Figure-8 Transmit/Receive Line Circui" />
參數(shù)資料
型號： IDT82V2041EPPG8
廠商： IDT, Integrated Device Technology Inc
文件頁數(shù)： 15/75頁
文件大?。?/td> 0K
描述： IC LIU T1/J1/E1 1CH 44-TQFP
標準包裝： 1,250
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： 44-LQFP
供應商設備封裝： 44-TQFP（10x10）
包裝： 帶卷 (TR)
其它名稱： 82V2041EPPG8
IDT82V2041E
SINGLE CHANNEL T1/E1/J1 SHORT HAUL LINE INTERFACE UNIT
Functional Description
22
December 9, 2005
Figure-8 Transmit/Receive Line Circuit
In hardware control mode, TERM and PULS[3:0] pins can be used to
select impedance matching for both receiver and transmitter. If TERM pin
is low, external impedance network will be used for impedance matching.
If TERM pin is high, internal impedance will be used for impedance match-
ing and PULS[3:0] pins can be set to select the specific internal impedance.
Refer to 5 Hardware Control Pin Summary for details.
3.4.2
LINE MONITOR
In both T1/J1 and E1 short haul applications, the non-intrusive monitor-
ingonchannelslocatedinotherchipscanbeperformedbytappingthemon-
itored channel through a high impedance bridging circuit. Refer to Figure-
After a high resistance bridging circuit, the signal arriving at the RTIP/
RRING is dramatically attenuated. To compensate this attenuation, the
Monitor Gain can be used to boost the signal by 22 dB, 26 dB and 32 dB,
selected by MG[1:0] bits (RCF2, 0CH). For normal operation, the Monitor
Gain should be set to 0 dB.
In hardware control mode, MONT pin can be used to set the Monitor
Gain. When MONT pin is low, the Monitor Gain is 0 dB. When MONT pin
ishigh,theMonitorGainis26dB.Referto5HardwareControlPinSummary
for details.
NotethatLOSindicationisnotsupportedifthedeviceisoperatedinLine
Monitor Mode
Figure-9 Monitoring Receive Line in Another Chip
Figure-10 Monitor Transmit Line in Another Chip
A
B
RX Line
RR
TX Line
RT
RTIP
RRING
TRING
TTIP
IDT
82V2041E
VDDT
D4
D3
D2
D1
1:1
2:1
D6
D5
D8
D7
Cp
VDDA
0.1
F
GNDT
VDDT
68
F1
3.3 V
0.1
F
GNDA
VDDA
68
F
3.3 V
1
4
Note: 1. Common decoupling capacitor, one per chip
2. Cp 0-560 (pF)
3. D1 - D8, Motorola - MBR0540T1; International Rectifier - 11DQ04 or 10BQ060
4. RT/ RR: refer to Table-10 and Table-11 respecivley for RT and RR values
RTIP
RRING
RTIP
RRING
normal receive mode
monitor mode
DSX cross connect
point
R
monitor gain
=22/26/32dB
monitor
gain=0dB
TTIP
TRING
RTIP
RRING
normal transmit mode
monitor mode
DSX cross connect
point
R
monitor gain
=22/26/32dB
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IDT82V2042EPFG8 功能描述:IC LIU T1/J1/E1 2CH SHORT 80TQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 驅(qū)動器，接收器，收發(fā)器 系列:- 標準包裝:250 系列:- 類型:收發(fā)器 驅(qū)動器/接收器數(shù):2/2 規(guī)程:RS232 電源電壓:3 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應商設備封裝:16-TSSOP 包裝:帶卷 (TR)
IDT82V2044 制造商:IDT 制造商全稱:Integrated Device Technology 功能描述:QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT
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