PM4351(2001) Просмотр технического описания (PDF) - PMC-Sierra

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PM4351
(Rev.:2001)

Combined E1/T1/J1 Transceiver/Framer

PMC-Sierra 

STANDARD PRODUCT

DATA SHEET

PMC-1970624

ISSUE 10

PM4351 COMET

COMBINED E1/T1 TRANSCEIVER

3. BTCLK and BRCLK instantaneous period variation of +/- 8% (typical) can be

tolerated by the device, as long as the frequency specification of +/- 200ppm

is complied with.

4. High pulse width is measured from the 1.4 Volt points of the rise and fall

ramps. Low pulse width is measured from the 1.4 Volt points of the fall and

rise ramps.

5. XCLK accuracy is ± 100 ppm.

6. TCLKI can be a jittered clock signal subject to the minimum high and low

durations tHTCLKI, tLTCLKI. These durations correspond to nominal XCLK

input frequencies.

Notes on Output Timing:

7. 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.

8. Maximum output propagation delays are measured with a 50 pF load on the

output.

PROPRIETARY AND CONFIDENTIAL

457

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