2 Pin Diagrams Figure 2-1. 28-Pin SPDIP 28-Pin SSOP 28-Pin SOIC Figure 2-2. 28-Pin VQFN Note: It is recommended that the exposed bottom pad be connected to VSS; however, it must not be the only VSS connection to the device. Figure 2-3. 40-Pin PDIP Figure 2-4. 40-Pin QFN Note: It is recommended that the exposed bottom pad be connected to VSS; however, it must not be the only VSS connection to the device. Figure 2-5. 44-Pin TQFP Figure 2-6. 48-Pin VQFN Note: It is recommended that the exposed bottom pad be connected to VSS; however, it must not be the only VSS connection to the device. Figure 2-7. 48-Pin TQFP