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PDF MH88612 Data sheet ( Hoja de datos )
| Número de pieza | MH88612 | |
| Descripción | Subscriber Line Interface Circuit (SLIC) Preliminary Information | |
| Fabricantes | Mitel Networks | |
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MH88612
®
Subscriber Line Interface Circuit (SLIC)
Preliminary Information
Features
• 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
• Power VBat Denial
• Wide operating range
Applications
Line interface for:
• PABX
• Intercoms
• Key Telephone Systems
• Control Systems
ISSUE 4
Ordering Information
MH88612 20 Pin SIL Package
April 1995
0°C to 70°C
Description
The SLIC provides a complete interface between a
switching system and a subscriber loop. Functions
provided include battery feed and ringing feed to the
subscriber line, 2-Wire to 4-Wire hybrid interfacing,
constant current feed and dial pulse detection. The
device is fabricated using thick film hybrid
technology in a 20-pin single in-line package.
TF
TIP
RING
RF
RV
VRLY
RC
RD
CD
LPGND
VBat
PD
Power
Denial
Current & Voltage
Sensing
VDD VEE AGND
2-Wire to
4-Wire
Conversion
Relay
Drive
Circuit
Constant
Current
Feed
Over Current
Protection
Loop
Supervision
FIgure 1 - Functional Block Diagram
SHK
VR
VX
VRef
CAP
2-105
1 page  
Preliminary Information
MH88612
Absolute Maximum Ratings*
Parameter
Symbol
Min
Max Units
1 DC Supply Voltage
LPGND = AGND
VDD 0.3 +15
VEE -15 +0.3
VBat -60 +0.3
VRLY -0.3 +40
VRef -60 +15
2 Storage Temperature
TS -40 100
3 Package Power Dissipation
PD
2
* Exceeding these values may cause permanent damage. Functional operation under these conditions is not implied.
Recommended Operating Conditions
V
V
V
V
V
°C
W
Parameter
Sym Min Typa Max Units
Comments
1 Operating Supply Voltage
VDD 4.75 5.0 5.25
V
VEE -4.75 -5.0 -5.25
V
VRef
0
V Adjustable
VBat -27 -48 -60
V
VRLY
5
V
2 Operating Temperature
TO 0
70 °C
a. Typical figures are at 25°C with nominal + 5V supplies and are for design aid only: not guaranteed and not subject to production testing.
2-109
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet MH88612.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
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