參數(shù)資料
型號(hào)： DS21348TN
英文描述： 3.3V E1/T1/J1 Line Interface
中文描述： 3.3 E1/T1/J1線路接口
文件頁數(shù)： 51/73頁
文件大?。?/td> 551K
代理商： DS21348TN
DS21348/Q348
51 of 73
PROTECTED INTERFACE USING EXTERNAL RECEIVE TERMINATION
Figure 9-3
NOTES:
1.
All resistor values are ±1%.
2.
C1 = 0.1μF.
3.
S is a 6V transient suppresser.
4.
D1 to D4 are Schottky diodes.
5.
The fuses are optional to prevent AC power line crosses from compromising the transformers.
6.
Rp resistors exist to keep the Fuses from opening during a surge. If they are used, then Rr must be
adjusted to match the line impedance.
7.
Rr = 37.5 for 75 or 60 for 120 E1 systems, or 50 for 100 T1 lines.
8.
The Rt resistors are used to increase the transmitter return loss (Table 9-1). No return loss is required
for T1 applications.
9.
The transmit transformer turns ratio (N) would be 1:2 for 3.3V operation.
10.
The 68 F is used to keep the local power plane potential within tolerance during a surge.
RTIP
RRING
TTIP
TRING
Receive
Line
N:1
(larger winding
toward the network)
DS21348
1.0μF
(non-
polarized)
VDD (21)
VSS (22)
VDD (36)
VSS (35)
2.048MHz
(this clock can also
be 1.544MHz for T1
only applications)
MCLK
+VDD
S
C1
D1
D2
D3
D4
1:1
0.1μF
470
470
Rp
Fuse
Rp
Fuse
(optional)
Rr
Rr
Rt
Rt
Transmit
Line
Rp
Fuse
Rp
Fuse
(optional)
0.1μF
0.1μF
+VDD
0.01μF
68μF
10μF
10μF
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS21348TN+ 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 3.3V E1/T1/J1 Line Interface RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS21348TNB 功能描述:網(wǎng)絡(luò)控制器與處理器 IC RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS21348T-W 功能描述:網(wǎng)絡(luò)控制器與處理器 IC RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS21349 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:3.3V T1/J1 Line Interface Unit
DS21349DK 功能描述:網(wǎng)絡(luò)開發(fā)工具 DS21349 Design Kit RoHS:否 制造商:Rabbit Semiconductor 產(chǎn)品:Development Kits 類型:Ethernet to Wi-Fi Bridges 工具用于評(píng)估:RCM6600W 數(shù)據(jù)速率:20 Mbps, 40 Mbps 接口類型:802.11 b/g, Ethernet 工作電源電壓:3.3 V
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