43

Basic Application Circuits

VRX

VRS

TIP

VFB

BGND

AGND

VCC

RING

VTX

-IN

VBL

VBH

RD

RTD

CDC

ILIM

E0

F2

F1

F0

FIGURE 14. HC55180 BASIC APPLICATION CIRCUIT

DET

ALM

HC55180

POL

TABLE 2. BASIC APPLICATION CIRCUIT COMPONENT LIST

COMPONENT

VALUE

TOLERANCE

RATING

U1 - Ringing SLIC

HC5518x

N/A

N/A

20k

Ω

1%

0.1W

49.9k

Ω

1%

0.1W

71.5k

Ω

1%

0.1W

210k

Ω

1%

0.1W

0.47

µF

20%

10V

4.7

µF

20%

10V

0.1

µF

20%

>100V

0.1

µF

20%

100V

1N400X type with breakdown > 100V.

Protection resistor values are application dependent and will be determined by protection re-

quirements. Standard applications will use

≥ 35Ω per side.

pedance = 210k

Ω/400 = 525Ω, with 39Ω protection resistors, impedance across Tip and Ring terminals = 603Ω. Where applicable, these compo-

nent values apply to the Basic Application Circuits for the HC55180, HC55181, HC55182, HC55183 and HC55184. Pins not shown in the Basic

Application Circuit are no connect (NC) pins.

HC55180, HC55181, HC55182, HC55183, HC55184