Table schema:
CREATE TABLE table_name_63 (body_width_mm INTEGER, lead_pitch_mm VARCHAR, part_number VARCHAR)

Question: Which Body Width/mm has a Lead Pitch/mm smaller than 0.55, and a Part Number of tsop48?
SQL: SELECT MIN(body_width_mm) FROM table_name_63 WHERE lead_pitch_mm < 0.55 AND part_number = "tsop48"