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PM73487 Datasheet(PDF) 96 Page - PMC-Sierra, Inc

Part # PM73487
Description  622 Mbps ATM Traffic Management Device
PDF  251 Pages
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Manufacturer  PMC [PMC-Sierra, Inc]
Direct Link  http://www.pmc-sierra.com
Logo PMC - PMC-Sierra, Inc

PM73487 Datasheet(HTML) 96 Page - PMC-Sierra, Inc

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PM73487 QRT
PMC-Sierra, Inc.
PMC-980618
Issue 3
622 Mbps ATM Traffic Management Device
Released
Datasheet
84
Figure 57 shows the AL RAM write timing.
Symbol
Parameter
Signals
Min
Max
Units
Tcyc
Clock period
ALRAM_CLK
10
ns
Tch
Clock high period
ALRAM_CLK
3
ns
Tcl
Clock low period
ALRAM_CLK
3
ns
Tadrsu
Address setup time
ALRAM_ADD(18:0),
ALRAMADD17N,
ALRAMADD18N
2.7
ns
Tadrh
Address hold time
ALRAM_ADD(18:0),
ALRAMADD17N,
ALRAMADD18N
1.5
ns
Toesu
Output enable setup time
/ALRAM_OE
3.5
ns
Toeh
Output enable hold time
/ALRAM_OE
-1
ns
Tadss
Address strobe setup time
/ALRAM_ADSC
2.8
ns
Tadh
Address strobe hold time
/ALRAM_ADSC
1.5
ns
Trds
(Read) Data valid required before clock
ALRAM_DATA(16:0)
3.8
ns
Trdh
(Read) Data valid required after clock
ALRAM_DATA(16:0)
1.5
ns
Twesu
Write enable setup time
/ALRAM_WE
2.9
ns
Tweh
Write enable hold time
/ALRAM_WE
1.2
ns
Figure 57. Address Lookup RAM Write Timing
1
2
3
4
5
Tcyc
Tcyc
Tch
Tcl
Tch
Tcl
Tadss
Tadh
Toesu
Toeh
Tadrsu
Tadrh
Tadrsu
Tadrh
Tadrsu
Tadrh
Twesu
Tweh
Tds
Tdh
VALID DATA
ALRAM WRITE CYCLE
ALRAM_CLK
ALRAM_ADSC
/ALRAM_OE
ALRAM_ADD(18:0)
ALRAMADD17N
ALRAMADD18N
ALRAM_WE
ALRAM_DATA(16:0)



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