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HT19, HT-190D, HT190YG

Table of contents:
Info of HT19
Info of HT-190D
Info of HT190YG

HT19, HT-190D, HT190YG Selling Leads, Datasheet

MFG:NI Package Cooled:SOP-8P D/C:04+

HT19, HT-190D, HT190YG Datasheet download

Five Points

Part Number: HT19

MFG: NI

Package Cooled: SOP-8P

D/C: 04+

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HT19 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 the off state, they can withstand 350V on the positive input. In the on state their series resistances are 18 maximum. The devices 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).

HT19 Maximum Ratings

V_TPG, Input line voltage                      +350V
V_TP, Output line voltage                      +18V
DP/DP continuous input voltage            +10V
Storage temperature         65 to +150
Junction temperature                        +150
Soldering temperature*                    +300
Power dissipation                            0.8 Watt
Notes: All voltages are referenced to ground.
           *Distance of 1.6mm from case for 10 seconds.

HT19 Features

` 350V breakdown voltage
`18 maximum switch resistance
` Current limiting protection
` Operates at 2.0V input

HT19 Typical Application

· Telephone handsets
· Modems
· Fax machines
· Answering machines
· Remote meter reading
· Phone interface products

HT19 Connection Diagram

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