MT90733 Просмотр технического описания (PDF) - Mitel Networks
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MT90733 Datasheet PDF : 8 Pages
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MT90733 CMOS
Advance Information
Transmit Reference Generator Interface
Pin #
Name I/O/P
Description
45
TDOUT
O 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.
46
TCG
O 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.
47
TFOUT
O 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.
48
TCOUT
O Transmit Reference Generator Clock Out. Clock signal that is derived from
the transmit reference generator clock input (TCIN).
52
TCIN
I 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%.
Note: I = Input; O = Output; P = Power
Receive C-Bit Interface
Pin #
Name I/O/P
Description
30
CRDCC
O 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).
35
CRF
O C-Bit Receive Framing Pulse. Provides a time base reference for clocking in
the C-bits in a DS3 frame.
36
CRCK
O C-Bit Receive Clock. A gapped clock which clocks C-bit data out of the DS3F
on positive transitions.
37
CRD
O
Note: I = Input; O = Output; P = Power
C-Bit Receive Data. Serial interface for receiving the selected C-bits in the C-
bit parity mode.
Transmit C-Bit Interface
Pin #
Name I/O/P
Description
28
CXD
I C-Bit Transmit Data. Serial interface for transmitting the selected C-bits in the
C-bit parity mode.
64
CXDCC
O C-Bit Transmit Data Link Clock. A gapped clock provided for clocking the
three data link bits (C13, C14, and C15).
65
CXF
O C-Bit Transmit Framing Pulse. Identifies the location of the first C-bit in the
DS3 frame.
68
CXCK
O
Note: I = Input; O = Output; P = Power
C-Bit Transmit Clock. A gapped clock which clocks the external C-bit serial
data into the DS3F on positive transitions.
5-26
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