ACS8530T Semtech Corporation, ACS8530T Datasheet - Page 141

• Manufacturer Part Number: ACS8530T
• Description: Synchronous Equipment Timing Source for Stratum 2/3E Systems
• Manufacturer: Semtech Corporation

Figure 26 AMI Input and Output Signal Levels
Figure 27 Recommended Line Termination for AMI Input/Output Ports
Note...The AMI inputs I1 and I2 should be connected to the external AMI clock source by 470 nF coupling capacitor C1.
The AMI differential output T08POS/T08NEG should be coupled to a line transformer with a turns ratio of 3:1.
Components C2 = 470 pF and C3 = 2 nF. If a transformer with a turns ratio of 1:1 is used, a 3:1 ratio potential
divider R
Jitter Performance
Output jitter generation measured over 60 second interval, UI p-p max measured using C-MAC E2747 12.800 MHz
TCXO on ICT Flexacom tester.
Note...This table is only for comparing the ACS8530 output jitter performance against values and quoted in various specifications for given
conditions. It should not be used to infer compliance to any other aspects of these specifications.
Revision 3.02/November 2005 © Semtech Corp.
ADVANCED COMMUNICATIONS
2 V p-p
load
AMI input
signal
AMI input
signal
must be used to achieve the required 1 V p-p voltage level for the positive and negative pulses.
+1.0 V
-1.0 V
0 V
IM
Signal structure of 64 kHz/8 kHz central
clock interface after suitable transformer.
IL
IH
1V
C1
C1
7.8 us
15.6 us
1V
I1
I2
TO8POS
TO8NEG
C1
C1
FINAL
Page 141
I1
I2
C2
Turns
ratio
3:1
T08POS
T08NEG
R
load
C2
C3
+VDD
0 V
+VDD
0 V
AMI output signal
to external devices
GND
F8530D_023AMI_lineterm_04
ACS8530 SETS
F8530D_020AMIIPandOPSigLevels_02
7.8 us
7.8 us
15.6 us
15.6 us
DATASHEET
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