PM7366-PI datasheet(278/286 Pages) PMC

278 / 286 page

RELEASED

PM7366 FREEDM-8

DATA SHEET

PMC-1970930

ISSUE 4

FRAME ENGINE AND DATA LINK MANAGER

PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA,INC., AND FOR ITS CUSTOMERS’ INTERNAL USE

265

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. Maximum and minimum output propagation delays are measured with a 50 pF load on all the

outputs, except for PCI Bus outputs and TD[2:0] outputs. For PCI Bus outputs, maximum

output propagation delays are measured with a 50 pF load while minimum output propagation

delays are measured with a 0 pF load. For TD[2:0] outputs, propagation delays are measured

with a 20 pF load. Maximum propagation delay for TD[2:0] increases by 1.0 ns for each 10 pF

of extra load.

3. Output propagation delays of signal outputs that are specified in relation to a reference output

are measured with a 50 pF load on both the signal output and the reference output.

4. Applicable only to channelised T1 links and measured between framing bits.

5. Applicable only to channelised E1 links and measured between framing bytes.

6. Applicable only to unchannelised links of any format and measured between any two TCLK

rising edges.

7. Output tri-state delay is the time in nanoseconds from the 1.4 Volt point of the reference signal

to the point where the total current delivered through the output is less than or equal to the

leakage current.

Figure 40 – Transmit Link Output Timing

TCLK[n]

tP TD

TD[n]

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