DS3112N+W Maxim Integrated Products, DS3112N+W Datasheet - Page 131

• Manufacturer Part Number: DS3112N+W
• Description: Network Controller & Processor ICs M13-E13-G.747 Mux an d T3-E3 Framer T3-E3
• Manufacturer: Maxim Integrated Products

Specifications of DS3112N+W

• Product: Framer
• Number Of Transceivers: 1
• Data Rate: 44.736 Mbps
• Supply Voltage (max): 3.465 V
• Supply Voltage (min): 3.135 V
• Supply Current (max): 150 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Package / Case: BGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

14.11 G.747 Basics
G.747 multiplexing is a mixture of T3 and E1. It is a two-step process of merging 21 E1 lines into a
single T3 line. First, three of the E1 lines are merged into a single T2 rate and then seven T2 rates are
merged to form the T3 just like the normal T2 to T3 multiplexing scheme. Once the three E1 lines have
been multiplexed together, the resultant 6.312Mbps data stream is treated just like a T2 data stream that
contains four T1 lines. We will only discuss the G.747 multiplexing scheme in this section. See Section
14.6
Table 14-6. G.747 Carrier Rates
for details on the T2 to T3 multiplexing scheme (e.g., M23) and the T3 framing structure.
CARRIER
T OR E
LEVEL
E1
T2
T3
NOMINAL DATA
RATE (Mbps)
44.736
2.048
6.312
131 of 133
DS3112