參數(shù)資料
型號(hào)： 73M1922-DB
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 63/82頁(yè)
文件大?。?/td> 0K
描述： BOARD DEMO 73M1922 20-TSSOP
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 1
主要目的： *
嵌入式： 否
已用 IC / 零件： *
主要屬性： *
次要屬性： *
已供物品： 板，CD
73M1822/73M1922 Data Sheet
DS_1x22_017
66
Rev. 1.6
Function
Mnemonic
Register
Location
Type
Description
DCIV
0x13[7:6]
WO
DC Current Voltage Characteristic Control
Hold state with ENDC and ENAC=1, 20 mA DC loop current except if the
DC-IV curve is shifted to a value given by these bits. This assumes that
there is a 5:1 attenuation of off-hook.
DCIV1
DCIV0
Description
0
DC Loop On Voltage of 0.73V
(5.60 V at Tip/Ring assuming a 5:1
step down of off-hook voltage)
0
1
DC Loop On Voltage of 0.977 V
(6.75 V at Tip/Ring assuming a 5:1
step down of off-hook voltage)
1
0
DC Loop On Voltage of 1.232 V
(7.65 V at Tip/Ring assuming a 5:1
step down of off-hook voltage)
1
DC Loop On Voltage of 1.488 V
(9.35 V at Tip/Ring assuming a 5:1
step down of off-hook voltage)
*seize state with ENDC=1 and ENAC=0, 20 mA loop current.
xx=DC Loop On Voltage of 0.281V (3.9 V at Tip/Ring assuming 5:1 step
down of off-hook voltage)
Current Limiting Detection Control and Status
ILM
0x13[5]
WO
Current Limit Enable
This control enables or disables loop current limit.
0 = No current limit. (Default)
1 = 42 mA current limit enabled.
ILMON
0x1E[7]
R
Current Limit Mode On
This status bit is effective only when the ILM bit is set to 1.
0 = Loop current is lower than 42 mA.
1 = Loop current is higher than 42 mA and the current limiting mode is
active.
THDCEN
0x13[4]
W
Enables the cancellation of AC signals within DCGM circuit
0 = Disables AC cancellation.
1 = Enables the cancellation of AC from DCGM circuit.
ATEN
0x16[4]
W
Active Termination Loop Enable
Enables or disables Active Termination Loop.
0 = Disable. (Default)
1 = Enable Active Termination Loop.
Normal operation requires this bit to be set to always enable a termination
circuit.
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