MH88620BR データシートの表示（PDF） - Mitel Networks
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MH88620BR Datasheet PDF : 14 Pages
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Preliminary Information
MH88620BR
AC Electrical Characteristics*
Characteristics
1 Analog Tx Gain (T-R to TX)
2 Analog Rx Gain (RX to T-R)
3 Ringing Capability
4 On-hook Transmission
Signal input level
Gain
5 SHK Rise Time
Fall time
6 2 Wire Termination Impedance
7 Off-Hook Detect Threshold
8 2-Wire Return Loss
900Ω at T-R
Zin = 900Ω
900Ω + 2.16µF at T-R
Zin = 900Ω
Sym
tR
tF
Min Typ‡
0
0
25
Max
Units
dB
dB
VRMS
Test Comments
Externally adjustable
Externally adjustable
RLoop = 1400Ω
Term. 6.8µF +200Ω
2.0
VRMS VBat = -48V
4
8
dB T-R load = 10Ωk min.
1
msec Dial Pulse Detection
1
msec
900
Ω Adjustable
10
mA
20
dB 300-500Hz
26
dB 500-2500Hz
20
dB 2500-3400Hz
14
dB 300Hz
18
dB 600-2000Hz
14
dB 3400Hz
9 Longitudinal Balance
Longitudinal to Metallic
10 Longitudinal Current Capability
11 Idle Channel Noise
Rx to T-R
T-R to Tx
12 Transhybrid Loss
58
dB 2000Hz, 1000Hz
55
dB 2000Hz, 3000Hz
53
dB 3400Hz
40
mA 20mA per lead
NCR
8
dBrnc
NCX
12
dBrnc
THL
Tx gain 0dB
Rx gain 0dB
16
dB 300-500Hz
20
dB 500-2500Hz
16
dB 2500-3400Hz
13
14 Analog Signal Overload Level at
TIP and RING
15 Ringing Signal Voltage
16 Ringing Frequency
70 80
20 25
T-R = 900Ω
4
dBm VBat = -48V
90
VRMS
30
Hz
17 Ring Trip Delay
100
ms
18 Absolute Gain variation
-25
0
+.25
dB 0dBm at T-R, 1kHz
19 Relative Gain, reference to 1kHz
-2
0
+.2
dB 300-3400Hz
20 Power Supply Rejection Ratio
VBat
VDD
VEE
PSRR
24 30
24 30
24 30
dB 1kHz, 100mVpp
* AC 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: Test Conditions use a transmit and receive gain set to 0dB default and a Zin value of 900Ω unless otherwise stated.
“Ref” indicates reference impedance which is equivalent to the termination impedance.
“Net” indicates network balance impedance.
2-149
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