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CMX641A

DUAL SPM/SECURITY DETECTOR/GENERATOR

CML Microsystems Plc 

Dual SPM/Security Detector/Generator

CMX641A

(iii) The outputs can be set to a high impedance state for device multiplexing.

OP ENABLEN

0

0

1

OP SELECT

0

1

X

CH1 & CH2

OP FORMAT

Packet Mode

Tone Follower Mode

High Z

Table 1 Selection of Output Format via OP ENABLEN and OP SELECT pins

1.5.2.1 Fixed Bandwidth Operating State (ENHANCED FEATURES pin = logic ‘0’ or Open Circuit)

This state is selected by leaving pin 13 open circuit. In this state, the CMX641 has full pin, function and

software compatibility with the FX641 and MX641. There are two operating modes: Controlled and

Fixed Sensitivity.

© 2002 Consumer Microcircuits Limited

11

D/641A/5

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