DS21Q58L+ Maxim Integrated Products, DS21Q58L+ Datasheet - Page 52

• Manufacturer Part Number: DS21Q58L+
• Description: IC TXRX E1 QUAD 3.3V 100LQFP
• Manufacturer: Maxim Integrated Products

Specifications of DS21Q58L+

• Function: Transceiver
• Interface: E1
• Number Of Circuits: 4
• Voltage - Supply: 3.14 V ~ 3.47 V
• Current - Supply: 230mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 100-LQFP
• Includes: AIS Alarms Detector and Generator, Loopback Functions, PRBS Generator / Detector, Remote Detector and Generator
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power (watts): -

21.4.2 Undedicated Clock Jitter Attenuator
The undedicated jitter attenuator is useful for preparing a user-supplied clock for use as a transmission clock
(TCLK). AJACKI is the input pin and AJCAKO is the output pin. Clocks generated by certain types of PLL or other
synthesizers can contain too much jitter to be appropriate for transmission. Network requirements limit the amount
of jitter that can be transmitted onto the network. This feature is enabled by setting SC1CR.7 = 1 in Transceiver 1.
Figure 21-5. Jitter Tolerance
Figure 21-6. Jitter Attenuation
100
1k
10
0.1
-40
-60
-20
1
0
1
1
40
JITTER ATTENUATION CURVE
10
10
20
MINIMUM TOLERANCE
40
LEVEL AS PER
ITU G.823
100
FREQUENCY (Hz)
100
FREQUENCY (Hz)
1.5
52 of 74
DS21Q58
TOLERANCE
1k
1k
PROHIBITED AREA
ETS 300 011 AND TBR12
PROHIBITED AREA
2.4k
ITU G.7XX
10k
10k
18k
0.2
100k
100k