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PM73487 Datasheet(PDF) 89 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) 89 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
77
6
TIMING DIAGRAMS
All pin names are described in section 4 “Pin Descriptions” starting on page 55. Unless otherwise
indicated, all output timing delays assume a capacitive loading of 30 pF
6.1
UTOPIA Timing
Figure 50 shows the receive UTOPIA 50 MHz timing (the RATM_ADD and RATM_CLAV val-
ues are shown in hexadecimal).
Figure 50. Receive UTOPIA 50 MHz Timing
Symbol
Parameter
Signals
Min
Max
Unit
ATM_CLK frequency
ATM_CLK
55
MHz
ATM_CLK duty cycle
ATM_CLK
40
60
%
TraddQ
Clock-to-output valid time
RATM_ADD(4:0)
3.4
10.5
ns
Trclavsu
Input setup time
RATM_CLAV(3:0)
4
ns
Trclavh
Input hold time
RATM_CLAV(3:0)
1
ns
TrenQ
Clock-to-output valid time
/RATM_READ_EN
3.5
9.5
ns
Trsocsu
Input setup time
RATM_SOC
4
ns
Trdatasu
Input setup time
RATM_DATA(15:0)
4
ns
Trdath
Input hold time
RATM_DATA(15:0)
1
ns
1
2
3
4
5
6
7
8
9
10
11
12
Trdatasu
Trdath
TraddQ
TrenQ
Trclavsu
Trclavh
Trsocsu
hh
p
hp
p
p
p
01
1F
1F
1F
00
01
10
1
0
1
0
p
ATM_CLK
RATM_DATA(15:0)
RATM_ADD(4:0)
/RATM_READ_EN
RATM_CLAV(3:0)
RATM_SOC



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