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STMicroelectronics's L3845-20 is a trunk interface 20-pin so. in the drivers and interfaces, specialized interfaces category. Check part details, parametric & specs and download pdf datasheet from datasheets.com, a global distributor of electronics components.
STMicroelectronics L3845-20 Series Interface - Specialized are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for STMicroelectronics L3845-20 Series Interface - Specialized.
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l3845-20 trunk interface . on chip polarity guard meets dc line characteristics of either ccitt and eia rs 464 specs pulse function high ac impedance off hook-status detection output low external component count. description the circuit provides dc loop termination
An external low voltage electrolytic capacitor. causes the circuit to exhibit a very high imped- ance to all AC signal above a minimum frequency. that is determined by the c apacitor itself and by a. 20 K nom inal resistor integrated on the chip. The Off-Hook status is detected all t he time a. typic of 8 mA is flowing into the circuit.
HIGH AC IMPEDANCE. OFF HOOK-STATUS DETECTION OUTPUT. LOW EXTERNAL COMPONENT COUNT. DESCRIPTION. The circuitprovides DC loop termination for ana- log trunk lines. The V-Icharacteristics is equivalent to a fixed. voltage drop (zener like characteristic)in series. with an external resistance that determines the. slope of the DC characteristic.
l3845 trunk interface on chip polarity guard meets dc line characteristics of either ccitt and eia rs 464 specs pulse function high ac impedance off hook-status detection output