GS1522-CQR(2000) View Datasheet(PDF) - Gennum -> Semtech
Part Name
Description
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GS1522-CQR Datasheet PDF : 20 Pages
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PIN DESCRIPTIONS (Continued)
NUMBER
SYMBOL
58
RSET0
63
A0
64
OSC_VEE
74
VCO
75
VCO
LEVEL
Analog
TTL
Power
Analog
Analog
76
77
78
79
82, 84
85, 87
86
88
89
90
91
92
94
96
PD_VEE
PDSUB_VEE
IJI
PD_VCC
LFS, LFS
PLCAP, PLCAP
DM
DFT_VEE
Power
Power
Analog
Power
Analog
Analog
Power
LFA_VEE
LFA
LBCONT
Power
Analog
Analog
LFA_VCC
Power
VCC3
Power
SYNC_DETECT_DISABLE TTL
103, 104, 105,
DATA_IN[19:0]
TTL
106, 107, 110,
111, 112, 113,
114, 115, 118,
119, 122, 123,
124, 125, 126,
127, 128
TYPE
Input
TEST
Input
Input
Input
Input
Input
Output
Input
Input
Input
Input
Input
Output
Input
Input
Input
Input
Input
DESCRIPTION
Control Signal Input. External resistor is used to set the data
output amplitude for SDO0 and SDO0. Use a ±1% resistor.
Test Signal. Used for manufacturing test purposes only. This pin
must be tied low for normal operation.
Negative Supply. Ground for ring oscillator. This pin must be
floating for normal operation.
Control Signal Input. Input pin is AC coupled to ground using a
50Ω transmission line.
Control Signal Input. Voltage controlled oscillator input. This pin is
connected to the output pin of the GO1515 VCO. This pin must be
connected to the GO1515 VCO output pin via a 50Ω transmission
line.
Negative Supply. Most negative power supply connection. For
phase detector stage.
Guard Ring. Ground guard ring connection to isolate phase
detector in PLL stage.
Status Signal Output. Indicates the amount of excessive jitter on
the incoming SDI and SDI input.
Positive Supply. Most positive power supply connection. For
phase detector stage.
Loop Filter Connections.
Control Signal Input. Phase lock detect time constant capacitor.
Test Signal. Used for manufacturing test only. This pin must be
left floating in normal operation.
Most Negative Power Supply Connection . Enables the jitter
demodulator functionality. This pin should be connected to
ground. If left floating, the DM function is disabled resulting in a
current saving of 340µA.
Negative Supply. Most negative power supply connection. For
loop filter stage.
Control Signal Output. Control voltage for GO1515 VCO.
Control Signal Input. Used to provide electronic control of Loop
Bandwidth.
Positive Supply. Most positive power supply connection. For loop
filter stage.
Positive Supply. Most positive power supply connection. For input
stage.
Control Signal Input. Used to disable the sync detection function.
Logic HIGH disables sync detection. Logic LOW: 000-003 is
mapped into 000 and 3FC-3FF is mapped into 3FF for 8-bit
operation.
Input Data Bus. The device receives a 20 bits data stream running
at 74.25 or 74.25/1.001 MHz from the GS1501 HDTV Formatter or
GS1511 HDTV Formatter. Input data can be in SMPTE292M
scrambled or unscrambled format. DATA_IN[19] is the MSB (pin
103). DATA_IN[0] is the LSB (pin 128).
6
GENNUM CORPORATION
522 - 26 - 00
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