The HC5526 is a subscriber line interface circuit that is compliant with CCITT standards. Enhancements include immunity to circuit latch-up during hot plug and absence of false signaling in the presence of longitudinal currents. The HC5526 is fabricated in a High Voltage Dielectrically Isolated (DI) Bipolar Process that eliminates leakage currents and device latch-up problems normally associated with Junction Isolated (JI) ICs. The elimination of the leakage currents results in improved circuit performance for wide temperature extremes. The latch free benefit of the DI process guarantees operation under adverse transient conditions. This process feature makes the HC5526 ideally suited for use in harsh outdoor environments.
The HC5526 is a subscriber line interface circuit (SLIC) compliant with CCITT standards. It is fabricated in a high‑voltage dielectrically isolated bipolar process, offering low standby power and immunity to latch‑up, making it suitable for harsh outdoor environments.
The document provides detailed pin descriptions, electrical specifications, absolute maximum ratings, and application circuit examples, along with package dimensions for the 28‑lead PLCC version.
| Battery Voltage Range | -24V to -58V |
|---|---|
| Operating Temperature Range | -40°C to 110°C |
| Supply Voltage Voc to GND | 0.5V to 7V |
| Ring Relay Supply Voltage | 0V to 20V |
| Programmable Current Feed | 20 mA to 60 mA |
The devices are sensitive to electrostatic discharge, so proper IC handling procedures must be followed.
The HC5526 can operate from –40 °C up to 110 °C.
The HC5526 is supplied in a 28‑lead PLCC package (N28.45).