GS1535 查看數據表（PDF） - Gennum -> Semtech
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GS1535 Datasheet PDF : 22 Pages
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GS1535 Data Sheet
Table 1-1: Pin Descriptions (Continued)
Pin
Number
Name
Type
Description
24, 25, 26
SS[2:0]
BIDIRECTIONAL
When AUTO/MAN is HIGH, SS[0:2] are outputs, displaying the data rate to
which the PLL has locked.
When AUTO/MAN is LOW, SS[0:2] are inputs, forcing the PLL to lock only to a
selected data rate.
SS2
SS1
SS0
DATA RATE
SELECTED/FORCED (Mb/s)
0
0
0
143
0
0
1
177
0
1
0
270
0
1
1
360
1
0
0
540
1
0
1
1483.5/1485
27
28
29
33
34
36
44, 46
45
50, 51
52, 53
62, 63
4, 8, 12,16,
32, 35, 37,
43, 49, 54, 64
43
ASI/177
LD
RSVD
SD/HD
KBB
DDO_MUTE
DDO, DDO
DDO_VTT
XTAL_OUT+,
XTAL_OUT-
XTAL+, XTAL-
LF+, LF-
GND
GND_DRV
LOGIC INPUT
OUTPUT
RESERVED
OUTPUT
ANALOG INPUT
LOGIC INPUT
OUTPUT
PASSIVE
OUTPUT
Disables 177Mbps data rate in the AUTO data rate detection circuit. This
prevents a FALSE LOCK to 177Mbps when using DVB/ASI.
LOCK DETECT. HIGH when the PLL is locked.
DO NOT CONNECT.
This signal is LOW when the reclocker has locked to 1.485Gbps or
1.485/1.001Gbps, and HIGH when the reclocker has locked to 143Mbps,
177Mbps, 270Mbps, 360Mbps, or 540Mbps.
Controls the loop bandwidth of the PLL. Leave this pin floating for serial
reclocking applications.
Mutes the DDO/DDO outputs, when not in bypass mode.
Differential Serial Digital Outputs.
Center tap of two 50Ω on-chip termination resistors between DDO and DDO..
Differential buffered outputs of the reference oscillator.
INPUT
PASSIVE
PASSIVE
Reference crystal input. Connect to the GO1535.
Loop filter capacitor connection. (CLF = 47nF).
Recommended connect to GND.
PASSIVE
Recommended connect to GND.
18557 - 8 February 2005
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