MH89626C
Loop Electrical Characteristics*
Characteristics
1
Maximum AC Ringing
Current Rejection
Ring Trip Detect Time
y
Hook Switch Detect Time:
Off-Hook to On-Hook
On-Hook to Off-Hook
Operating Loop Current
Operating Loop Resistance
Loop Current at Off-Hook
z
Detect Threshold
I
IP
R
IP
I
sh
18
0
0
7
10
22
Sym
Min
33
Typ
†
Max
Preliminary Information
Units
mA
Test Comments
25Hz, V
Bat
= -48V
2
3
100
125
20
20
50
1900
2300
13
ms
ms
ms
mA
Ω
Ω
mA
LCA = Adjustable
V
Bat
= -39.8V
V
Bat
= -48V
4
5
6
* Loop 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.
x
The SLIC can be loaded with an AC impedance as low as 4000Ω without generating a false SHK output. Since each REN represents
8kΩ, the SLIC can drive a REN of 2 without generating a false SHK output.
y
This parameter is over Recommended Operating Conditions as well as the specified Operating Loop Resistance.
z
Off-Hook Detect (SHK) will be detected for loop lengths of 2900Ω or less.
AC Electrical Characteristics*
Characteristics
1
2- Wire input
(200Ω + 560Ω
// 0.1µF) −2
Variant
(200Ω + 680Ω
// 0.1µF) −4
Variant
Return Loss at 2-Wire
Sym
Z
in
720
813
14
18
14
40
46
16
20
16
PSRR
20
20
20
40
30
40
dB
dB
dB
51
40
32
65
65
36
24
24
Min
Typ
†
Max
Units
Ω
Ω
dB
dB
dB
dB
dB
dB
dB
dB
Test Comments
1020 Hz
1020 Hz
300 Hz
500-2000 Hz
3400 Hz
300-600 Hz
600-3400 Hz
300 Hz
500-2500 Hz
3400 Hz
Ripple 50mV
1020 Hz
2
3
4
Longitudinal to Metallic Balance
Transhybrid Loss
5
Power Supply Rejection Ratio
at 2-wire and Do:
V
DD
V
EE
V
Bat
* 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.
2-290
MITEL [ MITEL NETWORKS CORPORATION ]
