MT9044AL Zarlink, MT9044AL Datasheet - Page 26

• Manufacturer Part Number: MT9044AL
• Description: Framer E1/OC3/T1 5V 44-Pin MQFP
• Manufacturer: Zarlink

Specifications of MT9044AL

• Package: 44MQFP
• Maximum Data Rate: 2.048 Mbps
• Number Of Transceivers: 1
• Standard Framing Format: E1|OC3|T1
• Maximum Supply Current: 90 mA
• Minimum Single Supply Voltage: 4.5 V
• Maximum Single Supply Voltage: 5.5 V

For complete Manual Control state machine details, refer to Table 4 for the State Table, and Figure 7 for the State
Diagram.
Single Reference Source E1 to STS-3 with 8 kHz Reference
The device may operate in freerun mode or with a single reference source. The 8 kHz output from the MT9075 is
sourced from the clock extracted from the E1 trunk. It becomes the reference for the PLL which then generates ST-
BUS signals F0o, C4o and C2o to form the system backplane clock. The MT90840 connects to the system
backplane, as well as to an OC3 link via an STS-3 Framer and optical link. The 19.44 Mhz clock required by the
MT90840 is generated by the MT9044. In the event that the E1 link is broken, the LOS output of the MT9075 goes
high placing the MT9044 in freerun mode.
To OC3 Line
RX Line
TX Line
XFMR
XFMR
To E1 Line
To
To
TX Line
RX Line
XFMR
XFMR
To
To
PDo0-7
PPFTo
PDi0-7
PCKR
PPFRi
TTIP
TRING
RTIP
RRING
MT90840
Figure 17 - Single Source - E1 to STS-3 with 8 kHz Reference
MT90820
MT9075
STo0-7
STo1-8
STi0-7
STi1-8
PCKT
RxFP
DSTo
STo0
DSTi
STi0
LOS
C4b
C4i
C4i
F0i
F0i
F0i
Zarlink Semiconductor Inc.
MT9044
26
1 kΩ
10 nF
10 kΩ
TCLR
RST
PRI
LOS1
LOS2
MS1
MS2
RSEL
MT9044
+ 5 V
C1.5o
ACKo
OSCi
C19o
ACKi
C4o
FS1
FS2
F0o
GTi
+ 5 V
Out
20 MHz
CLOCK
Data Sheet
±
32 ppm