MH88634 데이터 시트보기 (PDF) - Mitel Networks
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MH88634 Datasheet PDF : 8 Pages
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Preliminary Information
MH88634
Loop Electrical Characteristics*
Characteristics
Symbol Min
1 Ringing Voltage
2 Ringing Frequency
VR
40
16
3 Ringer Equivalence Number
REN
0.5
Typ†
90
20
1
Max
110
33
2
Units
Vrms
Hz
4 Operating Loop Current
5 Off-Hook DC Resistance
6 Leakage Current (Tip-Ring to
AGND)
7 FL Threshold
Tip-Ring (On-hook)
Tip-ring Current (Off-Hook)
8 RL Threshold
Tip-Ring (On-Hook)
Tip-Ring (Off-Hook)
16
70
mA
270 280
Ω
10
mA
+30
+10 †
-30
-8 †
+40
Vdc
15
mA
-40
Vdc
-15
mA
* DC Electrical Characteristics are over recommended operating conditions unless otherwise stated.
† Typical figures are at 25°C and are for design aid only.
Test Conditions
Dummy ringer is 17K in
series with 330nF.
Type A ringing
@ 20mA
@ 1000Vac
LRC = 0v
LRC = 5V
LRC = 0v
LRC = 5V
AC Electrical Characteristics *
Characteristics
Symbol Min
1 2-wire Input Impedance (-2
variant)
2 Return Loss at 2-wire
(Zin = Ref = 600)
3 Longitudinal to Metallic
Balance
4 Transhybrid Loss
5 Gain (voltage) 2 wire to Tx
6 Gain (Voltage)
Rx to 2 wire
Zin
RL
20
58
58
53
THL
20
7 Input impedance at Rx
8 Output impedance at Rx
9 Signal Overload Level
at 2-wire output
at Tx
10 Total Harmonic Distortion
at 2-wire output
at Tx
10
THD
4.0
0.95
Typ†
600
0
-2
5
Max Units
Ω
dB
dB
dB
dΒ
dB
kΩ
Ω
dBm
Vrms
1.0
%
1.0
%
11 Idle Channel Noise
NC
at 2-Wire
at Tx
dBrnC
15
15
12 Power Supply Rejection Ratio PSRR
at 2-wire and Tx
VDD
25 dB
dB
VEE
25 dB
dB
* AC Electrical Characteristics are over recommended operating conditions unless otherwise stated.
† Typical figures are at 25°C and are for design aid only.
Test Conditions
200-3400 Hz
200Hz
1000Hz
3.4kHz
200-3400Hz
1024Hz
Spec Freq
% THD < 5%
Ref 600Ω @ 20mA
Input 0.5V, 1kHz @ Rx
Input 0.5V, 1kHz @
Tip-Ring
Ripple 0.1V, 1kHz
2-257
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