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Application Note 9814
Stand Alone Con?guration
J5
J6
J10
J4
JP3
J7
JP9
J8
J9
JP7
J11
J3
HC55185 5
JP6
JP4
JP8
CODEC
APP CKT
J12
APP CKT
JP5
J2
JP1
JP2
JP11
JP12
JP10
J14
J1
S1 S2 S3
S4
S5
S6
CLOCK GENERATION & MUX
J15
FIGURE 3. STAND ALONE CONNECTORS AND JUMPERS
Description
The stand alone con?guration supports any measurement of
the HC55185 device. With all the jumper locations open, the
device is totally isolated from all other active circuitry on the
evaluation board. All other circuitry is powered, but does not
interfere with proper SLIC operation.
Power Supply Connections
Power should be applied to the evaluation board using the
primary power cable. Either J5 or J6 may be used. Prior to
applying power, the voltage setting of each supply should be
veri?ed. The power supplies should be turned off while
mating the primary power cable to the evaluation board.
Jumper Settings
All jumper positions should be open for the stand alone
con?guration.
Measurement Capability
Nearly all AC and DC parameters of the device can be
measured using this configuration. The device has been
socketed to allow easy measurements of more than a single
device. An extraction tool has been included with the
Status LEDs
The status LEDs DET and ALM are active for the stand
alone con?guration. DET should only light when a DC
current path exists from Tip to Ring or during forward loop
back. ALM should only light during forward loop back
operation. Normal device evaluations should not cause the
ALM indicator to light.
Uncommitted Switch Jumpers
When the jumpers JP1 and JP2 are installed, the
uncommitted switch is connected across Tip and Ring. The
test load of D TA and R TA will connect across the Tip and
Ring terminals when the uncommitted switch is turned on.
The DC load will result in DET transitioning to a logic low.
The circuit diagram is shown below.
TIP
JP2
RING
D TA
R TA
evaluation kit and should be used to remove the device from
JP1
SW+
the socket. The typical device measurements are listed below.
3. Power supply current per operating mode.
SW-
SWC
4. Tip and Ring DC voltages per operating mode.
5. On hook AC gains G 42 , G 24 and G 44 .
6. Off hook AC gains G 42 , G 24 and G 44 .
7. Other AC parameters such as longitudinal balance.
FIGURE 4. TEST LOAD SWITCHING
Socket Removal
The surface mount socket for the HC55185 device has the
same solder foot print as the PLCC package. Therefore, the
socket may be removed for more extensive characterization.
4-4
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相关代理商/技术参数
HC55185FCM 制造商:Rochester Electronics LLC 功能描述:75V RINGING SLIC WITH 53DB BAL FOR FXS - Bulk
HC55185FCMZ 功能描述:电信线路管理 IC 75V RINGING SLIC W/53DB BAL FOR FXS RoHS:否 制造商:STMicroelectronics 产品:PHY 接口类型:UART 电源电压-最大:18 V 电源电压-最小:8 V 电源电流:30 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VFQFPN-48 封装:Tray
HC55185FCMZ96 功能描述:电信线路管理 IC 75V RINGING SLIC W/53DB BAL FOR FXS RoHS:否 制造商:STMicroelectronics 产品:PHY 接口类型:UART 电源电压-最大:18 V 电源电压-最小:8 V 电源电流:30 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VFQFPN-48 封装:Tray
HC55185FCR 制造商:Rochester Electronics LLC 功能描述:- Bulk
HC55185FCRZ 功能描述:电信线路管理 IC SAME AS HC55185FCM EXCEPT MLF PKG RoHS:否 制造商:STMicroelectronics 产品:PHY 接口类型:UART 电源电压-最大:18 V 电源电压-最小:8 V 电源电流:30 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VFQFPN-48 封装:Tray
HC55185FCRZ96 功能描述:电信线路管理 IC 32LD MFLP 75V W/53DB VAL FOR FXS RoHS:否 制造商:STMicroelectronics 产品:PHY 接口类型:UART 电源电压-最大:18 V 电源电压-最小:8 V 电源电流:30 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VFQFPN-48 封装:Tray
HC55185GCM 制造商:Rochester Electronics LLC 功能描述:100V DB RINGING WITH GROUND START STATE - Bulk
HC55185GCMZ 功能描述:电信线路管理 IC 100V DB RINGING W/GROUND START STATE RoHS:否 制造商:STMicroelectronics 产品:PHY 接口类型:UART 电源电压-最大:18 V 电源电压-最小:8 V 电源电流:30 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VFQFPN-48 封装:Tray