DS21Q55N Maxim Integrated Products, DS21Q55N Datasheet - Page 94

• Manufacturer Part Number: DS21Q55N
• Description: Framer E1/J1/T1 3.3V 256-Pin BGA
• Manufacturer: Maxim Integrated Products

Specifications of DS21Q55N

• Package: 256BGA
• Number Of Transceivers: 4
• Standard Framing Format: E1|J1|T1
• Maximum Supply Current: 75(Typ) mA
• Minimum Single Supply Voltage: 3.135 V
• Maximum Single Supply Voltage: 3.465 V

DS21Q55 Quad T1/E1/J1 Transceiver
14.2.1.2 E1 Mode
In E1 mode, TS16 carries the signaling information. This information can be in either CCS (common
channel signaling) or CAS (channel associated signaling) format. The 32 time slots are referenced by two
different channel number schemes in E1. In “Channel” numbering, TS0–TS31 are labeled channels 1
through 32. In “Phone Channel” numbering, TS1–TS15 are labeled channel 1 through channel 15 and
TS17–TS31 are labeled channel 15 through channel 30.
Table 14-A. Time Slot Numbering Schemes
TS
0 1 2 3 4 5 6 7 8 9 10 11 1213 14 1516 17 1819 20 2122 23 2425 26 27 28 29 30 31
Channel 1 2 3 4 5 6 7 8 9 10 11 12 1314 15 1617 18 1920 21 2223 24 2526 27 28 29 30 31 32
1 2 3 4 5 6 7 8 9 10 11 1213 14 15
16 1718 19 2021 22 2324 25 26 27 28 29 30
Phone
Channel
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