Dtech DT-9011 RS-232 Isolator
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Overview
Chinese bus powered ("passive") RS-232 isolator.
Bill of Materials
| Name | Package | Marking | Description | Link |
|---|---|---|---|---|
| R1-R2 | 122 | 0805 | 1.2kΩ resistor | |
| C1-C6 | 3528 ("B") | 106C 504F2 | 10μF tantalum | |
| Q1-Q2, Q4, Q6-Q8 | SOT-23 | LD3 v | BAT54 Schottky diode maybe? | |
| Q3, Q5 | SOT-23 | LD3 6 | BAT54 Schottky diode maybe? | |
| U1-U2 | SOIC-8 | M?r?ne MB??660C 1940 | ||
| U3-U6 | SO-6 (4 leads) | [Toshiba Logo] 747 P185 GR J0 | Toshiba TLP185 | Toshiba TLP185(GR-TPR,E) |
U1 and U2 have their markings partially ground off. The company logo appears to start with a cursive M and end with a cursive e, and it might be a LMC7660/ICL7660/TC7660/TL7660 charge pump.
The board has edge soldered connectors similar to these:
Online Resources
DTECH DT-9011 Passive RS232 Photoelectric Isolation Protector,Industrial Ethernet Serial Converter
HDMI Matrix,DVI Splitter,Guangzhou Dtech Electronics Technology Co.,Ltd.
Dtech Industrial Converter Catalog
Microchip AN782 TC7660 Powers RS-232 Data Loop Low Cost Adapter (DS00782A) (possibly relevant application note)