MH88422
Preliminary Information
.
Absolute Maximum Ratings* -
All voltages are with respect to AGND unless otherwise specified.
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
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 supply and are for design aid only
Loop Electrical Characteristics*
Characteristics
1
Sym
VR
Min
27
Typ
‡
Max
20
7
Units
V
RMS
V
RMS
V
RMS
V
RMS
Hz
Ω
Test Conditions
Refer to FT2 1TR2 for test
method
Externally
Adjustable
Ringing Voltage
-1 Variant only
Ringing Voltage
All other Variants
No Detect
Detect
No Detect
Detect
VR
14
15
40k
15
2
3
4
5
6
Ringing Frequency
On-Hook 2-wire Impedance
Operating Loop Current
Operating Loop Resistance
Off-Hook DC
Voltage
-1 Variant
-2 Variant
-3 Variant
68
1kHz
80
2800
mA
Ω
V
V
V
V
V
V
µA
µA
V
Bat
=-48V, I
Loop
=15mA
I
Loop
=25mA
I
Loop
=42mA
I
Loop
=15-20mA
I
Loop
=26mA
I
Loop
=25mA
I
Loop
=42mA
100V
DC
V
Bat
=-50V
6.0
6.0
4.0
4.0
6.0
6.0
9.6
15
6.0
7.8
9.0
12.5
10
9
10
7
8
9
10
Leakage Current (2-Wire to AGND)
Leakage Current on Hook
(Tip to Ring)
DC Resistance during dialling
-1 variant only
Dial Pulse Distortion
-1 Variant
All other Variant
ON
OFF
0
+6
0
200
+2
+8
+2
220
+4
+10
+4
Ω
ms
ms
ms
I
Loop
=20-40mA
* Loop Electrical Characteristics are over recommended operating conditions unless otherwise stated.
‡ Typical figures are at 25°C and are for design aid only.
Note 1: All of the above characteristics use a test circuit as per Figure 3.
2-24
MITEL [ MITEL NETWORKS CORPORATION ]
