can i use on android?

Yes, it doesn’t use any computer resources. It only converts from RS232 to TTL logic levels (and back again). There are some handy LEDs that flash when data is being transferred.

Does this device support Xon/Xoff on board, or can any buffering be removed to ensure xon/xoff works correctly ?

It is a "dumb" level shifter with a small buffer on the comms chip and will implement whatever parameters you set up for your comms. Xon/Xoff is implemented in the software flow of the comms software you use (decimal values of 17 and 19) and these characters and are treated in the same way as other data. It is the comms software that has to deal with Xon/Xoff not the DSD adaptor.

Does this work with Mac catalina?

macOS Catalina (version 10.15) is the sixteenth and, as of May 2020, current major release of macOS. In the description for DSD TECH USB to TTL Serial adapter is says it supports mac, so yes.

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🔗 Connect Smarter, Debug Faster — The Ultimate USB to TTL Adapter for Pros

FLEXIBLE VOLTAGE SUPPORT - Seamlessly switch between 3.3V and 5V output via jumper settings to match your MCU’s power requirements.
INTUITIVE LED INDICATORS - Stay in control with clear TX, RX, and Power LEDs that make debugging and connection status instantly visible.
ROCK SOLID FTDI FT 232 RL CHIP - Built on the industry-trusted FTDI chip for unmatched stability and compatibility across Windows, Mac, and Linux.
BLAZING FAST 3 MBPS DATA TRANSFER - Experience ultra-responsive serial communication with speeds up to 3Mbps, perfect for real-time debugging and data streaming.
RELIABLE GLOBAL SUPPORT WARRANTY - Join over 100,000 satisfied users worldwide backed by responsive technical support and a 1-year replacement guarantee.

The DSD TECH SH-U09C USB to TTL Serial Adapter leverages the high-performance FTDI FT232RL chip to deliver stable, cross-platform serial communication at speeds up to 3Mbps. Featuring intuitive LED indicators and flexible voltage output options, it’s designed for seamless MCU interfacing and debugging. Trusted by over 100,000 users globally, it comes with dedicated technical support and a 1-year warranty, making it the go-to choice for professional developers and engineers.

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TrustScore 4.5 | 7,300+ reviews

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Package Dimensions L x W x H	13.2 x 8.6 x 2.3 centimetres
Package Weight	0.03 Kilograms
Product Dimensions L x W x H	5.6 x 2 x 0.3 centimetres
Item Weight	0.03 Kilograms
Brand	DSD TECH
Colour	Black
Part number	SH-U09C
Warranty description	one year warranty from date of purchase
Guaranteed software updates until	unknown

DSD TECH SH-U09C USB to TTL Serial Adapter with FTDI FT232RL Chip Compatible with Windows Mac Linux

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