HC3-5504B-5

The HC3-5504B-5 is a kind of EIA/ITU PABX SLIC. It includes DC battery feed, a ring relay driver, supervisory and hybrid functions. The device is intended to maintain transmission performance in the presence of externally induced longitudinal currents. The typical applications of HC3-5504B-5 include solid state line interface circuit for analog and digital PBX systems, direct inward dial (DID) trunks and voice messaging PBXs.

There are some features of HC3-5504B-5 as follows: (1) pin for pin replacement for the HC-5504; (2) capable of 5 V or 12 V (VB+) operation; (3) monolithic integrated device; (4) DI high voltage process; (5) compatible with worldwide PBX performance requirements; (6) controlled supply of battery feed current for short loops (41 mA); (7) internal ring relay driver; (8) allows interfacing with negative superimposed ringing systems; (9) low power consumption during standby; (10) switch hook ground key and ring trip detection functions; (11) selective denial of power to subscriber loops.

The following is the absloute maximum ratings of HC3-5504B-5: (1): operating temperature is from -25 to +75; (2) relay driver voltage (VRD) is from 5 to 12 V; (3): positive supply voltage (VB+) is from 4.75 to 5.25 or from 10.8 to 13.2 V; (4): negative supply voltage (VB-) is from -42 to -58 V; (5): high level logic input voltage is 2.4 V; (6): low level logic input voltage is 0.6 V; (7): loop resistance (RL) is from 200 to 1200 .