Brief Description
The FX611 is a single-chip, low-power CMOS tone detector designed for use in both the PABX and general payphone applications for Subscriber Private Metering.

FEATUREs/Applications
● Meets 12kHz and 16kHz SPM Specifications
● Tone Follower and SPM Packet Detection Modes
● Adjustable Input Gain Low-Power 5V CMOS Process
● PABX and Payphone Applications
● General Purpose Pulse Detection
● Surface Mount and DIL Package Styles
● Crystal Controlled