參數(shù)資料
型號: DS26303L-75
廠商: MAXIM INTEGRATED PRODUCTS INC
元件分類: 數(shù)字傳輸電路
英文描述: 3.3V, E1/T1/J1, Short-Haul, Octal Line Interface Unit
中文描述: DATACOM, PCM TRANSCEIVER, PQFP144
封裝: 20 X 20 MM, 1.40 MM HEIGHT, MS-026, LQFP-144
文件頁數(shù): 57/97頁
文件大?。?/td> 966K
代理商: DS26303L-75
DS26303: 3.3V, T1/E1/J1, Short-Haul, Octal Line Interface Unit
57 of 97
6.3.2 LIU Transmit Front End
It is recommended to configure the transmitter’s LIU as described in
Figure 6-4
and in
Table 6-4
. No series
resistors are required. The transmitter has internal termination for E1, J1, and T1 modes.
Figure 6-4. LIU Front End
C1
DS26303
(One Channel)
TTIP
TRING
RTIP
RRING
Dt
Dt
Dt
Dt
Ct
1:2
TFt
1:2
TFr
Tx Line
Rx Line
TVDDn
TVSSn
TVS1
3.3V
C2
3.3V
C3
AVDDn
AVSSn
3.3V
C4
Rt
C5
Rt
30
Table 6-4. LIU Front-End Values
MODE
COMPONENT
75
COAX
120
TWISTED
PAIR
100 /110
TWISTED PAIR
Tx Capacitance
Ct
560pF typical. Adjust for board parasitics for optimal return loss.
International Rectifier: 11DQ04 or 10BQ060
Motorola: MBR0540T1
Pulse: T1124 (0°C to +70°C)
Pulse: T1114 (-40°C to +85°C)
Common decoupling for all eight channels is 68 F.
Recommended decoupling per channel is 0.1 F.
Common decoupling for all eight channels is 68 F.
Common decoupling for all eight channels is 0.1 F.
When in external impedance mode, Rx capacitance for all eight
channels is 0.1 F. Do not populate if using internal impedance
mode.
When in external impedance mode, the two resistors for all modes
are 15.0 ±1%. Do not populate if using internal impedance mode.
SGS-Thomson: SMLVT 3V3 (3.3V transient suppressor)
Tx Protection
Dt
Rx Transformer 1:2
Tx Transformer 1:2
Tx Decoupling (ATVDD)
Tx Decoupling (ATVDD)
Rx Decoupling (AVDDn)
Rx Decoupling (AVDDn)
TFr
TFt
C1
C2
C3
C4
Rx Termination
C5
Rx Termination
Rt
Voltage Protection
TVS1
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DS26303L-75+ 功能描述:電信線路管理 IC 3.3V E1/T1/J1 Short Haul Octal LIU RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray
DS26303L-75+A3 功能描述:電信線路管理 IC 3.3V E1/T1/J1 Short Haul Octal LIU RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray
DS26303L-75A3 功能描述:電信線路管理 IC 3.3V E1/T1/J1 Short Haul Octal LIU RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray
DS26303LN-120 功能描述:電信線路管理 IC RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray
DS26303LN-120+ 功能描述:電信線路管理 IC 3.3V E1/T1/J1 Short Haul Octal LIU RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray