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PDF MH89728 Data sheet ( Hoja de datos )
| Número de pieza | MH89728 | |
| Descripción | MT8972 Loop Extender Circuits Advance Information | |
| Fabricantes | Mitel Networks | |
| Logotipo |  |
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MH89726/728
®
MT8972 Loop Extender Circuits
Advance Information
Features
• Operates from single or dual power supply
• MH89726 extends transmission performance
for the MT8972 (DNIC) at 160kbit/s line rate
• MH89728 extends transmission performance
for the MT8972 (DNIC) at 80kbit/s line rate
• MH89726 and MH89728 are pin for pin
compatible with each other
• Compact SIL package
• Over 6km loop range on 24 AWG
Applications
• Digital subscriber lines
• Digital PABX line cards and telephone sets
• High speed, limited distance modem
• ISDN U - Interface
ISSUE 2
November 1990
Ordering Information
MH89726/728 10 Pin SIL Package
0°C to 70°C
Description
The MH89728 and MH89726 are thick film hybrid
devices which may be used to extend the operating
range of the MT8972 (DNIC). The hybrids combine
signal equalization and amplification for the receive
and transmit paths on each device.
The small size of these hybrids makes them suitable
for line card or terminal use with the MT8972. The
gain of the transmit signal may be adjusted through
the use of an external resistor.
TXIN
TXGAIN
Pre-
Equalizer
TX
Amplifier
Phase
Compensator
RXOUT
VBias
Pre-
Canceller
RX
Amplifier
TEST
V+ V-
Figure 1 - Functional Block Diagram
TXOUT
RXIN -
RXIN +
9-127
1 page  
Advance Information
MH89726/728
Recommended Operating Conditions
Characteristics
Sym Min Typ Max Units
Test Conditions
1 + 15 V Supply
VDD 13.5 15.0 16.5
V Note 1
2 - 15 V Supply
VSS -16.5 -15.0 -13.5 V Note 2
3 Standby Current
IS 3.0 mA
Note 1: A single voltage supply of +30V±10% can be used on VDD with VBias grounded through a 0.33 µF capacitor and VSS
grounded.
Note 2: A single voltage supply of -30V±10% can be used on VSS with VBias grounded through a 0.33 µF capacitor and VDD
grounded.
A.C. Electrical Characteristics
Characteristics
Sym Min Typ Max Units
Test Conditions
1 Active Current
2 TX Gain
3 TX Phase Angle
4 RX Gain
5 RX Phase Angle
6 Line Power
IA 7.0 mA @ 60 kHz for 80 kbit/s
@120 kHz for 160 kbit/s
ATX 9.0
dB @ 60 kHz for 80 kbit/s
@120 kHz for160 kbit/s
ΦTX -170.0
° @ 60 kHz for 80 kbit/s
@120 kHz for 160 kbit/s
ARX 0.0
dB @ 60 kHz for 80 kbit/s
@120 kHz for160 kbit/s
ΦRX
12.0
° @ 60 kHz for 80 kbit/s
@120 kHz for160 kbit/s
10.0
dBm With 2:1 transformer
9-131
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet MH89728.PDF ] | |
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