MH88632B データシートの表示（PDF） - Mitel Networks
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MH88632B Datasheet PDF : 17 Pages
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MH88632B
Preliminary Information
TIP
1
RING
2
XLA
3
XLB
4
XLC
5
XLD
6
IC
7
GRD
8
IC
9
IC
10
RGND
11
VRLY
12
LRD
13
BRD
14
LRC
15
BRC
16
GRC
17
AGND
18
NATT
19
N1
20
N2
21
Z900
22
Z1
23
Z2
24
TX
25
RX
26
GTX0
27
GTX1
28
GRX0
29
GRX1
30
IC
31
Z600
32
NS
33
TG
34
RL
35
RV
36
FL
37
RG
38
VEE
39
VCC
40
Pin Description
Figure 2 - Pin Connections
Pin # Name
Description
1
TIP Tip Lead. Connects to the Tip lead of a telephone line usually via an external protection
circuit.
2
RING Ring Lead. Connects to the Ring lead of a telephone line usually via an external protection
circuit.
3
XLA Loop Relay Contact A. Connects to XLB through relay contacts (K1A) when the relay is
energized.
4
XLB Loop Relay Contact B. Connects to XLA through relay contacts (K1A) when the relay is
energized.
5
XLC Loop Relay Contact C. Connects to XLD through relay contacts (K1B) when the relay is
energized.
6
XLD Loop Relay Contact D. Connects to XLC through relay contacts (K1B) when the relay is
energized.
7
IC Internal Connection. No connection should be made to this pin.
8
GRD Ground Ring Lead Relay Drive (Output). Connects to the Ground Ring Lead Relay coil
(K3) and is controlled by GRC.
9
IC Internal Connection. No connection should be made to this pin.
10
IC Internal Connection. No connection should be made to this pin.
11
RGND Relay Ground. Return path for relay supply voltage.
12
VRLY Relay Positive Supply Voltage. Normally +5V. Connects to all relay coils and the relay
supply voltage.
13
LRD Loop Relay Drive (Output). Connects to the Loop Relay coil (K1) and is controlled by
LRC.
14
BRD Bias Relay Drive (Output). Connects to the Bias Relay coil (K2) and is controlled by BRC.
15
LRC Loop Relay Control (Input). A logic 1 activates LRD. The Loop Relay (K1) is used for
placing the Line Termination across Tip and Ring.
2-240
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