MV5087 GEC Plessey, MV5087 Datasheet
MV5087
Available stocks
Related parts for MV5087
MV5087 Summary of contents
Page 1
THIS DOCUMENT IS FOR MAINTENANCE RECOMMENDED FOR NEW DESIGNS 4 DataSheet U .com PURPOSES ONLY AND IS NOT ...
Page 2
... 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. ...
Page 3
... MV5087 ABSOLUTE MAXIMUM RATINGS Voltage on any pin Current on any pin Operating temperature Storage temperature DC ELECTRICAL CHARACTERISTICS Test conditions (unless othenwise stated + 3.5V to 10V amb DD Characteristics Operating Supply Voltage Standby Supply Current Operating Supply Current SINGLE TONE Input High Voltage ...
Page 4
... ROW ROW INPUT COL ROW COLUMN INPUT COLUMN ROW MV5087 . With DD and a keyboard input changes the DD with a DD and sense a valid logic level (Approx Input to ...
Page 5
... MV5087 OUTPUT FREQUENCY Table 1 shows the output frequency deviation from the standard DTMF frequencies when a 3.58MHz crystal is used as the reference. The row and column output waveforms are digitally synthesised using R-2R D-to-A converters (see Fig.6), resulting in a ‘staircase’ approximation to a sinewave. An opamp mixes these tones to produce a dual-tone waveform ...
Page 6
... DataSheet U .com COL COL 2 4 COL COL MV5087 ROW ROW ROW ROW MUTE SS Figure 7: Connection diagram MV5087 SINGLE TONE INHIBIT 3.58 MHz XTAL XMITR TONE OUTPUT ...