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CMOS SR Latch (U6): https://www.onsemi.com/pub/Collateral/NCP45520-D.PDF
Micropower Comparator (U7): http://www.ti.com/lit/ds/symlink/tlv1701-q1.pdf
2-Input AND Gate (U8): http://rohmfs.rohm.com/en/products/databook/datasheet/ic/logic_switch/standard_logic/bu4s81g2-e.pdf
Isolated DC/DC Converter (U9): https://uk.rs-online.com/webdocs/0ad5/0900766b80ad5e24.pdf
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