HC55180
features across the product family include: low power consumption, ringing using sinusoidal or trapezoidal waveforms, robust auto-detection mechanisms for when subscribers go on or off hook, and minimal external discrete application ponents. Integrated test access features are also offered on selected products to support loopback testing as well as line measurement tests.
There are five product offerings in the RSLIC18 family: HC55180, HC55181, HC55183 and HC55184. The architecture for this family is based on a voltage feed amplifier design using low fixed loop gains to achieve high analog performance with low susceptibility to system induced noise.
Block Diagram
POL CDC
VBL VBH
ILIM
DC CONTROL
BATTERY SWITCH
RINGING PORT
TIP RING
2-WIRE PORT
TRANSMIT SENSING
4-WIRE PORT
VTX -IN VFB
SW+ SW-
TEST ACCESS
DETECTOR LOGIC
CONTROL LOGIC
F2 F1 F0
RTD RD E0 DET ALM BSEL SWC
Features
- Battery Operation to 100V
- Low Standby Power Consumption of 50m W
- Peak Ringing...
