MV5087 Datasheet - GEC Plessey

MV5087 DTMF GENERATOR

Positive Power Supply Emitter output of a bipolar transistor whose collector is connected to VDD. With no keyboard input this output remains at VDD and a keyboard input changes the output to a high impedance state. The state of Single Tone Inhibit input has no effect on XMITR output. These inputs ar.

MV5087 MV5087 DTMF GENERATOR DS3125-2.0 June 1993 The MV5087 is fabricated using ISO-CMOS high density technology and offers low power and wide voltage operation. An inexpensive 3.58MHz TV crystal completes the reference oscillator. From this frequency are derived 8 different sinusoidal frequencies which, when appropriately mixed, provide Dual-Tone Multi-Frequency (DTMF) tones. Inputs are compatible with either a standard 2-of-8 or a single contact (form A) keyboard. The keyboard entries dete.

MV5087 Features

* s Pin-for-Pin Replacement for MK5087 s Low Standby Power s Minimum External Parts Count s 3.5V to 10V Operatlon s 2-of-8 Keyboard or Calculator-Type Single Contact (Form A) Keyboard Input s On-Chip Regulation of Output Tone s Mute and Transmitter Drivers On-Chip s High Accuracy Tones Provided by 3.5

MV5087_GECPlessey.pdf