HT18LG

Supply Current :
Operating Temperature Range :
Mounting Style : SMD/SMT
Operating Supply Voltage : 0 V to 7 V
Package / Case : SOIC-8
Packaging : Reel
Type : Multimode SCSI 14 Line Terminator


Features:






Specifications






Description

      This is the General Description: The Supertex HT18LG and HT19LG are electronic line switch circuits that replace the mechanical hook switch contact or a discrete hook switch in a telephone handset or modem. They switch the positive side of the telephone line using control inputs that are referenced to the negative side of the line. In their off state, they can withstand 350V on the positive input. In their on state, they have a maximum series resistance of 18.
      The devices HT18LG provide current limiting determined by an external resistor. There are three control inputs. The HKS pin turns on the hook switch when connected to the TPG pin. This can be accomplished by using a mechanical switch which closes when the handset is physically off-hook. The LS pin allows a logic signal to turn on the hook switch. The dial pulse, Pin 6, is used to turn the hook switch off for pulse dialing. For the HT18, the dial pulse is active high (DP), whereas for the HT19, it is active low (DP).
      And these are the HT18LG Features: the first one is 350V breakdown voltage. And the second one is 18 maximum switch resistance. The third one is Current limiting protection. The forth one is Operates at 2.3V input.
      And these are the HT18LG Absolute Maximum Ratings: firstly, the Input line voltage is +350V. Secondly, the Output line voltage is+18V. Thirdly, the continuous input voltage is +10V. Fourthly, the Storage temperature is from -65°C to +150°C. Fifthly, the Junction temperature is +150°C. Sixthly, the Soldering temperature is+300°C. At last, the Power dissipation is 0.8W.