Look for:
Example: A UART connecting a 3.3 V ZD95GF to a 5 V system uses a simple MOSFET-based level shifter on the RX/TX lines or a dedicated bidirectional level shifter chip. zd95gf schematic best
The ZD95GF branding sometimes appears in Sanken or older Mitsumi power IC catalogs. Visit the official Sanken Electric website. Navigate to their “Discontinued ICs” or “Application Notes” section. Look for: Example: A UART connecting a 3