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PDF MH88634BT-2 Data sheet ( Hoja de datos )
| Número de pieza | MH88634BT-2 | |
| Descripción | Central Office Interface Circuit Advance Information | |
| Fabricantes | Mitel Networks | |
| Logotipo |  |
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Features
• Loop Start Trunk Interface
• 600Ω & 900Ω Input Impedance
• 2-4 Wire Conversion
• Line state Detection Outputs:
• - Forward Loop
• - Reverse Loop
• - Ringing Voltage
• - Switch Hook
• One Relay Driver
• On-Hook Reception
• Small footprint area
• Meets FCC Part 68 Leakage Current
Requirements
Applications
Interface to Central Office for:
• PABX
• Key Telephone Systems
• Channel Bank
• Voice Mail
• Terminal Equipment
• Digital Loop Carrier
• Optical Multiplexer
RV FL RL SHK XLA XLB XLC XLD
MH88634B
Central Office Interface Circuit
Advance Information
DS5061
ISSUE 6
January 1999
Ordering Information
MH88634BV-2
MH88634BT-2
MH88634BV-4
21 Pin SIL Package
21 Pin 90° L/F Package
21 Pin SIL Package
Description
0°C to 70°C
The Mitel MH88634-2 Central Office Interface Circuit
trunk provides a complete analogue and signalling
link between audio switching equipment and a
telephone Line. The device is available in a single in
line package for high packing densities or with a lead
frame formed at 90° for low clearance applications.
The device is fabricated as a thick film hybrid
incorporating various technologies for optimum
circuit design and very high reliability.
This part supercedes the MH88634-2 and is pin for pin
compatible.
We advise that the B rev parts are fully tested.
However, we do not expect to see changes between
MH88634-2 and MH88634BV-2.
The component design has been changed to
improve the general performance of the part. It is
also now capable of operating at a 24V battery.
VCC VEE AGND
Status
Detection
TIP
RING
LRC
LRD
Dummy
Ringer
Line
Termination
2 - 4 Wire
Hybrid
Loop Relay
Driver
VRLY
Impedance
Matching
Network
Balance
Figure 1 - Functional Block Diagram
Receive
Gain
Transmit
Gain
RX
TX
2-265
1 page  
Advance Information
MH88634B
Tip
Ring
Protection
Circuit
1
TIP
MH88634
+5V
VCC 17
C1
2 RING
Loop Relay Control
+5V
K1
K1
K1
21 LRD
20 VRLY
19
LRC
5 XLB
3 XLA
6 XLC
4 XLD
TX 13
11
RX
RV 14
15
FL
RL 16
SHK 10
NOTES:
1) K1 Electro Mechanical 2 Form A
2) C1 and C2 are decoupling capacitors
AGND VEE
18 C2 12
-5V
Figure 3 - Typical LS Application Circuit
Analog Out
Analog In
Ringing Detect
Forward Loop
Reverse Loop
Switch Hook
2-269
5 Page 
Advance Information
MH88634B
XLA
XLB
XLC
XLD
TX
RX
+5V -5V
VCC
VEE
-V
10H 300Ω
RING
I = 25mA
100uF
+
AGND
TIP
510Ω
100uF
+
10H 300Ω
368Ω
Vs = 0.5V
~
V1
368Ω
Met to Long Bal. = 20 * Log (V1\Vs)
Figure 8 - Metallic to Longitudinal Balance Test Circuit
0.13 Max 0.14 Max
(3.3 Max) (3.6 Max)
0.625 Max
(15.9 Max)
1
2.120 Max
(53.85 Max)
0.010 + 0.002
(0.25 + 0.05)
0.020 +0.005
*0.250+0.020
(6.35+0.51)
0*.100 + 0.010 (0.5 +0.13)
(2.54 + 0.25)
Notes:
1) Not to scale
2) Dimensions in inches. (Dimensions in millimetres)
3) Pin tolerances are non-accumulative.
4) Recommended soldering conditions: Wave soldering tempetature 260˚C for 10 secs.
* Dimensions to centre of pin.
Figure 9 - Mechanical Data
0.180 + 0.020
(4.57 + 0.51)
2-275
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet MH88634BT-2.PDF ] | |
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