Datasheet

DS21352/DS21552

92 of 137

Figure 16-7 PROTECTED INTERFACE EXAMPLE FOR THE DS21352

Note:

The 68uf cap is required to maintain VDD levels during a transient event.

COMPONET DESCRIPTION

D1 – D4 Schottky Diode, International Rectifier 11DQ04

C1 0.1uf ceramic in parallel with 10uf tantalum

C2 .47 uf, non polarized ceramic construction

Fuse 1.25A slo-blo, Littlefuse V2301.25

S Semtech LC01-6, 6V low capacitance TVS

X1, X2 Transpower PT314, Low DCR

RTIP

RRING

TTIP

TRING

Receive

Line

DS21352

1.544MHz

MCLK

+VDD

D3 D4

1:1

Fuse

Transmit

Line

Fuse

0.1uF

2:1

470

DVDD

DVSS

0.1uF

RVDD

RVSS

0.1uF

TVDD

TVSS

0.1uF

+3.3V

0.01uF

68u