MH88625 Ver la hoja de datos (PDF) - Mitel Networks
Número de pieza
componentes Descripción
Fabricante
MH88625 Datasheet PDF : 16 Pages
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MH88625
Preliminary Information
TIP
RING
TF1
TF2
RF1
RF2
LGND
LCA
VBat
IC
RGND
VRLY
RRD
RNGC
REVC
ESI
ESE
AGND
NATT
N1
1
N2
21
2
Z900
22
3
Z1
23
4
Z2
24
5
TX
25
6
RX
26
7
GTX0
27
8
GTX1
28
9
GRX0
29
10
GRX1
30
11
IC
31
12
Z600
32
13
NS
33
14
SHK
34
15
UD
35
16
IC
36
17
IC
37
18
IC
38
19
VEE
39
20
VDD
40
Figure 2 - Pin Connections
Pin Description
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Name
Description
TIP Tip Lead. Connects to the “Tip” lead of subscriber line.
RING Ring Lead. Connects to the “Ring” lead of the subscriber line.
TF1 Tip Feed 1. Access point for balanced ringing. Normally connects to TF2.
TF2 Tip Feed 2. Access point for balanced ringing. Normally connects to TF1.
RF1 Ring Feed 1. Access point for balanced ringing. Normally connects to RF2.
RF2 Ring Feed 2. Access point for balanced ringing. Normally connects to RF1.
LGND Battery Ground. VBat return path. Connected to system’s energy dumping ground.
LCA Current Limit Set (Input). The current limit is set by connecting an external resistor to
ground. For 30mA default current, this pin is tied to GND
VBat Battery Voltage. Typically -48Vdc is applied to this pin.
IC Internal Connection. This pin is internally connected and must be left open.
RGND Relay Driver Ground Connection.
VRLY Relay Supply Voltage Connection.
RRD Ring Relay Drive (Output). Connects to ring relay coil.
RNGC Ring Relay control (Input). A logic low enables the Ring Relay Drive (RRD) output which
activates the Ring Relay. The internal auto ring trip circuitry de-activates the relay drive
output upon detection of switch-hook.
REVC Reversal Control (Input). A logic high reverse the internal Tip and Ring connections.
ESI External Signal Input. 12/16kHz meter pulse input.
ESE External Signal Enable. 12/16kHz meter pulse enable.
AGND Analog Ground. VDD and VEE return path.
2-184
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