Part Number S3032
Revision 1.0 - January 17, 2000
APPLICATION NOTE
S3032
Board Decoupling Guidelines
SONET/SDH/ATM OC-3/12 Transceiver w/CDR S3032 Example
The S3032 transceiver chip is a fully integrated serialization/deserialization SONET OC-12 (622.08 Mbit/s) and
OC-3 (155.52 Mbit/s) interface device. Figure 1 illustrates the connections for the S3032 device. External capaci-
tors are required for power supply decoupling only. Inductors are Murrata BLM31B601SPB or BLM11B601SPB
surface mount ferrites. The double capacitors shown are parallel 0.1 mF X7R and 100 pF are COG or NPO ceramic
chip. The CAP1/CAP2 capacitor should be 0.01 mF X7R. Note that 100 pF should be placed on the top side of the
board near the decoupled pin, and the 0.1 mF should be placed on the bottom side of the board for better capacitor
efficiency. The Low ESR 10 mF capacitors and 0 W resistors are optional for AVCC, for higher noise environments.
Figure 1. S3032 Connections
0.1 mF
100
pF
TTLVCC 48
0.1 mF
1
2
3
PCLKGND
47
TXCOREGND
TXCOREVCC
TTLVCC 46
0.1 mF
0.1 mF
45
44
43
4
5
6
7
S3032
Pinout
(Optional)
0 W
L
42
TTLGND
AVCC1
AGND1
CAP2
100 pF
10 mF
41
40
(Optional)
8
9
Top View
64 pin PQFP
0.01 mF
39
10
11
CAP1
0.1 mF
TTLVCC 38
AGND0
0.1 mF
37
36
35
12 AVCC0
100 pF
13
14
TXOUTVCC
100
pF
0.1 mF
TTLGND
34
33
15
16
100 pF
100 pF
0.1 mF
100 pF
0.1 mF
L
0.1 mF
10 mF (Optional)
0 W (Optional)
1