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PIN DESCRIPTION
PIN #
8
NAME
STS-1
9
NC
XRT71D00
E3/DS3/STS-1 JITTER ATTENUATOR
REV. 1.2.0
TYPE
DESCRIPTION
I SONET STS-1 Mode Select:
This pin along with the E3/DS3* select pin (pin 29) configures the XRT71D00 either in
E3, DS3 or STS-1 mode.
A table relating the setting of these two input pins to the operating modee of the
XRT71D00 device is given below:
STS-1
E3/DS3*
XRT71D00 Operating Mode
0
0
DS3 (44.736 MHz)
0
1
E3 (34.368 MHz)
1
0
STS-1 (51.84 MHz)
1
1
E3 (34.368 MHz)
NOTES:
1. For “SONET De-Synchronization” Applications, the user should configure the
XRT71D00 device to operate in the “DS3” Mode.
2. This input pin is active only in the Hardware Mode
3. This pin contains an Internal 50 K Ohm pull-up resistor.
*** This pin is not connected internally
4