Revision A – Data Sheet Subject to Change without Notice
SiI2020A SerDes
Data Sheet March 2002
General Description Features
Silicon Image’s SiI2020A is a serializer/deserializer
(SerDes) capable of transmitting and receiving data at
1.0625 and 2.125 gigabits-per-second (Gbps) targeting Fibre
Channel applications. Designed for power, performance
and price, the SiI 2020A SerDes makes use of a robust,
low-power, low-cost, low-jitter, single-PLL CMOS design
that comes in compact 64-pin, 14 mm MQFP and 10 mm
TQFP packages. The SiI2020A supports selectable
transmit and receive data rates for automatic speed
negotiation and a narrow 10-bit SSTL_2-compatible interface
for parallel data input/output. The innovative digital, fast-
locking, single-PLL design enables high data reliability and
ease-of-design while eliminating the need for external PLL
capacitors and multiple PLLs.
The SiI2020A leverages much of the circuit innovation at the
physical layer of Silicon Image’s proprietary reduced
overhead Multi-layer Serial Link (MSLTM) architecture, which
was pioneered and proven with our market-leading
PanelLink products. Silicon Image has shipped over 20
million units of PanelLink products for host systems and
displays in the PC and the CE markets, notable for their
noisy operating conditions. The MSL technology is a multi-
layered approach to providing cost-effective, multi-gigabit
semiconductor solutions on a single chip for high-bandwidth
applications.
SiI 2020A Pin Diagram
SiI2020A
64-pin
MQFP/TQFP
(Top View)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49505152535455565758596064 63 62 61
VREFT
TX[0]
TX[1]
TX[2]
TBC
TX[3]
TX[4]
TX[8]
TX[5]
TX[6]
NC
TX[9]
TX_RATE
RX[0]
VDD_TX
VDD_TX
VDD_TX
RX+
VDD_RX
GND
NC
VDDP
EWRAP
VDDQ
GND
REFCLK[1]
REFCLK[0]
VDD
RX[1]
RX[2]
RX[3]
RX[4]
RX[5]
RX[6]
RX[7]
VDD_SSTL
RX[8]
RX[9]
GND
TX+
VDD
EQ
VDD_SSTL
GND
EN_CDET
GND
RXZ_CNT
RBC[1]
VDD_SSTL
REF_RATE
GND
RX_LOS
COM_DET
PLLBW
GND
GND
TX-
RX_RATE
RX-
TX[7]
RBC[0]
RBC_SYNC
VREFR
GND
General
• Fibre Channel-compliant
• Multi-rate: 1.0625 Gbps and 2.125 Gbps
Low Power
• Single 2.5V supply for core circuits and high-speed
I/O
• Power dissipation at 2.125 Gbps: 425mW (typical),
665mW (maximum)
Cost Effective
• Standard CMOS technology
• Compact 64-pin, 14 x 14mm MQFP package
• Compact 64-pin, 10 x 10mm TQFP package
Narrow parallel I/O Interface
• 10-bit interface with DDR for 2.125 Gbps mode
• SSTL_2 and High-Speed Parallel Interface (HSPI)-
compliant
• Separate transmit byte clock (TBC) for latching
parallel input data
Highly Reliable Serial Interface
• Separately selectable Tx and Rx data rates
• Single, digital PLL architecture
• Very-low-jitter PLL: 2.7 ps (random jitter), 24.6 ps
(deterministic jitter)
• Adjustable PLL filter bandwidth
• Variable pre-emphasis control
• Variable on-chip termination resistor
• Full ESD tolerance to 2kV
Proven Technology
• MSL-based technology proven with PanelLink
ICs for the PC and the CE markets (2-5 Gbps, over
20M units shipped)
• Robust design for “noisy” environments
Figure 1. SiI2020A Pin Diagram