HC-5504B1 feed equivalent, itu low cost/ pabx slic with 40ma loop feed.
* Low Cost Version of the HC-5504B
* Capable of 5V or 12V (VB+) Operation
* Monolithic Integrated Device
* DI High Voltage Process
* Compatible With W.
* Solid State Line Interface Circuit for Analog and Digital PBX Systems
Pinout
HC-5504B1 (PLCC) TOP VIEW
RFS RING T.
28 PIN PLCC 2 SYMBOL TIP DESCRIPTION An analog input connected to the TIP (more positive) side of the subscriber loop through a 150Ω feed resistor and a ring relay contact. Functions with the Ring terminal to receive voice signals from the telephone.
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