MH88617
Relay Driver
An open collector output is provided as a driver for
an external relay. Applying 5V to the RDI pin will
cause the RDO pin to sink current to ground. A
flyback diode must be connected across the relay
coil to protect this output.
The DC resistance of the relay coil must exceed
230Ω
Advance Information
Mechanical Data
See Figure 11, 12, 13, and 14 for details of the
mechanical specification.
Line Conditions
Line
Impedance
600Ω
600Ω
600Ω
370Ω+620Ω/
/310nF
220Ω+820Ω/
/115nF
900Ω
270Ω+750Ω/
/150nF
Balance
Impedance
600Ω
600Ω
350Ω+1KΩ
//210nF
370Ω+620Ω
//310nF
220Ω+820Ω
//115nF
900Ω
270Ω+750Ω
//150nF
VX
Gain
0dB
4dB
0dB
0dB
0dB
0dB
0dB
VR
Gain
0dB
-4dB
0dB
0dB
0dB
0dB
0dB
Z1
30k
30k
60k//30k
Programming Components
Z2
18k + 18k T
470pF
28k5 + 28k5 T
330pF
18k + 18k T
(10k3+5.3nF)
18k + 18k T
100pF
36k
18k+18k T
330pF
R1
36k
57k
36k
36k
36k
36k
36k
R2
110k
180k
110k
(124k//1.5nF)
+ 64k
(164k//550pF)
+ 34k
174k
(150k//760pF)
+ 48k5
40k//(1.2nF+ 32k5)
41k//(630pF+3k)
38k9
40k3//(11k5+730pF)
18k+18k T
100pF
Table 1 - External Programming Components
Note: The programming component values shown, give the optimum performance in terms of gain accuracy, return loss and THL. A
compromise is these values can be made if a reduction in performance is acceptable.
2-162
MITEL [ MITEL NETWORKS CORPORATION ]
