HFBR-dat
HFBR-4503Z
Best Way to Use POF for 5V TTL Serial:
TX Side (Microcontroller)
--------------------------
MCU TX ──► HFBR-1521 (Transmitter)
GND ─────┬──────────────────────┐
Vcc (5V) ──────────────────────►
RX Side (Receiver)
-------------------
POF Fiber ──► HFBR-2521 (Receiver)
Output ─────► MCU RX
GND ─────────┴──────────────────