LE79555-4
SLIC (Subscriber Line Interface Circuit)
Product is discontinued and not allowed for new designs.
Overview
| For high density linecards used in short and long loop applications, the Le79555-4 device addresses two design critical requirements: power and space. This innovative SLIC device boasts impressive power savings over other POTS solutions by integrating a switching regulator to enhance system power management. |
Detailed Block Diagram
Features & Benefits
- Control states: Active, Reverse Polarity, Tip Open, Ringing, Standby, and Open Circuit
- Low Standby power
- -40 to -58 V battery operation
- On-hook transmission
- Two-wire impedance set by single external impedance
- Programmable constant-current feed
- Low Off-Hook Active Overhead Voltage
- Programmable loop-detect threshold
- Ground-start detector
- Programmable ring-trip detect threshold
- No -5 V supply required
- Three on-chip relay drivers and relay snubbers, one ringing and two general purpose
- Tip Open state for ground-start lines
- On-chip switching regulator for Low power dissipation
- Supports 30 mA for Active, Normal, and Reverse Polarity operation
