Preliminary Information
AC Electrical Characteristics
‡
Characteristics
1
2
3
4
TX Gain
RX Gain
Ringing Capability
On-Hook Transmission
Signal Input Level
Gain
External Signal Output Level
1.75
Sym
Min
Typ*
0
0
5
2.0
6
2.25
Max
Units
dB
dB
REN
V
rms
dB
V
rms
MH88625
Test Conditions
externally adjustable
externally adjustable
V
Bat
=-48V
T-R load = 10kΩ min.
V
Bat
= -48V, T-R load=
200Ω LCA=0V, Zo-600Ω,
Gain=0dB
Dial Pulse Detection
5
6
7
8
9
SHK Rise Time
Fall time
2-Wire Termination
Impedance
Off-Hook Detect Threshold
2-Wire Return Loss
t
R
t
F
1
1
600/
900
10
20
20
20
58
53
40
ms
ms
Ω
Selectable
mA
dB
dB
dB
dB
dB
mA
300 to 500Hz
500 to 2500Hz
2500 to 3400Hz
200-1000Hz
3400Hz
20mA per lead
10
Longitudinal Balance
Longitundinal to Metallic
Metallic to Longitudinal
Longitudinal Current
Capability
Idle channel Noise
Rx to T-R
T-R to Tx
N
CR
N
CX
THL
I
UB
11
12
8
12
22
40
10
4
90
17
100
+0.1
+0.05
33
dBrnC
dBrnC
dB
mA
dBm
Vrms
Hz
ms
dB
dB
dB
0dB at T-R, 1kHz
300-3400Hz
1kHz, 100mVpp
T-R=600Ω, VBat=-48V
200-3400Hz
13
14
15
16
17
18
19
20
21
Transhybrid Loss
Unbalanced Detect Threshold
Analog Signal Overload Level
at Tip and Ring
Ringing Signal Voltage
Ringing Frequency
Ring Trip Delay
Absolute Gain, Variation
Relative Gain, reference to
1kHz
Power supply Rejection Ratio
V
Bat
V
DD
V
EE
PSRR
24
24
24
‡ AC Electrical Characteristics are over recommended operating conditions unless otherwise stated.
* Typical figure are at 25°C with nominal +5V supplies and are for design aid only.
Notes: Impedance set by external network of 600Ω or 900Ω default.
External network for test purposes consists of 2200Ω + 8200Ω // 11.5nF between pins Z1 and Z2, the equivalent Z
in
has 1/10
th
the impedance and is equivalent o 220Ω+820Ω // 115nF.
Test condition uses a Z
in
value of 600Ω, 900Ω and the above external network.
Test conditions use a transmit and receive gain set to 0dB default and a Z
in
value of 600Ω unless otherwise stated.
“Ref” indicates reference impedance which is equivalent to the termination impedance.
“Net” indicates network balance impedance.
Refer to Table 1, 2 for TX, RX gain adjustment.
2-187
MITEL [ MITEL NETWORKS CORPORATION ]
