XRT75R12DIB-F Exar Corporation, XRT75R12DIB-F Datasheet - Page 113

• Manufacturer Part Number: XRT75R12DIB-F
• Description: Peripheral Drivers & Components (PCIs) 12 Channel 3.3V-5V temp -45 to 85C
• Manufacturer: Exar Corporation

Specifications of XRT75R12DIB-F

• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Operating Supply Voltage: 3.3 V to 5 V
• Package / Case: TBGA-420
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

REV. 1.0.3
N
Each of the scenarios presented in
DS3 De-Mapping Jitter is the amount of Intrinsic Jitter that will be measured within the "Line" or "Facility-side"
DS3 signal, (after it has been de-mapped from a SONET signal) without the occurrence of "Pointer
Adjustments" within the SONET signal.
Telcordia GR-253-CORE requires that the "DS3 De-Mapping" Jitter be less than 0.4UI-pp, when measured
over all possible combinations of DS3 and STS-1 frequency offsets.
Telcordia GR-253-CORE states that if each pointer adjustment (within a continuous stream of pointer
adjustments) is separated from each other by a period of 30 seconds, or more; then they are sufficiently
isolated to be considered "Single-Pointer Adjustments".
Figure 55 presents an illustration of the "Single Pointer Adjustment" Scenario.
Telcordia GR-253-CORE states that the Intrinsic Jitter that is measured (within the DS3 signal) that is
ultimately de-mapped from a SONET signal that is experiencing "Single-Pointer Adjustment" events, must
NOT exceed the value 0.3UI-pp + Ao.
N
T
F
8.5.1
8.5.2
ABLE
Continuous Pattern
Continuous Cancel
OTE
OTES
IGURE
Continuous Add
D
1. Ao is the amount of Intrinsic Jitter that was measured during the "De-Mapping" Jitter portion of this test.
2. Testing must be performed for both Incrementing and Decrementing Pointer Adjustments.
: All of these intrinsic jitter measurements are to be performed using a band-pass filter of 10Hz to 400kHz.
S
ESCRIPTION
:
43: S
CENARIO
55. I
DS3 De-Mapping Jitter
Single Pointer Adjustment
TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
UMMARY OF
LLUSTRATION OF
Initialization
S
N
CENARIO
UMBER
"C
A4
A5
A5
ATEGORY
S
INGLE
T
ELCORDIA
J
C
Table
I I
ITTER
ATEGORY
P
NTRINSIC
OINTER
Cool Down
Pointer Adjustment Events
1.0UI-pp
1.3UI-pp
1.3UI-pp
R
43, are briefly described below.
EQUIREMENTS
GR-253-CORE
I I
A
J
NTRINSIC
DJUSTMENT
APPLICATIONS
ITTER
109
R
EQUIREMENT PER
Includes effects of Jitter from Clock-Gapping, De-Map-
ping and Pointer Adjustments.
Includes effects of Jitter from Clock-Gapping, De-Map-
ping and Pointer Adjustments.
Includes effects of Jitter from Clock-Gapping, De-Map-
ping and Pointer Adjustments.
Measurement Period
S
>30s
CENARIO
T
ELCORDIA
C
OMMENTS
GR-253-CORE,
XRT75R12D
FOR
DS3