Figure-12 External Transmit/Receive Line Circuitry" />
參數(shù)資料
型號(hào)： IDT82V2048SDAG
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(biāo)準(zhǔn)包裝： 5,000
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(yīng)商設(shè)備封裝： 144-TQFP（20x20）
包裝： 托盤
其它名稱： 82V2048SDAG
20
IDT82V2048S OCTAL T1/E1 SHORT HAUL LIU WITH SINGLE ENDED OPTION
INDUSTRIAL TEMPERATURE RANGES
Figure-12 External Transmit/Receive Line Circuitry (Differential Receive Interface)
Figure-13 External Transmit/Receive Line Circuitry (Single Ended Receive Interface)
2.8
TRANSMIT DRIVER POWER SUPPLY
All transmit driver power supplies must be 5.0 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. To opti-
mize the power consumption of the device, series resistors are removed
in this case.
For T1 applications, only 5.0 V operation is supported. However, 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.
0.22
F
RX Line
1 k
RR
TX Line
RT
RTIPn
RRINGn
TRINGn
TTIPn
0.1
F
GNDTn
VDDDn
VDDT
IDT82
V20
48S
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
RX Line
TX Line
RT
RTIPn
RRINGn
TRINGn
TTIPn
0.1
F
GNDTn
VDDDn
VDDT
ID
T82
V20
48S
One of Eight Identical Channels
VDDT
D4
D3
D2
D1
2:1
1
2:1
1
19
Cp
3
2
A
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.
4. The line input signal is coupled to pin RTIPn with a 100 nF capacitor while pin RRINGn, should be AC coupled to ground through a 100 nF capacitor.
68
F
100 nF
100 nF4
RR
1 K
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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