Cirrus-logic CS8421 Manual do Utilizador descarregar pdf (Página 34)

34 DS641F6

CS8421

1. Dimensioning and tolerance per ASME Y 14.5M-1995.

2. Dimensioning lead width applies to the plated terminal and is measured between 0.23mm and 0.33mm from the

terminal tip.

QFN THERMAL CHARACTERISTICS

INCHES MILLIMETERS NOTE

DIM MIN NOM MAX MIN NOM MAX

A -- -- 0.0394 -- -- 1.00 1

A1 0.0000 -- 0.0020 0.00 -- 0.05 1

b 0.0091 0.0110 0.0130 0.23 0.28 0.33 1, 2

D 0.1969 BSC 5.00 BSC 1

D2 0.1201 0.1220 0.1240 3.05 3.10 3.15 1

E 0.1969 BSC 5.00 BSC 1

E2 0.1202 0.1221 0.1241 3.05 3.10 3.15 1

e 0.0256 BSC 0.65 BSC 1

L 0.0197 0.0236 0.0276 0.50 0.60 0.70 1

JEDEC #: MO-220

Controlling Dimension is Millimeters.

Parameter Symbol Min Typ Max Units

Junction to Ambient Thermal Impedance 2 Layer Board

4 Layer Board



128

°C/Watt

Side View

Pin #1 Corner

Bottom View

Top View

Pin #1 Corner

20-PIN QFN (5  5 MM BODY) PACKAGE DRAWING

1 2 ... 29 30 31 32 33 34 35

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Cirrus-logic CS8421 Manual do Utilizador Página 34