S6E2H Datasheet, PDF (53/163 Pages) Cypress Semiconductor – 32-bit ARM ® Cortex ® -M4F FM4 Microcontroller

S6E2H Series
Latch-up
Semiconductor devices are constructed by the formation of P-type and N-type areas on a substrate. When subjected to abnormally
high voltages, internal parasitic PNPN junctions (called thyristor structures) may be formed, causing large current levels in excess of
several hundred mA to flow continuously at the power supply pin. This condition is called latch-up.
CAUTION: The occurrence of latch-up not only causes loss of reliability in the semiconductor device, but can cause injury or
damage from high heat, smoke or flame. To prevent this from happening, do the following:
(1) Be sure that voltages applied to pins do not exceed the absolute maximum ratings. This should include attention to abnormal
noise, surge levels, etc.
(2) Be sure that abnormal current flows do not occur during the power-on sequence.
Observance of Safety Regulations and Standards
Most countries in the world have established standards and regulations regarding safety, protection from electromagnetic
interference, etc. Customers are requested to observe applicable regulations and standards in the design of products.
Fail-Safe Design
Any semiconductor devices have inherently a certain rate of failure. You must protect against injury, damage or loss from such
failures by incorporating safety design measures into your facility and equipment such as redundancy, fire protection, and
prevention of over-current levels and other abnormal operating conditions.
Precautions Related to Usage of Devices
Cypress semiconductor devices are intended for use in standard applications (computers, office automation and other office
equipment, industrial, communications, and measurement equipment, personal or household devices, etc.).
CAUTION: Customers considering the use of our products in special applications where failure or abnormal operation may directly
affect human lives or cause physical injury or property damage, or where extremely high levels of reliability are demanded (such as
aerospace systems, atomic energy controls, sea floor repeaters, vehicle operating controls, medical devices for life support, etc.)
are requested to consult with sales representatives before such use. The company will not be responsible for damages arising from
such use without prior approval.
8.2 Precautions for Package Mounting
Package mounting may be either lead insertion type or surface mount type. In either case, for heat resistance during soldering, you
should only mount under Cypress's recommended conditions. For detailed information about mount conditions, contact your sales
representative.
Lead Insertion Type
Mounting of lead insertion type packages onto printed circuit boards may be done by two methods: direct soldering on the board, or
mounting by using a socket.
Direct mounting onto boards normally involves processes for inserting leads into through-holes on the board and using the flow
soldering (wave soldering) method of applying liquid solder. In this case, the soldering process usually causes leads to be subjected
to thermal stress in excess of the absolute ratings for storage temperature. Mounting processes should conform to Cypress
recommended mounting conditions.
If socket mounting is used, differences in surface treatment of the socket contacts and IC lead surfaces can lead to contact
deterioration after long periods. For this reason it is recommended that the surface treatment of socket contacts and IC leads be
verified before mounting.
Surface Mount Type
Surface mount packaging has longer and thinner leads than lead-insertion packaging, and therefore leads are more easily deformed
or bent. The use of packages with higher pin counts and narrower pin pitch results in increased susceptibility to open connections
caused by deformed pins, or shorting due to solder bridges.
You must use appropriate mounting techniques. Cypress recommends the solder reflow method, and has established a ranking of
mounting conditions for each product. Users are advised to mount packages in accordance with Cypress ranking of recommended
conditions.
Document Number: 001-98943 Rev *C
Page 53 of 163