S3030B
E4/STM-1/OC-3 ATM 4-BIT TRANSCEIVER
Table 4. Receiver Input Pin Assignment and Description (Continued)
Pin Name
LOSOPT
Level
I/O
Pin #
Description
PECL
I
52
Loss of Optical Signal. Active Low. This input has the same
functionality as LOSIN, except that it is used in optical mode
instead of electrical. It should be driven by the external optical
receiver module to indicate a loss of received optical power
LOSREF
Analog
I
I
49
Loss of Signal Reference. Sets the comparator levels for LOSIN.
(See Table 11.)
CAP3
CAP4
60
59
Loop Filter Capacitor Network. The loop filter capacitor network is
connected to these pins. The capacitor value should be 1.0µf ±
10% tolerance, X7R dielectric. The resistors should be 51 Ohms.
12
AMCC [ APPLIED MICRO CIRCUITS CORPORATION ]
