SI5600 Datasheet, PDF (19/28 Pages) List of Unclassifed Manufacturers – SiPHY-TM OC-192/STM-64 SONET/SDH TRANSCEIVER

Pin Descriptions: Si5600
Si5600
Pin Number(s)
M7
Name
BWSEL
F12
DLBK
K3
FIFOERR
M6
FIFORST
B1, C1–2, D5–
11, D2, E11, E2,
F11, F1–2, G11,
G2, H11, H2,
J11, J1–4, K2,
K11, L5–11, L2,
M1–4
H12
GND
LLBK
G3
LOS
C3
LOSLVL
I/O
I
I
O
I
GND
Signal Level
Description
LVTTL
Bandwidth Select DSPLL.
This input selects loop bandwidth of the DSPLL.
BWSEL = 0: Loop bandwidth set to 12 kHz.
BWSEL = 1: Loop bandwidth set to 50 kHz.
LVTTL
Diagnostic Loopback.
When this input is active low the transmit clock
and data are looped back for output on RXDOUT,
RXCLK1 and RXCLK2. This pin should be held
high for normal operation.
LVTTL
FIFO Error.
This output is driven high when a FIFO overflow/
underflow has occurred. This output will stick
high until reset by asserting FIFORST.
LVTTL
FIFO RESET.
This input when asserted high resets the read/
write FIFO pointers to their initial state.
Supply Ground.
I
LVTTL
Line Loopback.
When this input is active low the recovered clock
and data are looped back for output on TXDOUT,
and TXCLKOUT. This pin should be held high for
normal operation.
O
LVTTL
Loss-of-Signal.
This output is driven low when the peak-to-peak
signal amplitude is below threshold set via
LOSLVL.
I
LOS Threshold Level.
Applying an analog voltage to this pin allows
adjustment of the threshold used to declare LOS.
Tieing this input high disables LOS detection and
forces the LOS output high.
Preliminary Rev. 0.31
19