GS2965 Datasheet, PDF (6/41 Pages) Gennum Corporation – Uses standard 27MHz crystal

1.2 Pin Descriptions
Table 1-1: GS2965 Pin Descriptions
Pin Number
1
Name
LF+
Type
Passive
2
CP_CAP
Power
3, 5
DDI0, DDI0
Input
4
HIF
Logic Input
6, 7
DDI1, DDI1
Input
8
RSVD
Reserved
9
VCC_VCO
Power
10
11
12
13
14
15
16
17, 18
19
20
21, 22
23
24
VEE_VCO
VDD_1P8
LOCKED
LOS
VDD_DIG
VSS_DIG
SD/HD
DDO1/RCO,
DDO1/RCO
VCC_DDO1
VEE_DDO1
DDO0, DDO0
VCC_DDO0
VEE_DDO0
Power
Power
Output
Output
Power
Power
Output
Output
Power
Power
Output
Power
Power
25
XTAL+
Output
26
XTAL-
Input
Description
Loop Filter capacitor connection. (CLF = 47nF). Connect as shown in Typical
Application Circuit on page 37.
External capacitor for internal LDO regulator supplying the charge pump
circuit.
Serial Digital Differential Input 0.
Host interface selection pin. Active-low input. See Section 4.15.1.
Serial Digital Differential Input 1.
Reserved pin. Do not connect to this pin.
Most positive power supply connection for the internal
VCO section. Connect to a 3.3V supply with a 422Ω resistor, or a 2.5V
supply with a 267Ω resistor.
Most negative power supply connection for the internal
VCO section. Connect to GND.
External capacitor for internal 1.8V digital supply.
Lock Detect status signal. HIGH when the PLL is locked.
Loss Of Signal status. HIGH when the input signal is invalid.
Most positive power supply connection for the digital core.
Connect to 3.3V or 2.5V.
Most negative power supply for the digital core.
Connect to GND.
This signal will be LOW for all rates other than 270Mb/s.
This signal is HIGH for 270Mb/s.
Differential serial clock or data outputs.
Most positive power supply connection for the DDO1/DDO1 output driver.
Connect to 3.3V or 2.5V.
Most negative power supply connection for the DDO1/DDO1 output
driver. Connect to GND.
Differential Serial Digital Outputs.
Most positive power supply connection for the DDO0/DDO0 output driver.
Connect to 3.3V or 2.5V.
Most negative power supply connection for the DDO0/DDO0 output
driver.
Connect to GND.
Reference crystal output.
Reference crystal input.
GS2965 Multi-Rate SDI Reclocker with Equalization &
De-emphasis
Data Sheet
52462 - 4
July 2012
6 of 41
Proprietary & Confidential