GS9015B Datasheet, PDF (9/13 Pages) Gennum Corporation – GENLINX-TM GS9015B Serial Digital Reclocker

+5V _0.1µ
390
4 3 2 1 28 27 26
390
+5V
0.1µ
ECL DATA
INPUTS
5 _DDI
6 _DDI
7
VCC1
8 _VEE1
GS9015B
25
SDO
24
SDO
SCO ²³
SCO ²²
SS1 ^{21 +5V}
100
DATA
100
DATA
100
CLOCK
100
CLOCK
390
DED _+5V
EN ^NS _÷2
OMM ^{ESIG ÷1}
9 VEE1
10 _ƒ/2
11 _VEE3
SS0 ²⁰
CD ¹⁹
12 13 14 15 16 17 18
+5V
390
10k
0.1µ
5.6p
910
10n
STAR
ROUTED
LOOP
VOLTAGE
TEST
POINT
See Figure 15
CARRIER
DETECT
OUTPUT
C ^D _{All resistors in ohms, all capacitors in microfarads unless otherwise stated.}
RE ^{W Fig. 12 GS9015BTypical Test Circuit Using +5V Supply}
E _{TEST SETUP}
T _{N Figure 12 shows a typical circuit for the GS9015B using a +5}
O ^{volt supply. Figure 13 shows the GS9015B connections}
when using a -5 volt supply.
N ^R _{The 0.1µF decoupling capacitors must be placed as close as}
O possible to the corresponding VCC pins.
F ^{The layout of the loop filter and RVCO components requires}
The Carrier Detect is an open-collector active high output
requiring a pull-up resistor of approximately 10 kΩ.
The SS0, SS1, and CD pins should see a low AC impedance.
This is particularly important when driving the SS0, SS1 pins
with external logic. The use of 1nF decoupling capacitors at
these pins ensures this.
careful attention. This has been detailed in an application
note entitled "Optimizing Circuit and Layout Design of the
GS9005A/15A", Document No. 521 - 32 - 00.
The loop voltage can be conveniently measured across the
10 nF capacitor in the loop filter. Tuning procedures are
described in the Temperature Compensation Section (page
11). The fixed value frequency setting resistors should be
placed close to the corresponding pins on the GS9015B.
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