PM7344 datasheet(276/293 Pages) PMC

276 / 293 page

PM7344 S/UNI-MPH

DATA SHEET

PMC-950449

ISSUE 6

MULTI-PHY USER NETWORK INTERFACE

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

260

S/UNI-MPH I/O TIMING CHARACTERISTICS

TA= -40° to +85°C, VDD=5V ±10%

Table 8

- XCLK Input for Jitter Attenuation (Figure 40)

Symbol

Description

Min

Max

Units

tXCLK

XCLK Frequency (typically 37.056

MHz ± 100 ppm for T1 format or

49.152 MHz ± 50 ppm for E1

format)3

MHz

tDXCLK

XCLK Duty Cycle (at XCLK =

37.056 MHz for T1, 49.152 MHz for

E1)5

Figure 40

- XCLK Input Timing for Jitter Attenuation

XCLK

1/t

Table 9

- TCLKI Input (Figure 41)

Symbol

Description

Min

Max

Units

tT1TCLKI

TCLKI Frequency for T13,4

(nominally 1.544 MHz ± 130 ppm)

1.545

MHz

tE1TCLKI

TCLKI Frequency for E13,4

(nominally 2.048 MHz ± 50 ppm)

2.049

MHz

tJ2TCLKI

TCLKI Frequency for J2 bit rate

format

MHz

tARTCLKI

TCLKI Frequency for arbitrary bit

rate format

MHz

tHTTCLKI

TCLKI High Duration (for T1

formats)6

165

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