BS 7588:1993

Committees responsible
Foreword
Guide
Section 1. General
     Introduction
1.1 Scope
1.2 Informative references
1.3 Definitions
Section 2. The HIT connector system
2.1 The HIT concept and range
2.2 The HIT connector system
2.3 Component accommodation
2.4 Designations
2.5 Ratings and characteristics
Section 3. Circuit board details
3.1 Introduction
3.2 Child board practice
3.3 Daughter board practice
3.4 Conformal coating
Section 4. Packaging and handling
4.1 Packaging
4.2 Mounting to the daughter board
4.3 HIT module handling
Section 5. Mechanical design considerations
5.1 Hardware description
5.2 Thermal management
5.3 EMC shielding
5.4 Vibration response
Section 6. Testing and design for testability
6.1 General
6.2 Child boards
6.3 Daughter boards
6.4 Standard pin connections
Tables
1 Number of edge contacts per childboard
2 First mode response in fore/aft direction
3 First mode response in lateral direction
4 Recommended pin positions for logic power supply
     rails
5 Recommended pin positions for screens
6 Recommended pin positions for optional functions
Figures
1 System structure
2 HIT connector concept
3 Rectangular HIT connectors
4 Linear HIT connectors
5 Standard profile child boards: usable area and
     dimensions
6 Simplified profile child boards: usable area and
     dimensions
7 Vertical clearances
8 Size A child board: standard profile
9 Size B child board: standard profile
10 Size A child board: simplified profile
11 Size B child board: simplified profile
12 Linear 16-way child board: dimensional constraints
13 Linear 32-way child board: dimensional constraints
14 Linear 64-way child board: dimensional constraints
15 Daughter board footprints: rectangular HIT
     connectors
16 Daughter board footprints: linear HIT connectors
17 Typical partitioning of a double Eurocard
18 Child board masking and alignment marks
19 Alignment marks on breakout panels
20 Packaging for individual rectangular HIT connectors
21 Packaging for multiple rectangular HIT connectors
22 Thermal management using convection cooling
23 EMC shielding
24 Pin numbering for rectangular child boards
List of references

Provides a guide to an interconnection system for circuit board partitioning, allowing for a modular construction and solderless assembly of the sub-units.