MH88612 Ver la hoja de datos (PDF) - Mitel Networks
Número de pieza
componentes Descripción
Fabricante
MH88612 Datasheet PDF : 8 Pages
| |||
MH88612
Preliminary Information
TF
1
LPGND
2
VR
3
VRef
4
VEE
5
AGND
6
PD
7
VX
8
TIP
9
RING
10
RF
11
VDD
12
RC
13
RD
14
RV
15
VRLY
16
CD
17
VBat
18
CAP
19
SHK
20
Pin Description
Figure 2 - Pin Connections
Pin # Name
Description
1
TF Tip Feed. Connects to external diode for protection.
2
LPGND Loop Ground. is the system ground reference with respect to VBat. Normally tied with
AGND.
3
VR Voice Receive (input) is the 4 wire analog signal to the SLIC.
4
VRef Voltage Reference (Input) 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 25 mA loop current.
5
VEE Negative Power Supply Voltage (-5V).
6
AGND Analog Ground (0V).
7
PD Power Denial (Input). A logic high will isolate the battery voltage to Tip/Ring.
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 normally connected to Ring relay for negative battery feed voltage
and ringing voltage input.
12
VDD Positive Power Supply Voltage (+5V).
13
RC Relay Control (Input). Active high.
14
RD Open collector sinks current when RC is at logic high.
15
RV Ring Feed Voltage connects to pin 11 (RF) through a normally closed relay.
16
VRLY Relay voltage Supply (+5V).
17
CD Clamping Diode. Connects to GNDA.
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.
2-106
Share Link: 