HT0638LG Supertex, HT0638LG Datasheet - Page 3

• Manufacturer Part Number: HT0638LG
• Description: Telecom ICs 375V
• Manufacturer: Supertex
• Type: 18-Line SCSI Terminatorr

Specifications of HT0638LG

• Operating Supply Voltage: 0 V to 7 V
• Mounting Style: SMD/SMT
• Package / Case: SO-8
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Electrical Characteristics
Logic Truth Table
Z = high impedance, open circuit, X = don’t care, L = logic, level low, H = logic level high.
Typical Performance Curve
Pin Description
V
V
V
V
V
V
Sym
T
IH(LS1)
IL(LS1)
T
IH(LS2)
IL(LS2)
IH(DP)
IL(DP)
Pin
OFF
ON
1
2
3
4
5
6
7
8
,
,
L or Z
HKS
Parameter
LS1 and LS2 input low
LS1 and LS2 input high
DP input low
DP input high
Turn on time
Turn off time
X
X
H
X
Name
GND
TPG
HKS
LS2
LS1
CS
DP
TP
Description
Positive input side of a telephone line, typically tip side.
Hookswitch input. Connect HKS to TPG to turn on the electronic switch. Internally pulled low.
Device ground. Negative side of a telephone line, typically ring side.
Line switch 2 input. Positive input turns on the electronic switch. Internally pulled low.
Line switch 1 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.
Positive output side of a telephone line.
L or Z
●
LS1
X
H
X
X
1235 Bordeaux Drive, Sunnyvale, CA 94089
(cont.)
350
300
250
200
150
100
50
0
100
Min
1.0
1.0
0
0
-
-
200
Typ
300
-
-
-
-
-
-
400
Max
I
0.2
0.2
5.0
1.0
1.0
20
LIMIT
R
500
L or Z
SENSE
LS2
vs. R
H
X
X
X
3
600
Units
(Ω)
SENSE
ms
ms
V
V
V
V
700
Conditions
---
---
---
---
V
V
800
TPG
TPG
●
900
Tel: [phone]
= 4.5V
= 4.5V
1000
H or Z
H or Z
H or Z
DP
X
L
●
www.supertex.com
Switch State
OFF
OFF
ON
ON
ON
HT0638