DISTINCTIVE CHARACTERISTICS
■ Ideal for low power sensitive applications
■ Low standby power (normal and reverse)
■ Automatic on-chip battery switching
■ On-chip thermal management
■ On-chip thermal shutdown
■ –20 V to –60 V battery operation
■ Programmable current limit
■ Programmable resistive feed
■ Programmable loop-detect threshold
■ Selectable overhead for metering applications
■ Two-wire impedance set by single external impedance
■ On-chip ring and test relay drivers and relay snubber circuits
■ Polarity reversal (full transmission)
■ Loop and ground-key detector
■ Comparator for ring-trip detection
■ Ground-start capability
■ On-hook transmission