MH8843AE 查看數據表（PDF） - Mitel Networks

零件编号

产品描述 (功能)

生产厂家

MH8843AE

Calling Number Identification Circuit 2

Mitel Networks 

Preliminary Information

MT8843

Line Reversal

Alerting Signal

A/B Wires

A

B

Ch. seizure

C

D

TRIGout

Mark

E

Data Packet

F

PWDN

ESt

St/GT

StD

tDP

Note 5

tGP

tREC

TE DC load

TE AC load

<120µA

20±5ms

FSKen

CD

tDA

Note 6

tGA

VTGt

tABS (Note 1)

15±1ms

< 0.5mA (optional)

Current wetting pulse (see SIN227)

Zss (Refer to SIN227)

tCP

DR

DCLK

DATA

OSCout

..101010..

Data

Ring

G

Note 4

50-150ms

Note 2

Note 3

tCA

A ≥ 100ms

B = 88-110ms

C ≥ 45ms (up to 5sec)

D = 80-262ms

E = 45-75ms

F ≤ 2.5sec (typ. 500ms)

G > 200ms

Note: All values obtained

from SIN227 Issue 1

Figure 15 - Input and Output Timing for BT Caller Display Service (CDS), e.g., CLIP

Notes:

1) By choosing tGA=15ms, tABS will be 15-25ms so that the current wetting pulse and AC load can be applied right after the StD falling

edge.

2) SIN227 specifies that the AC and DC loads should be removed between 50-150ms after the end of the FSK signal, indicated by CD

returning to high. The CNIC2 may also be powered down at this time.

3) FSKen should be set low when FSK is not expected to prevent the FSK demodulator from reacting to other in-band signals such as

speech, tone alert signal and DTMF tones.

4) TRIGout is the ring envelope during ringing.

5) The total recognition time is tREC = tGP + tDP, where tGP is the tone present guard time and tDP is the tone present detect time (refer

to section “Dual Tone Detection Guard Time” on page 25 for details).

6) The total tone absent time is tABS = tGA + tDA, where tGA is the tone absent guard time and tDA is the tone absent detect time (refer

to section “Dual Tone Detection Guard Time” on page 25 for details).

VTGt is the comparator threshold (refer to Figure 4).

5-37

Share Link: