PM5347 datasheet(277/302 Pages) PMC

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PM5347 S/UNI-PLUS

DATA SHEET

PMC-941033

ISSUE 6

SATURN USER NETWORK INTERFACE PLUS

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

261

S/UNI-PLUS TIMING CHARACTERISTICS

(TC = -40°C to +85°C, VDD = 5 V ±5%)

Table 16

- Line Side Receive Interface (Figure 37)

Symbol

Description

Min

Max

Units

RRCLK+/RRCLK- Duty Cycle

51.84 or 155.52 MHz (RBYP high)

19.44 or 6.48 MHz (RBYP low)

RXD+/RXD- Operating Frequency

STS-3c/STM-1 (RBYP high)

156

Mbit/s

STS-3c/STM-1 (RBYP low)

155

156

Mbit/s

STS-1 (RBYP high)

Mbit/s

STS-1 (RBYP low)

Mbit/s

RRCLK+/RRCLK- Frequency

Tolerance†

-20

+20

ppm

tSRXD

RXD+/RXD- Setup time to

RRCLK+/RRCLK- (RBYP asserted

high.)

1ns

tHRXD

RXD+/RXD- Hold time to

RRCLK+/RRCLK- (RBYP asserted

high.)

1.5

† Note:

The specification may be relaxed to +/- 50 ppm if the S/UNI-PLUS is not loop

timed, or for applications that do not require this timing accuracy. If loop timing is

enabled, the tighter tolerance is required to meet the SONET free run accuracy

specification under loss of signal conditions. Frequency tolerance is measured

with respect to the receive stream on RXD+/- when clock recovery is enabled

(RBYP is low).

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