MH88634 데이터 시트보기 (PDF) - Mitel Networks
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MH88634 Datasheet PDF : 8 Pages
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MH88634
Preliminary Information
TIP
1
RING
2
XLA
3
XLD
4
XLB
5
XLC
6
IC
7
IC
8
IC
9
SHK
10
Rx
11
VEE
12
Tx
13
RV
14
FL
15
RL
16
VDD
17
AGND
18
LRC
19
VRLY
20
LRD
21
Pin Description
Figure 2 - Pin Connections
Pin # Name
Description
1
TIP Tip Lead: Connects to the “Tip” lead of the central office
2
RING Ring Lead: Connects to the “Ring” lead of the central office
3
XLA Loop Relay Contact A:. Connects to XLB through the Loop relay (K1) contacts when the
relay is activated. This operates the internal active termination circuitry.
4
XLD Loop Relay Contact D: See XLC for description
5
XLB Loop Relay Contact B: See XLA for description
6
XLC Loop Relay Contact C: Connects to XLD through the loop relay (K1) contacts when the
relay is activated. This operates the internal active termination circuitry.
7
IC Internal Connection: This pin is internally connected and must be left open.
8
IC Internal Connection.: This pin is internally connected and must be left open.
9
IC Internal Connection: This pin is internally connected and must be left open.
10
SHK Switch Hook (Output). A logic low indicates either forward or reverse loop current.
11
Rx Receive (Input): 4-Wire ground (AGND) referenced audio input.
12
VEE Negative Supply Voltage. -5V
13
Tx Transmit (Output). 4-Wire ground (AGND) referenced audio output.
14
RV Ring Voltage Detect (Output). A logic low indicates that ringing voltage is across the Tip
and Ring leads. Note that this output toggles at the ringing cadence and not at the ringing
frequency.
15
FL Forward Loop Detect (Output): In the on-hook state, a logic low output indicates that
forward loop battery is present. In the off-hook state, a logic low indicates that forward loop
current is present.
16
RL Reverse Loop Detect (Output). In the on-hook state, a logic low output indicates that
reverse loop battery is present. In the off-hook state, a logic low output indicates that
reverse loop current is present. Reverse loop refers to the Tip lead negative respect to the
Ring Lead.
17
VDD Positive Supply Voltage: +5V
2-254
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