MH88622 Просмотр технического описания (PDF) - Mitel Networks

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Компоненты Описание

производитель

MH88622

DUAL OPS SLIC

Mitel Networks 

Preliminary Information

MH88622

Pin Description (Continued)

Pin #

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

Name

Description

NC

NC

RF1

RF2

RGV

RG1

NC

NC

RC2

LR2

VDD

GND

VEE

VX2

LCS2

No Connection. This pin should not be connected.

No Connection. This pin should not be connected.

Ringing Frequency Node 1 (Input). A capacitor is connected between RF1 & RF2 and

determines the frequency of the ringing generator.

Ringing Frequency Node 2 (Input). Two capacitors are connected between RF1& RF2

and from RF2 to AGND. This determines the frequency of the ringing generator.

Ringing Gain Voltage. Connects to RG1 through a resistor to reduce the output ringing

voltage. When left open circuit output ringing voltage is 90Vrms.

Ringing Gain Node 1. Connects to RGV through a resistor to reduce the output ringing

voltage. When left open circuit output ringing voltage is 90Vrms.

No Connection. This pin should not be connected.

No Connection. This pin should not be connected.

Ringing Control (Input). A logic level applied to this pin enables ringing to be applied

across Tip and Ring of subscriber 2.

Line Reversal. A logic 1 applied to LR2 will reverse the “Tip” and “Ring” to subscriber 2.

This pin has an internal pull down.

Positive Supply Voltage. +5Vdc. This pin should be connected to pin 14 of the hybrid on

the PCB.

Ground. Return path for VDD, VEE, VBat & DCRI. This pin should be connected to pins 5,

13 & 36 of the hybrid on the pcb.

Negative Supply Voltage. -5Vdc. This pin should be connected to pin 12 of the hybrid on

the PCB.

Transmit (Output). 4-Wire GND referenced audio input for subscriber 2.

Loop Current Set 2. Logic 1 gives ILoop = 40mA, Logic 0 gives ILoop = 25mA.

SHK2 Off Hook Indication (Output). A logic high output indicates when subscriber 2 equipment

has gone off hook.

VR2 Receive (Input). 4-Wire GND referenced audio input for subscriber 2.

ESE2 External Signal Enable (Input). The external signal to subscriber 2 is controlled by a logic

level applied to this pin.

ESI2 External Signal Input. A continuous signal should be applied to this pin which will be

switched to “Tip” and “Ring” of subscriber 2.

GND Ground. This pin should be tied to pins 5, 13 & 28 on the PCB.

DCRI DC Ringing Voltage Input. A continuous 120Vdc is applied to this input to achieve 90

Vrms ringing. This should be connected to pin 4 of the hybrid on the PCB.

VBAT Battery Voltage. Typically -48V dc is applied to this pin. This should be connected to pin 3

of the hybrid on the PCB.

RING2 Ring Lead. Connects to the “Ring” lead of subscriber line 2.

TIP2 Tip Lead. Connects to the “Tip” lead of subscriber line 2.

2-175

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