GS2975A Datasheet, PDF (6/27 Pages) Gennum Corporation – HD-LINX® III Multi-Rate SDI Automatic Reclocker with Dual Differential Outputs

Table 1-1: Pin Descriptions (Continued)
Pin Number Name
24, 25, 26
SS[0:2]
27
NC
28
LOCKED
29
LOS
30
VCC_DIG
31
VEE_DIG
33
SD/HD
34
KBB
35
RCO_MUTE
Type
Bi-directional
No Connect
Output
Output
Power
Power
Output
Analog Input
Power
Description
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
1
0
270
1
0
1
1483.5/1485
1
1
0
2967/2970
Not connected internally.
Lock Detect.
This pin is set HIGH by the device when the PLL is locked.
Loss of Signal.
Set HIGH when there are no transitions on the active DDI[3:0] input.
Most positive power supply connection for the internal glue logic.
Connect to 3.3V.
Most negative power supply connection for the internal glue logic.
Connect to GND.
This signal will be set LOW by the device when the reclocker has locked to
2.97Gb/s (2.967Gb/s) or 1.485Gb/s (1.4835Gb/s), or when a non-SMPTE
standard is applied (i.e. the device is not locked).
It will be set HIGH when the reclocker has locked to 270Mbps.
Controls the loop bandwidth of the PLL.
Serial clock or secondary data output mute.
Assert LOW for reduced power consumption, see 2.2 DC Electrical
Characteristics.
When RCO_MUTE = LOW, the RCO/DDO1 output is powered down.
When RCO_MUTE = HIGH, the RCO/DDO1 output is active.
NOTE: This is not a logic input pin.
GS2975A HD-LINX® III Multi-Rate SDI Automatic
Reclocker with Dual Differential Outputs
Data Sheet
41487 - 4
April 2009
6 of 27