product brief www.semtech.com monolithics 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: 2 7 -1 or 2 31 -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 optical transport & datacom products si err a
product brief SMI4028-pb www.semtech.com monolithics 16: 1 d e s k e w txdata [ 15] p / n txdscp / n txdata [ 14] p / n txdata [ 1 ] p / n txdata [ 0 ] p / n reset _ n deskew _ en txdataout [ 1 ] c 2 txcksrcp / n refpll p / n phserr _ dnp / n 17 channel dll array hsclk [ 0 ] p / n txrefclkp / n txmclkp / n txm clk _ en - 1 . 6 v regulator phserr _ en frame _ epoch hsclk [ 1 ] p / n phserr _ upp / n txdckp / n sfi - 5 transmit controller v e e _ v c o v c c _ v c o v d d _ s f i 5 v c c v e e v d d d i g i t a l ptat temp . sensor c 1 r txdataout [ 0 ] prbs error checker d q p s k p r e c o d e r precoder _ en clock multiplier unit ( cmu ) ? ? hsclk 0 _ ph [ 7 : 0 ] dac hsclk 0 _ en txooa cmu _ lock frame _ lock tx _ temp r e f n 1 6 _ o u t x 4 pll dllclk _ sel frame _ epoch _ en wrclk _ 15 wrclk _ 0 . . . . . . 1 , ? ? hsclk 1 _ ph [ 7 : 0 ] dac 2 : 1 phase detect refsel 2 : 1 deskew correlator prbs pattern 2 7 / 2 31 - 1 . 6 v reference r e f n 1 6 _ i n frame header acquistion m u x ? txdata 1 _ ph [ 7 : 0 ] dac txdata 1 _ lvl [ 7 : 0 ] 17 xn channel fifo array txdata _ sel [ 1 : 0 ] 1 , ? hsclk 0 _ fsel dac txdata 0 _ ph [ 7 : 0 ] dac txdata 0 _ lvl [ 7 : 0 ] dac hsclk 1 _ fsel data _ 15 data _ 0 sfi - 5 block prbs block mux block c m u b l o c k r e f s e l e c t b l o c k adc temp data select fixed data dac hsclk 0 _ lvl [ 7 : 0 ] hsclk 1 _ en dac hsclk 1 _ lvl [ 7 : 0 ] txdata 1 _ en txdata 0 _ en s p i _ e n _ n s p i _ c l k s p i _ d i n s p i _ d o u t spi subsystem c o n t r o l d a c s c o n t r o l l o g i c s t a t u s txlf _ p txlf _ n diode temp . sensor gtemp _ p gtemp _ n resn resp 1 . 0 k bias current control select resistor v d d c o n t r o l v e e d i g i t a l v c c d i g i t a l sfi 5 compatabile i / o gnd referenced cml interface definitions ac coupled cml lvcmos ( 1 . 2 , 1 . 8 v ) SMI4028 block diagram 16:2 multiplexer/cmu with dqpsk precoder sierra monolithics inc. is now part of semtech incorporated. to view the most current product specifcations and datasheets, contact your local semtech field applications engineer. si err a
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