CS61881-IB View Datasheet(PDF) - Cirrus Logic

Part Name

Description

MFG CO.

CS61881-IB

Octal E1 Analog Front End

Cirrus Logic 

CS61881

5. APPLICATIONS

+

68µF

Note 2

RGND

+3.3V

0.1µF

+

0.1µF

Note 1

TGND

+3.3V

+

0.1µF

GNDIO

+3.3V

75 Ω

Cable

NC

120 Ω

Cable

RV+

VCCIO

TV+

RTIP

0.1µF

RRING

TRING

CS61881

TTIP

R1

RECEIVE

LINE

R2

T1 1:2

TRANSMIT

LINE

T2 1:1.15

CBLSEL

13.3k Ω

REF

GND

Figure 9. Internal RX Impedance Matching

Component

R1 (Ω)

R2 (Ω)

75 Ω Coaxial Cable

15

15

120 Ω Coaxial Cable

15

15

Notes: 1) Required Capacitor between each TVCC, RVCC, VCCIO and TGND, RGND, GNDIO respectively.

2) Common decoupling capacitor for all TVCC and TGND pins.

26

DS451PP3

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