CPC5621 datasheet(6/18 Pages) IXYS

6 / 18 page

INTEGRATED CIRCUITS DIVISION

CPC5620/CPC5621

www.ixysic.com

R05

2. Application Circuits

LITELINK can be used with telephone networks

worldwide. Some public telephone networks, notably

in North America and Japan require resistive line

termination. Other telephone networks, as in Europe

and elsewhere, require a reactive line termination.

The application circuits below address both line

termination models. The reactive termination

application circuit (see Figure 3 on page 8) describes the

TBR-21 implementation. This circuit can be adapted

easily for other reactive termination needs.

2.1 Resistive Termination Application Circuit

Figure 2. Resistive Termination Application Circuit Schematic

¹This design was tested and found to comply with FCC Part 68 with this

Sidactor. Other compliance requirements may require a different part.

²Higher-noise power supplies may require substitution of a 220

H inductor,

Toko 380HB-2215 or similar. See the Power Quality section of IXYS

Integrated Circuits Division application note AN-146, Guidelines for

Effective LITELINK Designs

for more information.

³Optional for enhanced transhybrid loss.

4Use voltage ratings based on the isolation requirements of your

application.

RING

TX+

RX+

TX-

RX-

3.3 or 5V

C13

C14

(RTX)

80.6K

R23 2

BR-

TIP

RING

LITELINK

VDD

TXSM

TX-

TX+

GND

RX-

RX+

SNP+

SNP-

RXF

MODE

RING

CID

REFL

TXF

ZTX

ZNT

TXSL

BR-

NTS

GAT

NTF

DCS1

DCS2

ZDC

BR-

RPB

RXS

VDDL

DB1

SP1 1

BR-

0.1μ

C16

10μ

FB1

600 Ω

200 mA

1μ

(RTXF)

60.4K

(RHTF)

200K

R13

(RNTS)

C10

0.01μ

500V

R15

1.69M

R20

6.49M

(RDCS1A)

6.49 M

(CDCS)

0.027μ

(RRXF)

130K

1.5M

(CSNP-)

220pF

(RSNP-2)

1.8M

68.1

BR-

NOTE: Unless otherwise noted:

Resistor values are in Ohms

All resistors are 1%.

Capacitor values are in Farads.

R14

(RGAT)

CPC5602C

(CGAT)

(RZDC)

8.2

R10

301

R18

3.32K

C18

15p 3

R12

499K

(RNTF)

BR-

C15

0.01μ

500V

221K

(RNTX)

261K

0.1μ

R16

R75

BR-

C21

100p

R76

R22

R21

C12

R44

R45

(RSNP-1)

(RSNP+2)

(RSNP+1)

(RSNPD)

(RDCS1B)

(RHTX)

(RZNT)

(RZTX)

(RPB)

(RDCS2)

(RVDDL)

BR-

(CSNP+)

CID

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