Hermetic Packages for Integrated Circuits Package Outline Drawing R48.B 48 CERAMIC QUAD FLATPACK PACKAGE (CQFP) WITH BOTTOM HEATSINK Rev 0, 10/12 1.118 (28.40) 1.080 (27.43) 0.572 (14.53) 0.555 (14.10) #1 #48 0.287 (7.29) 0.253 (6.43) 0.040 (1.016) BSC PIN 1 INDEX AREA 1.118 (28.40) 1.080 (27.43) 0.572 (14.53) 0.555 (14.10) 0.012 (0.30) 0.008 (0.20) TOP VIEW 0.131 (3.33) 0.105 (2.67) 0.042 (1.067) REF 0.026 (0.66) MIN. 2 0.013 (0.33) 0.009 (0.23) HEATSINK SIDE VIEW 0.359 (9.12) 0.349 (8.87) HEATSINK 0.359 (9.12) 0.349 (8.87) PIN 1 INDEX AREA NOTES: 1. All dimensions are in inches (millimeters) 2. Dimension shall be measured at point of exit (beyond the meniscus) of the lead from the body. 1 #1 #48 BOTTOM VIEW