GS2975A GENNUM [Gennum Corporation], GS2975A Datasheet - Page 5

• Manufacturer Part Number: GS2975A
• Manufacturer: GENNUM [Gennum Corporation]

1.2 GS2975A Pin Descriptions
Table 1-1: Pin Descriptions
GS2975A HD-LINX® III Multi-Rate SDI Automatic
Reclocker with Dual Differential Outputs
Data Sheet
41487 - 4
4, 8, 12,16, 32,
Pin Number
43, 49
13, 15
17, 18
9, 11
1, 3
5, 7
10
14
19
20
21
22
23
2
6
April 2009
Name
DDI0, DDI0
DDI0_VTT
GND
DDI1,DDI1
DDI1_VTT
DDI2, DDI2
DDI2_VTT
DDI3, DDI3
DDI3_VTT
DDI_SEL[1:0]
BYPASS
AUTOBYPASS
AUTO/MAN
VCC_VCO
VEE_VCO
Type
Input
Passive
Passive
Input
Passive
Input
Passive
Input
Passive
Logic Input
Logic Input
Logic Input
Logic Input
Power
Power
DDI_SEL1
Description
Serial digital differential input 0.
Center tap of two 50Ω on-chip termination resistors between DDI0 and
DDI0.
Recommended connect to GND.
Serial digital differential input 1.
Center tap of two 50Ω on-chip termination resistors between DDI1 and
DDI1.
Serial digital differential input 2.
Center tap of two 50Ω on-chip termination resistors between DDI2 and
DDI2.
Serial digital differential input 3.
Center tap of two 50Ω on-chip termination resistors between DDI3 and
DDI3.
Serial digital input select.
Bypass the reclocker stage.
When BYPASS is HIGH, it overwrites the AUTOBYPASS setting.
Automatically bypasses the reclocker stage when the PLL is not locked
This pin is ignored when BYPASS is HIGH.
Auto/Manual select.
When set HIGH, the standard is automatically detected from the input data
rate. When set LOW, the user must program the input standard using the
SS[2:0] pins.
Most positive power supply connection for the internal VCO section.
Connect to 3.3V.
Most negative power supply connection for the internal VCO section.
Connect to GND.
0
0
1
1
DDI_SEL0
0
1
0
1
INPUT SELECTED
DDI0
DDI1
DDI2
DDI3
5 of 27