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參數(shù)資料
| 型號： | HT19LG |
| 廠商： | SUPERTEX INC |
| 元件分類： | 路由/交換 |
| 英文描述： | Electronic Telephone Line Switch |
| 中文描述： | TELECOM, DIGITAL TIME SWITCH, PDSO8 |
| 封裝： | SOP-8 |
| 文件頁數(shù)： | 1/3頁 |
| 文件大?。?/td> | 76K |
| 代理商： | HT19LG |
HT18
HT19
Electronic Telephone Line Switch
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).
Features
350V breakdown voltage
18
maximum switch resistance
Current limiting protection
Operates at 2.0V input
Applications
Telephone handsets
Modems
Fax machines
Answering machines
Remote meter reading
Phone interface products
Absolute Maximum Ratings
V
TPG
, Input line voltage
V
TP
, Output line voltage
DP/DP continuous input voltage
+350V
+18V
+10V
Storage temperature
–65
°
C to +150
°
C
Junction temperature
+150
°
C
Soldering temperature*
+300
°
C
Power dissipation
0.8 Watt
Notes: All voltages are referenced to ground.
*Distance of 1.6mm from case for 10 seconds.
1
2
3
4
8
7
6
5
Pin Configuration
TPG
TP
HKS
CS
GND
DP/DP *
N/C
LS
Note
: See Package Outline section for dimensions.
top view
SO-8
Package Option
Dial Pulse Pin
DP/DP
SO-8
Breakdown Voltage
Switch Resistance
350V
18
Active High
HT18LG
350V
18
Active Low
HT19LG
Ordering Information
*
For HT18, Pin 6 is DP.
For HT19, Pin 6 is DP.
12/13/01
Supertex Inc. does not recommend the use of its products in life support applications and will not knowingly sell its products for use in such applications unless it receives an adequate "products liability
indemnification insurance agreement." Supertex does not assume responsibility for use of devices described and limits its liability to the replacement of devices determined to be defective due to
workmanship. No responsibility is assumed for possible omissions or inaccuracies. Circuitry and specifications are subject to change without notice. For the latest product specifications, refer to the
Supertex website: http://www.supertex.com. For complete liability information on all Supertex products, refer to the most current databook or to the Legal/Disclaimer page on the Supertex website.
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