MH89626C Ver la hoja de datos (PDF) - Mitel Networks
Número de pieza
componentes Descripción
Fabricante
MH89626C Datasheet PDF : 12 Pages
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MH89626C
Preliminary Information
TIP
1
RING
2
RF
3
TF
4
LPND
5
VBat
6
RF1
7
RF2
8
VEE
9
AGND
10
VDD
11
IC
12
VAC
13
IC
14
CS
15
SHK
16
LED
17
LCA
18
SD1
19
VREF
20
D1
21
C2i
22
Do
23
F1i
24
IC
25
IC
26
IC
27
GS
28
IC
29
SD7
30
SD6
31
SD5
32
IC
33
VRLY
34
RGND
35
RD2
36
RD3
37
RD1
38
Pin Description
Figure 2 - Pin Connections
Pin # Name
Description
1
TIP Tip Lead: Connects to the TIP lead of the telephone line.
2
RING Ring Lead: Connects to the Ring lead of the telephone line.
3
RF Ring Feed.
4
TF Tip Feed.
5
LGND Loop Ground: Return path for the battery (VBat) supply voltage. Connects to System
Ground.
6
VBat Battery Supply Voltage: Normally -48V.
7
RF1 Ring Feed 1: Ringing input.
8
RF2 Ring Feed 2: Ringing output.
9
VEE Negative Supply Voltage. (-5V).
10
AGND Analog Ground: Analog and Digital Ground. Connects to system ground.
11
VDD Positive Supply Voltage. (+5V).
12
IC Internal Connection.
13
VAC Battery AC Component (input). AC noise present in the VBat supply isolated from the DC
components, can be applied to this pin to reduce longitudinal noise on TIP and RING. To
implement this feature, connect a 0.1µF 100V capacitor from VBat to VAC, and 1kΩ resistor
from VAC to AGND. This pin must be tied to AGND when not used.
14
IC Internal Connection.
15
CS Chip Select (Input): A TTL compatible digital input to enable the SDi to control all the
functions of the driver.
16
SHK Switch Hook Detect (Output): A logic low indicates an off-hook condition.
17
LED LED Drive (Output).: Drives an LED directly through an internal 2.2kΩ resistor. A logic low
indicates an off-hook condition.
18
LCA Loop Current Adjust (input): If this pin is left open, the constant current will be set at
23mA. The loop current can be adjusted by connecting a resistor to VEE.
2-286
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