STMicroelectronics L3845
The circuit provides DC loop termination for analog trunk lines. The V-I characteristics is equivalent to a fixed voltage drop (zener like characteristic) in series with an external resistance that determines the slope of the DC characteristic.| Part No. | L3845 |
|---|---|
| Datasheet | L3845 Download |
| Manufacturer |  STMicroelectronics |
| Description | TRUNK INTERFACE |
| Buy | Stock & Price |
DESCRIPTION
An external low voltage electrolytic capacitor causes the circuit to exhibit a very high impedance to all AC signal above a minimum frequency that is determined by the capacitor itself and by a 20 K nominal resistor integrated on the chip. The Off-Hook status is detected all the time a typic of 8 mA is flowing into the circuit. In this condition a constant current generator is activated to BLOCK DIAGRAM Minidip SO8 SO20W (12+4+4) ORDERING NUMBERS: L3845B L3845D L3845-20 supply an external device (typically an optocoupl
