2 Pin Diagrams Figure 2-1. 28-Pin SPDIP, SOIC, SSOP Figure 2-2. 28-Pin VQFN Note: It is recommended that the exposed bottom pad be connected to VSS. Figure 2-3. 40-Pin PDIP Figure 2-4. 40-Pin VQFN Note: It is recommended that the exposed bottom pad be connected to VSS. Figure 2-5. 44-Pin TQFP Note: It is recommended that the exposed bottom pad be connected to VSS. Figure 2-6. 48-Pin VQFN Note: It is recommended that the exposed bottom pad be connected to VSS. Figure 2-7. 48-Pin TQFP Note: It is recommended that the exposed bottom pad be connected to VSS.