HC5549 Key Features
- Dual Battery Operation
- Single Additional +5V Supply
- Low Standby Power Consumption (48V, 35mW)
- On Hook Transmission
- Tip and Ring Disconnect
- Soft or Hard Polarity Reversal
- Supports 12 kHz or 16 kHz Pulse Metering
- Ring Relay Driver
- On Chip 2-wire AC/DC Loopback
- No Latch-Up or Power Supply Sequencing