
PM5317 SPECTRA-9953 Telecom Standard Product Data Sheet
Release
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2000741, Issue 5
533
Symbol
Description
Min
Max
Units
THAIS
TPAISFP/TPAIS Hold Time
0
ns
TPDFPO
DFPO Propagation delay
0
6
ns
Figure 50 SPECTRA-9953 System Side Input/Output Timing
SYSCLK
DFP, AFP,
DCMP, ACMP,
TPAISFP, TPAIS
tS
fp
tH
fp
tLO
SYSCLK
tHI
SYSCLK
tP
dfpo
DFPO
Notes on Input Timing:
1. When a set-up time is specified between an input and a clock, the set-up time is the time in
nanoseconds from the 1.4 Volt point of the input to the 1.4 Volt point of the clock.
2. When a hold time is specified between an input and a clock, the hold time is the time in nanoseconds
from the 1.4 Volt point of the clock to the 1.4 Volt point of the input.
Notes on Output Timing:
1. Output propagation delay time is the time in nanoseconds from the 1.4 Volt point of the reference
signal to the 1.4 Volt point of the output.
2. Output propagation delays are measured with a 30 pF load on the outputs except when otherwise
specified.
23.5 Receive Transport Overhead Port and B3E Timing
Table 33 ROHCLK1-4/B3E Output Timing
Symbol
Description
Min
Max
Units
FROHCLK
ROHCLK1-4 Frequency : (ROHCLK is nominally 82.94 MHz
and is generated by gapping an internal 103.68 MHz receive
line clock)
103.51
103.68
MHz
TPROHFP
ROHCLK1-4 rising edge to ROHFP1-4 valid
1
6
ns
TPRTOH
ROHCLK1-4 rising edge to RTOH1-4 valid
1
6
ns
tPB3E
ROHCLK1-4 rising edge to B3E1-4 valid
1
6
ns