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| HC55171_03 Datasheet, PDF (3/20 Pages) Intersil Corporation – 5 REN Ringing SLIC for ISDN Modem/TA and WLL | |||
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Block Diagram
HC55171
TIP FEED
TIP SENSE
RING FEED
RING SENSE 1
RING SENSE 2
VREF
RTI
VBAT
VCC
AGND
BGND
2-WIRE
INTERFACE
LOOP CURRENT
DETECTOR
FAULT
DETECTOR
BIAS
CURRENT
LIMIT
RING TRIP
DETECTOR
IIL LOGIC INTERFACE
F1 F0 RS TST
4-WIRE
INTERFACE
+-
RELAY
DRIVER
RDI
VRX
VTX
VRING
- IN 1
OUT 1
SHD
ALM
ILMT
RTD
RDO
3
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