MH88435-P
Preliminary Information
.
Absolute Maximum Ratings* -
All voltages are with respect to AGND unless otherwise specified.
Parameter
1
2
3
4
5
6
DC Supply Voltage
Storage Temperature
DC Loop Voltage
Ringing Voltage
Loop Current
Ring Trip Current
Sym
V
CC
T
S
V
BAT
V
R
I
Loop
I
TRIP
Min
-0.3
-55
-110
Max
6
+125
+110
150
90
180
Units
V
˚C
V
Vrms
mA
mA
rms
250ms 10% duty cycle or
500ms single shot
VBAT = -56V
Comments
*Exceeding these values may cause permanent damage. Functional operation under these conditions is not implied.
Recommended Operating Conditions
Parameter
1
2
3
DC Supply Voltages
Operating Temperatures
Industrial Temperature
Ringing Voltage
Sym
V
CC
T
OP
V
R
Min
4.75
0
-40
Typ
‡
5.0
25
75
Max
5.25
70
+85
90
Units
V
Test Conditions
˚C
Vrms
‡ Typical figures are at 25˚C with nominal +5V supply and are for design aid only
Loop Electrical Characteristics
† -
Characteristics
1
2
3
4
Ringing Voltage threshold
Ringing Frequency
Operating Loop Current
Off-Hook DC Voltage
Tip/Ring
Sym
VR
7
15
15
10
14
68
80
6.0
6.0
7.8
10
7
9
ON
OFF
0
0
5
+2
+2
10
+4
+4
16
V
Vrms
Hz
mA
V
V
V
µA
mA
rms
µA
ms
ms
Voltage across tip and
ring
Note 3
Test circuit as Fig. 4
I
Loop
=15mA )Note 1
I
Loop
=20mA )where R2
=I
Loop
=26mA ) 360kΩ
100V DC Note 2.
1000V AC
V
BAT
= -50V
Min
Typ
‡
Max
Units
Test Conditions
Externally Adjustable
5
Leakage Current
(Tip or Ring to AGND)
Leakage Current on-hook
(Tip to Ring)
Dial Pulse Delay
Loop Condition Detect Threshold
Off-Hook
6
7
8
†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
MITEL [ MITEL NETWORKS CORPORATION ]
