FX105A

Features:

` Operates in High Noise Conditions
`36dB Signal Input Range
` High Sensitivity
` Low Power
` Adjustable Bandwidth
` Adjustable Frequency
` Wide Voltage Range (2.7V to 5.5V)
` Single and Multitone System Applications


Specifications

Exceeding these maximum ratings can result in damage to the device.
                                                                   Min.                           Max.                        Units
Supply (V_DD - V_SS)                                     -0.3                             7.0                             V
Voltage on any pin to V_SS                          -0.3                          V_DD + 0.3                     V
Current into or out of V_DD and V_SS pins      -30                            +30                           mA
Current into or out of any other pin             -20                             +20                          mA
Maximum Output Switch Load Current                                           +10                          mA


Description

The FX105A is a monolithic CMOS tone operated switch, designed for tone decoding in single and multitone signalling systems. The FX105A uses decoding techniques which allow a tone to be recognised in the presence of high noise levels or strong adjacent signals. Detection centre frequency and bandwidth can each be independently adjusted. The design is immune to high levels of harmonic and sub-harmonic interference. Excellent noise immunity and constant bandwidth are maintained over a wide range of input signal levels.