HSDL-3612 Datasheet, PDF (16/25 Pages) Agilent(Hewlett-Packard) – IrDA Data Compliant 115.2kb/s 3V to 5V Infrared Transceiver

1.2 Adjacent Land Keep-out and Solder Mask Areas
Dim.
h
j
k
l
mm
min. 0.2
13.4
4.7
3.2
Inches
min. 0.008
0.528
0.185
0.126
• Adjacent land keep-out is the maximum space oc-
cupied by the unit relative to the land pattern. There
should be no other SMD components within this
area.
• “h” is the minimum solder resist strip width required
to avoid solder bridging adjacent pads.
• It is recommended that 2 fiducial cross be placed at
mid-length of the pads for unit alignment.
Note: Wet/Liquid Photo-Imaginable solder resist/mask is recommended.
j
Tx LENS
LAND
h
Y
Rx LENS
SOLDER
MASK
DIM.
mm
INCHES
h
MIN. 0.2 MIN. 0.008
j
13.4
0.528
k
4.7
0.185
l
3.2
0.126
k
• ADJACENT LAND KEEP-OUT IS THE
MAXIMUM SPACE OCCUPIED BY THE
UNIT RELATIVE TO THE LAND PATTERN.
THERE SHOULD BE NO OTHER SMD
COMPONENTS WITHIN THIS AREA.
• "h" IS THE MINIMUM SOLDER RESIST
STRIP WIDTH REQUIRED TO AVOID
SOLDER BRIDGING ADJACENT PADS.
• IT IS RECOMMENDED THAT 2 FIDUCIAL
CROSS BE PLACED AT MID-LENGTH OF
l
THE PADS FOR UNIT ALIGNMENT.
Figure 3.0. HSDL-3612-007/-037 PCBA – Adjacent land keep-out and solder mask.
2.0 Recommended Solder Paste/Cream Volume for
Castellation Joints
Based on calculation and experiment, the printed solder
paste volume required per castellation pad is 0.30 cubic
mm (based on either no-clean or aqueous solder cream
types with typically 60 to 65% solid content by volume).
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