Part number:
MV5089
Manufacturer:
Plessey
File Size:
163.58 KB
Description:
Dtmf generator.
Datasheet Details
Part number:
MV5089
Manufacturer:
Plessey
File Size:
163.58 KB
Description:
Dtmf generator.
MV5089, DTMF Generator
Voo Positive Power Supply TONE DISABLE This input has an internal pull-up resistor to Voo.
When connected to Vss no tones are generated by any key depression allowing the keyboard to be used for purposes other than DTMF signalling.
COLUMN 1-4 These CMOS inputs are held at Voo by an internal pu
MV5089 MV5089 DTMF GENERATOR The MV5089 is fabricated using Plessey Semiconductors' 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 MultiFrequency (DTMF) tones.
Inputs are compatible with a standard 2-of-8 active-low keyboard and the keyboard entries determine the correct div
MV5089 Features
* Pin-far-Pin Replacement for MK5089
* Low Standby Power
* Minimum External Parts Count
* 2.75V to 10V. Operation
* 2-of-8 Keyboard Input
* High Accuracy Tones Provided by 3.58MHz Crystal Oscillator
* Pin-Selectable Inhibit of Single Tone Gener
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