73M1866B-IFX Maxim Integrated Products, 73M1866B-IFX Datasheet - Page 65
73M1866B-IFX
Manufacturer Part Number
73M1866B-IFX
Description
KIT EVALUATION FOR 73M1866B
Manufacturer
Maxim Integrated Products
Specifications of 73M1866B-IFX
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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DS_1x66B_001
The 73M1x66B can:
•
•
The 73M1x66B meets a wide range of different countries’ requirements under software control. See
Section 10.7.
There are two operating states for the DC-IV circuits: Hold and Seize.
The Hold state is the nominal operational point for the DC-IV circuits. The response shown in Figure 34
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 DCIV control bits. See Figure 35 and the description of the DCIV bits in
Section 10.6.
Rev. 1.6
Shift the characteristics by setting the turn-on voltage.
Enable a current limit of 42 mA.
14
12
10
8
6
4
2
0
5
Figure 34: Tip-Ring Voltage versus Current Using Different DCIV Settings
9
15
20
30
40
DC Current, mA
DCVI Performance
50
60
70
80
73M1866B/73M1966B Data Sheet
90
96
110
DCIV=00
DCIV=01
DCIV=10
DCIV=11
65
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