MH88620BR 데이터 시트보기 (PDF) - Mitel Networks
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MH88620BR Datasheet PDF : 14 Pages
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MH88620BR
Preliminary Information
TIP
1
RING
2
TF1
3
TF2
4
RF1
5
RF2
6
LGND
7
LCA
8
VBAT
9
IC
10
RGND
11
VRLY
12
RRD
13
RNGC
14
REVC
15
ESI
16
ESE
17
AGND
18
NATT
19
N1
20
N2
21
NC
22
Z1
23
Z2
24
TX
25
RX
26
GTX0
27
GTX1
28
GRX0
29
GRX1
30
NC
31
NC
32
NC
33
SHK
34
IC
35
IC
36
IC
37
IC
38
VEE
39
VDD
40
Pin Description
Figure 2 - Pin Connections
Pin # Name
Description
1
TIP Tip Lead. Connects to the TIP lead of the subscriber line.
2
RING Ring Lead: Connects to the Ring lead of the subscriber line.
3
TF1 Tip Feed 1: Access point for balanced ringing. Normally connects to TF2.
4
TF2 Tip Feed 2: Access point for balanced ringing. Normally connects to TF1.
5
RF1 Ring Feed 1: Access point for balanced ringing. Normally connects to RF2.
6
RF2 Ring Feed 2: Access point for balanced ringing. Normally connects to RF1.
7
LGND Battery Ground. VBat return path. Connected to system’s energy dumping ground.
8
LCA Current Limit Set (Input): The current limit is set by connecting an external resistor as
shown in Table 5. For 70mA default current, this pin is tied to -5V.
9
VBat Battery Voltage: Typically -48V dc is applied to this pin.
10
NC No Connection: Reserved.
11
RGND Ring Driver Ground Connection.
12
VRLY Relay Supply Voltage Connection.
13
RRD Ring Relay Drive (Output). Connects to ring relay coil.
14
RNGC Ring Relay Control (Input) .
15
NC Reserved. No Connection.
16
TRD Test Relay Drive (Output): Connects to test relay coil.
17
TRC Test Relay Control (Input).
18
AGND Analog Ground: VDD and VEE. return path.
19
NC No Connection: Reserved.
20
N1 Network Balance Node 1. An external network balance impedance can be connected
between N1 and AGND. See Fig 4. For complex impedances N2 no connection.
21
N2 Network Balance Node 2. An external network balance impedance can be connected
between N2 and AGND. See Fig 4 N2 connects to GND for 900Ω balance.
2-146
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