參數(shù)資料
型號： IDT82V2048DAG
廠商： IDT, Integrated Device Technology Inc
文件頁數(shù)： 13/62頁
文件大?。?/td> 0K
描述： IC LIU T1/E1 8CH SHORT 144-TQFP
標準包裝： 30
類型： 線路接口裝置（LIU）
規(guī)程： E1
電源電壓： 3.13 V ~ 3.47 V
安裝類型： 表面貼裝
封裝/外殼： 144-LQFP
供應商設(shè)備封裝： 144-TQFP（20x20）
包裝： 托盤
其它名稱： 82V2048DAG
20
IDT82V2048 OCTAL T1/E1 SHORT HAUL LINE INTERFACE UNIT
INDUSTRIAL TEMPERATURE RANGES
2.7
LINE INTERFACE CIRCUITRY
The transmit and receive interface RTIPn/RRINGn and TTIPn/
TRINGn connections provide a matched interface to the cable. Figure-
14 shows the appropriate external components to connect with the cable
for one transmit/receive channel. Table-12 summarizes the component
values based on the specific application.
Figure-14 External Transmit/Receive Line Circuitry
2.8
TRANSMIT DRIVER POWER SUPPLY
All transmit driver power supplies must be 5.0 V or 3.3 V.
In E1 mode, despite the power supply voltage, the 75 /120 lines
are driven through a pair of 9.5 series resistors and a 1:2 transformer.
In T1 mode, only 5.0 V can be selected, 100 lines are driven through
a pair of 9.1 series resistors and a 1:2 transformer.
In harsh cable environment, series resistors are required to improve
the transmit return loss performance and protect the device from surges
coupling into the device.
Table-11 Output Jitter Specification
T1
E1
AT&T Pub 62411
ITU-T G.736
GR-253-CODE
ITU-T G.742
TR-TSY-000009
ITU-T G.783
ETSI CTR 12/13
Table-12 External Components Values
Component
E1
T1
75
Coax
120
Twisted Pair
100
Twisted Pair, VDDT = 5.0 V
R
T
9.5
± 1%
9.5
± 1%
9.1
± 1%
R
9.31
± 1%
15
± 1%
12.4
± 1%
Cp
2200 pF
1000 pF
D1 - D4
Nihon Inter Electronics - EP05Q03L, 11EQS03L, EC10QS04, EC10QS03L; Motorola - MBR0540T1
0.22
F
RX Line
1 k
RR
TX Line
RT
RTIPn
RRINGn
TRINGn
TTIPn
0.1
F
GNDTn
VDDDn
VDDT
ID
T8
2V204
8
One of Eight Identical Channels
VDDT
D4
D3
D2
D1
2:1
1
2:1
1
1 k
Cp
3
2
A
B
NOTE:
1. Pulse T1124 transformer is recommended to be used in Standard (STD) operating temperature range (0°C to 70°C), while Pulse T1114
transformer is recommended to be used in Extended (EXT) operating temperature range is -40°C to +85°C. See Transformer Specifications Table
for details.
2. Typical value. Adjust for actual board parasitics to obtain optimum return loss.
3. Common decoupling capacitor for all VDDT and GNDT pins. One per chip.
68
F
VDDT
D6
D5
VDDT
D8
D7
Table-13 Transformer Specifications(1)
1. Pulse T1124 transformer is recommended to be used in Standard (STD) operating temperature range (0°C to 70°C), while Pulse T1114 transformer is recommended to be used in
Extended (EXT) operating temperature range is -40°C to +85°C.
Electrical Specification @ 25°C
Part No.
Turns Ratio (Pri: sec ± 2%)
OCL @ 25°C (mH MIN)
LL (H MAX)
CW/W (pF MAX)
Package/Schematic
STD Temp.
EXT Temp.
Transmit
Receive
Transmit
Receive
Transmit
Receive
Transmit Receive
T1124
T1114
1:2CT
1CT:2
1.2
.6
35
TOU/3
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