PBL3853
Description
The PBL 3853 is a biopolar integrated speech circuit with specific parameters making it highly suitable to be used as a line interface and speech circuit in a telephone line powered electronic payphone. Emphasis has been put on low current consumption in the IC thus facilitating that a greater part of the available line current can be used to power other electrical functions in the design.
Key Features
- Low own current consumption
- Can operate both with active and passive impedance towards the line
- Derives a high current from the line for auxiliary functions, 12 mA at 16 mA line current
- Separate mute inputs for transmitter and receiver (receiver cut off)
- Line length regulation possible (line loss compensation
- Comes in 18 pin DIP and 20-pin SO package
- High line current operation, max. 130 mA
- Especially suitable for payphone applications
- DTMF - confidence tone input
- Excellent RFI performance 1 9 PBL 3853 5 4 10 +V - + 12 - 8 18 P 18-pin plastic DIP MA Rx 13 Tx B P B L 38 20-pin plastic SO + L 53 16 6 14 11 3 2 17 15 Figure
