MH88400
Parameter
1
2
3
4
5
DC Supply Voltage
Storage Temperature
DC Loop Voltage
Ringing Voltage
Loop Current
Symbol
V
DD
T
S
V
BAT
V
R
I
Loop
Preliminary Information
.
Absolute Maximum Ratings* -
All voltages are with respect to AGND unless otherwise specified.
Min
-0.3
-55
-100
-
-
Max
6
+80
+100
120
90
Units
V
°C
V
V
RMS
mA
* Exceeding these values may cause permanent damage. Functional operation under these conditions is not implied.
Recommended Operating Conditions
Parameters
1
2
3
DC Supply Voltages
Operating Temperature
Ringing Voltage
Sym
V
DD
T
OP
V
R
Min
4.5
0
75
Typ
‡
5.0
Max
5.5
70
Units
V
°C
V
RMS
V
BAT
=-48V
Test Conditions
‡ Typical figures are at 25°C with nominal +5V supplies and are for design aid only.
Loop Electrical Characteristics*
Characteristics
1
2
3
4
5
6
Ringing Voltage
Ringing Frequency
On-Hook 2-wire Impedance
Operating Loop Current
Operating Loop Resistance
Off-Hook DC
Resistance
-1 & -2 Variants
-3 Variant
7
8
9
10
Leakage Current (2-Wire to AGND)
Leakage Current on Hook
(Tip to Ring)
DC Resistance during dialling
-1 variant
Dial Pulse Distortion
ON
Off
0
9
200
220
+4
0
+8
+2
ms
ms
310
160
350
300
250
400
10
No Detect
Detect
Sym
VR
27
15
40k
80
4000
480
480
300
450
10
10
68
Min
Typ
‡
Max
20
Units
V
RMS
V
RMS
Hz
Ω
mA
Ω
Ω
Ω
Ω
Ω
µA
µA
Ω
V
BAT
=-48V, I
Loop
=10mA
I
Loop
=20mA
I
Loop
=40mA
I
Loop
=40mA
I
Loop
=20mA
100V
DC
V
BAT
=50V
I
Loop
=20-40mA
1kHz
Test Conditions
* Loop Electrical Characteristics are over recommended operating conditions unless otherwise stated.
‡ Typical figures are at 25°C and are for design aid only.
Note: All of the above characteristics use a test circuit as per Figure 3.
2-14
MITEL [ MITEL NETWORKS CORPORATION ]
