DS3112+W Maxim Integrated Products, DS3112+W Datasheet - Page 122

• Manufacturer Part Number: DS3112+W
• Description: IC MUX T3/E3 3.3V 256-PBGA
• Manufacturer: Maxim Integrated Products

Specifications of DS3112+W

• Controller Type: Framer, Multiplexer
• Interface: Parallel/Serial
• Voltage - Supply: 3.135 V ~ 3.465 V
• Current - Supply: 150mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 256-PBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 14-2. Unchannelized Dual T3/E3 Application
14.2 M13 Basics
M13 multiplexing is a two-step process of merging 28 T1 lines into a single T3 line. First, four of the T1
lines are merged into a single T2 rate and then seven T2 rates are merged to form the T3. The first step of
this process is called a M12 function since it is merging T1 lines into T2. The second step of this process
is called a M23 function since it is merging T2 lines into a T3. The term M13 implies that both M12 and
M23 are being performed to map 28 T1 lines into the T3. These two steps are independent and will be
discussed separately.
Table 14-1. T Carrier Rates
T CARRIER
LEVEL
T1/DS1
T2/DS2
T3/DS3
PCI
Bus
CHATEAU
Controller
Channel
DS3134
HDLC
256
DATA RATE
NOMINAL
(Mbps)
44.736
1.544
6.312
44.2Mbps (T3) or
44.2Mbps (T3) or
34Mbps (E3)
34Mbps (E3)
datastream
datastream
122 of 133
Framer &
Framer &
DS3112
DS3112
TEMPE
TEMPE
T3/E3
T3/E3
G747
G747
M13/
M13/
E13/
E13/
Mux
Mux
bipolar
bipolar
NRZ
NRZ
I/F
I/F
I/F
I/F
Interface
Interface
DS3150
DS3150
OC-12/
OC-12/
OC-48
OC-48
OC-3/
OC-3/
T3/E3
T3/E3
Mux
Mux
Line
- or -
Line
- or -
T3/E3
Line
Optical
I/F
T3/E3
Line
Optical
I/F
DS3112