HT0638 Supertex, Inc., HT0638 Datasheet - Page 4

• Manufacturer Part Number: HT0638
• Description: Electronic Line Switch
• Manufacturer: Supertex, Inc.

Pin Description
8-Lead SOIC (Narrow Body) LG Package Outline
(The package drawing(s) in this data sheet may not refl ect the most current specifi cations. For the latest package outline
information go to http://www.supertex.com/packaging.html.)
Doc.# DSFP-HT0638
NR111006
Pin
1
2
3
4
5
6
7
8
Name
GND
TPG
HKS
LS1
LS2
CS
TP
DP
6.00 ± 0.20
1.75 MAX
0.10 - 0.25
Description
Positive input side of a telephone line, typically Tip side.
Positive output side of a telephone line.
Hookswitch input. Connect HKS to TPG to turn on the electronic switch. Internally pulled low.
Line switch 1 input. Positive input turns on the electronic switch. Internally pulled low.
Line switch 2 input. Positive input turns on the electronic switch. Internally pulled low.
Dial pulse input. A low input turns off the electronic switch. Use for pulse dialing. Internally
pulled high.
Current sense input. An external resistor connected between CS and TP sets the current limit.
Short CS to TP if current limiting is not used.
Device ground. Negative side of a telephone line, typically Ring side.
3.90 ± 0.10
Notes:
1
8
1. All dimensions in millimeters. Angles in degrees.
2. If the corner is not chamfered, then a Pin 1 identifier
1.27BSC
must be located within the area indicated.
Side View
Top View
4.90 ± 0.10
Note 2
0.31 - 0.51
1.25 MIN
4
0.17 - 0.25
(4 PLCS)
5° - 15°
0.40 - 1.27
End View
45°
0° - 8°
0.25 - 0.50
Note 2
HT0638