CPC1465
1.5 Application Signalling Characteristics
These tests assume crowbar protection across the
CPC1465 limiting peak potentials to 250 V.
1.5.1 LED Trigger Characteristics During MLT Signalling
For test conditions: (see Figure 9 on page 9).
Parameter
Applied ac Voltage
Conditions
Symbol Minimum
Typical Maximum
Unit
V
-
-
-
-
-
-
-
-
60
2
-
-
-
-
62
3
PEAK
Hz
-
Applied ac frequency
Number of half-cycles applied
Total loop resistance
6
10
900
4500
Ω
Required opto-coupler response
Number of pulses per half-cycle applied
Pulse width (opto on)
-
-
-
1
-
-
-
-
-
T
(see Figure 9 on page 9)
(see Figure 9 on page 9)
10
10
ms
ms
ON
T
Pulse width (opto off)
-
OFF
1.5.2 LED Trigger Characteristics During Dial Test Set Signalling
For test conditions: (see Figure 9 on page 9).
Parameter
Conditions
Symbol Minimum
Typical Maximum
Unit
V
Applied dc battery Voltage
Frequency (pulses per second)
Percent break
-
-
-
-
-
-
-
-
-
-
-43.5
4
-
-
-
-
-
-56
8
DC
-
40
60
%
-
Number of pulses
6
10
Total Loop Resistance
Required opto-coupler response
200
4000
Ω
Number of pulses per make/break
applied
-
-
-
1
-
-
T
Pulse width (opto on)
Pulse width (opto off)
(see Figure 9 on page 9)
(see Figure 9 on page 9)
10
10
-
-
-
-
ms
ms
ON
T
OFF
8
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