Product Brief
OPTICAL
TRANSPORT
&
DATACOM
PRODUCTS
SMI4038
45 to 49 Gbps 2:16 DQPSK CDR/Demultiplexer
Product Description
SMI4038 accepts single-ended 45 to 49 Gbps NRZ
serial data streams and demultiplexes the data into
sixteen parallel output channels consistent with the
SFI-5 standard.
4
4
4
4
4
User-Selectable Reference Clock Inputs
SPI Control Interfaces Supports 1.2V or 1.8V LVCMOS
Temperature Sense Output Voltage
Power Supplies: 1.2 to 1.8V, and -2.8V (V
ee
)
Low Power Consumption: 3.1 Watts (typical)
Product Highlights
4
2:16 CDR/Demultiplexer with Integrated DQPSK
Decoder Function
4
Dual Ground-Referenced Serial Input Ports operating
at rates from 22.5 to 24.5 Gbaud
4
Ground-Referenced Serial Input Ports
4
SFI-5+ Compatible Data and Clock Interfaces
4
Dual On-Chip Clock and Data Recovery Units (CDR’s)
with Full-Rate Recovered Clock Output
4
CDR Lock Status Indicators
4
On-Chip PRBS Error Checker and Pattern Generator:
2
7
-1 or 2
31
-1 Industry-Standard Patterns
4
100 mVp-p Input Sensitivity
4
Adjustable Input Threshold and Sample Clock Phase
for each input channel
Applications
4
OC768/OTU3 Modules and Transponders
4
MSPP ADM and Cross-connects
,
4
IP Routers and Switches
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Product Brief
SMI4038 Block Diagram — 45 to 49 Gbps 2:16 DQPSK CDR/Demultiplexer
RXLOS[1]
RXLOS[0]
RXS_SEL [1:0]
Detector & Status
Status
Control
Logic
RXS
RESP
Bias Current
Control
Select Resistor
EXTLOS
SEL
EXTLOS
RESN
1.0 K
OR
CDR_LOCK_ERR[1]
CDR_LOCK_ERR[0]
RXLF_P[1]
C1
C2
R
>
PEAKDET 1[7:0]
>
LOS_TH[7:0]
PEAKDET 0[7:0
]
CDRLOCK_ERR_OR
Diode Temp.
Sensor
GTEMP_P
GTEMP_N
ADC
ADC
PRBS Block
PRBS
Error
Checker
SFI-5 Block
Frame
Generator
RXDATA_EN
RXLF_N[1]
RCLK[1]P/N
RXDSCP/N
RCLK1_EN
PH_ADJ1[4:0]
DAC
RXDATAIN _DELAY 1[5:0]
Data Select
Line Side Deskew
RXDATAIN[1]P/N
+
DAC
TH_ADJ1[7:0]
TH_ADJ0[7:0]
DAC
DQPSK
Decoder
Peak
Det
Peak
Det
CDR
.
.
.
RXDATA[15] P/N
.
RXDATA[0] P/N
.
.
DECODER_EN
RXDATAIN[0]P/N
RCLK[0]P/N
+
PH_ADJ0[4:0]
CDR
Fixed
Data
PRBS
Pattern
2
7
/2
31
RXDCK_EN
RXDCKP/N
TXDATA_
SEL[1:0]
SWAP_01
RXLF_P[0]
C1
C2
R
RCLK0_EN
RXDATAIN_DELAY0[5:0]
INVERT[1:0]
DAC
CDR Block
Data Control
FRAME_EPOCH
RESET_N
Level
Shift
RXCKSRCP/N
RXLF_N[0]
RXREFCK P/N
Status
RX_TEMP
PTAT Temp.
Sensor
ADC
TEMP
SPI Subsystem
-1.6V
Regulator
-1.6V
Reference
Control DACs
Control logic
RXCLKSRC_EN
RXMCLKP/N
RXMCLK_EN
VEE_VCO_0
VCC_VCO_0
VEE_VCO_1
VCC_VCO_1
REFN16_IN
REFN16_OUT
VCC_Digital
VDD_Digital
VEE_Digital
SPI_EN_N
SPI_CLK
SPI_DIN
SPI_DOUT
VDD_SFI5
VEE
VCC
VDD_Control
Interface Definitions
SFI5 compatabile I/O
GND referenced CML
AC coupled CML
LVCMOS (1.2, 1.8V)
Sierra Monolithics Inc. is now part of Semtech Incorporated. To view the most current product specifications and datasheets, contact your local Semtech Field Applications Engineer.
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SMI4038-PB
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