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PDF MH88520-1 Data sheet ( Hoja de datos )
| Número de pieza | MH88520-1 | |
| Descripción | German Subscriber Line Interface Circuit (SLIC) Preliminary Information | |
| Fabricantes | Mitel Networks | |
| Logotipo |  |
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MH88520-1
®
German Subscriber Line Interface Circuit (SLIC)
Preliminary Information
Features
• Differential to single ended conversion
• Transformerless 2-2 wire conversion
• Minimum installation space
• Off-Hook detection and LED indicator drive
• Relay drive output
• Battery and ringing feed to line
• Logic interface: MUTE, SHK, RRC
• Mute of incoming audio
• Dial pulse detection
• Voltage surge protection
• German complex input impedance
Applications
Line Interface for:
• Intercoms
• Key Systems
• PABX
ISSUE 4
Ordering Information
April 1995
MH88520-1 20 Pin SIL Package
0°C to 70°C
Description
The Mitel MH88520-1 German Subscriber Line
Interface Circuit provides a complete interface
between the telephone line and a speech switch
requiring only single bidirectional switch per
crosspoint. The functions provided by the
MH88520-1 include bidirectional differential to single
ended conversion in the speech path, line battery
feed, ringing feed and loop and dial pulse detection.
The device is fabricated as a thick film hybrid in a
20-pin ‘single-in-line’ (SIL) package allowing
optimum circuit board packing density and very high
reliability.
TIP (A)
RING (B)
RING FEED 1
RING FEED 2
VRLY
RRD
RRC
RGND
Loop Feed/
Ring Feed
Speech Circuit
Relay Drive
Circuit
Loop Detection
VBAT AGND VDD VEE
Figure 1 - Functional Block Diagram
JUNC
MUTE
SHK
LED
THRESH ADJ
2-63
1 page  
Preliminary Information
MH88520-1
Absolute Maximum Ratings†
Parameter
Symbol
Min
Max Units
1 Voltage Supplies
Referenced to GND
VDD -0.3
VEE -15
+15
0.3
VBat
-35
0.3
2 Clamp Diode Breakdown Voltage-VRef to RGND
VRLY
+32
3 Operating Temperature
TAMB
0
+70
4 Storage Temperature
TS -55 +125
5 Power Dissipation
PD 4
† Exceeding these values may cause permanent damage. Functional operation under these conditions is not implied.
AC Electrical Characteristics†
Voltages are with respect to ground (VSS), TA = 25°C, unless otherwise stated.
Test conditions unless noted, VDD=5V, VEE=-5V, VBat=-24V).
V
V
V
V
°C
°C
Watt
Characteristics
Sym
Min Typ‡ Max Units
Test Conditions
1 Junctor to Differential Output
(tip-ring) Gain
2 Differential; Input (tip-ring) to
Junctor Gain
-7.0 0
0.0
dB 1kHz, 0.5V source on
pin 16. Note 2
dB 1kHz, 0.5V Source
Applied on pins 1&3
Note 1, 2
3 On/Off Hook Detection Threshold
Loop Current IThresh
4 Transhybrid Loss
5 Passband Frequency Response
8.0 10
30
±1.0
12
mA Note 1
dB Notes 1,2
dB Notes 1,2
200Hz - 3400Hz
6 Power Supply
Rejection Ratio
(@ Junctor)
VBAT
VDD
VEE
PSRR
PSRR
PSRR
30
40
40
dB Notes 1,2. Ripple
dB 0.1V 1kHz
dB
7 Common Mode Rejection Ratio
(Tip and Ring to Junctor)
CMRR
40
dB Notes 1,2
1kHz, 0.5V
8 Longitudinal Balance
46 50
dB Notes 1
9 Junctor Output Impedance
10 Return Loss at Tip, Ring
ZOJ 604
18 30
Ω
dB 1kHz Notes 1,2
11 Max. Signal Level
3 dB Notes 1,2
12 Max. Ringing Voltage
13 Max. Ringing Frequency
105 VRMS
25 60 Ηz
14 Idle Channel Noise
at T-R
at Junctor
NTR
NJ
-80 -70 dBmp
-80 -75 dBmp Notes 1,2
15 Mute Attenuation
30 dB Notes 1,2
† Exceeding these values may cause permanent damage. Functional operation under these conditions is not implied.
‡ Typical figures are at 25°C with nominal+ 5V supplies and are for design aid only: not guaranteed and not subject to production testing.
Note 1: 754Ω connected between JUNCTOR (pin 16) and 0V.
Note 2: German Impedance connected between TIP (A) (pin 1) and RING (B) (pin 3).
2-67
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet MH88520-1.PDF ] | |
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