CS61582 datasheet(26/32 Pages) CIRRUS

26 / 32 page

APPLICATIONS

Line Interface

Figure A1 illustrates a typical connection diagram

and Table A1 lists the external components that

are required in T1 and E1 applications.

In the transmit line interface circuitry, capacitors

C1 and C2 provide transmitter return loss. The

0.47

µF capacitor in series with the transformer

primary prevents output stage imbalances from

producing a DC current through the transformer

that might saturate the transformer and result in

an output level offset.

In the receive line interface circuitry, resistors R1-

R4 provide receive impedance matching and

receiver return loss. The 0.47

µF capacitor to

ground provides the necessary differential input

voltage reference for the receiver.

Power Supply

As shown in Figure A1, the CS61582 operates

from a 5.0 Volt supply. Separate analog and digi-

tal power supply and ground pins provide internal

isolation. The TGND, RGND, and DGND ground

pins must not be more negative than AGND. It is

recommended that all of the supply pins be con-

AV+ AGND1:2 BGREF

TV+1

TGND1

RV+1 RGND1 DV+ DGND1:3

0.01

µF

TCLK1

TPOS1

TNEG1

RCLK1

RPOS1

RNEG1

TCLK2

TPOS2

TNEG2

RCLK2

RPOS2

RNEG2

Framer

TTIP1

TRING1

1:1.15

RTIP1

RRING1

TTIP2

TRING2

RTIP2

RRING2

1:1.15

Hardware Control

Power Supply

Clock Generator

Channel 2

Channel 1

transmit

0.1

µF

0.1

µF

TV+2

TGND2

RV+2

RGND2

µF

0.1

µF

0.1

µF

0.1

µF

1:1.15

receive

1:1.15

receive

Ω

VCC

0.47

µF

0.47

µF

REFCLK 1XCLK RESET CLKE

RLOOP[1:2]

TAOS[1:2] LLOOP[1:2]

DPM[1:2]

MTIP[1:2] MRING[1:2]

LOS[1:2]

CON[0:2]2

CON[0:2]1

0.47

µF

0.47

µF

Figure A1. Typical Connection Diagram

Data Rate (MHz)

REFCLK Frequency (MHz)

Cable (

Ω)R1-R4 (Ω)

C1-C2 (pF)

1XCLK = 1

1XCLK = 0

1.544

12.352

100

38.3

220

2.048

16.384

28.7

470

120

45.3

220

Table A1. CS61582 External Components

DS224PP1

CS61582 Datasheet(PDF) 26 Page - Cirrus Logic

CS61582 Datasheet(HTML) 26 Page - Cirrus Logic

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

Datasheet Download

Link URL