2-3
Features
2 x 5.5 ohm high power, high voltage, thick film
protection resistors
2 replaceable 2AG fuses in surface-mounted
fuse clips
Applications
Protection circuit for the MH89625C OPS SLIC
Protection circuit for analog line interfaces,
power supplies, etc.
Description
The MH80625C hybrid SIP provides a protection
circuit consisting of two 2AG size fuses in surface-
mounted fuse clips and two high voltage, high power
resistors.
The SIL hybrid, together with an external solid state
protector, provides full secondary protection for the
MH89625C Off-Premise SLIC, allowing conformance
to the requirements of CCITT K.20.
F1
F2
R1
R2
TIN
RIN
TOUT
ROUT
ISSUE 2
April 1995
Ordering Information
MH80625C 10 Pin SIL Package
0
C to 70
C
Figure 1 - Functional Block Diagram
MH80625C
Protection SIP
Preliminary Information
2-4
MH80625C
Preliminary Information
Figure 2 - Pin Connections
Pin Description
Pin #
Name
Description
1
IC
Internal Connection.
2
NC
No Connection.
3
RIN
Ring Input: Connects to Ring conductor of the Subscriber Loop.
4
NC
No Connection.
5
TOUT
Tip Output: Connects to Tip conductor of the SLIC.
6
ROUT
Ring Output: Connects to Ring conductor of the SLIC.
7
NC
No Connection.
8
TIN
Tip Input: Connects to Tip conductor of the Subscriber Loop.
9
NC
No Connection.
10
IC
Internal Connection.
1
2
3
4
5
7
8
9
10
6
IC
NC
RIN
NC
TOUT
ROUT
NC
TIN
NC
IC
2-5
Preliminary Information
MH80625C
Electrical Characteristics 0C to 70 C
* Typical figures are at 25C and are for design aid only.
Note 1: Refer to CCITT K.20 specification for details of tests
.
Figure 3 - Application Circuit - Secondary Protection
Characteristics
Symbol
Min
Typ*
Max
Units
Test Conditions
1
Resistance - absolute
R1
4.5
5.5
6
2
Resistance - absolute
R2
4.5
5.5
6
3
Resistance - match
1
%
Match between R1 &
R2
4
Fuse
F1
0.25
Amps
Littlefuse 2AG,
250VAC P/N 229.250
Slow Blow
5
Fuse
F2
0.25
Amps
Littlefuse 2AG,
250VAC P/N 229.250
Slow Blow
Reference
Specification
Test
Description
Performance
Comments
1
CCITT K.20
Lightning Surge
Simulation
1kV
10 x 700
sec
No damage
No arcing, fuse intact
See Note 1
2
CCITT K.20
Power Induction
300 Vrms
200 msec
No damage
No arcing, fuse intact
See Note 1
3
CCITT K.20
Power Cross
220 Vrms
15 min
No damage
No arcing, fuse blows
See Note 1
TIP
RING
RIN
TIN
TOUT
ROUT
F1
F2
R1
R2
MH80625C
RING
RELAY
TISP
3082
TIP
RING
RF2
RF1
MH89625C
P6KE39C
PROTECTION
PRIMARY
MDF
PROTECTION
SECONDARY
8
3
5
6
1
2
7
6
90 VRMS
25Hz
-V
BAT
2-6
MH80625C
Preliminary Information
Figure 4 - Mechanical Data
1.0 + 0.020
(25.4 + 0.5)
0.7 + 0.020
(17.8 + 0.5)
0.05 + 0.01
(1.3 + 0.5)
*
*
*
0.05 + 0.02
(1.225 + 0.05)
0.020 + 0.005
(0.51 + 0.13)
0.100 + 0.010
(2.54 + 0.26)
0.18 + 0.02
(4.6 + 0.5)
FUSE AREA
FUSE AREA
1
2
3
4
5
6
0.34 MAX
0.01 MIN
(0.25)
1
10
Notes:
1) Not to scale
2) Dimensions in inches).
3) (Dimensions in millimetres).
*Dimensions to centre of pin &
tolerance non accumulative.
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