SMI4028 Datasheet, PDF (1/2 Pages) Semtech Corporation – 45 to 49 Gbps 16:2 Multiplexer/CMU with DQPSK Precoder

Product Brief
OPTICAL TRANSPORT & DATACOM PRODUCTS
SMI4028
45 to 49 Gbps 16:2 Multiplexer/CMU with DQPSK Precoder
Product Description
SMI4028 is a 16:2 Multiplexer with on chip Clock
Multiplier Unit and DQPSK Precoder that support the
data rate from 45 to 49Gbps.
Product Highlights
4 User-Enabled DQPSK Precoder Function
4 SFI-5+Compliant FIFO and Deskew functions
4 Dual Ground-Referenced High-Speed Single-Ended
Output Ports
 0.3 to 0.7 Volt pp SE Output Level
(adjustable for reduced power)
 14 psec (typical) Rise/Fall Times
 4.8 psec p-p total jitter (typical)
 1.0 psec (rms) total jitter
 Data-to-Data Skew Adjustments for Each Output
Data Lane; +/- 0.25UI
 GPPO Connection; 22.5 to 24.5 Gbaud (f_Baud)
4 High-Speed Differential Clock Outputs with Highly
Stable Clock-Data Skew and Low Phase Noise
 Full (23.5 nominal) and Half-Rate
(11.75 GHz nominal) CML Clocks
 Skew control of +/- 0.5UI
on Half-Rate Clock
 0.8 Volt pp Differential Output Level
4 SONET-compliant Clock Multiplier Unit (CMU) with VCO
4 User Selectable Reference Clock Input Ports
4 Reference Clock Clean-Up Loop Circuitry
4 On-Chip PRWS Error Checker and Pattern Generator:
2⁷-1 or 2³¹-1 industry-standard patterns
 On-chip error counter for measuring BER
 Lane-by-lane error checking
4 SPI Control Interface Supports 1.2V or 1.8V LVCMOS
4 Temperature Sense Output Voltage
4 Dual-Power Supply Voltages: +1.2 or +1.8V
and -2.8V
4 Low Power Consumption: 2.9 Watts (typical)
Applications
4 OC768/OTU3 Modules and Transponders
4 MSPP, ADM and Cross-connects
4 IP Routers and Switches
SIERRA
MONOLITHICS
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