MT90733
CMOS
Advance Information
Transmit Reference Generator Interfac
e
Pin #
45
Name
TDOUT
I/O/P
O
Description
Transmit Reference Generator Data Output.
A DS3 frame is provided on
this signal lead with only the appropriate M and F bits. All other bits in the
frame are held active low.
Transmit Reference Generator Clock Gap Signal.
An active low, one clock
cycle wide (TCOUT) output signal that is synchronous with bit 1 in each 85-bit
group (56 overhead bits) in the DS3 frame.
Transmit Reference Generator Framing Pulse.
An active low, one clock
cycle wide (TCOUT) output pulse that is synchronous with bit 1 in the DS3
frame.
Transmit Reference Generator Clock Out.
Clock signal that is derived from
the transmit reference generator clock input (TCIN).
Transmit Reference Generator Clock In.
A 44.736 Mbit/s clock with a stabil-
ity of
±20
ppm and a duty cycle of 50
±10%.
46
TCG
O
47
TFOUT
O
48
52
TCOUT
TCIN
O
I
Note: I = Input; O = Output; P = Power
Receive C-Bit Interface
Pin #
30
Name
CRDCC
I/O/P
O
Description
C-Bit Receive Data Link Clock.
A gapped clock provided for clocking in the
three data link bits (C13, C14, and C15) into external circuitry from the serial
data (CRD).
C-Bit Receive Framing Pulse.
Provides a time base reference for clocking in
the C-bits in a DS3 frame.
C-Bit Receive Clock.
A gapped clock which clocks C-bit data out of the DS3F
on positive transitions.
C-Bit Receive Data.
Serial interface for receiving the selected C-bits in the C-
bit parity mode.
35
36
37
CRF
CRCK
CRD
O
O
O
Note: I = Input; O = Output; P = Power
Transmit C-Bit Interface
Pin #
28
64
65
68
Name
CXD
CXDCC
CXF
CXCK
I/O/P
I
O
O
O
Description
C-Bit Transmit Data.
Serial interface for transmitting the selected C-bits in the
C-bit parity mode.
C-Bit Transmit Data Link Clock.
A gapped clock provided for clocking the
three data link bits (C13, C14, and C15).
C-Bit Transmit Framing Pulse.
Identifies the location of the first C-bit in the
DS3 frame.
C-Bit Transmit Clock.
A gapped clock which clocks the external C-bit serial
data into the DS3F on positive transitions.
Note: I = Input; O = Output; P = Power
5-26
MITEL [ MITEL NETWORKS CORPORATION ]
