gs9015a Gennum Corporation, gs9015a Datasheet - Page 5

• Manufacturer Part Number: gs9015a
• Description: Serial Digital Reclocker Corporation
• Manufacturer: Gennum Corporation

INPUT / OUTPUT CIRCUITS
GS9015A PIN DESCRIPTIONS cont.
PIN NO
18
19
20,21
22,23
24,25
26
27
28
V
SCO/SCO Outputs
SYMBOL
CD
SS0, SS1 Inputs
SDO/SDO Outputs
V
V
V
CC2
CC3
EE2
EE1
Output
TYPE
Pin 5
Pin 6
DDI
DDI
Standard Select Inputs. TTL inputs to the 2:4 multiplexer used to select one of four VCO centre
frequency setting resistors (R
When SS0 is HIGH and SS1 is LOW, R
is selected and when both SS0 and SS1 are HIGH, R
low AC impedance (e.g. 1nF to AC Gnd)
Serial Clock Outputs (inverse and true). Pseudo-ECL differential outputs of the extracted serial clock.
These outputs require a 390
These outputs require a 390
Power Supply. Most positive power supply connection. (ECL Outputs).
Power Supply. Most negative power supply connection. (Phase Detector, Carrier Detect)
Power Supply. Most negative power supply connection.
Power Supply. Most positive power supply connection. (VCO, MUX, Standard Select).
Carrier Detect. Open collector output which goes HIGH when a signal is present at either the Serial
Data inputs or the Direct Digital inputs. This output is used in conjunction with the GS9000B or GS9000S
in the Automatic Standards Select Mode to disable the 2 bit standard select counter. This pin should
see a low AC impedance (e.g. 1nF to AC Gnd)
Serial Data Outputs (inverse and true). Pseudo-ECL differential outputs of the regenerated serial data.
2k
1k
Fig. 3 Pins 1, 5 and 6
VCO0
pull-down resistors to V
pull-down resistors to V
380µA
5
- R
VCO3
VCO1
V
DESCRIPTION
CC
+
). When both SS0 and SS1 are LOW, R
-
is selected. When SS0 is LOW and SS1 is HIGH, R
1k
2k
1.2V
+
-
1.6V
VCO3
EE
EE
.
.
is selected. These pins should see a
VCO0
is selected.
520 - 99 - 05
VCO2