
SHT1x / SHT7x Relative Humidity & Temperature Sensor System
www.sensirion.com
v2.02 July 2004
7/9
5 Package Information
5.1 SHT1x (surface mountable)
Table 10
SHT1x Pin Description
5.1.1 Package type
The SHT1x is supplied in a surface-mountable LCC
(Leadless Chip Carrier) type package. The sensors housing
consists of a Liquid Crystal Polymer (LCP) cap with epoxy
glob top on a standard 0.8 mm FR4 substrate. The device is
free of lead, Cd and Hg.
Device size is 7.42 x 4.88 x 2.5
mm (0.29 x 0.19 x 0.1 inch)
Weight 100 mg
The production date is printed onto the cap in white numbers
in the form wwy. e.g. ”351” = week 35, 2001.
5.1.2 Delivery Conditions
The SHT1x are shipped in 12mm tape at 100pcs or 400pcs..
Reels are individually labelled with barcode and human
readable labels. The Lot numbers allow full traceability
through production, calibration and test.
2.8mm
Cover Tape
Carrier Tape
Leader Tape
480mm minimum
Trailer Tape
300mm minimum
Components
Figure 12
Tape configuration and unit orientation
5.1.3 Soldering Information
Standard reflow soldering ovens may be used
. For details
please see application note "soldering procedure"
.
For manual soldering contact time must be limited to 5
seconds at up to 350 °C.
After soldering the devices should be stored at >74 %RH for
at least 24h to allow the polymer to rehydrate.
Please consult the application note “Soldering procedure” for
more information.
5.1.4 Mounting Examples
Figure 13
SHT1x PCB Mounting example
The SF1 membrane filter cap is available for optimal IP67
protection. When mounted through a housing the interior can
be protected from the environment while still allowing high
quality humidity measurements (see example below).
o-ring
housing
housing
P
C
B
S
H
T
1
x
F
i
l
t
e
r
c
a
p
melt
e
d
p
l
a
s
t
i
c
p
i
n
Figure 14
SF1 IP67 filter cap mounting example
Pin Name
1
GND
2
DATA
3
SCK
4
VDD
NC
Comment
Ground
Serial data, bidirectional
Serial clock, input
Supply 2.4 - 5.5 V
Remaining pins must be left unconnected
7.08 (0.278)
1
7
4.88 (0.19)
1
(
2.44
(0.1)
3
N
1
2
3
4
sensor opening
NC
NC
NC
NC
NC
NC
1.9
(0.07)
5
0
(
1.49
(0.06)
(
6
1.15
(0.04)
2
(
actual size
0
(
Top View
Side View
Recommended PCB Footprint
4
0
(
0
(
1.8
(0.07)
1.8
(0.07)
3.48 (0.137)
1
(
1
Figure 15
SHT1x drawing and footprint dimensions in mm (inch)
Slit to minimize heat
transfer from the PCB