L8567

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 short loop power s –40 °C to +85 °C operational temperature range s User-selectable power management techniques s Thermal protection s 32-pin PLCC or 44-pin PLCC packaging De...