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CMX264D5

Frequency Domain Split Band Scrambler

CML Microcircuits 

Frequency Domain Split Band Scrambler

1.3 Signal List (continued)

CMX264

Package

D5

Signal

Pin No.

Name

15

-

16

MUTERX

17

EXTO

18

-

19

RECO

20

-

21

CSN

22

SCLOCK

23

SDATA

24

VDD

Description

Type

-

This pin should be left unconnected.

I/P A logic input which when high (VDD) immediately

de-activates the two Rx outputs (RECO and

EXTO), overriding the serial data previously

loaded. When this input is low (VSS), the Rx

outputs are controlled by the serial data port.

O/P One of two Rx outputs. This is used for routeing

the recovered audio to external devices, e.g. a

speakerphone. This output may be

independently activated or de-activated by

selecting the appropriate internal state. When

de-activated, either by the serial data or by the

MUTERX pin, the output is set to VBIAS.

-

This pin should be left unconnected.

O/P The other Rx output. This is used for routeing

the recovered audio to the telephone

loudspeaker. This output may be independently

activated or de-activated by selecting the

appropriate internal state. When de-activated,

either by the serial data or by the MUTERX pin,

the output is set to VBIAS.

-

This pin should be left unconnected.

I/P )The serial port input pins. Data applied here

I/P )sets up the internal state of the device, e.g. split

I/P )point, scramble/clear, etc. See Figure 10.

POWER

The positive supply rail. This pin must be

decoupled to VSS by a capacitor mounted close

to the device.

Notes: I/P = Input

O/P = Output

BI = Bidirectional

© 1999 Consumer Microcircuits Limited

5

D/CMX264/1

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