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Data Sheet August 1999
L8567 SLIC for People’s Republic of China Applications
Features
s Low active power (typical 149 mW during on-hook transmission)
s Sleep state for low idle power (47 mW typical)
s Quiet tip/ring polarity reversal
s Distortion-free on-hook transmission
s –35 V to –65 V battery operation
s Convenient operating states: — Forward active — Polarity reversal active — Sleep — Forward disconnect
s Supervision functions: — Fixed threshold off-hook detector with longitudinal rejection and hysteresis — Ring trip detector — Thermal shutdown indication
s Adjustable loop current limit
s Three driver outputs for relay driver
s LED driver output to indicate off-hook
s Latched parallel data interface
s Battery and +5 V required: — Optional auxiliary lower voltage battery to reduce s
L8567 Datasheet
