SHT1x / SHT7x Relative Humidity & Temperature Sensor System

www.sensirion.com

v2.02 July 2004

8/9

5.2 SHT7x (4-pin single-in-line)

Table 11 SHT7x Pin Description

The device is supplied in a single-in-line pin type package.

The sensor housing consists of a Liquid Crystal Polymer

(LCP) cap with epoxy glob top on a standard 0.6 mm FR4

substrate. The device is Cd and Hg free.

The sensor head is connected to the pins by a small bridge

to minimize heat conduction and response times. The gold

plated back side of the sensor head is connected to the GND

pin.

A 100nF capacitor is mounted on the back side between

VDD and GND.

All pins are gold plated to avoid corrosion. They can be

soldered or mate with most 1.27 mm (0.05’’) sockets

e.g.: Preci-dip / Mill-Max 851-93-004-20-001 or similar

Total weight: 168 mg, weight of sensor head: 73 mg

The production date is printed onto the cap in white numbers

in the form wwy. e.g. ”351” = week 35, 2001.

5.2.2 Delivery Conditions

The SHT7x are shipped in 32 mm tape. These reeled parts

in standard option are shipped with 500 units per 13 inch

diameter reel. Reels are individually labelled with barcode

and human readable labels.

Cover Tape

Carrier Tape

Leader Tape

500mm minimum

Trailer Tape

300mm minimum

Components

Figure 16 Tape configuration and unit orientation

Standard wave SHT7x soldering ovens may be used at

maximum 235 °C for 20 seconds.

For manual soldering contact time must be limited to 5

seconds at up to 350 °C.

After wave soldering the devices should be stored at

>74 %RH for at least 24 h to allow the polymer to rehydrate.

Please consult the application note “Soldering procedure” for

more information.

1

Other packaging options may be available on request.

2

For maximum accuracy do not solder SHT75!

Pin Name

Comment

1

SCK

Serial clock input

2

VDD

Supply 2.4 - 5.5 V

3

GND

Ground

4

DATA

Serial data bidirectional

3.7

1.27

5.08

1.2

0.46

2.2

3.1

0.6

0.2

2

(0.15)

(0.05)

(0.2)

(0.05)

(0.018)

(0.01)

(0.08)

(0.024)

(0.12)

(0.09)

12

4

3

Figure 17 SHT7x dimensions in mm (inch)