XRT91L31IQ-F Exar Corporation, XRT91L31IQ-F Datasheet - Page 36

• Manufacturer Part Number: XRT91L31IQ-F
• Description: IC TXRX SONET/SDH 8BIT 64QFP
• Manufacturer: Exar Corporation
• Type: Transceiverr

Specifications of XRT91L31IQ-F

• Package / Case: 64-QFP
• Input: LVCMOS, LVPECL, LVTTL
• Output: LVCMOS, LVPECL, LVTTL
• Frequency - Max: 77.76MHz
• Voltage - Supply: 3.135 V ~ 3.465 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Frequency-max: 77.76MHz
• Product: Framer
• Number Of Transceivers: 1
• Data Rate: 155.52 Mbps
• Supply Voltage (max): 3.465 V
• Supply Voltage (min): 3.135 V
• Supply Current (max): 240 mA or 270 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 1016-1361

XRT91L31
STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
The jitter transfer function is a ratio between the jitter output and jitter input for a component, or system often
expressed in dB. A negative dB jitter transfer indicates the element removed jitter. A positive dB jitter transfer
indicates the element added jitter. A zero dB jitter transfer indicates the element had no effect on jitter.
The jitter attenuator within the XRT91L31 meets the latest jitter attenuation specifications and/or jitter transfer
characteristics as shown in the
F
F
Jitter generation is defined as the amount of jitter at the STS-N output in the absence of applied input jitter. The
bandwidth is set according to the data rate. The Bellcore and ITU requirement for this type jitter is 0.01UI rms
measured with a specific band-pass filter.
For more information on these specifications refer to Bellcore TR-NWT-000253 sections 5.6.2-5 and GR-253-
CORE section 5.6 and ITUT G.783 section 9.3.1.1.
BellCore GR-253 and ITUT G.783 versus XRT91L31 typical jitter performance.
4.6.3
IGURE
IGURE
26. J
27. J
Jitter Generation
ITTER
ITTER
T
T
RANSFER
RANSFER
-20
-25
-20
-25
-1 0
-1 5
-1 0
-1 5
-5
-5
5
0
5
0
1 00
1 00
F
F
OR
OR
Figure 26
Jitter Transfer, OC-3 (Low Bandwidth)
Jitter Transfer, OC12 (Low Bandwidth)
OC-12
OC-3
1 000
1 000
Mask
and
Mask
Figure
1 0000
1 0000
Frequency (Hz)
Frequency (Hz)
36
27.
Table 19
1 00000
1 00000
below shows the jitter generation limits per
Jitter Transfer
Jitter Transfer
1 000000
1 000000
1 0000000
1 0000000
REV. 1.0.2