
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
536
Figure 53 Transmit Transport Overhead Port Timing
tH
TTOH
TOHCLK1-4
TTOH1-4
TTOHEN1-4
tS
TTOH
tP
tohfp
TOHFP1-4
tS
TTOHEN
tH
TTOHEN
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.
23.8 Transmit DCC Port Timing
Table 36 Transmit DCC Input/Output Timing
Symbol
Description
Min
Max
Units
FTSLDCLK
TSLDCLK Frequency
192 or 576
KhZ
TSTSLD
TSLD Set-up time to TSLDCLK rising edge
50
ns
THTSLD
TSLD Hold time to TSLDCLK rising edge
250
ns
TSTOHFP
9
TOHFP output setup time to TSLDCLK rising edge
4
ns
9
TOHFP is an output. Because it is used to synchronize the transmit DCC ports, it is
characterized with-respect to TLDCLK and TSLDCLK. Set-up and hold times are used to
provide the window the pulse is valid around a rising edge of TLDCLK and TSLDCLK.