MH88422(1995) Просмотр технического описания (PDF) - Mitel Networks
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MH88422 Datasheet PDF : 12 Pages
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MH88422
Preliminary Information
Absolute Maximum Ratings* - All voltages are with respect to AGND unless otherwise specified.
Parameter
Symbol
Min
1 DC Supply Voltage
VDD
-0.3
2 Storage Temperature
TS
-55
3 DC Loop Voltage
VBat
-100
4 Ringing Voltage
VR
-
5 Loop Current
ILoop
-
* Exceeding these values may cause permanent damage. Functional operation under these conditions is not implied
Max
6
+80
+100
120
90
.
Units
V
°C
V
VRMS
mA
Recommended Operating Conditions.
Parameters
Sym Min
1 DC Supply Voltages
2 Operating Temperature
3 Ringing Voltage
VDD
4.5
TOP
0
VR
Typ‡
5.0
75
Max
5.5
70
Units
V
°C
VRMS
Test Conditions
VBat=-48V
‡ Typical figures are at 25°C with nominal +5V supply and are for design aid only
Loop Electrical Characteristics*
Characteristics
Sym Min Typ‡
1 Ringing Voltage
-1 Variant only
No Detect VR
Detect
27
Ringing Voltage
All other Variants
No Detect VR
Detect
14
2 Ringing Frequency
15
3 On-Hook 2-wire Impedance
40k
Max
20
7
68
Units
Test Conditions
VRMS
VRMS
VRMS
VRMS
Hz
Ω
Refer to FT2 1TR2 for test
method
Externally
Adjustable
1kHz
4 Operating Loop Current
15
80 mA
5 Operating Loop Resistance
2800 Ω
6 Off-Hook DC
Voltage
-1 Variant
6.0
6.0
-2 Variant
4.0
4.0
-3 Variant
6.0
6.0
9.6
V
15
V
6.0
V
7.8
V
9.0
V
12.5 V
7 Leakage Current (2-Wire to AGND)
10
µA
8 Leakage Current on Hook
(Tip to Ring)
9
10
µA
9 DC Resistance during dialling
-1 variant only
200 220
Ω
10 Dial Pulse Distortion
-1 Variant
All other Variant
ON
OFF
0
+2
+4
ms
+6 +8 +10 ms
0
+2
+4
ms
* 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.
VBat=-48V, ILoop=15mA
ILoop=25mA
ILoop=42mA
ILoop=15-20mA
ILoop=26mA
ILoop=25mA
ILoop=42mA
100VDC
VBat=-50V
ILoop=20-40mA
2-24
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