参数资料
型号: 73M1822-KEYCHN
厂商: Maxim Integrated Products
文件页数: 59/82页
文件大小: 0K
描述: BOARD KEYCHAIN 73M1822 42-QFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 1
主要目的: *
嵌入式: *
已用 IC / 零件: *
主要属性: *
次要属性: *
已供物品: 板,CD
73M1822/73M1922 Data Sheet
DS_1x22_017
62
Rev. 1.6
The 73M1x22 can:
Shift the characteristics by setting the turn-on voltage.
Enable a current limit of 42 mA.
The 73M1x22 meets a wide range of different countries’ requirements under software control. See Section
There are two operating states for the DC-IV circuits: Hold and Seize.
0
2
4
6
8
10
12
14
5
9
15
20
30
40
50
60
70
80
90
96
110
T
ip
/R
in
g
V
o
lt
ag
e
DC Current, mA
DCVI Performance
DCIV=00
DCIV=01
DCIV=10
DCIV=11
Figure 32: Tip-Ring Voltage versus Current Using Different DCIV Settings
The Hold state is the nominal operational point for the DC-IV circuits. The response shown in Figure 31 is
for the Hold state (both DC and AC transconductance circuits are enabled). The slope of the DC-IV
characteristics
is approximately 50 Ω when the series resistance of a typical PPTC resettable fuse is taken
into account.
The Seize state is a condition that is used by some central offices to determine an off-hook condition. In
this state an additional load is added to the nominal operational DC-IV characteristics used during the Hold
state
In the Seize state (only the DC transconductance circuit is enabled), the turn-on voltage is reduced on the
line independent of the DC-IV control bits. See the description of the DCIV bit in Section 11.6.
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