(China (Mainland))
Product Summary
The MT8885AN is a monolithic DTMF transceiver with call progress filter. It is fabricated in CMOS technology offering low power consumption and high reliability. The receiver section is based upon the industry standard MT8885AN DTMF receiver while the transmitter utilizes a switched capacitor D/A converter for low distortion, high accuracy DTMF signalling. Internal counters provide a burst mode such that tone bursts can be transmitted with precise timing. A call progress filter can be selected allowing a microprocessor to analyze call progress tones. The MT8885AN utilizes an adaptive micro interface, which allows the device to be connected to a number of popular microcontrollers with minimal external logic. The MT8885AN provides enhanced power down features. The transmitter and receiver may independently be powered down via register control. A full chip power down pin provides simple power and control capability. Applications include Credit card systems, Paging systems, Repeater systems/mobile radio, Interconnect dialers and Personal computers.
Parametrics
MT8885AN absolute maximum ratings: (1)Power supply voltage: 6 V; (2)Voltage on any pin: VSS-0.3 TO VDD+0.3 V; (3)Current at any pin (Except VDD and VSS): 10 mA; (4)Storage temperature: -65 +150℃; (5)Package power dissipation: 1000 mW.
Features
MT8885AN features: (1)External power down pin; (2)Central office quality DTMF transmitter/receiver; (3)Low power consumption; (4)High speed adaptive micro interface; (5)Adjustable guard time; (6)Automatic tone burst mode; (7)Call progress tone detection to -30dBm; (8)DTMF transmitter/receiver power down via register control.
Diagrams
