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PDF MH88612K Data sheet ( Hoja de datos )
| Número de pieza | MH88612K | |
| Descripción | Subscriber Line Interface Circuit Preliminary Information | |
| Fabricantes | Mitel Networks | |
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MH88612K
®
Subscriber Line Interface Circuit
Preliminary Information
Features
• Input impedance 600 Ω
• Transformerless 2-wire to 4-wire conversion
• Battery and ringing feed to line
• Off-hook and dial pulse detection
• Ring ground over-current protection
• Adjustable constant current feed
• Relay drive output with diode protection
• Power Denial
• Wide VBAT Operating Range
• Tip/Ring Reversal
Applications
Line interface for:
• PABX
• Intercoms
• Key Telephone Systems
• Control Systems
ISSUE 3
April 1995
Ordering Information
MH88612K 30 Pin SIL Package
0°C to 70°C
Description
The SLIC provides a complete interface between a
switching system and subscriber loop. Functions
provided include battery feed, ringing feed and tip-
ring reversal to the subscriber line, 2-Wire to 4-Wire
hybrid interfacing, constant current feed and dial
pulse detection. The device is fabricated as a thick
film hybrid using various technologies.
RF
TF
TIP
RING
RC2
VRLY
RD1
RC1
LPGND
VBat PD
VDD VEE GNDA
T/R
Reverse
T/R Reverse
Relay Driver
Relay
Drive
Circuit
Battery
Feed
Power
Denial
Over Current
Protection
Constant
Current
Feed
2-Wire to
4-Wire
Conversion
Loop
Supervision
RV
Figure 1 - Functional Block Diagram
SHK
VR
VX
VRef
CAP
2-121
1 page  
Preliminary Information
MH88612K
Absolute Maximum Ratings*
Parameter
Symbol
Min
Max Units
1 DC Supply Voltage
VDD -0.3 +15
VEE +0.3 -15
VBat 0.3 -60
2 Storage Temperature
TSTG -40 100
3 Package Power Dissipation
PD
2
* Exceeding these values may cause permanent damage. Functional operation under these conditions is not implied.
V
V
V
°C
W
Recommended Operating Conditions
Characteristics
Sym Min Typ† Max Units
Comments
1 Operating Supply Voltage
VDD 4.75 5.0 5.25
VEE -4.75 -5.0 -5.25
VRef
0
VBat -27 -48 -60
VRLY
5
2 Operating Temperatures
TO 0
70
† Typical figures are at 25°C and are for design aid only.
V
V
V
V
V
°C
Adjustable
2-125
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet MH88612K.PDF ] | |
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