Package Information 28-pin SOP (300mil) Outline Dimensions Symbol A Dimensions in inch Min. Nom. Max. — 0.406 BSC — B — 0.295 BSC — C 0.012 — 0.020 C’ — 0.705 BSC — D — — 0.104 E — 0.050 BSC — F 0.004 — 0.012 G 0.016 — 0.050 H 0.008 — 0.013 α 0° ― 8° Symbol Dimensions in mm Min. Nom. Max. A — 10.30 BSC — B — 7.5 BSC — 0.51 C 0.31 — C’ — 17.9 BSC — D — — 2.65 E — 1.27 BSC — F 0.10 — 0.30 G 0.40 — 1.27 H 0.20 — 0.33 α 0° ― 8° http://www.holtek.com.tw/pdf/guide.pdf October 17, 2013