Page 1
MH80625C
Protection SIP
Preliminary Information
Features
• 2 x 5.5 ohm high pow er, high voltage, t hick fi lm
protection resistors
• 2 replacea ble 2AG fuses i n surfa ce-mo unte d
fuse clips
Applications
• Protection circuit for the MH89625C OPS SLIC
• Protection circuit for analog line interfaces,
power suppl ies, et c.
Description
The MH80625C hybrid SIP provides a protection
circuit consisting of two 2AG size fuses in surfacemounted fuse clips and two high voltage, high power
resisto rs.
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.
ISSUE 2 April 1995
Ordering Information
MH80625C 10 Pin SIL Package
0°C to 70°C
TIN
RIN
F1
F2
Figure 1 - Functional Block Diagram
R1
TOUT
R2
ROUT
2-3
Page 2
MH80625C Preliminary Information
IC
NC
RIN
NC
TOU T
ROUT
NC
TIN
NC
IC
1
2
3
4
5
6
7
8
9
10
Figure 2 - Pin Connections
Pin Description
Pin # Name Description
1ICInternal Connection .
2NCNo Connection.
3RINRin g In p u t : Connects to Ring conductor of the Subscriber Loop.
4NCNo Connection.
5TOUTTip Output: Connects to Tip conductor of the SLIC.
6ROUTRing Output: Connects to Ring conductor of the SLIC.
7NCNo Connection.
8TINTip Input : Connects to Tip conductor of the Subscriber Loop.
9NCNo Connection.
10 IC Internal Connection .
2-4
Page 3
Preliminary Information MH80625C
Electrical Characteristics 0°C to 70 ° C
Characteristi cs Symbol Min Typ* Max Units Test Conditions
1 Resistance - absolute R1 4.5 5.5 6 Ω
2 Resistance - absolute R2 4.5 5.5 6 Ω
3 Resistance - match 1 % Match bet ween R1 &
R2
4 Fuse F1 0.25 Amps Littlefuse 2AG,
250VAC P/N 229.250
Slow Bl o w
5 Fuse F2 0.25 Amps Littlefuse 2AG,
250VAC P/N 229.250
Slow Bl o w
* Typical figures are at 25°C and are for design aid only.
Reference
Specificati on
Test Descripti on Performan ce Commen ts
1 CCITT K.20 Lightning Surge
Simulation
1kV
10 x 700
µsec
2 CCITT K.20 Power Induction 300 Vrms
200 msec
3 CCITT K.20 Power Cross 220 Vrms
15 min
Note 1: Refer to CCITT K.20 specification for details of tests.
MDF
PRIMARY
TIP
RING
PROTECTION
TIN
8
RIN
3
SECONDARY
PROTECTION
F1
F2
R1
MH80625C
R2
No damage
No arcing, fuse intact
No damage
No arcing, fuse intact
No damage
No arcing, fuse blows
TOUT
5
RING
RELAY
6
ROUT
See Note 1
See Note 1
See Note 1
MH89625C
TIP
1
TISP
3082
2
RING
P6KE39C
90 VRMS
-V
BAT
25Hz
Figure 3 - Applicatio n Circui t - Secon dary Prote ctio n
7
RF2
6
RF1
2-5
Page 4
MH80625C Preliminary Information
0.34 MAX
1.0 + 0.020
0.5)
0.01 MIN
(0.25)
0.7 +
(17.8 +
0.02 0
0.5)
(25.4 +
FUSE AREA
FUSE AREA
Notes:
1) Not to scale
2) Dimensions in inches).
3) (Dimensions in millimetres).
*Dimensio ns to centre of pin &
tolerance non accumulative.
1
123456
0.05 +
0.01
0.5)
(1.3 +
***
0.05 +
0.02
(1.225 +
0.020 +
0.05)
Figure 4 - Mechanic al Data
(0.51 +
0.005
0.13)
10
0.100 +
(2.54 +
0.010
0.26)
0.18 +
(4.6 +
0.02
0.5)
2-6
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