參數(shù)資料
型號(hào)： DS21348T
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 26/76頁(yè)
文件大?。?/td> 0K
描述： IC LIU T1/E1/J1 3.3V 44-TQFP
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
產(chǎn)品變化通告： Product Discontinuation 20/Feb/2012
標(biāo)準(zhǔn)包裝： 160
類(lèi)型： 線(xiàn)路接口裝置（LIU）
驅(qū)動(dòng)器/接收器數(shù)： 1/1
規(guī)程： T1/E1/J1
電源電壓： 3.135 V ~ 3.465 V
安裝類(lèi)型： 表面貼裝
封裝/外殼： 44-TQFP
供應(yīng)商設(shè)備封裝： 44-TQFP（10x10）
包裝： 托盤(pán)
DS21348/DS21Q348
32 of 76
4.1 Device Power-Up and Reset
The DS21348 will reset itself upon power-up setting all writeable registers to 00h and clear the status and
information registers. CCR3.7 (TUA1) = 0 results in the LIU transmitting unframed all ones. After the
power supplies have settled following power-up, initialize all control registers to the desired settings, then
toggle the LIRST bit (CCR3.2). At anytime, the DS21348 can be reset to the default settings by bringing
HRST (pin 29) low (level triggered) or by powering down and powering up again.
CCR4 (03H): COMMON CONTROL REGISTER 4
(MSB)
(LSB)
L2
L1
L0
EGL
JAS
JABDS
DJA
TPD
SYMBOL
POSITION
DESCRIPTION
L2
CCR4.7
Line Build Out Select Bit 2. Sets the transmitter build out; see Table 7-1
for E1 and Table 7-2 for T1.
L1
CCR4.6
Line Build Out Select Bit 1. Sets the transmitter build out; see Table 7-1
for E1 and Table 7-2 for T1.
L0
CCR4.5
Line Build Out Select Bit 0. Sets the transmitter build out; see Table 7-1
for E1 and Table 7-2 for T1.
EGL
CCR4.4
Receive Equalizer Gain Limit. This bit controls the sensitivity of the
receive equalizer. See Table 4-2.
JAS
CCR4.3
Jitter Attenuator Select.
0 = place the jitter attenuator on the receive side
1 = place the jitter attenuator on the transmit side
JABDS
CCR4.2
Jitter Attenuator Buffer Depth Select.
0 = 128 bits
1 = 32 bits (use for delay-sensitive applications)
DJA
CCR4.1
Disable Jitter Attenuator.
0 = jitter attenuator enabled
1 = jitter attenuator disabled
TPD
CCR4.0
Transmit Power-Down.
0 = normal transmitter operation
1 = powers down the transmitter and tri-states the TTIP and TRING pins
Table 4-2. Receive Equalizer Sensitivity Settings
EGL
(CCR4.4)
ETS
(CCR1.7)
RECEIVE
SENSITIVITY
0
0 (E1)
-12dB (short haul)
1
0 (E1)
-43dB (long haul)
1
1 (T1)
-30dB (limited long haul)
0
1 (T1)
-36dB (long haul)
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS21348T+ 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
DS21348TB 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
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
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
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