 Load
• AGC Amplifier
• Programmable Transmit Attenuator
• Serial Control Interface
• Power Down Mode, Less Than 1 A
| Symbol | Parameter | Units |
Value |
| VDD | DC Supply Voltage |
V |
-0.5to7.0 |
| Vin | Input Power,All Pins |
V |
-0.5toVCC+0.5 |
| I | DC Current Per Pin |
mA |
±20 |
| PD | Power Dissipation |
mW |
500 |
| TSTG | Storage Temperature Range |
°C |
-65 to 150 |
