A standard RS-232 MAX3232 line driver from Maxim performs the TTL-to-RS-232 conversion. The MAX3232 accepts a 5 or 3.3V supply voltage, which is switch-selectable using S 1. D 1 and D 2 block the ...

The TWN4 MultiTech 2 reader is an all-in-one proximity reader for the following frequencies: 125 kHz, 134.2 kHz, 13.56 MHz, NFC. It can be connected through UART (TTL, RS232), and USB, and is ...

ELATEC T4BO-F6 TWN4 MultiTech 2 LF/HF/NFC OEM RFID Card/Smartphone Reader Module Technical Specification. ... It can be connected through UART (TTL, RS232), USB, as well as Ethernet, and is available ...