XRT75R12DIB-F Exar Corporation, XRT75R12DIB-F Datasheet - Page 110

• 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

XRT75R12D
TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
Figure 53
with the "D" bits designated.
N
During the STS-1 frame that follows the "Negative Byte-Stuffing" Event
The "D" bits (within the pointer-word) will be set back to their normal value; and the contents of the H1 and H2
bytes will be decremented by one.
F
BYTES
OTE
IGURE
b. The "Transmitting" Network Element will notify the remote terminal of this "negative-stuff" event by
: At this time the "D" bits are inverted in order to denote that a "decrementing" pointer adjustment event is currently
inverting certain bits within the "pointer word" (within the H1 and H2 bytes) that are referred to as "D" bits.
)
occurring.
WITH THE
53. A
presents an illustration of the bit format within the 16-bit word (consisting of the H1 and H2 bytes)
N
MSB
N
I
LLUSTRATION OF THE
"D"
N
BITS DESIGNATED
N
H1 Byte
N
S
B
IT
-F
S
ORMAT WITHIN THE
I
D
106
10 Bit Pointer Expression
I
16-
D
BIT WORD
I
H2 Byte
D
(
CONSISTING OF THE
I
D
I
LSB
D
H1
AND
REV. 1.0.3
H2