CMX808A View Datasheet(PDF) - CML Microcircuits

Part Name

Description

Manufacturer

CMX808A

Family Radio CTCSS ‘Type 2’ Encoder and Decoder

CML Microcircuits 

Family Radio CTCSS 'Type 2' Encoder and Decoder

1.4 External Components

CMX808A

C1 22pF

C2 22pF

C3 0.1µF

C4 0.1µF

C5 100pF

C6 0.1µF

C7 Note 1

C8 0.1µF

±20%

±20%

±20%

±20%

±20%

±20%

±20%

±20%

R1 1MW

R2 22kW

R3 100kW

R4 Note 1

±5%

±10%

±10%

±10%

X1 4.0MHz ±100ppm

Note: 1. R3, R4, C5 and C7 form the gain components for the Rx Input Amplifier. R4 should be

chosen as required by the signal level, using the following formula:

R3

Gain = −

R4

C7 x R4 should be chosen so as not to compromise the low frequency performance of this

product.

Figure 2 Recommended External Components

© 1999 Consumer Microcircuits Limited

6

D/808A/5

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