350V breakdown voltage maximum switch resistance Current limiting prot

The Datasheet Archive - 100 Million Datasheets from 7500 Manufacturers.

350V breakdown voltage maximum switch resistance Current limiting prot

Datasheet Thumbnail

Top Searches for this datasheet

HT18/ HT19 Electronic Telephone Line Switch
350V breakdown voltage maximum switch resistance Current limiting protection Operates 2.3V input
Supertex HT18LG HT19LG electronic line switch circuits that replace mechanical hook switch contact discrete hook switch telephone handset modem. They switch positive side telephone line using control inputs that referenced negative side line. their state, they withstand 350V positive input. their state, they have maximum series resistance devices provide current limiting determined external resistor. There three control inputs. turns hook switch when connected pin. This accomplished using mechanical switch which closes when handset physically off-hook. allows logic signal turn hook switch. dial pulse, used turn hook switch pulse dialing. HT18, dial pulse active high (DP), whereas HT19, active (DP).
Applications
Telephone handsets Modems machines Answering machines Remote meter reading Telephone interface products
Typical Application Circuit
RSEN
Transient Protection
HT18 HT19
DP/DP Telecom Circuit
Ring
HT18/HVT19
Ordering Information
Device HT18 HT19 Package Options 8-Lead SOIC (Narrow Body) HT18LG HT19LG HT18LG-G HT19LG-G
indicates package RoHS compliant (`Green')
Absolute Maximum Ratings
Parameter VTPG, Input line voltage VTP, Output line voltage DP/DP continuous input voltage Storage temperature Junction temperature Soldering temperature Power dissipation
Configuration
Value
DP/DP
+350V +18V +10V -65°C +150°C +150°C +300°C 0.8W
HT18/ HT19
SO-8
(Top View)
Note HT18, HT19,
Absolute Maximum Ratings those values beyond which damage device occur. Functional operation under these conditions implied. Continuous operation device absolute rating level affect device reliability. voltages referenced device ground. Note Distance 1.6mm from case seconds.
Electrical Characteristics =25°C unless otherwise specified)
Symbol
Parameter
Units
Conditions
VTPG
High voltage positive supply
ITPQ
Input leakage current
ITPG 500µA, HKS, DP/DP open circuit VTPG 100V, HKS, DP/DP open circuit VTPG 290V, HKS, DP/DP open circuit VTPG 17V, ITPG 180mA,
switch resistance
VTPG 3.0V, ITPG 20mA, VTPG 2.3V, ITPG 5mA, VTPG 5.0V, VTPG 10V, REXT VHKS -70V 3.0V, 3.0V
ITPG ILIM IHKS ILS,
Bias current ITPG current limiting input current logic input current output current
HT18/HVT19
Electrical Characteristics
Symbol VIL(HKS) VIH(HKS) VIL(LS), VIL(DP) VIH(LS), VIH(DP) TOFF Parameter input input high Input logic DP/DP Input logic high DP/DP Turn time Turn time VTPG Unit Conditions VTPG 3.0V VTPG 3.0V VTPG 3.0V VTPG 3.0V VTPG 4.5V VTPG 4.5V
Logic Truth Table
high impedance, open circuit don't care logic level logic level high
Switch State
Block Diagram
HT18 HT19
Charge Pump Logic Control
HT18/HT19
Description
Name Description Positive input side telephone line, typically side. Hookswitch input. Connect turn hook switch. Internally pulled with high value resistor. Device ground. Negative side telephone line, typically Ring side. Connect. Open Circuit. internal connections device. Line switch input. Input logic high turns hook switch. Internally pulled with high value resistor. HT18. Dial pulse input. Input logic high turns hook switch. Used pulse dialing. Internally pulled with high value resistor. HT19. Dial pulse input. Input logic turns hook switch. Used pulse dialing. Internally pulled high with high value resistor. Current sense input. external resistor connected between sets current limit. Positive output side telephone line. Zener protection prevent this output from rising above required.
8-Lead SOIC (Narrow Body) Package Outline
4.90 0.10 6.00 0.20 3.90 0.10 Note
View
0.17 0.25 1.75 1.25
PLCS)
0.25 0.50 Note
0.10 0.25 1.27BSC 0.40 1.27
0.31 0.51
Side View
Notes: dimensions millimeters. Angles degrees. corner chamfered, then identifier must located within area indicated.
View
(The package drawing(s) this data sheet reflect most current specifications. latest package outline information
Doc.# DSFP-HT18_HT19 A111006

350V breakdown voltage maximum switch resistance Current limiting prot

Top Searches for this datasheet

Other recent searches