MH88614 Просмотр технического описания (PDF) - Mitel Networks

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MH88614

Programmable CODEC SLIC

Mitel Networks 

Advance Information

MSE

Uncadenced

MH88614

trdr

MSE

cadenced

trdr

trda

RE

trda - MSE should be removed at least 200ms before applying RE.

trdr - RE should be removed at least 120ms before applying MSE.

Figure 4 - Call & Message Indication

When applying ringing and message signal to the

phone the two signals should be applied separately

to minimise total power consumption. Figure 4

indicates how the timing of this process could best

be achieved for cadenced and uncadenced message

signalling.

Power Denial can be applied at any time to remove

the line from service. The Power Denial input

enables the line to be isolated from the battery under

fault conditions or for maintenance purposes. A logic

low will remove the battery feed whilst a logic high

will provide power to the line.

Absolute Maximum Ratings*

Parameter

Symbol

Min

Max

Units

Comments

1 DC Supply Voltage

2 Ringing Voltage

3 Message Voltage

4 Overvoltage Tip/Gnd

Ring/Gnd, Tip/Ring

VDD

VEE

VBAT

VRING

VMSG

-0.3

+0.3

0.3

+15

-15

-60

130

-180

300

V

V

V

VRMS

V

V

VDC + AC PEAK

MAX 1ms

(with power on)

5 Ringing Current

6 Message Current

7 Short Circuit current

(continuous),

Tip/Gnd, Ring/Gnd, Tip/Ring

IRING

IMSG

45

mA

6

mA

60

mA

8 Storage

Temp

TSTG

-40

+100

°C

9 Package Power

Dissipation

PDISS

2.5

W

TAMB 70°C max

* Exceeding these values may cause permanent damage. Functional operation under these conditions is not implied.

2-133

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