MH88630 Ver la hoja de datos (PDF) - Mitel Networks

Número de pieza

componentes Descripción

Fabricante

MH88630

Central Office Interface (LS/GS)

Mitel Networks 

MH88630

Preliminary Information

IC 1

T2

R3

IC 4

IC 5

LPGND 6

RINGND 7

VTR+ 8

QE 9

QB 10

VTR- 11

XA 12

XB 13

XC 14

RGND 15

RC1 16

RD1 17

CD 18

RD2 19

RC2 20

40 RG

39 FC

38 RV

37 RC

36 TG

35 VDD

34 VEE

33 AGND

32 RXIN-

31 RXIN+

30 NETBAL

29 VX

28 GSX

27 TXIN+

26 TXIN-

25 VCC-

24 VCC+

23 RXOUT

22 GSR

21 VR

Pin Description

Figure 2 - Pin Connections

Pin #

Name

Description

1

IC

Internal Connection. Pin cut short. Leave open circuit.

2

T

Tip (Input). Normally connects to the “Tip” lead of the C.O.

3

R

Ring (Input). Normally connects to the “Ring” lead of the C.O.

4

IC

Internal Connection. Leave open circuit.

5

IC

Internal Connection. Leave open circuit.

6

LPGND Loop Ground is the system ground reference with respect to -48 volts.

7

RINGND Ring Ground (Input). For Ground Start Trunk only, a logic low input will enable the trunk

circuit to ground the Ring lead through a low resistance (390Ω). This is a signal to the

C.O. that the interface is seizing the line.

8

VTR+ Connects to the collector of an external transistor (Q1) and TXIN - (pin 26) via an

external capacitor.

9

QE

Connects to the emitter of an external transistor (Q1).

10

QB

Connects to the base of an external transistor (Q1).

11

VTR- Connects to the TXIN+ (pin 27), via an external capacitor (C1).

12

XA

External relay contact (K1) connection from VTR+ (pin 8), activated by loop seize control

input (RC1).

13

XB

External relay contact (K1) connection from XC (pin 14), activated by loop seize control

input (RC1).

14

XC

External relay contact (K1) connection from XB (pin 13), activated by loop seize control

input (RC1).

15

RGND Relay Ground.

16

RC1 Relay Control 1 (Input). A logic high will activate the relay (K1) to provide loop seize

across Tip and Ring.

17

RD1 Relay Driver 1 (Output): Open collector sinks current when RC1 is high. Diode clamp

protected.

18

CD

Clamping Diode: Normally connects to the positive supply voltage.

2-216

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