Si5020C-BA
Si5020 M
I C R O
PCB
Features
!
WITH
S3050 F
OOTPRINT
Supports substitution of the
Si5020 in systems designed
for AMCC S3050 footprint
!
Simplifies evaluation of the
Si5020 device
!
DSPLL™ technology eliminates
external loop filter components
!
Excellent jitter generation performance:
3.0 mUIrms (typical)
!
Low power consumption: 108 mA at
OC-48 (typical)
!
Wide supply voltage range: 3 to 6 V
Ordering Information:
See page 11.
Applications
!
Replacement for S3050
!
In-system evaluation of the Si5020 SiPHY
TM
multi-rate SONET/SDH
clock and data recovery IC
Pin Assignments
Si5020C-BA
RATESEL0
VCC
VEE
VEE
26
NC
NC
The Si5020C-BA is a micro printed circuit board (PCB) that allows use of
the Si5020 clock and data recovery (CDR) device in communications
systems originally designed for the AMCC S3050. No system circuit board
changes are necessary because the micro PCB is pin-compatible with the
S3050.
The Si5020 device offers significant advantages in jitter performance,
power dissipation, ease of use, and size over competing CDRs. The
Si5020 incorporates Silicon Laboratories’ DSPLL™ technology for
improved performance and ease of use. DSPLL technology eliminates
external loop filter components and their associated noise entry points,
thus making the Si5020 CDR less susceptible to board-level interaction
and helping to ensure optimal jitter performance.
32
31
29
30
27
28
NC
NC
VCC
VEE
VEE
SERDATIP
SERDATIN
NC
REFCLKP
25
VCC
Description
1
2
3
4
5
6
7
8
24
23
22
21
20
19
18
17
11
10
13
12
14
15
16
RATESEL1
SERCLKOP
SERCLKON
VEE
NC
SERDATOP
SERDATON
NC
9
NC
NC
VCC
REFCLKN
VCC
VEE
VEE
Top View
Functional Block Diagram
RATESEL0
LOCKDET
RATESEL1
RATESEL1
RATESEL0
LOL
SERDATIP
SERDATIN
DIN+
DIN–
Inverter
DOUT+
DOUT–
SERDATOP
SERDATON
PWRDN/CAL
Si5020
CDR
REXT
GND
VDD
REFCLKP
REFCLKN
VCC
IN
GND
POK
OUT
REFCLK+
REFCLK–
CLKOUT+
CLKOUT–
SERCLKOP
SERCLKON
VEE
Regulator
Rev. 1.0 3/04
Copyright © 2004 by Silicon Laboratories
Si5020C-BA-DS10
LOCKDET
Si5020C-BA
T
A B L E
Section
OF
C
O N T E N TS
Page
Si5020C-BA Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Typical Application Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Si5020 CDR Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Voltage Regulator Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Rate Select Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Lock Detect Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Reference Clock Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
High-Speed Serial Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Recovered Data Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Recovered Clock Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Soldering/Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Pin Descriptions: Si5020C-BA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Ordering Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Package Outline: Si5020C-BA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Document Change List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Rev. 1.0
3
U5
VCC
INV
2
A
NC
3
MC74VHC1GT04
GND
Y
1
2
7
11
14
4
5
VDDA
VDDB
VDDC
VDDD
REXT
3
8
18
GNDA
GNDB
GNDC
4
5.0V
5.0V DC
2.5V DC
U3
1
IN
OUT
5
LOCKDET
2
GND
R2
0402 10k (1%)
U1
Si5020C-BA
3
EN
POK
4
MAX8875EUK25
6
C2
0603 0.022uF
SERDATIP
DIN+
DOUT-
DOUT+
13
DIN-
SERDATIN
C1
0805 4.7uF 6.3V
4
REFCLK+
CLKOUT-
CLKOUT+
REFCLK-
16
17
5
10
9
12
SERDATON
SERDATOP
Si5020C-BA Schematic Diagram
RATESEL0
RATESEL1
RATESEL1
RATESEL0
PWRDN/CAL
LOL
20
19
15
Rev. 1.0
REFCLKP
REFCLKN
1
Si5018/20
R1
0402 10k (1%)
SERCLKON
SERCLKOP
System GND
Si5020C-BA
Electrical Specifications
Table 1. Recommended Operating Conditions
Parameter
Ambient Temperature
Si5020C-BA Supply Voltage
2
Symbol
T
A
V
CC
Test Condition
Min
1
–40
3.0
Typ
25
5.0
Max
1
85
6.0
Unit
°C
V
Notes:
1.
All minimum and maximum specifications are guaranteed and apply across the recommended operating conditions.
Typical values apply at nominal supply voltages and an operating temperature of 25°C unless otherwise stated.
2.
The Si5020C-BA specifications are guaranteed when using the recommended application circuit (including component
tolerance) of "Typical Application Schematic" on page 6.
Table 2. DC Characteristics
(V
CC
= 5.0 V ±5%, T
A
= –40 to 85 °C)
Parameter
Supply Current
OC-48
GbE
OC-12
OC-3
Power Dissipation
OC-48
GbE
OC-12
OC-3
Symbol
I
CC
Test Condition
Min
—
—
—
—
—
—
—
—
Typ
108
113
117
124
540
566
586
620
Max
—
—
—
—
—
—
—
—
Unit
mA
mW
Table 3. Absolute Maximum Ratings
Parameter
DC Supply Voltage
LVTTL Input Voltage
Storage Temperature Range
Lead Temperature (soldering 10 s)
ESD HBM Tolerance (100 pf, 1.5 kΩ)
Symbol
V
CC
V
DIG
T
STG
Value
–0.5 to 7.0
–0.3 to 3.6
–55 to 150
300
1
Unit
V
V
°C
°C
kV
Note:
Permanent device damage may occur if the above Absolute Maximum Ratings are exceeded. Functional operation
should be restricted to the conditions as specified in the operational sections of this data sheet. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
Rev. 1.0
5
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