ESDALC5-1BT2Y データシートの表示（PDF） - STMicroelectronics

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ESDALC5-1BT2Y

Automotive single-line low capacitance Transil™, transient surge voltage suppressor (TVS) for ESD protection

STMicroelectronics 

Recommendation on PCB assembly

3

Recommendation on PCB assembly

ESDALC5-1BT2Y

3.1

Stencil opening design

1. General recommendation on stencil opening design

a) Stencil opening dimensions: L (Length), W (Width), T (Thickness).

Figure 19. Stencil opening dimensions

L

TW

b) General design rule

Stencil thickness (T) = 75 ~ 125 µm

Aspect Ratio = W-T---- ≥ 1,5

Aspect Area = 2----T---L-(---L-×----+-W----W------) ≥ 0,66

2. Reference design

a) Stencil opening thickness: 100 µm

b) Stencil opening for central exposed pad: Opening to footprint ratio is 50%.

c) Stencil opening for leads: Opening to footprint ratio is 90%.

Figure 20. Recommended stencil window position in mm (inches)

0.40

(0.016)

0.55

(0.022)

0.014

0.014

(0.00055) (0.00055)

0.522

(0.021)

Lead footprint on PCB

Stencil window opening

8/12

DocID025820 Rev 1

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