MH88612C Ver la hoja de datos (PDF) - Mitel Networks
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MH88612C Datasheet PDF : 8 Pages
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MH88612C
Preliminary Information
Pin Description
IC
0
TF
1
IC
2
VR
3
VRef
4
VEE
5
GNDA
6
GS
7
VX
8
TIP
9
RING
10
RF
11
VDD
12
RC
13
RD
14
RV
15
VRLY
16
IC
17
VBat
18
CAP
19
SH K
20
Figure 2 - Pin Connections
Pin # Name
Description
0
IC Internal Connection. No pin fitted in this position.
1
TF Tip Feed. Connects to external diode to LPGND for protection.
2
IC Internal Connection. No pin fitted in this position.
3
VR Voice Receive (input) is the 4 wire analog signal to the SLIC.
4
VRef Voltage Reference to set the constant current feed to the subscriber line. Constant current
feed can be adjusted by the input voltage on the VRef. This pin can also be grounded for
normal 21mA loop current.
5
VEE Negative Power Supply voltage. (-5V).
6
GNDA Analog Ground. (0V)
7
GS Gain setting (Input). A logic low at this input adds an additional -0.5dB gain in the receive
direction. This gain is in addition to the gain set by the Codec. A high adds 0dB gain.
8
VX Voice Transmit (Output) is the 4-wire analog signal from the SLIC.
9
TIP Connects to the “Tip” lead of the telephone line.
10
RING Connects to the “Ring” lead of the telephone line.
11
RF Ring Feed (Input). is connected via the ring relay to either negative battery feed voltage,
(RV), or ringing voltage input.
12
VDD Positive Power Supply Voltage. (+5V)
13
RC Relay Control (Input). Active high will apply ringing to the line.
14
RD Output Drive Sources current when RC is at a logic high.
15
RV Ring Feed Voltage connects to pin 11 (RF) through a normally closed relay contact.
16
VRLY Relay voltage Supply. (+5V)
17
IC Internal Connection. No pin fitted in this position.
18
VBat Negative Battery Feed Supply Voltage. (-48V)
19
CAP Connects external capacitor to ground for ring trip.
20
SHK Switch Hook Detect (Output). Active high.
2-114
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