VSC7959
Data Sheet
CZ1
CZ2
1
2
3
4
5
6
7
8
NC
16
15
14
13
12
11
10
9
SQUELCH
VCC
GND
IN+
OUT+
OUT-
VCC
VSC7959
Top View
IN-
GND
LEVEL
TH
LOS
LOS
Figure 4. Pin Diagram for TSSOP-16 (YD)
Table 8: Pin Identifications for TSSOP-16 (YD)
Pin Name
Pin Number
Description
CZ1
1
Offset Correction Loop Capacitor. Place capacitor between this pin and CZ2 to alter time constant
of offset correction loop.
CZ2
2
Offset Correction Loop Capacitor. Place capacitor between this pin and CZ1 to alter time constant
of offset correction loop.
GND
IN+
3
4
5
6
7
Supply Ground
Noninverted Input Signal
Inverted Input Signal
Supply Ground
IN-
GND
LEVEL
Output Current Level. This pin may be either connected to ground or left unconnected. Connecting
to ground causes output current to be 20mA. The output is 16mA when left unconnected.
TH
8
9
Loss of Signal (LOS) Threshold. Connect a resistor from this pin to ground to set the input signal
level at which LOS outputs will be asserted.
LOS
LOS
Inverted Loss of Signal Output. LOS is HIGH for input signals above the threshold programmed by
TH.
10
Noninverted Loss of Signal Output. LOS is LOW for input signals above the threshold programmed
by TH.
VCC
11
12
13
14
15
Power Supply
OUT-
Inverted Data Output
Noninverted Data Output
Power Supply
OUT+
VCC
SQUELCH
Squelch Input. Squelch is disabled if this pin is unconnected or set LOW. When SQUELCH is
HIGH, OUT+ and OUT- are forced to static levels when LOS is HIGH.
NC
16
No Connection
10 of 14
G52358, Rev 4.0
2/10/03
VITESSE [ VITESSE SEMICONDUCTOR CORPORATION ]
