MH88435-P Ver la hoja de datos (PDF) - Mitel Networks
Número de pieza
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MH88435-P Datasheet PDF : 16 Pages
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MH88435-P
Preliminary Information
.
Absolute Maximum Ratings* - All voltages are with respect to AGND unless otherwise specified.
Parameter
Sym Min Max Units
Comments
1 DC Supply Voltage
VCC
-0.3
6
V
2 Storage Temperature
TS
-55 +125
˚C
3 DC Loop Voltage
VBAT -110 +110
V
4 Ringing Voltage
VR
150
Vrms VBAT = -56V
5 Loop Current
ILoop
90
mA
6 Ring Trip Current
ITRIP
180
mArms 250ms 10% duty cycle or
500ms single shot
*Exceeding these values may cause permanent damage. Functional operation under these conditions is not implied.
Recommended Operating Conditions
Parameter
Sym Min Typ‡ Max
1 DC Supply Voltages
2 Operating Temperatures
Industrial Temperature
VCC 4.75 5.0 5.25
TOP
0
25 70
-40
+85
3 Ringing Voltage
VR
75 90
‡ Typical figures are at 25˚C with nominal +5V supply and are for design aid only
Units
V
˚C
Vrms
Test Conditions
Loop Electrical Characteristics † -
Characteristics
Sym Min Typ‡ Max Units
Test Conditions
1 Ringing Voltage threshold
VR
Externally Adjustable
7
10 14 Vrms
2 Ringing Frequency
15
68
Hz
3 Operating Loop Current
15
80 mA Note 3
4 Off-Hook DC Voltage
Tip/Ring
5 Leakage Current
(Tip or Ring to AGND)
Test circuit as Fig. 4
6.0
V
ILoop=15mA )Note 1
6.0
V
ILoop=20mA )where R2
7.8
V
=ILoop=26mA ) 360kΩ
10
µA 100V DC Note 2.
7
mA 1000V AC
rms
6 Leakage Current on-hook
(Tip to Ring)
9
10
µA VBAT = -50V
7 Dial Pulse Delay
ON
OFF
0
+2 +4
ms
0
+2 +4
ms
8 Loop Condition Detect Threshold
5
16
Voltage across tip and
Off-Hook
V ring
†Electrical Characteristics are over Recommended Operating Conditions unless otherwise stated.
‡Typical figures are at 25°C with nominal + 5V supplies and are for design aid only.
Note 1: Refer to EIA/TIA 464 section 4.1.1.4.4.
Note 2: This is equivalent to 10MΩ leakage Tip/Ring to Ground. For countries requiring 100MΩ leakage use the MH88436 with an
enhanced leakage specification.
Note 3: Operation at low loop currents depends on the DC programming resistor between VLoop1/2. The recommended 360K value
will support V34 operation down to 20mA. Voice operation is supported down to 15mA.
2-46
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