SPRAA99C March   2008  – May 2021 AM3351 , AM3352 , AM3354 , AM3356 , AM3357 , AM3358 , AM3359 , AM4372 , AM4376 , AM4377 , AM4378 , AM4379 , OMAPL138B-EP , TMUX646

 

  1.   Trademarks
  2. 1Introduction
  3. 2PCB Design Considerations
    1. 2.1 Solder Land Areas
    2. 2.2 Conductor Width/Spacing
    3. 2.3 High-Density Routing Techniques
    4. 2.4 Via Density
    5. 2.5 Conventional PCB Design
    6. 2.6 Advanced Design Methods
  4. 3Reliability
    1. 3.1 Reliability Calculations
    2. 3.2 Package Characteristics
    3. 3.3 Thermal Modeling
  5. 4Surface-Mounting nFBGA Packages
    1. 4.1 Design for Manufacturability (DFM)
    2. 4.2 Solder Paste
    3. 4.3 Solder Ball Collapse
    4. 4.4 Reflow
    5. 4.5 Inspection
  6. 5Packing and Shipping
    1. 5.1 Tray Packing Method
    2. 5.2 Tape-and-Reel Packing Method
    3. 5.3 Tape Format
    4. 5.4 Device Insertion
    5. 5.5 Packaging Method
  7. 6Sockets
    1. 6.1 The Design Challenge
    2. 6.2 Contacting the Ball
    3. 6.3 Pinch Contact
    4. 6.4 Micro Tuning Fork Contact
    5. 6.5 Texas Instruments Sockets
  8. 7Summary
  9.   A Frequently Asked Questions
    1.     A.1 Package Questions
    2.     A.2 Assembly Questions
    3.     A.3 Small Body nFBGA Package Questions
  10.   B Package Data Sheets
  11.   C Thermal Modeling Results
  12.   Revision History

Tape Format

Typical tape format is shown in Figure 5-5. The variables used in Figure 5-3 and Table 5-1 are defined as follows: W is the tape width; P is the pocket pitch; and F is the distance between the drive hole and the centerline of the pocket.

GUID-E8594864-F157-4C3E-8C1C-635ED810449B-low.gif Figure 5-3 Single Sprocket Tape Dimension
Table 5-1 Tape Dimensions
Tape Width (W) Pocket Pitch (P) Centerline to Drive Hole (F) Package Size(1)
16 8 7.5 6 × 6
16 12 7.5 8 × 8
24 16 11.5 10 × 10
24 16 11.5 12 × 12
24 16 11.50 13 × 13
24 24 11.50 14 × 14
8 4 3.5 2 × 1.4
8 4 3.5 2 × 2.5
12 4 5.5 2.45 × 2.45
12 4 5.5 2.5 × 3
All dimensions are in millimeters.

The reels are shown in Figure 5-4. In this figure, G is the width of the tape, N is the diameter of the hub, and T is the total reel thickness.

GUID-FAF71595-1A94-48D7-9934-A4FE1FFC8BEB-low.gif Figure 5-4 Reel Dimensions
Table 5-2 Reel Dimensions(1)
Tape Width (G) Parts per Reel
16 2500
24 1000
After the parts are loaded into the reel, each individual reel is packed in its own “pizza” box for shipping, as shown in Figure 5-5.

After the parts are loaded into the reel, each individual reel is packed in its own “pizza” box for shipping, as shown in Figure 5-5.

GUID-3E625144-49BA-42A5-BDE9-6667DFE47538-low.gif Figure 5-5 Tape-and-Reel Packing