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PDF MH88610 Data sheet ( Hoja de datos )
| Número de pieza | MH88610 | |
| Descripción | Subscriber Line Interface Circuit (SLIC) Preliminary Information | |
| Fabricantes | Mitel Networks | |
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MH88610
® 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
• Loop length detection
• Constant current feed
Applications
Line interface for:
• PABX
• Intercoms
• Key Telephone Systems
• Control Systems
ISSUE 6
April 1995
Ordering Information
MH88610
20 Pin SIL Package
0°C to 70°C
Description
The Mitel MH88610 Subscriber Line Interface Circuit
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, loop length 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
LPGND
VBat
VDD VEE GNDA
Current &Voltage
Sensing
Constant
Current
Feed
Over Current
Protection
2-Wire to
4-Wire
Conversion
Loop
Supervision
Figure 1 - Functional Block Diagram
VR
VX
VRef
LOOP
SHK
CAP
2-97
1 page  
Preliminary Information
MH88610
Absolute Maximum Ratings*
Parameter
Symbol
Min
Max Units
1 DC Supply Voltage
LPGND=GNDA
2 Storage Temperature
3 Package Power Dissipation
VDD +15
VEE -15
VBat
-60
TS -40 100
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
Parameter
Sym
Min
Typ† Max
Units Comments
1 Operating Supply Voltage
VDD 4.75 5.0 5.25
VEE -5.25 -5.0 -4.75
VRef
-23
-11
VBat
-28
2 Operating Temperature
TO 0
70
† Typical figures are at 25°C and are for design aid only.
V
V
V
V
°C
DC Electrical Characteristics† - Voltages are with respect to GNDA unless otherwise stated.
Characteristics
Sym Min Typ‡ Max
Units Test Conditions
1 Supply Current
2 Power Consumption
VDD
VEE
IDD
IEE
PC
64 7.6
-3.4 -5.0
212
1110
mA
mA
mW Standby
mW Active
3 Constant Current Line Feed
4 Operating Loop Resistance
5 Off-Hook Threshold
6 Ring Ground Over-Current
protection
ILoop
RLoop
24 26
800
1200
33
28
42
mA
Ω VBat = -28V
Ω VBat = -28V
mA
7 Output High Voltage
Loop (On-hook)
8 Output High Source Current
Loop (on-hook)
9 Output Low Voltage
SHK
Loop (off-hook)
VDD-2
15
VEE
1.9
VDD V No Load
mA RLOOP = 2.5V
VEE+1.5 V 10kΩ pull-up to 5V
2.4 V No Load
10 Output Low Sink Current
SHK
Loop (off-hook)
6 16
10 20
mA V SHK = 1.5V
mA VLoop = 2.5V
† DC Electrical Characteristics are over recommended operating supply voltages.
‡ Typical figures are at 25°C with nominal +5V supplies and are for design aid only.
2-101
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet MH88610.PDF ] | |
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