SLLA683 July   2026 ISO6021 , ISO6041 , ISO6420 , ISO6420-Q1 , ISO6421 , ISO6421-Q1 , ISO6431 , ISO6431-Q1 , ISO6440 , ISO6440-Q1 , ISO6441 , ISO6441-Q1 , ISO6442 , ISO6442-Q1 , ISO6462 , ISO6463

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2 Narrow Body Package Comparisons for 3.7mm and 4mm Creepage and Clearance Packages
    1. 2.1 Two Channel Devices in Narrow Body Package Comparisons
    2. 2.2 3, 4, and 6 Channel Devices in Narrow Body Package Comparisons
  6. 3 Wide Body Package Comparisons for 8mm Creepage and Clearance
    1. 3.1 2 Channel Devices in Wide Body Package Comparisons
    2. 3.2 3, 4, and 6 Channel Devices in Wide Body Package Comparisons
  7. 4Summary
  8. 5References

2.2 3, 4, and 6 Channel Devices in Narrow Body Package Comparisons

Table 3-4 summarizes the advantages of the 16-DFB, used for 3 and 4 channel devices, and the 20-DFB, used for 6 channel devices, with respect to the traditional 16-DBQ package for 3, 4, and 6 channel devices. The DFB packages provide 4mm of creepage and clearance versus the 3.7mm provided by the 16-DBQ.

Table 2-2 3, 4 and 6 Channel Digital ISO in Narrow, 3.7mm and 4mm Creepage and Clearance Packages
Package Channel Count Device ISO Rating Creepage and Clearance (mm) % area savings vs Traditional Package (16-DBQ) Area (mm2) X (mm) Y (mm) Pin Pitch (mm Z (mm)
(PCB land pattern lead to lead maximum) (package body size maximum) (height of package above PCB maximum)
20-DFB (SSOP) 6 Reinforced, Basic > 4 -1.5% (1) 35.5 6.9 5.15 0.5 1.75
16-DBQ (SSOP) (Traditional Package) 3, 4, 6 Reinforced, Basic, Galvanic >3.7 Traditional (Reference) 35.0 7 5 0.635 1.75
16-DFB (SSOP) 3, 4 Reinforced, Basic > 4 29.7 6.9 4.3 0.5 1.75
(1) Six channel devices use the 20-DFB package. The 20-DFB package is only 0.5mm2 (1.5%) larger than the traditional 16-DBQ package but offers 4mm of creepage and clearance vs the traditional 3.7mm. The 20-DFB adds a functional pin, providing additional features, such as output enable (ENx) for the ISO60xx family, in a 6 channel device in 20-DFB package versus devices in the traditional 16-DBQ.
(2) Three and four channel devices use the 16-DFB package. The 16-DFB is 5.8mm2 (15%) smaller than the 16-DBQ package and offers 4mm of creepage and clearance vs 3.7mm. The 16-DFB has the functional pin for three and four channel devices, the same as the traditional 16-DBQ package .
3 and 4 Channel Digital ISO in Narrow Packages, Area Comparison (mm2): Traditional 16-DBQ (SSOP) vs Small Form Factor 16-DFB (SSOP) Figure 2-3 3 and 4 Channel Digital ISO in Narrow Packages, Area Comparison (mm2): Traditional 16-DBQ (SSOP) vs Small Form Factor 16-DFB (SSOP)
3 and 4 Channel Digital ISO in Narrow Packages, Package Percentage Comparison: Traditional 16-DBQ (SSOP) vs Small Form Factor 16-DFB (SSOP) Figure 2-4 3 and 4 Channel Digital ISO in Narrow Packages, Package Percentage Comparison: Traditional 16-DBQ (SSOP) vs Small Form Factor 16-DFB (SSOP)
6 Channel Digital ISO in Narrow Packages, Area Comparison (mm2): Traditional 16-DBQ (SSOP) vs Small Form Factor 20-DFB (SSOP) Figure 2-5 6 Channel Digital ISO in Narrow Packages, Area Comparison (mm2): Traditional 16-DBQ (SSOP) vs Small Form Factor 20-DFB (SSOP)
6 Channel Digital ISO in Narrow Packages, Package Percentage Comparison: Traditional 16-DBQ (SSOP) vs Small Form Factor 20-DFB (SSOP) Figure 2-6 6 Channel Digital ISO in Narrow Packages, Package Percentage Comparison: Traditional 16-DBQ (SSOP) vs Small Form Factor 20-DFB (SSOP)