MT8940AC 查看數據表（PDF） - Mitel Networks

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MT8940AC

ISO-CMOS ST-BUS FAMILY T1/CEPT Digital Trunk PLL

Mitel Networks 

ISO-CMOS MT8940

Crystal Clock

(16.388 MHz

± 32 ppm)

MT8940

MS0

MS1

MS2

MS3

F0i

C12i

ENCV

C8Kb

C16i

ENC4o

ENC2o

Ai

Bi

VSS RST

VDD

C4b

C2o

F0b

Yo

MH89790

DSTi

C2i

DSTo

F0i

CSTi0

CSTi1

CSTo

RxA

OUTA

RxB

TRANSMIT

OUTB

RxD

RxT

RxR

RECEIVE

MT8980/81

ST-BUS

SWITCH

CEPT

PRIMARY

MULTIPLEX

DIGITAL

LINK

Mode of Operation for the MT8940

DPLL #1 - NOT USED

DPLL #2 - NORMAL (MS0=0; MS1=0; MS2=1; MS3=1)

Figure 7 - Synchronization at the Slave End of the CEPT Digital Transmission Link

Crystal Clock

(16.388 MHz

± 32 ppm)

MT8940

MS0

VDD

MS1

MS2

C4o

MS3

F0i

C12i

C4b

ENCV

C8Kb

C2o

C16i

ENC4o

ENC2o

C2o

Ai

Bi

F0b

VSS RST

DPLL #1 - NOT USED

DPLL #2 - NORMAL MODE

(MS0=0; MS1=0; MS2=1;

MS3=1)

ST-BUS

TIMING

SIGNALS

Crystal Clock

(16.388 MHz

± 32 ppm)

DPLL #1 - NOT USED

DPLL #2 - NORMAL MODE

(MS0=0; MS1=0;

MS2=1; MS3=1)

MT8940

MS0

MS1

MS2

MS3

F0i

C12i

ENCV

C8Kb

C16i

ENC4o

ENC2o

Ai

Bi

VSS RST

VDD

C4o

C4b

C2o

C2o

F0b

ST-BUS

TIMING

SIGNALS

Figure 8 - Generation of the ST-BUS Timing Signals

3-35

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